Zoom lens system and image pick-up apparatus including same

The zoom lens system and comprises a zoom lens system image pickup device

technical field

The invention relates to a zoom lens, more specifically, and a are, wherein the invention relates to a capable of being used as image pickup apparatus and apparatus and system in image collecting optical system.

background technology

The capture object image, comprising a vibration of the image collecting system, an image according and catching is possibly slurred. Order to prevent to the receiving the fuzziness, discussed the known vibration control optical system.

Known service system for photography zoom lens system with shifting multiple sets of lens for compensating the fuzziness.

The known zoom lens system, comprising four groups of lens, namely, according to claims with refracting power to the side in a lens system object side (a) and first lens group, is provided with a negative refracting power second lens group, is provided with a refracting power third lens group image, and a refracting the power lens set. The zoom lens system with is vertical vibration the whole third lens group shock to obtain the frozen and optical shaft hole (sees to say the bus claim No.10-260356).

The invention claims grantee for with the control function four groups of zoom lens system. The zoom lens system lens group comprises a refracting the inductive first lens group, with a negative refracting power second lens group, is provided with a refracting power third lens group, and a refracting the power lens set. Providing first lens and third sets of lens of the second lens group. Is composed of a negative refracting power concave lens group the bamboo bed mat three sets of lens and a refracting the power convex lens group. The convex lens group is vertical vibration the optical shaft direction, obtains frozen glass (e.g. sees, Japanese claim No.7-128619 bus and U-237550 and 2002-244037) „

The grantee further systems for zoom lens, except for is divided into two with the third lens group refracting the power convex lens group and a convex lens group is vertical vibration to obtain of the optical shaft hole for frozen glass, the zoom lens system can provided with four groups of zoom lens system with structures on obfuscation (e.g. sees, Japanese patent bus) No.2001-66500.

Usually, a groove is needed the extra optical system to control the vibration, particularly invention is vertically and is parallel to the offset (crankpin) and multiple sets of lens and optical shaft to control the image collection system is provided.

The target, and is, which is used for touch device of the space of the light path, and control vibration possibly with the eccentric aberration.

Recently, the camera is connected with the markets of the invention is with three charge-coupled device (3CCD) to enhance is capturer the quality.

Expected intensely between the 3CCD system zoom lens system with high zoom for controlling is capturer the image for zoom lens system (the inclined) and fuzzy vibration control function.

, Image zoom lens system expected particularly wherein intensely with the high-sensitivity eccentric device of the small optical system, the lens group is the lead for controlling the lens group of vibration.

And; a through is the vertical rod (crankpin) lens group is optical shaft direction control signal of the optical system, increase the control sensitivity and improving zoom to make the eccentric aberration to increase, an optical performance to drop.

, Is very difficult to compensating aberration according to the lens unit (crankpin) with the dolly the side of. .

The invention, image with the control mechanism zoom lens, a wherein when the correcting fuzzy or reducing the error with the optical performance and upper vibration controller for sensitivity by hand deteriorate is beneficial.

invention content

The invention relates to a apparatus, wherein capable of being used as the image pickup device (e.g., and camera, a silver displaying camera and digital the cups or the area of claims personnel's known image pickup device and equate object) image collecting optical system.

At least a leds a claims a apparatus, wherein with a small optical system and the performing vibration control holding with good image quality vibration control mechanism.

At least a leds a left the zoom lens system, comprising: With refracting power first lens unit; With a refracting power second lens unit; With refracting power third lens unit; With a refracting the power unit. According to from the object side a first to the side in image to the bamboo bed mat fourth unit. The third lens unit comprises the negative refracting inductive first lens and subunit connected with the power refracting second lens sub-unit, and according to claims first to the side in a second image side surface and second lens sub-unit. And a photographic button, the second lens and fourth table is mounted along the optical axis, the second lens sub-unit layer is vertical to the optical shaft of the movable, order to is distributed from the image tilt the optical shaft direction. Of is satisfied with the following condition:

0.4<f3b/fl<0.70 of

0.5<|f3b/f3a|<0.8

Matter represents wherein the first lens unit focal distance, f3a expression of the focal distance of the first lens sub-unit, f3b represents a focal distance of the second lens sub-unit.

According to the indicating leds the embodiment (reference on digital); and character of the invention is obvious.

Brief for describing the drawings

Digital 1 display according to the invention leds first embodiment the zoom lens system wide-angle end of the sectional drawing;

Digital 2 display according to the invention bamboo bed leds mat embodiment the zoom lens system wide-angle end; aberration

Digital 3 display according to the invention leds first embodiment the zoom lens system of zoom position; aberration

Digital 4 display according to the invention leds first embodiment the zoom lens system dolly the end; aberration

Digital 5 display according to the invention leds second embodiment the zoom lens system wide-angle end of the sectional drawing;

Digital 6 display according to the invention leds second embodiment the zoom lens system wide-angle end; aberration

Digital 7 display according to the invention leds second embodiment the zoom lens system of zoom position; aberration

Digital 8 display according to the invention leds second embodiment the zoom lens system dolly the end; aberration

Digital 9 display according to the invention leds third embodiment the zoom lens system wide-angle end of the sectional drawing;

Graph io display according to the invention leds third embodiment the zoom lens system wide-angle end; aberration

Digital II display according to the invention leds third embodiment the zoom lens system of zoom position; aberration

Digital 12 display according to the invention leds third embodiment the zoom lens system dolly the end; aberration

Digital 13 display according to the invention claims a leds a image pickup device for drawing leds of main part.

Detailed composed of illustrated embodiments

) The at least a leds are as the pixel or the use of the invention and invention merely, and a wireless favor limiting keyboard.

The technical of the known process, technology, device and is corresponding area of the explain the detail, and uneven and a foldable indication upper part, for example the making and their material of lens element.

Matter meter and at least demonstrator of discussions, the concrete value, for example a photographic button and radius of curvature, explain is merely is; leds further in restrictive. Therefore, the other demonstrator of leds embodiment is provided with a different value. The attention; the following on digital, similar and tracking and character similar represents one, which the invention is defined one of on digital, which are longer discuss the one of the following on digital.

The attention, matter, wherein mentioned the error (e.g., a vibration) is or adjusting piece, the meaning is the error reference or a piece of error.

The lower leds embodiment reference the brief for describing the drawings comprises the zoom lens system image pickup device according to the invention claims a leds a zoom lens Type Tonghe.

Digital 1 display according to the invention leds first embodiment the zoom lens system wide-angle end of the sectional drawing. Digital 2, 3 and 4 are display according to the invention leds first embodiment, wherein the zoom lens system focuses on the input the object, wherein a lens system wide-angle end, the middle zoom and position of dolly end is: Differential.

Digital 5 display according to the invention leds second embodiment the zoom lens system wide-angle end of the sectional drawing. Digital 6, 7 and 8 are display according to the invention leds second embodiment, wherein the zoom lens system focuses on the input the object, wherein a lens system wide-angle end, the middle zoom and position of dolly end aberration.

Digital 9 display according to the invention leds third embodiment the zoom lens system wide-angle end of the sectional drawing, Figure 10, 11 and 12 of display according to the invention leds third embodiment, wherein the zoom lens system focuses on the input the object, wherein a lens system wide-angle end, the middle zoom and position of dolly end aberration.

Digital 13 a display a according to the invention claims a leds a zoom lens system camera (image pickup device) main part drawing leds.

Digital 1, 5 and 9 segmented drawing each display with the refracting power (light Angle Du of the reciprocating first lens unit Lla-c, comprising a refracting power second lens L2a-c unit, a refracting power third lens L3a-c unit and a refracting the power unit L4a-c.

Third lens L3a-c unit comprises a negative refracting power first lens L3al-three sub-unit and a refracting power second lens L3bl-three sub-unit. The second lens L3bl-3 sub-unit of the vertical (i.e. layer, vertical) with the optical shaft direction, and movable of controlling and/or reducing the (i.e., controlling is capturer the displacement of image). Order to control the lens, sub-unit L3b can be replaced to operate of the pivot shaft on the optical axis of the rotary). And a vibration control lens sub-unit, L3bl-3 with a is vertical to the optical shaft vector device with direction, and lens unit can move on image plane.

Zoom lens system comprises a laser the optical filter or panel optical module (. The zoom lens system and the image collection optical system in image pickup device, image plane IP equal to such as the CCD sensor or a complementary metal oxide semiconductor sensor solid-state image collection component (image converter) image collecting plane (e.g. camera or digital statically camera), wherein the zoom lens system and 囟 the image collection optical system of silver camera is equal to the film surface. First lens SP and a lens sub-unit L3al-three object side.

Are the aberration on digital display d- line d and g- line, g and midnight and noon image plane and THE orphaned arrow image plane S. The lateral chromatic aberration expression of the g- line. On digital display is F numbers (field of the number Fno) and angle of the o. Y shaft of the spherical aberration chart an pupil radius, wherein astigmatic aberration graph, twisted chart and chromatic aberration (is chromatic aberration) of the Y shaft of images of the image height.

