JPS57186240A - Optical reproducing device - Google Patents
Optical reproducing deviceInfo
- Publication number
- JPS57186240A JPS57186240A JP17924181A JP17924181A JPS57186240A JP S57186240 A JPS57186240 A JP S57186240A JP 17924181 A JP17924181 A JP 17924181A JP 17924181 A JP17924181 A JP 17924181A JP S57186240 A JPS57186240 A JP S57186240A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- condenser lens
- interval
- read
- light beam
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17924181A JPS57186240A (en) | 1981-11-09 | 1981-11-09 | Optical reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17924181A JPS57186240A (en) | 1981-11-09 | 1981-11-09 | Optical reproducing device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13988676A Division JPS5364503A (en) | 1976-11-19 | 1976-11-19 | Optical recorder reproducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57186240A true JPS57186240A (en) | 1982-11-16 |
JPS6218974B2 JPS6218974B2 (ja) | 1987-04-25 |
Family
ID=16062404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17924181A Granted JPS57186240A (en) | 1981-11-09 | 1981-11-09 | Optical reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57186240A (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5364503A (en) * | 1976-11-19 | 1978-06-09 | Teac Corp | Optical recorder reproducer |
JPS53118103A (en) * | 1977-03-23 | 1978-10-16 | Philips Nv | Optical radiation reflection type information carrier reader |
JPS5683848A (en) * | 1979-12-11 | 1981-07-08 | Matsushita Electric Ind Co Ltd | Focusing device |
-
1981
- 1981-11-09 JP JP17924181A patent/JPS57186240A/ja active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5364503A (en) * | 1976-11-19 | 1978-06-09 | Teac Corp | Optical recorder reproducer |
JPS53118103A (en) * | 1977-03-23 | 1978-10-16 | Philips Nv | Optical radiation reflection type information carrier reader |
JPS5683848A (en) * | 1979-12-11 | 1981-07-08 | Matsushita Electric Ind Co Ltd | Focusing device |
Also Published As
Publication number | Publication date |
---|---|
JPS6218974B2 (ja) | 1987-04-25 |
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