DE68915565D1 - Optisches Informationsverarbeitungsgerät. - Google Patents
Optisches Informationsverarbeitungsgerät.Info
- Publication number
- DE68915565D1 DE68915565D1 DE68915565T DE68915565T DE68915565D1 DE 68915565 D1 DE68915565 D1 DE 68915565D1 DE 68915565 T DE68915565 T DE 68915565T DE 68915565 T DE68915565 T DE 68915565T DE 68915565 D1 DE68915565 D1 DE 68915565D1
- Authority
- DE
- Germany
- Prior art keywords
- information processing
- processing device
- optical information
- optical
- processing
- 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 - Fee Related
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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
-
- 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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3282988 | 1988-02-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68915565D1 true DE68915565D1 (de) | 1994-07-07 |
DE68915565T2 DE68915565T2 (de) | 1994-09-29 |
Family
ID=12369715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68915565T Expired - Fee Related DE68915565T2 (de) | 1988-02-17 | 1989-02-16 | Optisches Informationsverarbeitungsgerät. |
Country Status (3)
Country | Link |
---|---|
US (1) | US5029151A (de) |
EP (1) | EP0329431B1 (de) |
DE (1) | DE68915565T2 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE19630887A1 (de) * | 1996-07-31 | 1998-02-05 | Thomson Brandt Gmbh | Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger |
JP3848731B2 (ja) * | 1997-04-21 | 2006-11-22 | パイオニア株式会社 | 光ヘッド |
JP2002230799A (ja) * | 2001-02-05 | 2002-08-16 | Funai Electric Co Ltd | アクチュエータ回路 |
CN114487971B (zh) * | 2022-04-02 | 2022-07-08 | 武汉地震工程研究院有限公司 | 一种改进的微型阻抗测量自校准算法和装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5897730U (ja) * | 1981-12-24 | 1983-07-02 | ヤマハ株式会社 | 光学式情報記録再生装置における自動焦点装置 |
JPS61104337A (ja) * | 1984-10-24 | 1986-05-22 | Hitachi Ltd | 光学的情報記録再生装置 |
JPS61222035A (ja) * | 1985-03-28 | 1986-10-02 | Matsushita Electric Ind Co Ltd | 光情報記録再生装置 |
JPH07111819B2 (ja) * | 1985-11-08 | 1995-11-29 | ソニー株式会社 | 回転記録媒体のサーボ装置 |
KR870006556A (ko) * | 1985-12-13 | 1987-07-13 | 미쓰다 가쓰시게 | 트랙킹서보 제어장치 |
US4853917A (en) * | 1986-04-25 | 1989-08-01 | Canon Kabushiki Kaisha | Optical tracking apparatus with photodetector disposed outside part of the effective diameter of the lens system |
CA1301324C (en) * | 1986-05-20 | 1992-05-19 | Hideki Hosoya | Optical information recording and reproducing apparatus |
JPS63825A (ja) * | 1986-06-19 | 1988-01-05 | Sharp Corp | 光情報記録再生装置 |
US4860271A (en) * | 1987-03-13 | 1989-08-22 | Pioneer Electronic Corporation | Servo circuit for generating a tracking error signal for optical disk player |
US4974221A (en) * | 1987-07-17 | 1990-11-27 | Canon Kabushiki Kaisha | Method and apparatus for reproducing information by varying a sensitivity of a phase-locked loop in accordance with a detection state of a reproduced signal |
-
1989
- 1989-02-14 US US07/310,196 patent/US5029151A/en not_active Expired - Lifetime
- 1989-02-16 DE DE68915565T patent/DE68915565T2/de not_active Expired - Fee Related
- 1989-02-16 EP EP89301472A patent/EP0329431B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0329431B1 (de) | 1994-06-01 |
EP0329431A2 (de) | 1989-08-23 |
US5029151A (en) | 1991-07-02 |
DE68915565T2 (de) | 1994-09-29 |
EP0329431A3 (de) | 1991-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |