DE69120624D1 - Fokusfehlerdetektionsgerät - Google Patents
FokusfehlerdetektionsgerätInfo
- Publication number
- DE69120624D1 DE69120624D1 DE69120624T DE69120624T DE69120624D1 DE 69120624 D1 DE69120624 D1 DE 69120624D1 DE 69120624 T DE69120624 T DE 69120624T DE 69120624 T DE69120624 T DE 69120624T DE 69120624 D1 DE69120624 D1 DE 69120624D1
- Authority
- DE
- Germany
- Prior art keywords
- detection device
- error detection
- focus error
- focus
- error
- 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 - Lifetime
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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2258046A JP2591302B2 (ja) | 1990-09-26 | 1990-09-26 | フォーカスエラー検出装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69120624D1 true DE69120624D1 (de) | 1996-08-08 |
DE69120624T2 DE69120624T2 (de) | 1997-03-06 |
Family
ID=17314794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69120624T Expired - Lifetime DE69120624T2 (de) | 1990-09-26 | 1991-09-24 | Fokusfehlerdetektionsgerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US5144606A (de) |
EP (1) | EP0477847B1 (de) |
JP (1) | JP2591302B2 (de) |
DE (1) | DE69120624T2 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0772944B2 (ja) * | 1991-05-30 | 1995-08-02 | ティアック株式会社 | 光ディスク装置のエラー信号生成装置 |
KR950005033B1 (ko) * | 1992-11-06 | 1995-05-17 | 주식회사금성사 | 광픽업 장치 |
JP3618769B2 (ja) * | 1992-12-01 | 2005-02-09 | キヤノン株式会社 | 光学式情報記録再生装置 |
US5559784A (en) * | 1993-03-26 | 1996-09-24 | Fuji Xerox Co., Ltd. | Multi-layer optical information detection by two laser beam and optical multilayer recording medium |
KR100335408B1 (ko) * | 1998-03-03 | 2002-08-21 | 삼성전자 주식회사 | 포커스옵셋조정가능한광픽업장치 |
JP2000182253A (ja) * | 1998-12-15 | 2000-06-30 | Sony Corp | 情報記録再生装置 |
CN101116141A (zh) | 2005-02-03 | 2008-01-30 | 皇家飞利浦电子股份有限公司 | 用于多束光学扫描设备的光点尺寸的聚焦误差检测 |
US9921399B2 (en) | 2015-03-31 | 2018-03-20 | General Electric Company | System and method for continuous, asynchronous autofocus of optical instruments |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5922289B2 (ja) * | 1975-11-20 | 1984-05-25 | ソニー株式会社 | ジヨウホウケンシユツソウチ |
JPS6043234A (ja) * | 1983-08-18 | 1985-03-07 | Mitsubishi Electric Corp | 光デイスクヘツドのフオ−カスずれ検出装置 |
JPS6059545A (ja) * | 1983-09-12 | 1985-04-05 | Mitsubishi Electric Corp | 光ヘッドの焦点ずれ検出装置 |
JPS613330A (ja) * | 1984-06-15 | 1986-01-09 | Matsushita Electric Ind Co Ltd | 光学的記録再生ヘツド |
US4724533A (en) * | 1984-06-15 | 1988-02-09 | Matsushita Electric Industrial Co., Ltd. | Optical head |
DE3546796C2 (de) * | 1984-10-01 | 1993-09-23 | Mitsubishi Denki K.K., Tokio/Tokyo, Jp | |
NL8403034A (nl) * | 1984-10-05 | 1986-05-01 | Philips Nv | Opto-elektronisch fokusfout-detektiestelsel. |
JPH0231337A (ja) * | 1988-07-21 | 1990-02-01 | Mitsubishi Electric Corp | 焦点誤差検出装置 |
NL8802689A (nl) * | 1988-11-03 | 1990-06-01 | Koninkl Philips Electronics Nv | Inrichting voor het met optische straling aftasten van een stralingsreflekterend oppervlak. |
-
1990
- 1990-09-26 JP JP2258046A patent/JP2591302B2/ja not_active Expired - Lifetime
-
1991
- 1991-09-20 US US07/762,989 patent/US5144606A/en not_active Expired - Lifetime
- 1991-09-24 EP EP91116216A patent/EP0477847B1/de not_active Expired - Lifetime
- 1991-09-24 DE DE69120624T patent/DE69120624T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04134309A (ja) | 1992-05-08 |
JP2591302B2 (ja) | 1997-03-19 |
EP0477847A3 (en) | 1992-05-27 |
EP0477847A2 (de) | 1992-04-01 |
EP0477847B1 (de) | 1996-07-03 |
US5144606A (en) | 1992-09-01 |
DE69120624T2 (de) | 1997-03-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8332 | No legal effect for de | ||
8370 | Indication of lapse of patent is to be deleted | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: PANASONIC CORP., KADOMA, OSAKA, JP |