DE69128312D1 - Optisches Abtastgerät - Google Patents
Optisches AbtastgerätInfo
- Publication number
- DE69128312D1 DE69128312D1 DE69128312T DE69128312T DE69128312D1 DE 69128312 D1 DE69128312 D1 DE 69128312D1 DE 69128312 T DE69128312 T DE 69128312T DE 69128312 T DE69128312 T DE 69128312T DE 69128312 D1 DE69128312 D1 DE 69128312D1
- Authority
- DE
- Germany
- Prior art keywords
- optical scanner
- scanner
- optical
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
-
- 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 Head (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2203516A JPH0487042A (ja) | 1990-07-31 | 1990-07-31 | 光学ピックアップ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69128312D1 true DE69128312D1 (de) | 1998-01-15 |
DE69128312T2 DE69128312T2 (de) | 1998-03-26 |
Family
ID=16475448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69128312T Expired - Fee Related DE69128312T2 (de) | 1990-07-31 | 1991-07-31 | Optisches Abtastgerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US5249167A (de) |
EP (1) | EP0469580B1 (de) |
JP (1) | JPH0487042A (de) |
DE (1) | DE69128312T2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0612719A (ja) * | 1992-06-29 | 1994-01-21 | Canon Inc | 光ヘッド及び情報読取装置 |
JPH06176426A (ja) * | 1992-12-08 | 1994-06-24 | Sony Corp | 光学ピックアップ装置 |
KR100200828B1 (ko) * | 1994-07-30 | 1999-06-15 | 윤종용 | 포커스에러 검출장치 |
JPH08212612A (ja) * | 1994-11-17 | 1996-08-20 | Canon Inc | 光学的情報記録再生装置及び該装置用光ヘッド |
EP0723263A1 (de) * | 1995-01-13 | 1996-07-24 | Goldstar Co. Ltd. | Optisches Abtastgerät für eine magnetooptische Platte |
US5563870A (en) * | 1995-02-14 | 1996-10-08 | Eastman Kodak Company | Optical write/read head with laser power control |
JP3544239B2 (ja) * | 1995-03-04 | 2004-07-21 | ソニー株式会社 | 光学ピツクアツプ及び光記録媒体再生装置 |
EP0731456A2 (de) * | 1995-03-04 | 1996-09-11 | Sony Corporation | Optischer Abtaster und Wiedergabegerät für ein optisches Aufzeichnungsmedium |
JPH09316598A (ja) * | 1996-03-27 | 1997-12-09 | Nippon Steel Corp | 耐摩耗性および溶接性に優れたパーライト系レールおよびその製造法 |
JP3708320B2 (ja) * | 1998-02-04 | 2005-10-19 | 富士通株式会社 | 光情報検出装置 |
JP2002163837A (ja) * | 2000-11-27 | 2002-06-07 | Pioneer Electronic Corp | 光ピックアップ装置及びレーザダイオードチップ |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797868A (en) * | 1985-05-15 | 1989-01-10 | Kabushiki Kaisha Toshiba | Optical system employing a laser beam for focusing, tracking and transferring information signals with respect to a magneto-optical memory |
JPS6214340A (ja) * | 1985-07-11 | 1987-01-22 | Toshiba Corp | 消去可能な光学ヘツド |
JPS62266739A (ja) * | 1986-05-14 | 1987-11-19 | Toshiba Corp | 光学ヘツド |
US4853923A (en) * | 1985-12-12 | 1989-08-01 | Nikon Corporation | Maneto-optical recording apparatus with path length compensated dual photo-electric conversion |
JPS62200542A (ja) * | 1986-02-26 | 1987-09-04 | Toshiba Corp | 光学ヘツド |
US4863246A (en) * | 1986-08-14 | 1989-09-05 | Optical Coating Laboratory, Inc. | Optical system and components for optical disk reader |
JPS6352342A (ja) * | 1986-08-20 | 1988-03-05 | Sony Corp | 光ピツクアツプ |
DE68909663T2 (de) * | 1988-04-26 | 1994-04-07 | Philips Nv | Anordnung zum optischen Abtasten eines magneto-optischen Aufzeichnungsträgers. |
DE69015376T2 (de) * | 1989-01-20 | 1995-05-24 | Matsushita Electric Ind Co Ltd | Optische Kopfanordnung zur Verwendung in einem optischen Scheibensystem. |
-
1990
- 1990-07-31 JP JP2203516A patent/JPH0487042A/ja active Pending
-
1991
- 1991-07-24 US US07/735,381 patent/US5249167A/en not_active Expired - Fee Related
- 1991-07-31 DE DE69128312T patent/DE69128312T2/de not_active Expired - Fee Related
- 1991-07-31 EP EP91112881A patent/EP0469580B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0469580A2 (de) | 1992-02-05 |
JPH0487042A (ja) | 1992-03-19 |
DE69128312T2 (de) | 1998-03-26 |
EP0469580B1 (de) | 1997-12-03 |
EP0469580A3 (en) | 1992-06-10 |
US5249167A (en) | 1993-09-28 |
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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 |