DE3405433C2 - - Google Patents
Info
- Publication number
- DE3405433C2 DE3405433C2 DE3405433A DE3405433A DE3405433C2 DE 3405433 C2 DE3405433 C2 DE 3405433C2 DE 3405433 A DE3405433 A DE 3405433A DE 3405433 A DE3405433 A DE 3405433A DE 3405433 C2 DE3405433 C2 DE 3405433C2
- Authority
- DE
- Germany
- 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
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
- G11B7/0912—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 by push-pull method
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/133—Shape of individual detector elements
-
- 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
- G11B7/0901—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 track following only
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983021331U JPS59125727U (ja) | 1983-02-15 | 1983-02-15 | 光学式情報ピツクアツプ装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3405433A1 DE3405433A1 (de) | 1984-08-16 |
| DE3405433C2 true DE3405433C2 (de) | 1987-04-02 |
Family
ID=12052150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19843405433 Granted DE3405433A1 (de) | 1983-02-15 | 1984-02-15 | Optisches abtastgeraet zum abtasten von informationen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4633454A (de) |
| JP (1) | JPS59125727U (de) |
| DE (1) | DE3405433A1 (de) |
| FR (1) | FR2541029B1 (de) |
| GB (1) | GB2137744B (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499569A (en) * | 1982-09-07 | 1985-02-12 | Discovision Associates | Writing beam focus monitor |
| GB2175390A (en) * | 1985-05-14 | 1986-11-26 | Coal Ind | Probe for sensing outlines |
| JPS63257925A (ja) * | 1987-04-15 | 1988-10-25 | Nippon Coinco:Kk | 光ヘツドの焦点制御信号検出装置 |
| JPS63285732A (ja) * | 1987-05-19 | 1988-11-22 | Pioneer Electronic Corp | 光学式ピックアップ装置 |
| JP2887273B2 (ja) * | 1987-05-22 | 1999-04-26 | パイオニア株式会社 | 光学式ピックアップ装置 |
| US4958245A (en) * | 1988-04-07 | 1990-09-18 | Insite Peripherals, Inc. | Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7703076A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
| NL7706753A (nl) * | 1977-03-23 | 1978-12-22 | Philips Nv | Inrichting voor het uitlezen van een optische stralingsreflekterende informatiedrager. |
| GB1603596A (en) * | 1977-06-06 | 1981-11-25 | Mca Disco Vision | Optical transducer and focusing system |
| JPS55125547A (en) * | 1979-03-19 | 1980-09-27 | Matsushita Electric Ind Co Ltd | Light detecting unit |
| JPS55125417A (en) * | 1979-03-20 | 1980-09-27 | Matsushita Electric Ind Co Ltd | Photodetector |
| US4445209A (en) * | 1979-08-27 | 1984-04-24 | Discovision Associates | Dithered focusing systems |
| US4357533A (en) * | 1980-07-14 | 1982-11-02 | Discovision Associates | Focus detector for an optical disc playback system |
| JPS57111837A (en) * | 1980-12-27 | 1982-07-12 | Olympus Optical Co Ltd | Signal detecting system of optical information reader |
| US4414658A (en) * | 1981-06-12 | 1983-11-08 | Mcdonnell Douglas Corporation | Linear tracking arrangement in a photographic disc type information containing system |
| JPS58200440A (ja) * | 1982-05-19 | 1983-11-22 | Sony Corp | 光学的読取装置 |
-
1983
- 1983-02-15 JP JP1983021331U patent/JPS59125727U/ja active Granted
-
1984
- 1984-02-14 GB GB08403834A patent/GB2137744B/en not_active Expired
- 1984-02-15 US US06/580,308 patent/US4633454A/en not_active Expired - Lifetime
- 1984-02-15 FR FR8402311A patent/FR2541029B1/fr not_active Expired
- 1984-02-15 DE DE19843405433 patent/DE3405433A1/de active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0320911Y2 (de) | 1991-05-07 |
| US4633454A (en) | 1986-12-30 |
| GB2137744B (en) | 1986-04-23 |
| DE3405433A1 (de) | 1984-08-16 |
| FR2541029B1 (fr) | 1987-05-22 |
| JPS59125727U (ja) | 1984-08-24 |
| GB2137744A (en) | 1984-10-10 |
| FR2541029A1 (fr) | 1984-08-17 |
| GB8403834D0 (en) | 1984-03-21 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8120 | Willingness to grant licences paragraph 23 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |