Light source device, and two-dimensional image display unit
Abstract
A light source device capable of downsizing a two-dimensional image display unit to a possible limit. The device comprises three, red, blue and green, coherent light sources (11a), (11b), (11c), prisms (12a), (12c) for reflecting lights output from the coherent light sources (11a), (11c), and a diffraction unit (20) that consists of one sheet of volume hologram of a plurality of gratings in multiple layers and diffracts a light from the coherent light source (11b) and lights output from the coherent light sources (11a), (11c) and reflected off the prisms (12a), (12b) so that these lights propagate through the same light path.

Term
No projected expiry on record.
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16 claims: 6 independent, 10 dependent
- 1請求の範囲 [1] 少なくとも 2つのコヒーレント光源と、 該少なくとも 2つのコヒーレント光源から出射された各光が同一光路を伝搬するよう 、少なくとも 1つのコヒーレント光源から出射された光を回折する回折部と、を具備する ことを特徴とする光源装置。
- 2[2] 請求項 1に記載の光源装置において、 前記少なくとも 2つのコヒーレント光源から出射された各光の伝搬光路は、前記回折 部上で互いに重なり合う、 ことを特徴とする光源装置。
- 3[3] 請求項 1に記載の光源装置において、 前記少なくとも 2つのコヒーレント光源から出射された各光の伝搬光路の中心軸は、 前記回折部上の一点で交わる、 ことを特徴とする光源装置。
- 4[4] 請求項 1に記載の光源装置において、 前記少なくとも 2つのコヒーレント光源は、同一のサブマウント上に設置される、 ことを特徴とする光源装置。
- 5[5] 請求項 1に記載の光源装置において、 前記コヒーレント光源は、 赤色光を発光するコヒーレント光源と、緑色光を発光するコヒーレント光源と、青色 光を発光するコヒーレント光源である、 ことを特徴とする光源装置。
- 6[6] 請求項 1に記載の光源装置において、 前記回折部は、前記コヒーレント光源のうち、少なくとも 1つのコヒーレント光源から 出射される光が、該回折部で回折せずに通過するものである、 ことを特徴とする光源装置。
- 7[7] 請求項 1に記載の光源装置において、 前記回折部は、 1つの回折素子で構成され、 前記回折素子は、該少なくとも 2つのコヒーレント光源から出射された各光が同一光 路を伝搬するよう、少なくとも 1つのコヒーレント光源から出射された光を回折する、 ことを特徴とする光源装置。
- 8[8] 請求項 7に記載の光源装置において、 前記回折素子は、レンズ作用を更に備える、 ことを特徴とする光源装置。
- 9[9] 請求項 1に記載の光源装置において、 前記回折部は、 受光した少なくとも 2つの光が同一光路を伝搬するよう、該受光した少なくとも 1つの 光を回折する第 1の回折素子と、 前記少なくとも 2つのコヒーレント光源のうちの、少なくとも 1つのコヒーレント光源力、 ら出射された光を、該各コヒーレント光源からの光の伝搬光路の中心軸が前記第 1の 回折素子上の一点で交わるように回折する第 2の回折素子と、からなる、 ことを特徴とする光源装置。
- 10[10] 請求項 9に記載の光源装置において、 前記第 2の回折素子は、レンズ作用を更に備え、 前記第 2の回折素子は、前記少なくとも 2つのコヒーレント光源から出射される各光 を集光して、該第 2の回折素子にて回折された各光が、前記第 1の回折素子の同一 領域を照射するようにする、 ことを特徴とする光源装置。
- 11[11] 請求項 7または請求項 9に記載の光源装置において、 前記回折素子は、体積ホログラムであり、 該体積ホログラムは、前記少なくとも 2つのコヒーレント光源から出射される各光を受 光して、該各光の伝搬方向を変化させる複数のグレーティングが多重化されてレ、る、 ことを特徴とする光源装置。
- 12[12] 請求項 7に記載の光源装置において、 前記回折素子は、領域分割されており、 該回折素子の各分割領域において回折された各光が、同一平面領域を照射する ことを特徴とする光源装置。
- 13[13] 請求項 9に記載の光源装置において、 前記第 1の回折素子は、領域分割されており、 該第 1の回折素子の各分割領域において回折された各光が、同一平面領域を照 射する、 ことを特徴とする光源装置。
- 14[14] 請求項 12または請求項 13に記載の光源装置において、 前記回折素子は、格子状に領域分割されている、 ことを特徴とする光源装置。
- 15[15] 少なくとも 2つのコヒーレント光源と、 該少なくとも 2つのコヒーレント光源から出射された各光が同一光路を伝搬するよう 、少なくとも 1つのコヒーレント光源から出射された光を回折する回折部と、 該回折部上の空間に設けられ、該回折部で回折され同軸ビームにされた各光を受 光する 2次元空間光変調素子と、を具備する、 ことを特徴とする 2次元画像表示装置。
- 16[16] 請求項 15に記載の 2次元画像表示装置において、 前記少なくとも 2つのコヒーレント光源の動作を制御する制御部を備え、 前記少なくとも 2つのコヒーレント光源は、赤色光を発光するコヒーレント光源と、緑 色光を発光するコヒーレント光源と、青色光を発光するコヒーレント光源であり、 前記制御部は、該 3つのコヒーレント光源を、時間分割されて順次光を出射するよう に制御する、 ことを特徴とする 2次元画像表示装置。
Independent claims16
189 paragraphs in 1 section, as filed
0001Specification
0002light equipment -- and -- Two-dimensional image display device
0003Technical field
0004[0001] the present invention -- light equipment -- and -- being related with a two-dimensional image display device -- especially -- the light equipment which realizes the miniaturization of a two-dimensional image display device, and the light equipment were used -- small Two-dimensional image display device It is related.
0005Background art
0006[0002] A skillful color expression is possible in recent years. The two-dimensional image display device (laser display device) attracts attention. this is red and the thing which used three green and blue coherent light sources (for example, laser light source) -- a figure -- composition like 13 is taken.
0007[0003] a figure -- it sets to 13 -- 600 used the conventional laser light source It is a two-dimensional image display device. this two-dimensional image display device 600 -- red, green, blue laser light source 601a, 601b, 601c, and , beam extract /° Nda 602a, 602b and 602c, Optical integrator 603a, 603b, 603c, and mirror 604a and 604c, Diffusion board 606a, 606b, 606c, and diffusion board transportation device 605a and 60 5b and 605c, It has spatial-light-modulation element 607a, 607b, 607c, the phi Noredo lens 608a, 608b and 608c, dichroic prism 609, and projection lens 610, and is The.
0008[0004] this -- Two-dimensional image display device 600 The light from red, green, blue laser light source 601a, 601b, and 60 lc is expanded by beam expander 602a, 602b, and 602c, respectively, and it is an optical inn. Taegu Lother 603a, 603b, and 603c are passed. Optical integrator 603a and 603c are passed. As for Red light and blue light, Optical path is bent by mirror 604a and 604c 90 degrees, Optical Int Each bending [ as for the green light which passed grater 603b / Optical path ] Without, phi Noredo lens 608a, 608b, 608c, diffusion board 606a, 606b, and 606c are passed, and it is empty. Optical abnormal-conditions matter It irradiates with child 607a, 607b, and 607c. 3 sorts of laser light source 601 a, 601b, 601c power Light It is spatial-light-modulation element 607a and 6 by passing optical integrator 603a, 603b, and 603c. The illumination distribution on 07b and 607c becomes fixed. It is multiplexed with dichroic prism 609 and the light independently modulated, respectively by this spatial-light-modulation element 607a, 607b, and 607 c is the same. It becomes a coaxial beam which spreads Optical path, and also enlargement projection is carried out with projection lens 610, and it is Scree. It is imaged on A 61. that time -- since laser beam coherence is high -- screen 61 -- projection -- The image is overlapped on a speckle noise. It is diffusion board 606a, 606b, and 6 in order to prevent this. 06c is rocked in diffusion board transportation device 605a, 605b, and 605c, and it is time common about a speckle noise. It is made to carry out Uniformity.
0009[0005] however, a figure -- the former as shown in 13 in order to expand the light from three sorts of laser light source 601a 601c in two-dimensional image display device 600 and to make light intensity distribution uniform -- beam Expander and an optical integrator are [ three each ] needed. From the three above-mentioned sorts of laser light sources In order to make it the coaxial beam which is mutually parallel in light and spreads the same Optical path, it is in the device concerned. It is also necessary to arrange many lenses and mirrors. For this reason, the former Two-dimensional image display The subject that the whole device will become large-scale [ a device ] occurred.
0010[0006] in order to solve this subject -- the optical system of a two-dimensional image display device -- a figure -- it is shown in 14 -- as It is Die Kreuz about the light first emitted from red and the green and blue laser light source of 3 colors. Style which passes a beam expander and an optical integrator after mixing using Kumira It is possible to use Formation.
0011[0007] a figure -- it sets to 14 -- the conventional laser light source was used for 700 It is a two-dimensional image display device.
0012this -- , Two-dimensional image display device 700 is provided with the following. Red, green, blue laser light source 701a, 701b, 701c Kojime 1 ♪ lens 704a, 704b, 704c The 1, the 2nd dichroic mirror 705a, 70 5b Beam expander. 702 and optical integrator 703 and projection lens 710 and liquid crystal A, ° Nenole 71
0013[0008] A dichroic mirror laminates a multilayer film on a glass substrate, and penetrates it with a wavelength here. A rate is changed. Figure It is shown in 15. Dacroy of The 1 of two-dimensional image display device 700 Duck Miller 705a, What reflects the light of short wavelength and passes only the light of long wavelength from the wavelength bordering on the wavelength of about 580 nm, dichroic mirror 705b of The 2, and about 490 nm Bordering on a wavelength, from the wavelength, the light of short wavelength is reflected and only the light of long wavelength is passed. It is.
0014[0009] Such a conventional laser light source was used. With two-dimensional image display device 700, First, outgoing radiation light from red, green, blue laser light source 701a, 701b, and 701c, It collimates by collimate lens 704a, 704b, and 704c, and is dichroic mirror 70 of The 1 and The 2 about the collimated light. 5a and 705b, Beam after considering it as the coaxial beam which is mutually parallel and spreads the same Optical path Expander 702 is entered. And after being expanded in the light which entered into the beam expander 702, and beam expander 702, optical integrator 703 is passed. A rectangular element lens the above-mentioned optical integrator 703 Two fly eye lenses 703a and 703b array-ized in the shape of two dimensions, It has collimate lens 703c and is one sheet. The light on each element lens of fly eye lens 703a of eyes, the 2nd fly eye lens 7 03b being imaged on a two-dimensional spatial-light-modulation element -- this -- each element lens Upper light intensity distribution it will be multiplexed on a two-dimensional spatial-light-modulation element -- two-dimensional space The light intensity distribution on an optical modulator becomes uniform.
0015[0010] And image the light which passes the above-mentioned optical integrator 703 and by which light intensity distribution was made uniform on liquid crystal panel 71 with projection lens 710.
0016Patent documents 1: Provisional Publication No. 10 - No. 293268 gazette
0017The indication of an invention
0018Object of the Invention
0019[0011] such -- a figure -- expanding like 13 the light emitted from each laser light source 601a 601c by beam expander 602a 602c optical integrator 603a -- 603b -- the light intensity after being distributed uniformly, rather than it multiplexs with dichroic prism 609 and making it a coaxial beam -- a figure -- 14 -- like About the light emitted from each laser light source 701a 701c, it is Da of The 1 and The 2 first. After multiplexing by Iconic mirror 705a and 705b and making it a coaxial beam, beam expander 7 it expands by 02 and uniform in the light intensity distribution at optical integrator 703 -- the bottom -- way power Two-dimensional picture The apparatus scale of the whole display is reducible.
0020[0012] however, the former a two-dimensional image display device -- the optical system whole -- a figure -- as shown in 14, even if it constitutes, in order to carry in compact apparatus, such as a mobile phone, there are still many parts -- carrying out -- Equipment size also has the subject that it is large.
0021[0013] Small size using [ are made in order that the present invention may solve the above-mentioned subject, and ] the micro light equipment which can be carried in a compact apparatus, and the light equipment A two-dimensional image display device is provided. It aims at carrying out.
0022Means for solving problem In order to solve the [0014] above-mentioned subjects, it is light equipment of the present invention, At least two coherent light Each light emitted from a source and the at least two coherent light sources spreads the same Optical path. The diffraction part which diffracts the light to which a way and at least one coherent light source power were also emitted is provided. It carries out.
0023[0015] It can be made by this to multiplex simply each light emitted from a plurality of coherent light sources in the diffraction part, and light equipment can be microminiaturized.
0024[0016] Propagation Optical path of each light to which the light equipment of the present invention was emitted from at least two above-mentioned coherent light sources overlap mutually on the above-mentioned diffraction part.
0025This becomes possible to further miniaturize the light equipment concerned.
0026[0017] The central axis of propagation Optical path of each light by which the light equipment of the present invention was emitted from at least two above-mentioned coherent light sources crosses at one on the above-mentioned diffraction part.
0027This becomes possible to further miniaturize the light equipment concerned.
0028[0018] The light equipment of the present invention is installed on the submount with at least two above-mentioned, same coherent light sources.
0029[0019] Thereby, heat can be radiated in three light sources by heat dissipation of submount of one sheet, and it is [ this ]. It is effective in heat dissipation of the light source in the light equipment being realizable by easy composition.
0030[0020] The light equipment of the present invention is a coherent light source in which the above-mentioned coherent light source emits light in red light, a coherent light source which emits light in green light, and a coherent light source which emits light in blue light.
0031Thereby, the small light equipment which turns on the light of RGB can be provided.
0032[0021] The light to which the above-mentioned diffraction part is emitted from at least one coherent light source among the above-mentioned coherent light sources shall pass the light equipment of the present invention, without diffracting in the diffraction part.
0033[0022] Thereby, since the making processes of a diffraction part are reducible, the light equipment concerned can be provided more cheaply.
0034[0023] The light equipment of the present invention is the above-mentioned diffraction part, It comprises one diffraction element and is the above-mentioned diffraction element, Each light emitted from the at least two coherent light sources is an intermediary about the same Optical path. The thing which is what diffracts the light emitted from at least one coherent light source and for which the above-mentioned diffraction part is carried out out of a party, and the light equipment concerned is microminiaturized by this is good so that Carrying may be carried out. It becomes ability.
0035[0024] Furthermore, as for the light equipment of the present invention, the above-mentioned diffraction element is further provided with a lens operation.
0036[0025] each light emitted from a plurality of above-mentioned coherent light sources by this -- the above-mentioned diffraction element -- the upper -- It can irradiate with the same plane field of a way.
0037[0026] the light equipment of the present invention -- the above-mentioned diffraction part -- euphotic -- even if small [ the bottom ], two lights spread the same Optical path -- as Among the diffraction element of The 1 which diffracts the at least one light which received light, and at least two above-mentioned coherent light sources, Above-mentioned The 1 diffracts [ the central axis of propagation Optical path of the light from this each coherent light source ] the light emitted from at least one coherent light source. The diffraction element of The 2 diffracted so that it may cross at one on an element, and power It constitutes.
0038[0027] The small light equipment makes a coaxial beam simply each light from a plurality of above-mentioned coherent light sources in the above-mentioned diffraction part, and it can multiplex [ light equipment ] by this can be provided more cheaply.
0039[0028] Furthermore, it is light equipment of the present invention, Each light which the diffraction element of above-mentioned The 2 was further provided with the lens operation, and the diffraction element of above-mentioned The 2 condensed each light emitted from at least two above-mentioned coherent light sources, and was diffracted with the diffraction element of this The 2 is the same field of the diffraction element of above-mentioned The 1. It is made to glare.
0040[0029] Thereby, each light emitted from a plurality of above-mentioned coherent light sources is the diffraction matter of above-mentioned The 2. It can irradiate with the same field of the diffraction element of The 1 provided above the child.
0041[0030] Furthermore, the above-mentioned diffraction element of the light equipment of the present invention is a volume hologram, the volume hologram receives each light emitted from at least two above-mentioned coherent light sources, and a plurality of grating to which the propagation direction of each of this light is changed is multiplexed.
0042[0031] Microminiaturization of the light equipment makes a coaxial beam simply each light from a plurality of above-mentioned coherent light sources in a diffraction part, and it multiplexs [ light equipment ] by this is realizable.
0043[0032] Furthermore, each light by which field division of the above-mentioned diffraction element is carried out, and the light equipment of the present invention was diffracted in each division field of the diffraction element irradiates with the same plane field. [0033] This becomes possible to make the above-mentioned diffraction element have a function of an optical integrator, and it becomes possible to equalize intensity distribution of the light the above-mentioned space is irradiated.
0044[0034] Furthermore, as for the light equipment of the present invention, field division of the above-mentioned diffraction element is carried out at the shape of a lattice.
0045When [ be / making still more nearly equivalent intensity distribution of the light the above-mentioned space is irradiated by this / possible ] To.
0046[0035] Present invention Two-dimensional image display device, Like [ in which each light emitted from at least two coherent light sources and the at least two coherent light sources spreads the same Optical path ], The diffraction part which diffracts the light emitted from at least one coherent light source, and each light which was provided between diffraction part absentminded, was diffracted in the diffraction part, and was made into the coaxial beam are received. Two-dimensional spatial-light-modulation matter A child is provided.
0047[0036] this displays the light emitted from light equipment thing power S a two-dimensional image display device is miniaturized -- it can do.
0048[0037] Present invention Two-dimensional image display device, Motion of at least two above-mentioned coherent light sources It has a control part which controls Work and they are at least two above-mentioned coherent light sources, It is a coherent light source which emits light in red light, a coherent light source which emits light in green light, and a Coffee 1 Lent light source which emits light in blue light, and controls the above-mentioned control part to carry out temporal decomposition of the three coherent light sources, and to emit light one by one.
0049[0038] thereby -- being concerned -- The display also of video is attained in a two-dimensional image display device.
EFFECT OF THE INVENTION
0051[0039] In the light equipment which has a plurality of coherent light sources according to the light equipment of the present invention, it is the above-mentioned coherent light source power. Diffraction which diffracts each emitted light so that the same Optical path may be spread Since it had the part, It is Synthesis so that it may become a coaxial beam about each light from a plurality of above-mentioned coherent light sources. It is good to be able to carry out the optical system which carries out a wave out of a party, and to provide micro light equipment. It becomes ability.
0052[0040] Light which is emitted from at least one coherent light source among a plurality of above-mentioned coherent light sources according to the light equipment of the present invention, Since it was made to diffract and pass in the above-mentioned diffraction part, the number of grating multiplexed in the above-mentioned diffraction part can be lessened, and it becomes possible to constitute the light equipment concerned cheaply.
0053[0041] According to the light equipment of the present invention, two diffraction gratings, The 1 and The 2, constitute a diffraction part, and it is The.<sub>2</sub>In Diffraction grating, such lights are The 1 about the light from a plurality of coherent light sources. It shall diffract so that the same field of a diffraction element may be irradiated. Since each light which passed the diffraction element of above-mentioned The 2 for the diffraction grating of The 1 shall be diffracted so that it may become a coaxial beam, it is plurality. Small light equipment it can multiplex [ light equipment ] so that it may become a coaxial beam simply about the light from a light source It becomes possible to provide.
0054[0042] Since a plurality of above-mentioned coherent light sources were provided on the same submount according to the light equipment of the present invention, it is effective in the ability for heat dissipation of submount of one sheet to perform heat dissipation of a plurality of light sources, and perform heat dissipation processing in light equipment easily.
0055[0043] According to the light equipment of the present invention, field division of the above-mentioned diffraction part should be carried out, and multiplex formation of a plurality of grating should be carried out in each division field of the diffraction part, and it should have the concave lens operation. It is that of It was, making simply into a coaxial beam each light emitted from a plurality of above-mentioned coherent light sources It comes out to make uniform intensity distribution of the light emitted from the diffraction part in addition to the ability to multiplex. It cuts. Optical integrator which makes uniform intensity distribution of the light emitted from the diffraction part It compares with the conventional lens array and the diffraction part which it has is a profit about what [ small and ] is cheap into material. Since for is possible, light equipment is cheaply realizable.
0056[0044] Present invention Since light equipment was made into the miniaturized thing using a diffraction element according to the two-dimensional image display device, it becomes possible to miniaturize a two-dimensional image display device.
0057[0045] Furthermore, it is the present invention. Since the diffraction part of the above-mentioned light equipment has the function of an optical integrator according to the two-dimensional image display device, conventionally required for equalization of light intensity distribution -- Buddy Even if it does not use a It was fly eye lens, the output light of light equipment becomes a uniform thing of intensity distribution, and the intensity distribution of and light source light is uniform. while being able to miniaturize a two-dimensional image display device more -- this the -- The number of component parts of a two-dimensional image display device is also reducible. As a result, the intensity distribution of light source light It is uniform. A two-dimensional image display device is made with a thing easy [ an assembly ] and cheap.
0058Brief explanation of the drawings
0059[0046] [Drawing 1] Side view (figure (a)) And which shows the composition of the light equipment which requires Drawing 1 for embodiment of the invention 1 It is Plan view (figure (b)). Garden 2] figure 2 is a figure showing the manufacturing method of the diffraction part concerning embodiment of the invention 1, and it shows the making process (figure (a) and a figure (b) and a figure (c)) of grating which diffracts the outgoing radiation light of green , blue, and a red laser light source.
0060Garden 3] figure 3 is the side view (figure (a)) and top view (figure (b)) showing another composition of the light equipment concerning embodiment of the invention 1.
0061The side which shows another composition of the light equipment which requires garden 4] figure 4 for embodiment of the invention 1 They are a figure (figure (a)) and a top view (figure (b)).
0062Side view (figure (a)) And which shows the composition of the light equipment which requires garden 5] figure 5 for embodiment of the invention 2 It is Plan view (figure (b)).
0063Method of production of the volume hologram of The 2 of the diffraction part which requires garden 6] figure 6 for embodiment of the invention 2 Grating which is a figure showing a method and diffracts the outgoing radiation light of green, blue, and a red laser light source The making process (figure (a) and a figure (b) and a figure (c)) is shown.
0064Method of production of the volume hologram of The 1 of the diffraction part which requires garden 7] figure 7 for embodiment of the invention 2 Grating which is a figure showing a method and diffracts the outgoing radiation light of green, blue, and a red laser light source The making process (figure (a) and a figure (b) and a figure (c)) is shown.
0065Side view (figure (a)) And which shows the composition of the light equipment which requires garden 8] figure 8 for embodiment of the invention 3 It is Plan view (figure (b)).
0066a garden 9] figure -- grating for the green light of the diffraction part which requires 9 for embodiment of the invention 3 it is a figure showing a formation method -- the processing (figure (a) -- figure (d)) which carries out interference exposure of the four division fields on a par with one row is shown.
0067a garden 10] figure -- grating for the blue lights of the diffraction part which requires 10 for embodiment of the invention 3 it is a figure showing a formation method -- the processing (figure (a) 1 figure (d)) which carries out interference exposure of the four division fields on a par with one row is shown.
0068a garden 11] figure -- grating for the red lights of the diffraction part which requires 11 for embodiment of the invention 3 it is a figure showing a formation method -- the processing (figure (a) 1 figure (d)) which carries out interference exposure of the four division fields on a par with one row is shown.
0069Garden 12] figure 12 starts embodiment of the invention 4. Figure showing the composition of a two-dimensional image display device It is. Garden 13] figure 13 is the former. It is a figure showing one example of composition of a two-dimensional image display device. Garden 14] figure 14 is the former. It is a figure showing another example of composition of a two-dimensional image display device.
0070Explanations of letters or numerals
007110, 10a, 10b, 10c subMung ♪
00721 1 a, L Ib, and 1 1 C, 21a, 21B, 21 C, 601a, 601B, 601 C, 701a, 701B, 701C 1 the Light Source
007312a, 12b, 12c prism
007432 Division Field
007532a, 32b, 32c grating
007620, 220, a 320 times folded part
0077221 Volume Hologram of The 1
0078222 Volume Hologram of The 2
0079222a, 222b, 222c grating
008030, 607a, 607b, 607c, a 707 spatial-light-modulation element
008151 61 Screen
008271 Liquid Crystal Panel
0083100, 100a, 100b, 200, 300 light equipment
0084500, 600, a 700 two-dimensional image display device
0085510, a 710 projection lens
0086520 Control Part
0087530 Picture Signal Switching Part
0088540 Laser Switching Part
0089550a, 550b, 550c laser Oto ward * B
0090560, 608a, 608b, a 608c phi Noredo lens
0091602a, 602b, a 602c beam expander
0092603a, 603b, a 603c light integrator
0093604a, a 604c mirror
0094605a, 605b, 605c diffusion board swing means 606a, 606b, 606c diffusion board
0095609 Tha" Iconic Prism
0096610 Projection Lens
0097704a, 704b, a 704c Collimation 1 ♪ lens
0098705a, a 705b dichroic mirror
0099The best form for inventing
0100[0048] Hereinafter, describe each embodiment of the present invention.
0101[0049] (Embodiment 1)
0102Three which emits red and a blue and green light with the diffraction element of one sheet at this Embodiment 1 The light emitted from a coherent light source is diffracted so that it may become a coaxial beam, and it is To multiplex about this each light. Light source device is explained. in addition -- in the following explanation -- "a coaxial beam" -- said -- Also as which what means the light which spreads the Kazumitsu way, and a "optic axis" mean the central axis of an optical propagation way When -- it carries out.
0103[0050] a figure -- 1 is a figure showing the composition of the light equipment concerning this Embodiment 1 -- a figure -- (a) shows a side view and a figure (b) shows a top view.
0104[0051] a figure -- it sets to 1 -- 100 is light equipment Of this Embodiment 1, and is used as a light source of the light equipment 100 and a two-dimensional image display device. This light equipment 100 is provided with the following. Red light, blue light, and green light are emitted a coherent light source and here. Three semiconductor lasers (a "Les 1 the light source" is only called hereafter.) 1 1a -- 11c The laser light source. 11a -- Submount in which 11c is mounted directly and which is a silicon substrate etc. 10 Light equipment 100 is provided with the following. the submount being provided above 10 -- at least -- One coherent light source and here light emitted from two laser light source l la, l ib, and 11c -- the -- Diffraction part diffracted so that light of All emitted from three coherent light sources may become a coaxial beam 20 the above-mentioned submount 10 tops -- Establishment being kicked -- the above Three laser light sources the light emitted from 11a, l ib, and 11c -- the above-mentioned diffraction part 20 it irradiates with the same field -- as Laser light source. Outgoing radiation light from 11a, l ib, and 11c is reflected. Prism 12a, 12b, 12c And above the above-mentioned diffraction part 20, it is the diffraction. Spatial-light-modulation element 30 to which the amplitude of each light made into the coaxial beam in part 20 is changed spatially is provided. [0052] each above-mentioned laser light source 11a -- 11c being end face luminescence laser, and arranging laser light sources 11a and 11c of red light and green light on one straight line -- laser light source l ib of blue light -- being the above-mentioned -- direct It arranges on the straight line which intersects perpendicularly with a line. The reflective surface of the above-mentioned prism 12a, 12b, and 12c, Figure Appearance from above-mentioned laser light source l la reflected in the reflective surface as shown in 1, l ib, and 11c The optic axis of light reflection and the optic axis of Hikaru Idei from laser light source l ib are one on the above-mentioned diffraction part 20. The degree of angle of reflection is set up to cross.
0105[0053] At this Embodiment 1, diffraction part 20 is :! It comprises a volume hologram of Sheet. And in the volume hologram, it is each above-mentioned laser light source 11a. -- Multiplex formation of a plurality of grating which diffracts each light emitted from 11c, and it makes into a coaxial beam is carried out. each light in which the volume hologram of this Embodiment 1 passed the diffraction part 20 -- the upper part of the diffraction part 20 -- providing -- Lens which condenses each above-mentioned light so that it may irradiate with the same field of Was done spatial-light-modulation element 30 It also has an operation.
0106[0054] Hereinafter, explain the manufacturing method of diffraction part 20 of this Embodiment 1.
0107[0055] a figure -- 2 is a figure showing the manufacturing method of the volume hologram Of this Embodiment 1 Figure Formation method of grating for lights with which 2 (a) is emitted from laser light source 11c of green light, a figure -- 2 (b) the formation method of grating for lights emitted from laser light source l ib of blue light, and a figure -- the formation method of grating for lights with which 2 (c) is emitted from laser light source 11a of red light -- it Each is carried out.
0108[0056] For example, laser light source 1 of green light Laser light source 11c of the above-mentioned green light, light source Lgl of the same wavelength, and light source Lg2 are used for formation of grating corresponding to the outgoing radiation light from 1c. That of This Coming, light source Lgl and Lg2 emit the laser beam which the same light source power also occurred and was further divided. It is a thing. For example, the light from one laser light source is introduced in an optical fiber, and also it is Fa. It may divide into two fibers by Ivy cattail, and may arrange the outgoing radiation end face of these two fibers in the position of Lgl and Lg 2. light source Lgl receives volume hologram 20 -- optical a position -- a figure -- arranging so that it may be in agreement with laser light source 11c shown in 1 (a) and (b) -- light source Lg2 -- time It is arrangement to the projection center which projects the light emission plane of fire of folded part 20 all over the acceptance surface of spatial-light-modulation element 30. It carries out. According to this Embodiment 1, spatial-light-modulation element 30 is located right above diffraction part 20. It is that of To and arranges light source Lg2 on a straight line perpendicular to the light emission plane of fire of diffraction part 20 (refer to figure 2 (a)). And which carries out interference exposure of the above-mentioned volume hologram by the light source Lgl and the outgoing radiation light from Lg2. Thereby, interference fringes are recorded on the volume hologram, and it is the appearance from the above-mentioned laser light source 11c. (Bragg) Bragg grating which diffracts and condenses light reflection is formed.
0109[0057] Use light source Lbl of the same wavelength as laser light source l ib of the above-mentioned blue light, and light source Lb2 for formation of grating corresponding to the outgoing radiation light from laser light source l ib of blue light. At this time, it is light. Source Lbl and Lb2 emit the laser beam which occurred from the same light source and was further divided. It is. For example, the light from one laser light source is introduced in an optical fiber, and also it is fiber power. It divides into two fibers by Zabra, and at least that of Lbl and Lb2 is about the outgoing radiation end face of these two fibers. It may arrange to Place. optical position [ as opposed to volume hologram 20 in light source Lbl ] a figure -- arranging so that it may be in agreement with laser light source l ib shown in 1 -- light source Lb2 -- the above-mentioned light source Lg2 It arranges in the same position (refer to figure 2 (b)). And it is a front by the light source Lbl and the outgoing radiation light from Lb2. Interference exposure of the account volume hologram is carried out. Thereby, it is further an account about interference fringes to the volume hologram. It records and forms Bragg grating which condenses the outgoing radiation light from above-mentioned laser light source l ib. It carries out.
0110[0058] Use laser light source 11a of the above-mentioned red light, light source Lrl of the same wavelength, and light source Lr2 for formation of grating corresponding to the outgoing radiation light from laser light source 11a of red light. At this time, it is light. Source Lrl and Lr2 emit the laser beam which occurred from the same light source and was further divided. It is. For example, the light from one laser light source is introduced in an optical fiber, and also it is fiber power. It divides into two fibers by Zabra, and at least that of Lrl and Lr2 is about the outgoing radiation end face of these two fibers. It may arrange to Place. optical position and a figure -- arranging so that it may be in agreement with laser light source 11a shown in 1 -- light source Lr2 -- the above-mentioned light source Lg2 It arranges in the same position (refer to Drawing 2 (c)). [ as opposed to volume hologram 20 in light source Lrl ] And it is the body by the light source Lrl and the outgoing radiation light from Lr2. Interference exposure of the product hologram is carried out. This records interference fringes on the volume hologram further. The and Bragg grating which diffracts and condenses the outgoing radiation light from the above-mentioned laser light source 11a It forms.
0111[0059] In addition, it is interference exposure of the above-mentioned volume hologram, It is necessary to carry out 3 times so that grating to each outgoing radiation light of three laser light sources may be formed in one volume hologram, and for this reason, a photosensitive material which constitutes a volume hologram is performing each interference exposure with the light intensity of the grade completely exposed by three exposure.
0112[0060] Explain a operation effect below.
0113The red light, blue light, green light which were provided on submount 10 in the above-mentioned light equipment 100 If light is emitted from laser light source 11a 11c, The three laser light source l la, l ib, 11c power Outgoing radiation light is the subMaung so that the optic axis of each outgoing radiation light may cross at one on diffraction part 20. A] on ♪ 10; it is reflected by Tension 12a, 12b, and 12c.
0114[0061] And each laser light source l la, l ib, the red from 11c, and a blue and green laser beam, diffraction grating corresponding [ on part 20 and ] to each light -- a figure -- as shown in 1, it is multiplexed so that it may become a coaxial beam, and it irradiates, the same field, i.e., the optical acceptance surface, of the above-mentioned spatial-light-modulation element 30. That is, the outgoing radiation lights from laser light source 11a of the red light reflected by the prism, blue light, and green light, l ib, and 11c are diffraction and condensing, respectively, when passing the diffraction part 20. It is carried out. This irradiates with the light which multiplexed the outgoing radiation light of three laser light sources from diffraction part 20, and the optical acceptance surface which is the fixed fields of the above-mentioned spatial-light-modulation element 30.
0115[0062] As mentioned above, according to this Embodiment 1, it sets to light equipment, three laser light source 11 a -- 11c and laser light source 11a -- it multiplexs so that these may serve as a coaxial beam in the outgoing radiation light from 11c -- since it had diffraction part 20 which consists of a volume hologram of one sheet The optical system which changes the outgoing radiation light from three laser light sources into a coaxial beam can be miniaturized, and this carries. Super-small size which can be carried in compact apparatus, such as a telephone A two-dimensional image display device is realized. It can do.
0116[0063] since three light sources are arranged on same submount 10, when it becomes possible to radiate heat by heat dissipation of submount 10 of one sheet in the three light sources and heat dissipation processing of the light source in the light equipment concerned can be performed easily, Les and obtain and it is effective.
0117[0064] In this Embodiment 1, three light sources 11a -- the laser of end face luminescence to 11 c -- business -- arrangement of power S which arranges the laser of Les and blue light on the straight line which connects the laser of green light and the laser of red light, and the straight line which intersects perpendicularly, and a laser light source is not restricted to this.
0118[0065] For example, it is OK, even if a surface emission-type laser is used for the laser of blue light and it arranges this between the laser of green light, and the laser of red light. a figure -- 3 (a) and (b) are the side views and top views of light equipment 100a showing light equipment 100a of such composition -- the figure in Drawing 3 -- the same numerals as 1 (a) and (b) show the same thing as the thing in light equipment 100.
0119[0066] In this case, the number of the prisms installed on submount 10 can be reduced, and it is the light source concerned. It becomes possible to make device 100 cheap.
0120[0067] In this Embodiment 1, Power which provided the semiconductor laser chip which is a laser light source in same submount 10 Like light equipment 100b shown in Drawing 4 (a) and (b), a laser light source is also Mounted to respectively separate submount 10a 10c about a semiconductor laser chip. That is also OK. a figure -- 4 (a) and a figure -- 4 (b) is the side view and top view of light equipment 100b -- the figure in and Drawing 4 -- the thing as the thing in light equipment 100 with the same, same numerals as 1 (a) and (b) -- Show It is carrying out.
0121[0068] The semiconductor laser chip as three light sources is mounted to respectively separate submount 10a 10c in this way, the flexibility of the layout of the three light sources becomes large -- it is effective in the ability to do with what is easy to design the light equipment in a compact apparatus.
0122[0069] It will be a time if the light which passed power diffraction part 20 furthermore explained by this Embodiment 1 that diffraction part 20 had a condenser operation is settled in the field of spatial-light-modulation element 30. It is not necessary to make each light condense by folded part 20. in this case, the above-mentioned volume hologram -- laser It was it becomes unnecessary to form grating which makes the light emitted from light source lib condense Because -- the making process of the above-mentioned volume hologram can be reduced -- the device concerned -- more -- cheap -- offer thing power S it carries out -- it can do.
0123[0070] It is OK, if a light source is at least two or more although the case where the number of coherent light sources was three was mentioned as the example and explained in this Embodiment 1. For example, they are 4 Tsu following about a coherent light source. If lights, such as blue-green or yellow, are provided in addition to red light, blue light, and green light when a top provides, the light source which can express the vivid color of the wider range can be provided.
0124[0071] With this Embodiment 1, It is used as a light source of light equipment and a two-dimensional image display device, and spatial-light-modulation element 30 is, changing the amplitude of the light from diffraction part 20 spatially To -- As -- power carried out Light equipment of this embodiment, Light source of a two-dimensional image display device It restricts. Spatial-light-modulation elements other than a two-dimensional image display device are from diffraction part 20. It can use also as a light source of the device which is that to which the phase of light is changed spatially. [0072] (embodiment 2)
0125the case where it comprises a diffraction element of diffraction part power^Sheet in the above-mentioned Embodiment 1 -- just -- Place where the above-mentioned diffraction part comprises a diffraction element of two sheets by this Embodiment 2 although Explanation was carried out Synthesis is explained.
0126[0073] Explain the composition of the light equipment concerning this Embodiment 2 first. a figure -- 5 is a figure showing the composition of the light equipment concerning this Embodiment 2 -- a figure -- 5 (a) -- a side view and a figure -- 5 (b) -- a top view -- To indicate.
0127[0074] figure, it sets to 5 -- 200 -- this embodiment it is light equipment of 2 -- this light equipment 200 is provided with the following. Thilly Submount of the Cong board etc. 10 The submount Each of red light provided on ten, blue light, and green light is emitted. Three semiconductor laser light sources (it is only a laser light source hereafter [ It calls. ]) 21a 21c The submount. It is provided above 10 and describes above. Three laser light sources 2 la -- Diffraction part which diffracts each light emitted from 21c, and it makes into a coaxial beam 220 Vibration of the light which carried out and was made into the coaxial beam in the diffraction part 220 above the diffraction part 220 Spatial-light-modulation element 30 to which width is changed spatially is provided.
0128[0075] Here, they are the three above-mentioned laser light sources 21a. -- 21c is a surface emission-type laser which emits light from the upper surface of a laser chip, and these are arranged along one straight line on the above-mentioned submount 10.
0129[0076] and -- this Embodiment 2 -- diffraction part 220 -- the volume hologram (volume hologram of The 1 and The 2) of two sheets -- it comprises 221 and 222.
0130[0077] Volume hologram 222 of above-mentioned The 2, Volume Ho of The 1 which was provided above the above-mentioned submount 10, and was able to provide further each outgoing radiation light from laser light source 21a 21c of the above-mentioned 3 One up On log rum 221, It diffracts so that the optic axis of each of this outgoing radiation light may cross at one point, and it is this each appearance. Light reflection is condensed so that it may irradiate with the same field of the 1st volume hologram 221. In therefore, volume hologram 222 of above-mentioned The 2, each above-mentioned laser light source 21a -- Outgoing radiation from 21c each light carried out irradiates with the same field of the 1st volume hologram 221 -- as It is Response to this each light. On grating of Did do plurality, and a concrete target, grating 222a for red lights, and object for blue lights Grating 222b and grating 222c for green light are formed, respectively. [0078] -- and Volume hologram 221 of above-mentioned The 1 is diffracted by volume hologram 222 of each above-mentioned The 2. The outgoing radiation light from each light source carried out is further diffracted, and it is made a coaxial beam. therefore, to volume hologram 221 of and above-mentioned The 1, volume hologram 222 of above-mentioned The 2 was passed -- each -- a plurality of grating diffracted so that the outgoing radiation light from a light source may become a coaxial beam -- multiplex It is formed.
0131[0079] , narrowing the arrangement interval of above-mentioned light source 21a 21c in this Embodiment 2, in addition, since the light equipment 200 concerned is further miniaturized -- a figure -- it is shown in 5 -- as -- from this each light source -- outgoing radiation -- He is trying for The light to overlap on volume hologram 222 of The 2. therefore, volume of The 2 in hologram 222 -- the object for red lights, the object for blue lights, and grating 222a1 for green light -- 222c is formed in piles partially.
0132[0080] Hereinafter, explain the manufacturing method of diffraction part 220 of this Embodiment 2.
0133[0081] a figure -- 6 is a figure showing the manufacturing method of the volume hologram of The 2 Of this Embodiment 2 Drawing 6 (a) -- the grating formation method for green light -- a figure -- 6 (b) -- the grating formation method for blue lights -- a figure -- 6 (c) shows the grating formation method for red lights. a figure -- 7 is a figure showing the manufacturing method of the volume hologram of The 1 of this Embodiment 2 a figure -- 7 (a) -- object for green light the formation method of grating -- a figure -- 7 (b) -- the formation method of grating for blue lights -- a figure -- 7 (c) shows the formation method of grating for red lights.
0134[0082] Explain the manufacturing method of volume hologram 222 of The 2 first.
0135The 2nd volume hologram 222 is each light source 21a. -- Optic-axis power of Hikaru Idei from 21c The body of The 1 It diffracts so that it may cross at one point on product hologram 221, and this each outgoing radiation light is the volume of The 1. It condenses so that it may irradiate with the same field of hologram 221.
0136[0083] For example, use laser light source 21c of the above-mentioned green light, light source Lgl of the same wavelength, and light source Lg2 for formation of grating corresponding to the outgoing radiation light from laser light source 21c of green light. this -- the time -- light source power in which light source Lgl and Lg2 are the same The laser beam which occurred and was further divided is emitted. It is a thing. For example, the light from one laser light source is introduced in an optical fiber, and also it is Fa. It may divide into two fibers by Ivy cattail, and may arrange the outgoing radiation end face of these two fibers in the position of Lgl and Lg 2. Optics [ here as opposed to volume hologram 222 in light source Lgl ] A position [-like ] arranges so that it may be in agreement with laser light source 21c shown in Drawing 5 (a) and (b), and light source Lg2 is, The field with which the outgoing radiation light from light source Lgl in volume hologram 222 of The 2 irradiates is arranged focusing on the projection which carries out expansion projection all over volume hologram of The 1 221 (refer to figure 6 (a)). That Carry out and it is interference dew about volume hologram 222 of above-mentioned The 2 by the light source Lgl and the outgoing radiation light from Lg2. Light is carried out. Thereby, interference fringes are recorded on the 2nd volume hologram 222, and it is the above-mentioned laser beam. Bragg grating 222c which diffracts and condenses the outgoing radiation light from source 21c is formed. And fields other than the field exposed in the case of this interference exposure were equivalent to the division field. It is made to shade with the shading mask which has an aperture of shape.
