JPS59153630U - optical playback device - Google Patents
optical playback deviceInfo
- Publication number
- JPS59153630U JPS59153630U JP4521483U JP4521483U JPS59153630U JP S59153630 U JPS59153630 U JP S59153630U JP 4521483 U JP4521483 U JP 4521483U JP 4521483 U JP4521483 U JP 4521483U JP S59153630 U JPS59153630 U JP S59153630U
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- beams
- incident
- recording medium
- playback device
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
、第1図は従来の光学式再生装置を示す配置図、第2図
は第1図の光学式再生装置の光検出器の構成を示す配置
図、第3図及び第4図は従来の他の光学式再生装置を示
す配置図、第5図は本考案による光学式再生装置の一実
施例を示す配置図、第6図は第5図の光学式再生装置の
光検出器の構成を示す配置図、第7図は光検出器上のビ
ームスポットの配置を示す線図、第8図は光学式ディス
ク上のスポットの配置を示す線図、第9図は本考案によ
る光学式再生装置の他の実施例を示す配置図、第10図
は第9図の光学式再生装置の光検出器の構成を示す配置
図、第11図は光検出器上のスポットの配置を示す線図
である。
41及び51は光源、42a54aは第1の回折格子、
42b、54bは第2の回折格子、48゜63は光学式
記録媒体、50.65は光検出器である。, FIG. 1 is a layout diagram showing a conventional optical reproducing device, FIG. 2 is a layout diagram showing the configuration of a photodetector of the optical reproducing device shown in FIG. 1, and FIGS. 3 and 4 are layout diagrams showing a conventional optical reproducing device. FIG. 5 is a layout diagram showing an embodiment of the optical reproducing device according to the present invention, and FIG. 6 shows the configuration of a photodetector of the optical reproducing device of FIG. 5. 7 is a diagram showing the arrangement of the beam spot on the photodetector, FIG. 8 is a diagram showing the arrangement of the spot on the optical disc, and FIG. 9 is a diagram showing the arrangement of the beam spot on the optical disc. FIG. 10 is a layout diagram showing the configuration of the photodetector of the optical reproducing device of FIG. 9, and FIG. 11 is a diagram showing the arrangement of spots on the photodetector. . 41 and 51 are light sources, 42a54a is a first diffraction grating,
42b and 54b are second diffraction gratings, 48.63 is an optical recording medium, and 50.65 is a photodetector.
Claims (1)
以って配された第1及び第2の回折格子と、該第1及び
第2の回折格子によって分割された複数のビームを光学
式記録媒体に入射させて得られた複数の出射ビームが入
射せしめられる複数の光検出部から成る光検出器とを有
し、該光検出器から上記第1の回折格子によって分割さ
れた複数のビームに基づいた上記光学式記録媒体上の複
数のトラック部に対応する複数の再生信号及び上記第2
の回折格子によって分割された複数のビームに基づいた
一対の差動トラッキング誤差信号を得る様にしてなる光
学式再生装置。First and second diffraction gratings arranged at a predetermined angle between the gratings on which the beam from the light source is incident, and a plurality of beams split by the first and second diffraction gratings, and an optical recording medium. and a photodetector consisting of a plurality of photodetectors into which a plurality of output beams obtained by making the beams incident on the photodetector are incident, and based on the plurality of beams split from the photodetector by the first diffraction grating. a plurality of reproduction signals corresponding to a plurality of track portions on the optical recording medium and the second
An optical reproducing device configured to obtain a pair of differential tracking error signals based on a plurality of beams split by a diffraction grating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4521483U JPS59153630U (en) | 1983-03-29 | 1983-03-29 | optical playback device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4521483U JPS59153630U (en) | 1983-03-29 | 1983-03-29 | optical playback device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59153630U true JPS59153630U (en) | 1984-10-15 |
Family
ID=30175729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4521483U Pending JPS59153630U (en) | 1983-03-29 | 1983-03-29 | optical playback device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59153630U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6460826A (en) * | 1987-08-31 | 1989-03-07 | Fujitsu General Ltd | Optical disk recording and reproducing device |
-
1983
- 1983-03-29 JP JP4521483U patent/JPS59153630U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6460826A (en) * | 1987-08-31 | 1989-03-07 | Fujitsu General Ltd | Optical disk recording and reproducing device |
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