JPS59161520U - Photodetector for optical information detection - Google Patents
Photodetector for optical information detectionInfo
- Publication number
- JPS59161520U JPS59161520U JP5347883U JP5347883U JPS59161520U JP S59161520 U JPS59161520 U JP S59161520U JP 5347883 U JP5347883 U JP 5347883U JP 5347883 U JP5347883 U JP 5347883U JP S59161520 U JPS59161520 U JP S59161520U
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- optical information
- photodetector
- information detection
- 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 Recording Or Reproduction (AREA)
- Optical Head (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図は本考案を適用する受光素子を有する光学記録再
生装置の光学系の一例を示す斜視図、第２図はそのトラ
ッキング検出方法を説明する図式図、第３図はその焦点
検出方法を説明する図式図、第４図は従来の受光素子の
構成を示す斜視図、第５図はそのナイフェツジ面での反
射光によるフレア発生状態を示す図式図、第６図はその
検出限界を説明する曲線図、第７図は本考案の実施例を
示す斜視図、業８図は他の実施例を示す斜視図である。
１・・・レーザ、５・・・対物レンズ、６・・・光情報
記録媒体、９・・・ナイフェツジ部材として利用される
受光素子、９−４・・・ナイフェツジ面、１ｏ・・・焦
点検出用２分割受光素子、１１・・・トラック、１３・
・・基板、１４・・・受光層。
第１図 −
第３図Fig. 1 is a perspective view showing an example of an optical system of an optical recording/reproducing device having a light receiving element to which the present invention is applied, Fig. 2 is a schematic diagram illustrating its tracking detection method, and Fig. 3 is its focus detection method. Schematic diagrams to explain, Figure 4 is a perspective view showing the configuration of a conventional light receiving element, Figure 5 is a diagram showing the state of flare generation due to reflected light on the knife surface, and Figure 6 explains its detection limit. 7 is a perspective view showing an embodiment of the present invention, and FIG. 8 is a perspective view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Laser, 5... Objective lens, 6... Optical information recording medium, 9... Light-receiving element used as a knife member, 9-4... knife surface, 1o... Focus detection 2-split light-receiving element for use, 11...track, 13.
... Substrate, 14... Light-receiving layer. Figure 1 - Figure 3
Claims (1)
上に集光させて情報を記録し又は読取り、その反射光束
の一部を少くとも２分割された受光素子をナイフェツジ
部材として遮光し結像位置に設けた別の２分割受光素子
により焦点検出を行なう光学的記録再生装置の上記のナ
イフェツジ部材となる受光素子において、該受光素子は
ナイフェツジを形成する端面で受光層を基板の端面より
突出する如く基板に接合して作られたことを特徴とする
受光素子。 −A light beam from a laser is focused on an optical information recording medium through an objective lens to record or read information, and a part of the reflected light beam is blocked by a light receiving element divided into at least two halves as a knife member to form an image. In the light-receiving element serving as the above-mentioned knife member of an optical recording/reproducing device that performs focus detection using another two-split light-receiving element provided at a position, the light-receiving element has a light-receiving layer protruding from the end face of the substrate at the end face forming the knife. A light-receiving element characterized in that it is made by being bonded to a substrate. −
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347883U JPS59161520U (en) | 1983-04-12 | 1983-04-12 | Photodetector for optical information detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5347883U JPS59161520U (en) | 1983-04-12 | 1983-04-12 | Photodetector for optical information detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59161520U true JPS59161520U (en) | 1984-10-29 |
Family
ID=30183823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5347883U Pending JPS59161520U (en) | 1983-04-12 | 1983-04-12 | Photodetector for optical information detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59161520U (en) |
-
1983
- 1983-04-12 JP JP5347883U patent/JPS59161520U/en active Pending
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