JPH02116731A - Lens distortion inspection method - Google Patents
Lens distortion inspection methodInfo
- Publication number
- JPH02116731A JPH02116731A JP26984688A JP26984688A JPH02116731A JP H02116731 A JPH02116731 A JP H02116731A JP 26984688 A JP26984688 A JP 26984688A JP 26984688 A JP26984688 A JP 26984688A JP H02116731 A JPH02116731 A JP H02116731A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- distortion
- inspection method
- lens distortion
- distortion inspection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000007689 inspection Methods 0.000 title claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はレンズの歪み検査方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a lens distortion inspection method.
従来のレンズの歪み検査方法としては、レーザ法、水銀
灯検査法などがある。Conventional lens distortion testing methods include a laser method and a mercury lamp testing method.
しかし、従来の方法は、レーザ法は装置が高価であり、
水銀灯検査法では極部的な歪みは見れても、中央部のゆ
るやかな歪みはわからない。However, the conventional laser method requires expensive equipment;
Although the mercury lamp inspection method can detect local distortions, it does not reveal gradual distortions in the center.
そこで、本発明は従来のこのような問題点を解決するた
め、安価でしかも歪みの度合いを正確に検出することを
目的とする。SUMMARY OF THE INVENTION In order to solve these conventional problems, it is an object of the present invention to accurately detect the degree of distortion at low cost.
本発明のレンズの歪み検査方法は、プラスチックレンズ
表面で反射した像のゆがみにより歪の度合いを数値化す
ることを特徴としている。The lens distortion inspection method of the present invention is characterized by quantifying the degree of distortion based on the distortion of an image reflected on the surface of a plastic lens.
〔実施例］
以下、本発明について、実施例に基づき詳細に説明する
。[Examples] Hereinafter, the present invention will be described in detail based on Examples.
第２図の様に、レンズに映す像としては天井に取り付け
られた２灯式の直管蛍光灯２０１を用い、その直下にレ
ンズ２０３の凸面を上にして固定する。写真機２０２は
、蛍光灯２０１とレンズ２０３の間に位置するが、この
時、レンズ２０３に映った蛍光灯２０１の像が第１図の
様に中央部において、もっとも細く（太く）なるように
レンズの角度を調節する。この像の中央部と周辺部にお
ける像の幅の比によって第１図ａ：ｂの値、レンズの歪
みの度合いを数値化することができる。As shown in FIG. 2, two straight fluorescent lamps 201 mounted on the ceiling are used as images to be projected on the lens, and a lens 203 is fixed directly below the lamp with the convex surface facing upward. The camera 202 is located between the fluorescent lamp 201 and the lens 203, but at this time, the image of the fluorescent lamp 201 reflected on the lens 203 is made to be thinnest (thicker) at the center as shown in FIG. Adjust the lens angle. The value of a:b in FIG. 1 and the degree of lens distortion can be quantified by the ratio of the width of the image at the center and the periphery of the image.
以上説明したプラスチックレンズ表面で反射した像のゆ
がみにより歪みの度合いを数値化する方法は、安価に、
しかもわかりにくい歪みの度合いを数値化することがで
き、検査工程において、はっきりとした規格を定めるこ
とが可能となった。The method described above for quantifying the degree of distortion based on the distortion of the image reflected on the surface of a plastic lens is an inexpensive method.
Moreover, the degree of distortion, which is difficult to understand, can be quantified, making it possible to establish clear standards in the inspection process.
第１図は、本発明におけるレンズの検査状態を示す平面
図で、第２図は、本発明の歪み検査方法を示す斜視図で
ある。
２０１・・・・・・蛍光灯
２０２・・・・・・写真機
２０３・・・・・・レンズ
以上
出願人 セイコーエプソン株式会社
代理人弁理士 鈴木喜三部 他１名FIG. 1 is a plan view showing a lens inspection state according to the present invention, and FIG. 2 is a perspective view showing a distortion inspection method according to the present invention. 201...Fluorescent lamp 202...Camera 203...Lens and above Applicant Seiko Epson Corporation Representative Patent Attorney Kizobe Suzuki and 1 other person
Claims (1)
ンズの歪の度合いを数値化することを特徴とするレンズ
の歪み検査方法。A lens distortion inspection method characterized by quantifying the degree of lens distortion based on the distortion of an image reflected on the surface of a plastic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26984688A JPH02116731A (en) | 1988-10-26 | 1988-10-26 | Lens distortion inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26984688A JPH02116731A (en) | 1988-10-26 | 1988-10-26 | Lens distortion inspection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02116731A true JPH02116731A (en) | 1990-05-01 |
Family
ID=17478005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26984688A Pending JPH02116731A (en) | 1988-10-26 | 1988-10-26 | Lens distortion inspection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02116731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225441A3 (en) * | 2001-01-23 | 2004-01-21 | Menicon Co., Ltd. | Method of obtaining particulars of ophthalmic lens |
-
1988
- 1988-10-26 JP JP26984688A patent/JPH02116731A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225441A3 (en) * | 2001-01-23 | 2004-01-21 | Menicon Co., Ltd. | Method of obtaining particulars of ophthalmic lens |
| US7053997B2 (en) | 2001-01-23 | 2006-05-30 | Menicon Co., Ltd. | Method of obtaining particulars of ophthalmic lens |
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