0137[0084] Use laser light source 21b of the above-mentioned blue light, light source Lbl of the same wavelength, and light source Lb2 for formation of grating to the outgoing radiation light from laser light source 21b of blue light. which is what emits the laser beam which light source L bl and Lb2 occurred from the same light source at this time, and was further divided. For example, the light from one laser light source is introduced in an optical fiber, and also it is a fiber cup. It divides into two fibers by La, and is in the position of Lbl and Lb2 about the outgoing radiation end face of these two fibers. It may arrange. here, light source Lbl receives volume hologram 222 of The 2 -- optical Position, Figure Arranging so that it may be in agreement with laser light source 21b shown in 5 (a) and (b), light source Lb2 is, It is the body of The 1 about the field with which the outgoing radiation light from light source Lbl in volume hologram 222 of The 2 irradiates. It arranges focusing on the projection which carries out expansion projection all over product hologram 221 (refer to figure 6 (b)). And which carries out interference exposure of the volume hologram 222 of above-mentioned The 2 by the light source Lbl and the outgoing radiation light from Lb2. Thereby, interference fringes are recorded on volume hologram 222 of this The 2, and Bragg grating 222b which diffracts and condenses the outgoing radiation light of the above-mentioned laser light source 21b power is formed. And shape corresponding to a division field in fields other than the field exposed in the case of this interference exposure It is made to shade with the shading mask which has an aperture.
0138[0085] Use laser light source 21a of the above-mentioned red light, light source Lrl of the same wavelength, and light source Lr2 for formation of grating corresponding to the outgoing radiation light from laser light source 21a of red light. At this time, light source Lrl and Lr2 emit the laser beam which occurred from the same light source and was further divided, and they are Ah. To. For example, the light from one laser light source is introduced in an optical fiber, and also it is a fiber cutlet. A bra divides into two fibers and it is a position of Lrl and Lr2 about the outgoing radiation end face of these two fibers. It may arrange. Optical position [ here as opposed to volume hologram 222 in light source Lrl ] Power Arranging so that it may be in agreement with laser light source 21a shown in Drawing 5 (a) and (b), light source Lr2 is, The 2 It is volume Ho of The 1 about the field with which the outgoing radiation light from light source Lrl in volume hologram 222 irradiates. It arranges focusing on the projection which carries out expansion projection all over log rum 221. the light source Lrl and Lr2 , -- interference exposure of the volume hologram 222 of above-mentioned The 2 is carried out by outgoing radiation light. [ and ] Thereby, interference fringes are recorded on volume hologram 222 of this The 2, and it is a time about the outgoing radiation light from the above-mentioned laser light source 21a. A chip box and condensing Bragg grating 222a are formed. and the time of this interference exposure To -- fields other than the field to expose have an aperture of the shape corresponding to a division field It is made to shade with a shading mask.
0139[0086] In addition at this Embodiment 2, it is, About each light source, the outgoing radiation light is volume hologram 222 of The 2. In volume Jolo Durham 222 of The 2 produced since it was made to approach and arranged so that it may overlap partially in a top, It is partially Heavy in adjoining Bragg grating 222a, Bragg grating 222b and adjoining Bragg grating 222b, and Bragg grating 222c. Intermediary To have.
0140[0087] Next, explain the manufacturing method of volume hologram 221 of The 1.
0141each light source 21a1 in which the 1st volume hologram 221 passed volume hologram 222 of above-mentioned The 2 -- the outgoing radiation light from 21c is diffracted and condensed so that it may become coaxial light.
0142[0088] formation of grating corresponding to the outgoing radiation light from laser light source 21c of green light -- a figure -- as shown in 7 (a), use lens Lc, and the light source Lg2 [ same ] as laser light source 21c of the above-mentioned green light of a wavelength and light source Lg3. At this time, light source Lg2 and Lg3 occur from the same light source. The further divided laser beam is emitted. For example, light from one laser light source It introduces in an optical fiber, and also a fiber cutlet bra divides into two fibers, and they are them 2. The outgoing radiation end face of the fiber of a book may be arranged in the position of Lg2 and Lg3. here, as for lens Lc, this enters the volume hologram of The 1 as a parallel light in and the emission light from light source Lg3 -- as -- It condenses. Gray Tin [ in / in light source Lg2 / volume hologram 222 of The 2 ] Under the projection which carries out expansion projection of the field in which A 222c was formed all over volume hologram of The 1 221 It arranges to the heart. And it is volume Holog of above-mentioned The 1 by the outgoing radiation light from light source Lg2 and Lg3. Interference exposure of the rum 221 is carried out. This records interference fringes on volume hologram 221 of this The 1. The, Bragg grating which diffracts the outgoing radiation light from the above-mentioned laser light source 21c is formed [0089] -- such interference exposure of volume hologram 221 of The 1 -- a figure -- it is shown in 7 (b) -- as a figure -- 7 (a) transposing shown light source Lgl and Lg2 to the light source Lb2 [ same ] as laser light source 21b of blue light of a wavelength, and light source Lb3 -- line Les -- further -- a figure -- it is shown in 7 (c) -- as Figure He is red about light source Lgl shown in 7 (a), and Lg2. It carries out by transposing to the light source Lr2 [ same ] as laser light source 21a of colored light of a wavelength, and light source Lr3. Thereby, it is the outgoing radiation light and red light from laser light source 21b of blue light to volume hologram 221 of and The 1. About grating which diffracts each outgoing radiation light from laser light source 21a, it is Les of green light. Multiplex is carried out to Bragg grating to 1 the light source 21c, and it forms. At this time, a light source is carried out and b2 can be set to volume hologram 222 of The 2, Arranging the field in which grating 222b was formed focusing on the projection which carries out expansion projection all over volume hologram of and The 1 221, light source Lr2 is, The field in volume hologram 222 of The 2 in which grating 222a was formed is arranged focusing on the projection which carries out expansion projection all over volume hologram of The 1 221.
0143[0090] In addition, it is interference exposure of the volume hologram of above-mentioned The 1, The photosensitive materials from which each interference exposure constitutes a volume hologram since it is necessary to carry out 3 times so that grating to each outgoing radiation light of three laser light sources may be formed in one volume hologram are three exposure. It carries out with the light intensity of the grade exposed completely.
0144[0091] Explain a operation effect below.
0145First, laser light source 21a of the red light provided on submount 10, blue light, and green light -- A laser beam is emitted from 21c and volume hologram 222 of The 2 of diffraction part 220 is irradiated with this each laser beam.
0146[0092] And each laser light source 21a -- When each light emitted from 21c passes through volume Jolo Durham 222 of above-mentioned The 2, it is diffracted and condensed by the object for red lights, the object for blue lights, and grating 222a 222c for green light, respectively. Thereby, the optic axis of each of this light is volume Ho of above-mentioned The 1. It crosses at one on log rum 221, and is Looking to the same field of volume hologram 221 of this The 1. It puts.
0147[0093] And each light diffracted and condensed by volume hologram 222 of each above-mentioned The 2, the time of passing volume hologram 221 of above-mentioned The 1 -- a figure -- being diffracted and multiplexed so that it may become a coaxial beam which spreads the same Optical path, as shown in 5 (a) -- it is irradiation about the same field of the above-mentioned spatial-light-modulation element 30 It carries out.
0148[0094] As mentioned above, according to this Embodiment 2, it sets to light equipment, Three laser light source 21 a -- 21c and laser light source 21a -- Since it had diffraction part 220 it multiplexs [ part ] so that these may serve as a coaxial beam in the outgoing radiation light from 21c and which consists of volume holograms, It is the super-small size which can be carried in compact apparatus, such as a mobile phone, like Embodiment 1. A two-dimensional image display device is realized. It can do.
0149[0095] In this Embodiment 2, He is two volume Jolo Dara of The 1 and The 2 about diffraction part 220. It reaches Beam 221 and constitutes [ 222 power ], These Hikaru Idei's optic axis is Fellowship in one on volume hologram 221 of above-mentioned The 1 about the outgoing radiation light from three laser light sources by volume hologram 222 of The 2. Method diffraction of To is carried out and it is by volume hologram 221 of The 1, Three from volume hologram 222 of The 2 Since a laser beam is diffracted so that it may irradiate with the same field of spatial-light-modulation element 30, Each light source Power The necessity of coinciding the optic axis of the light which enters into diffraction part 220 on the diffraction part 220 drops off. It is the above-mentioned The about the light source which emits light perpendicularly to submount of a surface emission-type laser etc. It can arrange directly on Bumount 10. As a result, simple in the composition of the light equipment concerned It can do and can also make that assembly easy. This is a rope to the cost reduction of the light equipment concerned. To.
0150[0096] With this Embodiment 2, Three light sources 21a -- The effect that it becomes possible to perform heat dissipation of the three light sources by radiating heat in submount 10 of one sheet since 21c is provided on same submount 10, and can perform heat dissipation processing of a light source easily in the light equipment concerned is also To.
0151[0097] In addition, it sets to this Embodiment 2, Grate which volume hologram 222 of The 2 adjoins Inge 222a -- Power which considered the boundary part of 222c as the composition repeated a little Volume Jolo Durham 222 of above-mentioned The 2 may carry out multiplex formation of the grating for each lights so that the most may overlap. An apparatus scale can be made small if it does in this way.
