Manufacture of concave lens

[Detailed Description of the Invention]

The present invention relates to the manufacturing method of a concave spherical lens, and relates to the manufacturing method of the Small diameter for copying walk side lens especially used for object I-S of a microscope, Sound Lens, etc. Generally, it is Distress to manufacture the concave spherical lens near a hemisphere with high precision irrespective of the size of the curvature radius of a walk side. Especially the thing processed with high precision by a polishing means when the curvature radius of a concave surface of a sphere is 0.5 or less Battle is next to impossible. Then, its attention is paid to the sphericity of the air bubbles which arise in another [ fusion material ], or a very high thing when carrying out creation of Karasuke L1 these days, using the concave surface of a sphere which produced and cheated out of Imitation air bubbles intentionally, and was formed of the mind t!l into the lens material carried out among Melting ~ -- walk [-- business -- a means to manufacture a lens is taken in (VAl -- obtaining -- JP,55-149998,A). According to the production means of the above-mentioned walk side lens, by polish processing, there are profit J that the impossible concave spherical lens of 0.5 or less cities can be manufactured with office sphericity, and zeta 1. however, in the case of the above-mentioned conventional means, there was a problem like the next inside. Namely, in order to obtain the walk side lens which has the arbitrary curvature of half a line using the above-mentioned conventional means, if the air bubbles which have a curvature radius of t4r Desire out of the air bubbles of a large number which exist in lens material are Searched 44'' kicked by precise measurement, will not become, but if useless time is The first time(ed) to the work, boil 7, and work is very troublesome and serves as Over 1 Soft 11r -- /1:. 1 Thu old things 3, such as a quartz board, are made to fabricate many four parts 4 of an equal diameter by Etsunangu etc. via mask 2 which allocated circle diameter hole 1 of said-good and d in regular intervals l, as shown in Drawings 1 a and b. Aim it is made for many air bubbles of a fixed size to produce into lens material via this material 3 is also adopted. However, in order to obtain the concave spherical lens which has arbitrary curvature radii also in the case of this method, four copies of apertures of 4 had to be changed each time, and that work was In-depth very much. If the whole temperature was not made uniform for obtaining the air bubbles of a fixed curvature radius, nothing: and To, and this work also had Wastefulness extremely. Since it had the above-mentioned Open problem, in Technical description, it became very difficult conventionally to manufacture stably the Small diameter for copying walk side lens which has arbitrary curvature radii with high precision. being made in view of a problem of the above-mentioned conventional technology in the present invention -- an adequate several object for mold release -- it lays underground into lens material which fused an eb ball, and takes out pre-mixing the pitches after that. therefore, a concave spherical lens which acts as an old man of the desired curvature radius -- easy Cut -- problems in the above-mentioned conventional technology are solved by providing a method of manufacturing certainly. Hereinafter, the example of the present invention is described in detail using Drawing 2. Drawing 2 shows the example in which the walk side which shows the device for enforcing the manufacturing method of the concave spherical lens concerning the present invention, and has a desired curvature radius into crystal materials (lens material), such as Ate, Ruffy, and To 7 Aiya, is made to form. In this example, adequate several installation support of the awarded balls 6 fabricated with the materials (I!A For example tungsten, black lead, etc.) which have the melting point higher than the melting point (2030degreeC) of lens material CA l 203 crystal 5 first, and can be released from mold is carried out on plate 7 which can move up and down freely. Next, while making aluminum2O3 (aluminum oxide) powder 8 fall from the upper part of pre-mixing the pitches 6, this AA'203 powder is made to fuse via oxyhydrogen flame 9, and deposition covering is carried out on ball 6. Conversiond -- rubbing -- deposition growth of the ball 6 is carried out -- making -- deposition covering of the aluminum2O3 fused in order to embed into It was k1203 crystal is carried out on ball 6. And finally ball 6 embedded during the above-mentioned aluminum2O3 crystal is taken out. According to the described method, adequate several fabrication of the concave surface of a sphere according to the number of - balls will be carried out at Ajh after removing ball 6, and Ok Poetry crystal. Since a walk side will be in a specular surface state, without giving polish processing entirely if specular surface finish of the surface of ball 6 is carried out, the concave spherical lens which has a concave surface of a sphere of a specular surface can be manufactured easily. Therefore, according to this method, the impossible diameter [ of minute ] concave spherical lens of about 0.5 or less U of secondary elaboration can be manufactured easily. According to the described method, the concave surface of a sphere from which the path of A few differs simultaneously can be fabricated by changing the path of ball 6 into aluminum2O'3 crystal which is lens material. In particular, in the present invention, a concave spherical lens which has a desired curvature radius can be manufactured simply and certainly. Therefore, the same as the above of the workability in fabrication operation of a concave spherical lens can be carried out to dog lI'id. The Small diameter for copying walk side lens which has desired arbitrary curvature radii can be manufactured in office accuracy that there is no futility by manufacturing ball 6 of the diameter of different in Sl A little 1u'', and arranging each ball 6 on plate T. Direction theta which manufactures a walk side lens by not being limited to this, laying a ball underground into lens material Medi 5 about the crystal of a ruby, sapphire, etc. at mold release iJ ability although revealed, and taking out a ball in the wood in the above-mentioned example; it belongs to the All present invention. As mentioned above, the process laid underground into the lens material which fused the ball which the present invention has the melting point higher than the melting point of lens material, and can be released from mold, Since it is [ process / of taking out pre-mixing the pitches from the above-mentioned lens material ] a manufacturing method of a Formation 5 Concave spherical lens, while, being able to manufacture the diameter buccal mass side lens of minute with high precision without futility easy moreover, the higher efficacy that the working capacity in eel fixtures business can be improved sharply is played.

[Brief Description of the Drawings]

An explanatory view for Drawings 1 a and b to illustrate the melting point between conventional technologies and Drawing 2 are front explanatory views showing one example of the manufacture device for enforcing the method concerning this invention. 511 .. 1203 crystal 610 balls 7 ... Plate 8 ... The end of k1203 prefecture Drawing 1 of applicant-for-a-patent Olympus Optical Co., Ltd. (Q) (b) " 16