HK1007034A1 - Optical head and optical recording and reproducing device - Google Patents
Optical head and optical recording and reproducing deviceInfo
- Publication number
- HK1007034A1 HK1007034A1 HK98106227A HK98106227A HK1007034A1 HK 1007034 A1 HK1007034 A1 HK 1007034A1 HK 98106227 A HK98106227 A HK 98106227A HK 98106227 A HK98106227 A HK 98106227A HK 1007034 A1 HK1007034 A1 HK 1007034A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- optical
- reproducing device
- optical recording
- optical head
- head
- Prior art date
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
-
- 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
-
- 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
- G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
-
- 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
- G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
-
- 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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18968490 | 1990-07-18 | ||
JP28405190 | 1990-10-22 | ||
JP3020046A JP3028854B2 (ja) | 1990-07-18 | 1991-02-13 | 光ヘッド及び光記憶再生装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1007034A1 true HK1007034A1 (en) | 1999-03-26 |
Family
ID=27282875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK98106227A HK1007034A1 (en) | 1990-07-18 | 1998-06-23 | Optical head and optical recording and reproducing device |
Country Status (6)
Country | Link |
---|---|
US (1) | US5436876A (ko) |
EP (1) | EP0467216B1 (ko) |
JP (1) | JP3028854B2 (ko) |
KR (1) | KR0164859B1 (ko) |
DE (1) | DE69119658T2 (ko) |
HK (1) | HK1007034A1 (ko) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5673241A (en) * | 1991-11-08 | 1997-09-30 | Seiko Epson Corporation | Focus detection mechanism and optical head and optical storage device that use it |
US5465247A (en) * | 1992-05-14 | 1995-11-07 | Olympus Optical Co., Ltd. | Optical head |
JPH07176095A (ja) * | 1993-06-25 | 1995-07-14 | Nec Corp | 光磁気ヘッド装置 |
KR970004210B1 (ko) * | 1994-06-10 | 1997-03-26 | 엘지전자 주식회사 | 광픽업 장치 |
JP2942718B2 (ja) * | 1994-10-05 | 1999-08-30 | 富士通株式会社 | 光学的情報記録再生装置 |
KR970700356A (ko) * | 1994-11-10 | 1997-01-08 | 이데이 노부유키 | 광 픽업 장치 및 광학 디스크 드라이브 장치(Optical pickup apparatus and optical disk drive apparatus) |
WO1997023871A1 (en) * | 1995-12-21 | 1997-07-03 | Philips Electronics N.V. | Optical scanning device |
EP0845142A1 (en) * | 1995-12-27 | 1998-06-03 | Koninklijke Philips Electronics N.V. | Device for scanning an optically readable record carrier |
EP0812458B1 (en) * | 1995-12-27 | 2002-06-12 | Koninklijke Philips Electronics N.V. | Apparatus for scanning an optically readable record carrier |
WO1997024717A1 (en) * | 1995-12-27 | 1997-07-10 | Philips Electronics N.V. | Device for scanning an optically readable record carrier |
WO1999024974A2 (en) * | 1997-11-07 | 1999-05-20 | Koninklijke Philips Electronics N.V. | Optical scanning device |
JP3521738B2 (ja) | 1998-04-08 | 2004-04-19 | 日本ビクター株式会社 | 光ピックアップ装置、エラー検出装置及びその検出方法 |
JP3691274B2 (ja) | 1999-02-10 | 2005-09-07 | ローム株式会社 | 光ピックアップおよびホログラム素子 |
KR100430276B1 (ko) * | 2001-02-06 | 2004-05-04 | 엘지전자 주식회사 | 비점 수차법을 이용한 광픽업 장치 |
JP4032732B2 (ja) * | 2001-12-20 | 2008-01-16 | ソニー株式会社 | 光ピックアップ装置 |
JP4037281B2 (ja) * | 2002-03-04 | 2008-01-23 | シャープ株式会社 | ビーム整形素子およびそれを用いた光源ユニット並びに光ピックアップ |
NL1036702A1 (nl) * | 2008-04-15 | 2009-10-19 | Asml Holding Nv | Diffraction elements for alignment targets. |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4065786A (en) * | 1975-09-30 | 1977-12-27 | Rca Corporation | Videodisc playback system |
JPS5690434A (en) * | 1979-12-19 | 1981-07-22 | Hitachi Ltd | Optical information reproducing device |
JPS5753831A (en) * | 1980-09-12 | 1982-03-31 | Olympus Optical Co Ltd | Method and device for reproduction of optical information |
JPS5774837A (en) * | 1980-10-25 | 1982-05-11 | Olympus Optical Co Ltd | Signal detection system of optical information reproducing device |
EP0186044B1 (en) * | 1984-12-17 | 1991-03-06 | Sanyo Electric Co., Ltd. | Photodetector |
DE3679648D1 (de) * | 1985-12-10 | 1991-07-11 | Nec Corp | Optischer kopf mit einem beugungsgitter zum richten von zwei oder mehreren gebeugten lichtstrahlen auf optische detektoren. |
DE3882872T2 (de) * | 1987-10-05 | 1993-11-11 | Matsushita Electric Ind Co Ltd | Optische Lesekopf. |
JPH0770065B2 (ja) * | 1988-04-20 | 1995-07-31 | シャープ株式会社 | 光ピックアップ装置 |
US4983017A (en) * | 1988-08-02 | 1991-01-08 | Sharp Kabushiki Kaisha | Optical head device for reading information stored in a recording medium |
JPH0758559B2 (ja) * | 1988-09-02 | 1995-06-21 | シャープ株式会社 | 光ピックアップ装置 |
US5049732A (en) * | 1988-10-21 | 1991-09-17 | Sharp Kabushiki Kaisha | Optical pickup device with diffraction device |
NL8802988A (nl) * | 1988-12-05 | 1990-07-02 | Philips Nv | Inrichting voor het met optische straling aftasten van een informatievlak. |
US5113386A (en) * | 1989-10-30 | 1992-05-12 | Eastman Kodak Company | Focus and tracking error detector apparatus for optical and magneto-optical information storage systems |
US5180909A (en) * | 1990-04-27 | 1993-01-19 | Victor Company Of Japan, Ltd. | Optical pickup using diffracted light |
-
1991
- 1991-02-13 JP JP3020046A patent/JP3028854B2/ja not_active Expired - Lifetime
- 1991-07-10 DE DE69119658T patent/DE69119658T2/de not_active Expired - Lifetime
- 1991-07-10 EP EP91111524A patent/EP0467216B1/en not_active Expired - Lifetime
- 1991-07-18 KR KR1019910012256A patent/KR0164859B1/ko not_active IP Right Cessation
-
1993
- 1993-12-08 US US08/162,902 patent/US5436876A/en not_active Expired - Lifetime
-
1998
- 1998-06-23 HK HK98106227A patent/HK1007034A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH04212742A (ja) | 1992-08-04 |
EP0467216A3 (en) | 1992-09-30 |
EP0467216B1 (en) | 1996-05-22 |
EP0467216A2 (en) | 1992-01-22 |
JP3028854B2 (ja) | 2000-04-04 |
KR0164859B1 (ko) | 1999-03-20 |
DE69119658T2 (de) | 1997-01-09 |
US5436876A (en) | 1995-07-25 |
KR920003272A (ko) | 1992-02-29 |
DE69119658D1 (de) | 1996-06-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PE | Patent expired |
Effective date: 20110709 |