0152[0098] moreover -- reverse -- volume hologram 222 of above-mentioned The 2 -- grating for each lights -- a pile -- being be -- what was obtained and formed -- OK, if it does in this way, size doesn't hear a little apparatus scale of light equipment Since To can take distance between the light source and light source which are installed on same submount 10, when heat dissipation of a light source can be made efficient, it Les and obtains and is effective. [0099] It is noting that the 2nd volume hologram 222 has a lens operation in this Embodiment 2. Although explained, The irradiation field of the light which passed volume hologram 222 of this The 2 is volume Jolo of The 1. The necessity of making each light condensing by volume hologram 222 of The 2 if settled in the field of gram 221 There is nothing. In in this case, volume hologram 222 of above-mentioned The 2, Only two different grating 222a for diffracting the two above-mentioned laser light sources 21a and the outgoing radiation light from 21c, and 222c In order to carry out multiplex formation, This which reduces the number of grating which carries out multiplex to a volume hologram It can do and can provide the device concerned still more cheaply.
0153[0100] In this Embodiment 2, although the case where the number of coherent light sources was three was mentioned as the example and explained, the light source should just be at least two or more.
0154[0101] (Embodiment 3)
0155The light equipment of this Embodiment 3 is each Les about the diffraction part in the light equipment of Embodiment 1. It serves as the function of the optical integrator which makes uniform light intensity distribution of Hikaru Idei from a 1 the light source. It should have.
0156[0102] a figure -- 8 is a figure showing the composition of the light equipment concerning this Embodiment 3 -- a figure -- 8 (a) -- a side view and a figure -- 8 (b) shows a top view.
0157[0103] Figure, 8 is provided with the following. 300 is this embodiment. It is light equipment concerning 3 and is this light equipment. 300 Embodiment Light equipment of 1 It is a laser light source of red light, blue light, and green light like 100. 11 a, l ib, 11c Laser light source of red light and green light Priss which reflects outgoing radiation light of 11a and 1 lc Beam 12a, 12b, 12c Submount which supports these laser light sources and prisms 10 Prism. Laser light source reflected by 12a, 12b, and 12c Outgoing radiation light of 11a, l ib, and 11c passes. Diffraction part 320 to carry out Here, it is laser light source 11a. -- l lc, prism 12a -- 12c and submount 10 are the same as that of Embodiment 1.
0158[0104] and in this Embodiment 3, the above-mentioned diffraction part 320 equalizes that light intensity distribution while diffracting incidence light -- it comprises a volume hologram of one sheet.
0159[0105] The above-mentioned volume hologram 320 is divided into a plurality of fields, mentions as an example what was divided into 16 here, and explains it.
0160[0106] In the above-mentioned volume hologram 320, 16 division fields 32 are located in a line four rows in all directions. and the outgoing radiation light from above-mentioned light source 11a 11c which entered into each division field 32 to this each field -- This grating diffracted so that Re may illuminate the whole light irradiation side of spatial-light-modulation element 30 -- many -- A pile is carried out and it is formed. Here, each field of volume hologram 320 is Expansion about the emission angle of incidence light. It has the concave lens operation which carries out a large.
0161[0107] Outgoing radiation light from each light source which entered into each division field of such a volume hologram divided into 16, It is a time by grating formed in each 16 field of the volume hologram. While a chip box is carried out and being made a coaxial beam, From each 16 field of the volume hologram Spatial-light-modulation element 30 of each light outputted provided above the above-mentioned diffraction part 320 is the same. It irradiates with a field.
0162[0108] in addition -- a figure -- light mainly emitted from blue light source l ib in 8 (a) in order to simplify a figure Although Optical path is displayed Grate by which the light emitted from red and green light source l la and 11c also entered into each division field of the above-mentioned diffraction part 320, and multiplex formation was similarly carried out to this each division field Inge diffracts, and it is emitted and is To irradiate about the same field of spatial-light-modulation element 30. To.
0163[0109] Hereinafter, explain the manufacturing method of diffraction part 320 of this Embodiment 3.
0164Drawing 9 was emitted to the volume hologram of this Embodiment 3 from the laser light source of green light it is a figure showing how to form grating which diffracts light -- a figure -- 10, form of this operation Grate which diffracts the light emitted to the volume hologram of voice 3 from the laser light source of blue light it is a figure showing how to form Inge -- a figure -- 11, How to form grating which diffracts the light emitted to the volume hologram of this Embodiment 3 from the laser light source of and red light It is a shown figure.
0165[0110] It is necessary to form grating in each of each 16 divided field individually in volume hologram 320 of this Embodiment 3. Therefore, from laser light source 11c of green light In formation of grating which diffracts outgoing radiation light, as shown in figure 9 (a) figure 9 (d), it describes above. Laser light source 11c of green light, light source Lgl of the same wavelength, and light source Lg2 are used. which is what emits the laser beam which light source L gl and Lg2 occurred from the same light source at this time, and was further divided. For example, the light from one laser light source is introduced in an optical fiber, and also it is a fiber cup. It divides into two fibers by La, and is in the position of Lgl and Lg2 about the outgoing radiation end face of these two fibers. It may arrange. moreover -- the interference exposure using these light sources -- light source Lgl -- volume Jolo the optical position to gram 320 -- a figure -- in agreement with laser light source l ie shown in 8 (a) and (b) Fixing to a position, light source Lg2 changes the position every division field 32.
0166[0111] for example, a figure -- 9 (a) -- arranging light sources Lgl and Lg2, as shown in Drawing 9 (d) -- interference exposure -- 4 Do times -- grating 32c is formed in four fields on a par with one of 16 division fields of volume hologram 320 of things. to which light source Lg2 arranges each field of volume hologram 320 for spatial-light-modulation element 30 in interference exposure of each field focusing on the projection to which expansion projection is carried out. therefore, a figure -- 9 (a) -- four interference exposure shown in Drawing 9 (d) can be set to volume hologram 320 -- front -- Carry out for every sequence of an account division field, 16 division field 32 To of volume hologram 320 Grating 32c which diffracts the outgoing radiation light from laser light source 11c of green light forms in With. It is carried out. Fields other than the field exposed in the case of interference exposure of each above-mentioned division field 32 It shades with the shading mask which has an aperture of the shape corresponding to a division field. It carries out.
0167[0112] Grating which diffracts the outgoing radiation light from laser light source l ib of blue light, Drawing figure 10(a) 1 As shown in 10 (d), it is light source Lbl about the interference exposure using light source Lbl of the same wavelength as laser light source l ib of the above-mentioned blue light, and light source Lb2, volume hologram 320 is received -- to the extent that it is optical Place fixes to the position which is in agreement with laser light source 11c shown in Drawing 8 (a) and (b) -- light source Lb2 -- each -- It forms by carrying out by changing the position for every division field. The laser beam which occurred from light source Lbl, Lb2, and the same light source at this time, and was further divided is emitted. For example, 1 The light from the laser light source of One is introduced in an optical fiber, and also they are two Off at fiber A coupler. If it divides into Iva and the outgoing radiation end face of these two fibers is arranged in the position of Lbl and Lb2 It is good.
0168[0113] Four interference exposure shown in figure 10 (a) figure 10 (d) also in this case, To four fields on a par with one of 16 division fields 32 of volume hologram 320, Grating 32b which diffracts the outgoing radiation light from the laser light source of blue light is formed, and it is volume Ho about this four interference exposure. It carries out for every sequence of the above-mentioned division field in log rum 320, 16 division fields 32 of volume hologram 320 -- grating 32b which diffracts blue light is formed in all. Up Fields other than the field exposed also in It was and this case in the case of interference exposure of each above-mentioned division field It is made to shade. [0114] Grating which similarly diffracts the outgoing radiation light from laser light source 11a of red light, Figure 1 1 (a) -- As shown in Drawing 11 (d), it is light source Lrl about the interference exposure using laser light source 11a of the above-mentioned red light, light source Lrl of the same wavelength, and light source Lr2, the optical position to volume hologram 320 -- a figure -- it fixes to the position which is in agreement with laser light source 11a shown in 8 (a) and (b), and forms light source Lr2 by carrying out by changing the position for every division field. At this time, light source Lrl and Lr2 emit the laser beam which occurred from and the same light source, and was further divided. For example, the light from one laser light source is introduced in an optical fiber, and also it is two at fiber A coupler. It divides into a fiber and is arrangement To to the position of Lrl and Lr2 about the outgoing radiation end face of these two fibers. The is good.
