JPS53112705A - Optical system information reproducer - Google Patents
Optical system information reproducerInfo
- Publication number
- JPS53112705A JPS53112705A JP2821877A JP2821877A JPS53112705A JP S53112705 A JPS53112705 A JP S53112705A JP 2821877 A JP2821877 A JP 2821877A JP 2821877 A JP2821877 A JP 2821877A JP S53112705 A JPS53112705 A JP S53112705A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- system information
- information reproducer
- reproducer
- applying
- 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
Abstract
PURPOSE: To perform signal detection and out-of-focus detection simultaneously by a main beam by applying the differential signal of two photo detectors to a moving device and controlling the distance between a recording carrier and a condenser lens.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2821877A JPS53112705A (en) | 1977-03-14 | 1977-03-14 | Optical system information reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2821877A JPS53112705A (en) | 1977-03-14 | 1977-03-14 | Optical system information reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53112705A true JPS53112705A (en) | 1978-10-02 |
Family
ID=12242478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2821877A Pending JPS53112705A (en) | 1977-03-14 | 1977-03-14 | Optical system information reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53112705A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58209722A (en) * | 1982-05-31 | 1983-12-06 | Olympus Optical Co Ltd | Detecting and setting device of focusing |
JPS58211108A (en) * | 1982-06-02 | 1983-12-08 | Olympus Optical Co Ltd | Focusing detector and setter for endoscope |
JPS59162514A (en) * | 1983-03-08 | 1984-09-13 | Dainippon Screen Mfg Co Ltd | Focus adjusting method of image scanning and recording device |
JPS60217535A (en) * | 1984-04-11 | 1985-10-31 | Sony Corp | Focus detector |
JPS61195521U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS63298720A (en) * | 1987-05-28 | 1988-12-06 | Matsushita Electric Ind Co Ltd | Focus controller |
JPH0278025A (en) * | 1988-09-14 | 1990-03-19 | Copal Co Ltd | Optical pickup device |
JPH0836762A (en) * | 1995-03-17 | 1996-02-06 | Hitachi Ltd | Optical disk apparatus |
-
1977
- 1977-03-14 JP JP2821877A patent/JPS53112705A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58209722A (en) * | 1982-05-31 | 1983-12-06 | Olympus Optical Co Ltd | Detecting and setting device of focusing |
JPS58211108A (en) * | 1982-06-02 | 1983-12-08 | Olympus Optical Co Ltd | Focusing detector and setter for endoscope |
JPS59162514A (en) * | 1983-03-08 | 1984-09-13 | Dainippon Screen Mfg Co Ltd | Focus adjusting method of image scanning and recording device |
JPS60217535A (en) * | 1984-04-11 | 1985-10-31 | Sony Corp | Focus detector |
JPH0534732B2 (en) * | 1984-04-11 | 1993-05-24 | Sony Corp | |
JPS61195521U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS63298720A (en) * | 1987-05-28 | 1988-12-06 | Matsushita Electric Ind Co Ltd | Focus controller |
JPH0278025A (en) * | 1988-09-14 | 1990-03-19 | Copal Co Ltd | Optical pickup device |
JPH0836762A (en) * | 1995-03-17 | 1996-02-06 | Hitachi Ltd | Optical disk apparatus |
JP2685015B2 (en) * | 1995-03-17 | 1997-12-03 | 株式会社日立製作所 | Optical disk drive |
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