JPH03100627A - Optical device with mask - Google Patents
Optical device with maskInfo
- Publication number
- JPH03100627A JPH03100627A JP23856889A JP23856889A JPH03100627A JP H03100627 A JPH03100627 A JP H03100627A JP 23856889 A JP23856889 A JP 23856889A JP 23856889 A JP23856889 A JP 23856889A JP H03100627 A JPH03100627 A JP H03100627A
- Authority
- JP
- Japan
- Prior art keywords
- electro
- optical
- lens function
- aperture
- optical beam
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 230000004075 alteration Effects 0.000 abstract 2
- 230000000873 masking effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
Abstract
PURPOSE:To prevent aberration deteriorated due to an area not having a satisfactory lens function by limiting the optical beam cross-sectional shape of an incident optical beam to an electro-optical medium to the area where a lens function can be effectively applied with the aperture of a masking means. CONSTITUTION:A thin plate mask M as the masking means is directly provided fixedly at the incident side end face of the electro-optical medium 30. The mask M is provided with light shielding property, and is provided with the aperture AP, and the aperture AP is formed in circular shape, and the diameter of it is set fitting in the size of the area where an effective lens function can be applied to the optical beam transmitting the electro-optical medium 30. The optical beam cross section of the incident optical beam BM is formed larger than the aperture AP, however, a peripheral optical beam part is shielded with the mask M, and the optical beam goes to the one with diameter corresponding to the area where the satisfactory lens function is applied, and is made incident on an optical device. In such a way, it is possible to block a beam which makes worse the aberration against the lens function by the optical device, and to realize the satisfactory lens function.
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はマスク付き光学素子に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an optical element with a mask.
［従来の技術］[Conventional technology]
Claims (1)
の電気光学媒体の光ビーム透過方向を挟むようにして上
記電気光学媒体に形成された１対以上の電極対と、マス
ク手段とを有し、 上記１対以上の電極対に電圧を印加するとき、電気光学
媒体を透過する上記光ビームが所望のレンズ作用を受け
るように上記電極対の配置位置および形状を定めてなり
、 上記マスク手段は、上記電気光学媒体への入射光ビーム
の光束断面形状を、上記レンズ作用が有効に作用する領
域に制限する開口を有し、電気光学媒体の入射側端面も
しくはその近傍に電気光学媒体と一体的に設けられるこ
とを特徴とする、マスク付き光学素子。[Scope of Claims] An electro-optic medium into which a linearly polarized light beam is incident, one or more pairs of electrodes formed on the electro-optic medium so as to sandwich the light beam transmission direction of the electro-optic medium, and a mask means. and the arrangement position and shape of the electrode pair are determined so that when a voltage is applied to the one or more electrode pairs, the light beam passing through the electro-optic medium receives a desired lens effect, The mask means has an aperture that limits the beam cross-sectional shape of the light beam incident on the electro-optic medium to a region where the lens action effectively acts, and the mask means has an aperture that limits the cross-sectional shape of the light beam incident on the electro-optic medium to a region where the lens action effectively acts, and has an electro-optical An optical element with a mask, characterized in that it is provided integrally with a medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23856889A JPH03100627A (en) | 1989-09-14 | 1989-09-14 | Optical device with mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23856889A JPH03100627A (en) | 1989-09-14 | 1989-09-14 | Optical device with mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03100627A true JPH03100627A (en) | 1991-04-25 |
Family
ID=17032157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23856889A Pending JPH03100627A (en) | 1989-09-14 | 1989-09-14 | Optical device with mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03100627A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010220694A (en) * | 2009-03-20 | 2010-10-07 | Brother Ind Ltd | Multi-needle sewing machine |
-
1989
- 1989-09-14 JP JP23856889A patent/JPH03100627A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010220694A (en) * | 2009-03-20 | 2010-10-07 | Brother Ind Ltd | Multi-needle sewing machine |
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