JPS6233650B2 - - Google Patents
Info
- Publication number
- JPS6233650B2 JPS6233650B2 JP5999681A JP5999681A JPS6233650B2 JP S6233650 B2 JPS6233650 B2 JP S6233650B2 JP 5999681 A JP5999681 A JP 5999681A JP 5999681 A JP5999681 A JP 5999681A JP S6233650 B2 JPS6233650 B2 JP S6233650B2
- Authority
- JP
- Japan
- Prior art keywords
- information
- light
- beam spot
- signal
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 19
- 230000005236 sound signal Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010291 electrical method Methods 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 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 (enrdf_load_html_response) | 1974-03-20 | 1974-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5774841A JPS5774841A (en) | 1982-05-11 |
| JPS6233650B2 true JPS6233650B2 (enrdf_load_html_response) | 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 (enrdf_load_html_response) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0685229B2 (ja) * | 1983-06-14 | 1994-10-26 | 松下電器産業株式会社 | 焦点制御装置 |
-
1981
- 1981-04-20 JP JP5999681A patent/JPS5774841A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5774841A (en) | 1982-05-11 |
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