JPS5774841A - Control signal detector of optical information reader - Google Patents
Control signal detector of optical information readerInfo
- Publication number
- JPS5774841A JPS5774841A JP5999681A JP5999681A JPS5774841A JP S5774841 A JPS5774841 A JP S5774841A JP 5999681 A JP5999681 A JP 5999681A JP 5999681 A JP5999681 A JP 5999681A JP S5774841 A JPS5774841 A JP S5774841A
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- circuit
- photodetecting
- signals
- differential photodiode
- 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
- 230000003287 optical effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
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
- G11B7/0938—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 servo format, e.g. guide tracks, pilot signals
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5999681A JPS5774841A (en) | 1981-04-20 | 1981-04-20 | Control signal detector of optical information reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5999681A JPS5774841A (en) | 1981-04-20 | 1981-04-20 | Control signal detector of optical information reader |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49031720A Division JPS5123900B2 (OSRAM) | 1974-03-20 | 1974-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5774841A true JPS5774841A (en) | 1982-05-11 |
| JPS6233650B2 JPS6233650B2 (OSRAM) | 1987-07-22 |
Family
ID=13129282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5999681A Granted JPS5774841A (en) | 1981-04-20 | 1981-04-20 | Control signal detector of optical information reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5774841A (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231739A (ja) * | 1983-06-14 | 1984-12-26 | Matsushita Electric Ind Co Ltd | 焦点制御装置 |
-
1981
- 1981-04-20 JP JP5999681A patent/JPS5774841A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231739A (ja) * | 1983-06-14 | 1984-12-26 | Matsushita Electric Ind Co Ltd | 焦点制御装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6233650B2 (OSRAM) | 1987-07-22 |
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