0169[0115] this case -- a figure -- 1 Four interference exposure shown in 1 (a) figure 11 (d), To four fields on a par with one of 16 division fields 32 of volume hologram 320, grating 32a which diffracts the outgoing radiation light from a red laser light source is formed -- this four interference exposure -- the above-mentioned division carrying out for every sequence of a field -- 16 division fields 32 of volume hologram 320 -- all Grating 32a which diffracts red light is formed. It is each above-mentioned division also in this case. It is made for fields other than the field to expose to shade in the case of interference exposure of a field.
0170[0116] Explain a operation effect below.
0171Laser light source 11a of red light, blue light, and green light -- If light is emitted from 11c, Laser beam Prism 12a with which the outgoing radiation light from source 11a, l ib, and 11c was provided on the submount 10, and 1 It is reflected by 2b and 12c and these catoptric light irradiates with diffraction part 320. At this time, it is this each Les. 1 the light source 11a -- The optic axis of each light emitted from 11c corresponds on diffraction part 320, and it irradiates with the same field of diffraction part 320.
0172[0117] And three lights from laser light source 11a 11c, red light, blue light, and green light, This time When passing folded part 320, it passes through this field in each division field 32 of the above-mentioned diffraction part 320. The optic axis of Red and a blue and green light is in agreement, and it is the whole surface of the same field 30, i.e., a spatial-light-modulation element. It is diffracted and emitted so that it may glare. thereby -- the above-mentioned spatial-light-modulation element 30 top -- each -- It is irradiated with light with uniform light intensity distribution which multiplexed the laser beam of the color.
0173[0118] As mentioned above, according to this Embodiment 3, it is about diffraction part 320. Field division is carried out at the shape of two dimensions, grating which carries out the diffraction emission of the outgoing radiation light from each light source to each division field of the diffraction part 320 , Each light source light which passed through each field serves as a coaxial beam, and he is Mitsuteru of spatial-light-modulation element 30. Since multiplex formation was carried out so that it might shoot and might irradiate with the whole field surface, the outgoing radiation light from three laser light sources -- said -- the micro light equipment which can also make uniform intensity distribution of each light source light on the above-mentioned spatial-light-modulation element 30 while being able to miniaturize the optical system changed into an axial beam -- Offer thing power S it offers -- it can do.
0174[0119] Although the lens array which constitutes the optical integrator which is the former requires cost for processing etc., it uses a photosensitive material (polymer) small [ and a volume hologram ] and cheap, and since it is producible, it is, Like this Embodiment 3, diffraction part 320 which consists of volume holograms is optical Int gray. The cost of a device is reducible if it has a function of Tha.
0175[0120] Diffraction part 320 is [ in / in addition / this Embodiment 3 ] :! It is OK even if it is a thing [ like Embodiment 2 ] whose diffraction part is and which comprises a volume hologram of two sheets, although the case where it comprised a volume hologram of Sheet was mentioned as the example and explained. in this case, a figure -- making uniform light intensity distribution of each light source light on spatial-light-modulation element 30 like Embodiment 3, if volume hologram 221 of The 1 shown in 5 is made the composition which carried out field division as shown in this Embodiment 3 The made effect is acquired.
0176[0121] It is although the case where diffraction part 320 was divided into 16 was mentioned as the example in this Embodiment 3, field division of a diffraction part is not restricted comparatively for 16 minutes -- part beyond 64 division, 128 division, and also it A rate is possible and it is also possible to carry out field division of a diffraction part according to the plane shape of a spatial-light-modulation element as [ differ / the numbers of arrangement of and its division field in every direction ].
0177[0122] (Embodiment 4)
0178above-mentioned embodiment 11 [ hereinafter, ] -- the light equipment explained by 3 was used Two-dimensional image display device It attaches and explains.
0179Drawing 12 can be set to this Embodiment 4. It is a figure showing the composition of a two-dimensional image display device.
0180[0123] figure, it sets to 12 -- 500 -- this embodiment 4 it is a two-dimensional image display device -- this -- Two-dimensional image display device 500 is provided with the following. Laser light source of red light, blue light, and green light Light equipment which has l la, l ib, and 11c 300 The light equipment An object for red lights, blue light which make each laser light source in 300 drive for, laser actuator for green light 550a -- 550c This each laser actuator 550a -- 550c Laser switching part which changes a drive 540 The red picture signal, blue Movie which are inputted from the outside An image signal and a green picture signal are changed and it is a spatial-light-modulation element. Picture signal switching part outputted to 30 530, A control signal is outputted so that each picture of RGB may be displayed one by one, and it is the above-mentioned laser change. Part 540 and picture signal switching part Control part which controls 530 520, The above-mentioned light equipment. It comes out from 300. Field lens which makes each laser beam by which power was carried out the condensing velocity of light near a parallel pencil 560 and the above Spatial-light-modulation element Outgoing radiation light from 30 is received and it is a screen. Projection lens projected on 51 5 10 Here, the above-mentioned light equipment 300 is the same as that of the thing of the above-mentioned Embodiment 3. It is a thing.
0181[0124] Next, it was constituted as mentioned above. Operation of two-dimensional image display device 500 is explained.
0182first -- picture signal switching part 530 embraces the control signal outputted from control part 520 -- ON changing the red picture signal, blue picture signal, and green picture signal by which power was carried out one by one -- space light -- strange It outputs to tone element 30.
0183[0125] Laser switching part 540 embraces the control signal from the above-mentioned control part 520, and are an object for red lights, an object for blue lights, and laser actuator 550a for green light. -- 550c is made to drive and they are red, blue, and green. Laser light source 1 la -- 1 lc is made to turn on one by one.
0184[0126] Thereby, it is carried out by luminescence by the laser light source of each color and formation of the picture of each color by the above-mentioned spatial-light-modulation element 30 synchronizing. Specifically, it is a letter of luminescence of laser light source 11a for red lights. By voice, A red picture signal is supplied to the above-mentioned spatial-light-modulation element 30, and the abnormal conditions of red light are lines. It is divided and is at the lighting condition of laser light source l ib for blue lights, the above-mentioned spatial-light-modulation element 30 -- blue Movie an image signal is supplied and the abnormal conditions of blue light are performed -- lighting condition of laser light source 11c for green light Then. -- a green picture signal is supplied to the above-mentioned spatial-light-modulation element 30 -- the abnormal conditions of green light -- To be done.
0185[0127] And the picture formed by the abnormal conditions of the light of each color by such a spatial-light-modulation element 30 is projected on screen 51 with projection lens 510.
0186[0128] In addition, when displaying an animation, it is a picture of many frame numbers to a short time, For example, in order for power S which needs to display the picture of 30 frames per second, and the device 500 concerned to realize this During the image display of one frame of the picture displayed by 30 frames per second, it is each light source 11a. -- If it is made to control by the above-mentioned control part 520 to make 11c emit light several times respectively, It sees by man's eyes. Since it becomes impossible to separate the picture of each color when it guesses, a user is a full color natural animation. An image is observable.
0187[0129] As mentioned above, according to this Embodiment 4, they are three laser light sources 11a about the light equipment of two-dimensional image display device 500. -- 11c, laser light source 11 a -- the outgoing radiation light from 11c -- these -- the same axle Shall have diffraction part 320 it multiplexs [ part ] so that it may become a beam and which consists of volume holograms. so This which miniaturizes the optical system which changes the outgoing radiation light from three laser light sources into a coaxial beam It can do and is this. It becomes possible to miniaturize a two-dimensional image display device.
0188[0130] Since diffraction part 320 of the light equipment 300 concerned has the function of an optical integrator according to this Embodiment 4, Fly which was conventionally required for equalization of light intensity distribution Even if it does not use the optical integrator which consists of eye lenses, the output light of light equipment is intensity distribution. It will become uniform. thereby, the intensity distribution of light source light is uniform Two-dimensional Image display while being able to miniaturize Place more -- being concerned -- the number of component parts of a two-dimensional image display device is also reducible -- group Mission is easy and cheap. A two-dimensional image display device is realizable.
0189Industrial applicability
0190[0131] the light equipment of the present invention -- and -- An image projection device with a small two-dimensional image display device, and portable Sentiment Useful as what is used for a news terminal or a note type personal computer
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Numbers
- Publication
- 2005/073798
- Application
- 975
Titles2
- English
- LIGHT SOURCE DEVICE, AND TWO-DIMENSIONAL IMAGE DISPLAY UNIT
- French
- DISPOSITIF D'ECLAIRAGE ET VISUALISATEUR D'IMAGES BIDIMENSIONNELLES
Classification
- CPC, 11
- G02B27/1053
- G03B21/00
- G02B27/1073
- G02B27/1093
- G02B27/149
- H04N9/3114
- H04N9/3129
- H04N9/315
- G03B21/208
- G03B33/12
- H04N5/74
- IPC, 3
- G03B21 00
- G03B21 14
- H04N9 31
Designated states4
- Regional, 4
- Zimbabwe
- Turkmenistan
- Türkiye
- Togo