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Method for manufacturing lens, lens and optical device

A manufacturing method and technology of optical devices, applied in optics, lenses, optical components, etc., can solve the problems of increased lens cost, larger lens outer diameter, and inability to meet the miniaturization of devices or modules, etc.

Inactive Publication Date: 2013-05-08
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the outer diameter of the lens becomes larger, and the cost of the lens increases accordingly, which cannot meet the requirements for miniaturization of devices or modules.

Method used

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  • Method for manufacturing lens, lens and optical device
  • Method for manufacturing lens, lens and optical device
  • Method for manufacturing lens, lens and optical device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042]In Embodiment 1, the objective lens 100 corresponds to the "lens" described in the claims. The lens surfaces 102 and 103 correspond to the "lens portion" described in the claims. The lens surface 102 corresponds to the "first lens surface" described in the claims. The lens surface 103 corresponds to the "second lens surface" described in the claims. The contact point Pg2 corresponds to the "connection position" described in the claims. The description of the correspondence between the claims and the first embodiment is merely an example, and does not limit the claims to the first embodiment.

[0043] Figure 3A It is a top view of the objective lens 100 according to Embodiment 1 viewed from above, Figure 3B is a plan view obtained by observing the objective lens 100 from below, Figure 3C It is a top view of the objective lens 100 viewed from the front. In addition, the runner part 12 connected to the gate part 13 is omitted from illustration.

[0044] refer to ...

Embodiment approach 2

[0075] In the above-mentioned Embodiment 1, the embodiment in which the D-cut portion is not provided is exemplified, but in the second embodiment, the embodiment in which the present invention is applied to the case where the D-cut portion is provided is exemplified.

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PUM

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Abstract

The present invention relates to a method for manufacturing a lens, a lens and an optical device. In the method for manufacturing the lens, the lens is formed by injection molding. The lens has a circular shape and an end portion formed on the periphery of the lens portion. The method for manufacturing the lens includes a cutting-off step of cutting off a gate portion from a lens intermediate body, the gate portion corresponding to a resin injection channel and being formed on a side surface of the end portion. In this arrangement, the cutting-off step includes a step of removing the gate portion in such a manner that a cutting plane is inclined with respect to the optical axis of the lens portion.

Description

technical field [0001] The present invention relates to a method of manufacturing a lens, a lens, and an optical device, and more particularly, to a method of manufacturing a lens suitable for use in molding a lens by injection molding. Background technique [0002] In recent years, lenses made of resin have been mounted on optical devices such as optical pickup devices and camera modules. Such a resin lens is formed by injection molding, for example. In this case, the lens taken out from the mold for injection molding has a portion (hereinafter, referred to as "gate portion") corresponding to the injection port through which the resin flows during injection molding. After the lens is taken out from the mold, the gate portion is removed from the lens. [0003] Among them, a substantially circular shape is often required as the shape after the gate portion is removed from the lens. The reason why the substantially circular shape is required is as follows. [0004] When mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00B29C45/00B29C45/38
CPCB29C45/382G02B3/00B29C45/38B29C45/0053B29L2011/0016B29C2045/0058B29C45/00B29C2045/0077Y10T83/04
Inventor 匠蓝
Owner SANYO ELECTRIC CO LTD