DE3368794D1 - Optical memory system having improved positioning and focusing control circuitry - Google Patents
Optical memory system having improved positioning and focusing control circuitryInfo
- Publication number
- DE3368794D1 DE3368794D1 DE8383302780T DE3368794T DE3368794D1 DE 3368794 D1 DE3368794 D1 DE 3368794D1 DE 8383302780 T DE8383302780 T DE 8383302780T DE 3368794 T DE3368794 T DE 3368794T DE 3368794 D1 DE3368794 D1 DE 3368794D1
- Authority
- DE
- Germany
- Prior art keywords
- control circuitry
- memory system
- optical memory
- focusing control
- improved positioning
- 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
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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08523—Methods for track change, selection or preliminary positioning by moving the head with both tracking and focusing pull-in
-
- 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
-
- 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
-
- 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
- G11B7/0946—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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37998082A | 1982-05-19 | 1982-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3368794D1 true DE3368794D1 (en) | 1987-02-05 |
Family
ID=23499465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8383302780T Expired DE3368794D1 (en) | 1982-05-19 | 1983-05-17 | Optical memory system having improved positioning and focusing control circuitry |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0096969B1 (de) |
CA (1) | CA1200608A (de) |
DE (1) | DE3368794D1 (de) |
WO (1) | WO1983004134A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3546771C2 (de) * | 1984-04-27 | 1993-08-12 | Pioneer Electronic Corp., Tokio/Tokyo, Jp | |
EP0245821A3 (en) * | 1986-05-12 | 1988-07-20 | Csk Corporation | Data record formatting system and reading/writing system for optical recording medium |
US4795958A (en) * | 1986-09-20 | 1989-01-03 | Pioneer Electronic Corporation | Servomechanism for recording disk reproducing system |
NL8702261A (nl) * | 1987-09-23 | 1989-04-17 | Philips Nv | Informatie opteken en/of uitlees systeem, alsmede een registratiedrager en opteken en/of uitleesinrichting voor toepassing in een dergelijk systeem. |
NL8803012A (nl) * | 1988-12-08 | 1990-07-02 | Philips Nv | Optische aftastinrichting voorzien van een focusseerregelsysteem alsmede een geintegreerde schakeling voor toepassing in het focusseerregelsysteem. |
US5319623A (en) * | 1989-06-19 | 1994-06-07 | Matsushita Electric Industrial Co., Ltd. | Data-track search apparatus for locating a desired data track on a record carrier |
JP3143513B2 (ja) * | 1992-02-25 | 2001-03-07 | キヤノン株式会社 | 光学的情報記録再生装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3932700A (en) * | 1974-02-04 | 1976-01-13 | Zenith Radio Corporation | Focus tracking registration for optical reproducing systems |
FR2330062A1 (fr) * | 1975-10-31 | 1977-05-27 | Thomson Brandt | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif |
FR2349191A1 (fr) * | 1976-04-23 | 1977-11-18 | Thomson Brandt | Lecteur optique de disque d'information comportant un dispositif d'acces automatique aux informations |
FR2396379A1 (fr) * | 1977-07-01 | 1979-01-26 | Thomson Brandt | Lecteur optique de disque d'information muni d'un dispositif d'acces automatique aux informations |
SE7813460L (sv) * | 1978-03-27 | 1979-09-28 | Mca Disco Vision | Videoskivspelare |
US4375091A (en) * | 1978-06-30 | 1983-02-22 | Discovision Associates | Method and apparatus for information retrieval from an optically readable storage medium |
JPS5611673A (en) * | 1979-07-03 | 1981-02-05 | Pioneer Video Corp | Address information retrieval method in information recording medium reproducing unit |
JPS5694528A (en) * | 1979-12-28 | 1981-07-31 | Matsushita Electric Ind Co Ltd | Drawing-in method of focus servo |
-
1983
- 1983-05-17 DE DE8383302780T patent/DE3368794D1/de not_active Expired
- 1983-05-17 EP EP19830302780 patent/EP0096969B1/de not_active Expired
- 1983-05-18 CA CA000428453A patent/CA1200608A/en not_active Expired
- 1983-05-19 WO PCT/US1983/000769 patent/WO1983004134A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO1983004134A1 (en) | 1983-11-24 |
EP0096969A1 (de) | 1983-12-28 |
CA1200608A (en) | 1986-02-11 |
EP0096969B1 (de) | 1986-12-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8328 | Change in the person/name/address of the agent |
Free format text: EISENFUEHR, G., DIPL.-ING. SPEISER, D., DIPL.-ING. RABUS, W., DR.-ING., PAT.-ANW., 2800 BREMEN |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |