JPS53132308A - Focus controller of optical reproducer - Google Patents
Focus controller of optical reproducerInfo
- Publication number
- JPS53132308A JPS53132308A JP4704277A JP4704277A JPS53132308A JP S53132308 A JPS53132308 A JP S53132308A JP 4704277 A JP4704277 A JP 4704277A JP 4704277 A JP4704277 A JP 4704277A JP S53132308 A JPS53132308 A JP S53132308A
- Authority
- JP
- Japan
- Prior art keywords
- focus controller
- servo control
- optical reproducer
- reproducer
- optical
- 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
- Automatic Focus Adjustment (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
PURPOSE: To surely and sufficiently perform focus controlling by supplying search signal to a servo control circuit when the opposing distance of a recording disc and an objective lens goes out of a servo control drawing range.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4704277A JPS53132308A (en) | 1977-04-22 | 1977-04-22 | Focus controller of optical reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4704277A JPS53132308A (en) | 1977-04-22 | 1977-04-22 | Focus controller of optical reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53132308A true JPS53132308A (en) | 1978-11-18 |
Family
ID=12764101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4704277A Pending JPS53132308A (en) | 1977-04-22 | 1977-04-22 | Focus controller of optical reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53132308A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111136A (en) * | 1980-02-01 | 1981-09-02 | Pioneer Video Corp | Protective device for reader of optical disc player |
JPS57133525A (en) * | 1981-02-07 | 1982-08-18 | Olympus Optical Co Ltd | Automatic focusing system of optical information reader |
JPS59500884A (en) * | 1982-05-19 | 1984-05-17 | バロ−ス・コ−ポレ−ション | Optical memory system with improved position and focus control circuitry |
JPS59500885A (en) * | 1982-05-19 | 1984-05-17 | バロ−ス・コ−ポレ−ション | Focus control circuit for optical memory system |
JPS59127238A (en) * | 1982-12-30 | 1984-07-23 | Sony Corp | Optical information recorder |
JPH05109085A (en) * | 1991-10-16 | 1993-04-30 | Mitsubishi Electric Corp | Focus controller |
-
1977
- 1977-04-22 JP JP4704277A patent/JPS53132308A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111136A (en) * | 1980-02-01 | 1981-09-02 | Pioneer Video Corp | Protective device for reader of optical disc player |
JPS57133525A (en) * | 1981-02-07 | 1982-08-18 | Olympus Optical Co Ltd | Automatic focusing system of optical information reader |
JPS59500884A (en) * | 1982-05-19 | 1984-05-17 | バロ−ス・コ−ポレ−ション | Optical memory system with improved position and focus control circuitry |
JPS59500885A (en) * | 1982-05-19 | 1984-05-17 | バロ−ス・コ−ポレ−ション | Focus control circuit for optical memory system |
JPS59127238A (en) * | 1982-12-30 | 1984-07-23 | Sony Corp | Optical information recorder |
JPH0438050B2 (en) * | 1982-12-30 | 1992-06-23 | Sony Corp | |
JPH05109085A (en) * | 1991-10-16 | 1993-04-30 | Mitsubishi Electric Corp | Focus controller |
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