According to the leds embodiment, a corresponding to the wide-angle end and dolly the end zoom from the working and magnifier device (i.e., wherein according to a leds a second lens unit L2a-c) of the lens unit movable the optical axis two ends of the zoom position arranged on the mechanism.

According to leds embodiment, wherein an out from the wide-angle end position to the dolly the end zoom position zoom, the second lens unit L2a-c the are used for enlarged image (e.g., A1-A3). At the same time, wherein the partial a light are the used for object (e.g. Bl-B3, the) L4a-c unit, a fluctuation of the image plane of The cabin Changyou the amplifying device for.

The zoom lens system with a secondary focusing system, with the L4 unit is placed on the focus of the optical axis of the secondary focusing system. Zoom lens system based on digital solid line curve 4a and empty curve of the u unit L4a represents respectively; and when focuses object for input the object and close, and performing of wide-angle of the dolly the end zoom, the movable device for L4a-c to compensating image face of the light, fluctuation

Is provided with a light movable (e.g. Bl-B3, the) L4a-c unit, capable of using third lens unit L3a-c efficiently and space between the device L4a-c. Therefore, the invention can reduce the zoom lens system is length effectively. And focus operation bamboo bed mat lens unit Lla-c and third lens unit L3a-c and zoom by hand of.

According to leds embodiment, for example, wherein a photographic of performing of dolly end of a infinite the object to the when the focus of objects, fourth unit L4a part of on digital the arrow

according to 4c meter.

According to the leds embodiment, wherein the is distributed with the lens unit the optical shaft (direction vibration control lens unit L3bl-three) is revised of the fuzziness or a reference error of the vibration of full optic-fibre and system.

The other phone, wherein the control vibration. The groove; Xiong Gou touch vibration, and is needed the extra optical element, for example variable top angle prism or vibration control unit lens. The invention, comprising avoided used for optical system is size.

The moving explain according to a leds example by a lens sub-unit L3bl-3 performing vibration control.

Usually, and a user rotary handle of the inclined zoom lens system optical axis.

At the time, a compensating optical shaft inclination angle e. , The lens control unit (equal to an leds embodiment lens sub-unit L3b1-3) is vertical with that The optical shaft direction. Vibration control lens unit is A distance (i.e., displacement of represents) by the following type

△=f.tan(e)/TS

Matter f expression of full zoom lens and that the focal length, TS represents the control unit lens position sensitive.

Matter, the eccentric sensitivity is indicated the following:

TS-AI/AL

Matter AL expression of the lens control unit is vertical to the length of the optical shaft of the movable, AI represents a image the distance of the image plane of movable. And the control unit lens position sensitive TS comprises a small, and distance of the lens control unit for increasing, obtains the distance A1. Therefore, the control unit lens effective lens of the booster.

Comparing to the normal single zoom lens, supporting 3CCD a zoom lens system requirement of the focal length of the camera; each is the space in image plane one side, a prism according the colour separation, therefore, an image to at least a leds a zoom lens, and third lens unit L3a-c refracting the power unit L4a-c is weaker, and third lens unit L3a-c is vertical is very small the optical axis the sensitive on direction.

The invention, and is vertical with full third lens unit L3a-c the optical shaft of performing the controller, and third lens unit L3a-c the distance of mobile is very hole.

According to at least a leds example's zoom lens system with groove; a camera lens system comprises a plus and minus, the refracting power lens unit four groups of zoom lens frequently system.

Is an zoom lens, when the third lens unit L3a-c position sensitive increasing, the third lens unit L3a-c refracting power is a. The invention, is very difficult to maintain the large the focal length. Therefore, the zoom lens system are possibly fit for a supporting 3CCD camera.

According to leds embodiment, bamboo bed mat three lens unit L3a-c is formed with a refracting power lens L3al-three sub-unit and a refracting power lens sub-unit L3bl-three. Object lens L3bl-3 sub-unit and control unit lens, therefore wherein refracting power and position sensitive TS a. The groove; the although zoom lens system and is used for supporting the 3CCD camera, wherein the small size and promoted the control.

According to the leds embodiment, a arranged in suitably for the controller, and are (crankpin) is lens sub-unit L3bl-3 focal distance; the zoom lens system capable of obtaining the zoom, for example 20 times of the variations. , Wherein the compensating of the lens L3bl-3 sub-unit

The eccentric aberrations of the movable and/or the offset (crankpin) with, for example the image bearing of eccentric and image plane groove, satisfies the following conditional expression according to the capable of leds example's zoom lens system at least one.

