JPS6089620U - Photodetector for information detection - Google Patents
Photodetector for information detectionInfo
- Publication number
- JPS6089620U JPS6089620U JP18118883U JP18118883U JPS6089620U JP S6089620 U JPS6089620 U JP S6089620U JP 18118883 U JP18118883 U JP 18118883U JP 18118883 U JP18118883 U JP 18118883U JP S6089620 U JPS6089620 U JP S6089620U
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- light
- magneto
- optical recording
- information
- 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
Landscapes
- Optical Head (AREA)
- Signal Processing For Digital Recording And Reproducing (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は開口数の大きいレンズに直線偏光された光束を
入射させた際における透過光の偏光方向を説明した図、
第２図乃至第４図は各々本考案の実施例であって光検出
器の平面図である。
１．１’、１″・・・・・・光検出器。Figure 1 is a diagram explaining the polarization direction of transmitted light when a linearly polarized light beam is incident on a lens with a large numerical aperture.
2 to 4 are plan views of a photodetector according to an embodiment of the present invention. 1.1', 1''...Photodetector.
Claims (1)
上に集束させ、その反射光を上記対物レンズ、光路分割
素子を経て情報検出用光検出器に入射させて、上記光磁
気記録媒体の情報を読み取るようにした光磁気記録方式
の情報再生装置において、 光検出器の受光部を、該光検出器への入射ビームの偏光
方向に対して４５°をなす角度方向であってレンズの周
辺部からの光が照射される付近に受゛光部を有しない形
状としたことを特徴とする情報検出用光検出器。[Scope of Claim for Utility Model Registration] A linearly polarized light beam is focused on a magneto-optical recording medium through an objective lens, and the reflected light is incident on a photodetector for information detection through the objective lens and an optical path splitting element. , in the magneto-optical recording information reproducing device configured to read information from the magneto-optical recording medium, the light receiving part of the photodetector is arranged at an angle of 45° with respect to the polarization direction of the beam incident on the photodetector. 1. A photodetector for detecting information, characterized in that the photodetector has a shape that does not include a light-receiving part near the direction where light from the peripheral part of the lens is irradiated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18118883U JPS6089620U (en) | 1983-11-24 | 1983-11-24 | Photodetector for information detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18118883U JPS6089620U (en) | 1983-11-24 | 1983-11-24 | Photodetector for information detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6089620U true JPS6089620U (en) | 1985-06-19 |
Family
ID=30392679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18118883U Pending JPS6089620U (en) | 1983-11-24 | 1983-11-24 | Photodetector for information detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6089620U (en) |
-
1983
- 1983-11-24 JP JP18118883U patent/JPS6089620U/en active Pending
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