The following type, wherein f2 and expression is 0.1 th lens unit Lla-c and second lens unit L2a-c focal distance Ba, and Bb represents lens sub-unit L3al-three are lens and sub-unit L3bl-three focal distance.

The fully optical system and is indicated by fw and ft of the wide-angle end and dolly end of the.

The zoom lens system of dolly end of the focuses the input the object and lens L3bl-3 sub-unit is vertical with the optical shaft direction, the eccentric sensitivity of image tilt is indicated by TS.

Therefore, the leds embodiment satisfies the following conditional expression at least one:

0.4<f3b/fl<0,70 (1)

0.5<|f3b/f3a|<0.8 (2)

2.2<|Ob/f2|<4.1 (3)

0. 45< AND f2 AND claim w ft < 0. 58 (4)

0.6<ts<1.0 (5)

, And a explain the upper conditional expression the technical salient.

The following conditional expression 1 and 2 are used and reducing zoom lens is system of reducing the control of the change of the aberrations.

And High the Lens sub-unit L3b refracting power for improving, so surpasses the following conditional expression 1 lower limit, is very difficult to compensating of the eccentric aberrations of the lens unit are (crankpin) with, for example eccentric coma aberration and eccentric image plane groove. And High Chaoguo conditional expression l upper limit, and lens sub-unit L3bl -3 of a to be used in the controller, and a connecting the lens pipe diameter.

And surpasses conditional expression 2 lower limit, is very difficult to maintain is an of the colour separation optical system is the focal length of the lens and system. The is fruit surpasses the upper limit, and lens sub-unit L3bl -3 of a to be used in vibration control.

The following conditional expression 3 are used to the second lens unit and L2a-c lens sub-unit L3bl refracting -3, powers with a movable of the reducing reflection zoom lens system is size, and (crankpin) for holding with good optical performance and offset. And surpasses conditional expression 3 lower limit, is very difficult to limit and control having bias) aberration.

And surpasses the upper limit groove, Petzval (the perpetual) and booster in a direction, is very difficult compensating to the image plane groove.

At least one leds embodiment, a conditional expression the following 1 to 3, shape during control vibration promoting the middle optical performance, wherein the is a easily to maintain and tolerate is equipped with a lens sub-unit L3bl-three for compensating:

0.44<f3b/fl<0.6 (la)

0.55<|f3b/f3a|<0.75 (2a)

2.5<lf3b/f2 device <3,7 (3a)

The following conditional expression 4 are used to reduce the lens unit is length, of which the second lens unit L2a-c suitably mobile distance zoom process, and full zoom range, namely holding with good optical performance to the dolly the end of the wide-angle end.

And the second lens unit L2a-c refracting power for improving, so surpasses the following conditional expression 4 lower limit, and second lens unit L2a-c the distance for zoom process with a small. The invention, each Petzval and a number of the negative direction, therefore wherein a useless, and is very difficult compensating to the image plane groove.

And surpasses conditional expression 4 upper limiting, and second lens unit L2a-c increase the distance for zoom movable process, and is very difficult to reduce lens and system thereof.

At least one leds embodiment, and following is conditional expression 4: shape _

0- 5) < F2 AND claim w. ft<0. 56 (4a)

Is lower than the image size according to the image size of being used in camera or a digital statically camera solid-state image collection component (e.g. a CCD) is capturer the silver halide camera catching.

, Wherein the image collecting lens is the device for with a short focal distance of the photographic angle of image. Therefore, the control lens unit is the distance A for compensating the same vibration control angle is equipped with a reducing.

The invention, and accuracy of mechanism is approximately same, and under-compensation illuminance radiation screen and same layer and. An is the base capable leds example's zoom lens, and position of the control unit lens lens L3bl-three sub-unit, a lens sub-unit the L3bl 3, wherein the dolly the end focuses while the input the object is vertical with the optical shaft direction, a vibration control sensitivity TS satisfies the following conditional expression 5.

And the control TS sensitivity is less than the lower limit, which is used for controlling the lens sub-unit L3bl-3 can move a. The is useless groove, which is for driving the lens sub-unit L3bl-3 driving unit (e.g. driving unit with size.

On the based upon, and control TS sensitivity is greater than the following conditional expression 5 upper limiting, a vibration control, claim the movement of lens sub-unit L3bl-3 change of A small is. , And the chassis; the vibration control and very difficult, and under-compensation.

Capable of obtaining the electrode and control performance by the is conditional expression 5: shape

0.7<ts<0.9 (5a)

At least a leds with a non-spherical surface is a convex lens comprises at least one a lens sub-unit L3bl-3.

Therefore, the eccentric aberration according to the leds least one embodiment, and can reduce the controller, with, for example eccentric coma aberration.

Order to compensating the lateral bearing chromatic aberration, which is connected with comprises at least one concave lens in the lens L3bl-3 sub-unit.

At the time, to maintain to each third lens unit L3a-c the balance of chromatic aberration compensation, the lens sub-unit L3a1-3 comprises at least one convex lens.

For example, lenses sub-unit L3bl-three a convex lens and a lens system (e.g., a point convex lens and a convex lens and). The groove; for compensating blurs the control unit lens structure according to claims a section is minimum, which reduces the lens control unit and weight.

The groove, the invention can reduce for driving the control unit lens of the driving unit, and reducing reflection device size and lower the driving operation electric power consumption.

According to a leds, a first lens Lla-c unit comprises a convex lens and two or three convex lens. The invention, a align the lens is provided with a dispersion value and a high-refractive index glass material, urges compensating to the chromatic aberration to the dolly the end effectively.

The second lens unit L2a-c an to the lens of the object side of the image side surface is a concave crescent negative lens with, a convex lens and two surface is a convex convex lens, and object side surface is a concave concave lens.

By and second lens unit L2a-c a convex lens image side of claims a concave lens energy a photographic the change of the chromatic aberration.

According to the leds embodiment, capable of the first lens unit Lla-c object side and/or the device L4a-c the image side provided with a small refracting power lens unit.

Capable of providing dolly the conversion lens and/or the wide-angle conversion lens in and/or image side of.

And the upper, a leds embodiment, a lens unit refracting power and lens structure suitably, and an image to the small layer and optical lens L3bl-3 sub-unit of optical system Unified Ministry a Branch and control unit lens. Is on the vertical movable lens sub-unit L3bl-three optical shaft direction is compensated of the fog of the zoom lens system (the inclined) for. The invention, obtained is easy to compensating when the eccentric aberration zoom lens system for the lens unit are (crankpin) to. At the same time, can reduce the full optic-fibre system, simplified mechanism and lower applied to the drive unit negative set.

For example, a leds embodiment, capable of obtaining the apparatus, wherein the have the same layer is the focal length, which is suitable for a loop optical system for photography camera with three image collection component and colours of R, G and THE groove corresponding.

Moreover, a leds embodiment, capable of obtaining with the electrode and control of performance and high zoom (e.g. 20 times of the variations) is a lens system. An zoom lens system can be used in image pickup device, for example camera or digital statically camera.

A compromised respectively corresponding to the first, second, and a leds a first, second, a numerical a. Of each demonstrator,) expression of the object side counting serial numbers of lens surface, Ri expression of) th surface radius of curvature, Di represents the bamboo bed mat) on distance with i+l surface, Ni expression is composed of the) th lens or optical module of the object side counting the d line refraction index of material, vi represents a d line (An Abbe number).

A second to the third demonstrator, of close to the image inner surface is equal to the optical module for. Represents the surface shape of the following relational expression: (1/R) difference

<formula>formula see of document page 5</formula>

Matter represents MM of the distance optical shaft of the h arc-shaped curve surface body displacement and optical axis direction, IT is side of the radius of curvature, k is a conicity coefficient, B, C, d E is a non-spherical coefficient.

The demonstration, a e-x, expression of a xl0-x, a set represents focal length, Fno represents a F number, co represents the angle of image.

Is one to display meter relationship between the imaging expressions and demonstrator. l meter l by

<formula>formula see of document page 5</formula> relay, a finger to 13 digital the invention comprises according to the invention claims a leds a zoom lens system and photo-optical camera system.

Digital 13 a display the camera body 10, comprising according to the invention claims a leds a zoom lens system photo-optical system, 11 is the photo-optical system ll the object image solid-state image collection component (image) converter (12 e.g. the sensor CCD or CMOS sensor), for storing with the image collection component 12 shooting and converting object image to the memory for information 13, and apparatus for observing the display object image on the display device (ultra-image a graph without) display.

Display device is a liquid crystal display, and can be used in display forming the image collection component 12) is images.

Capable of obtaining according to the leds embodiment zoom lens, which is an image pickup device, for example a camera, comprising with good optical character small image pickup device.

Can be used in digital statically camera is the same path according to the invention claims a leds example's zoom lens system.

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