DE69726053D1 - Optischer Kopf - Google Patents

Optischer Kopf

Info

Publication number
DE69726053D1
DE69726053D1 DE69726053T DE69726053T DE69726053D1 DE 69726053 D1 DE69726053 D1 DE 69726053D1 DE 69726053 T DE69726053 T DE 69726053T DE 69726053 T DE69726053 T DE 69726053T DE 69726053 D1 DE69726053 D1 DE 69726053D1
Authority
DE
Germany
Prior art keywords
optical head
optical
head
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
Application number
DE69726053T
Other languages
English (en)
Other versions
DE69726053T2 (de
Inventor
Tomio Mashiyama
Hiroshi Katayama
Nobuo Ogata
Kenji Ikeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE69726053D1 publication Critical patent/DE69726053D1/de
Publication of DE69726053T2 publication Critical patent/DE69726053T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G11B7/08—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
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • G11B7/1353—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
    • G11B7/1362—Mirrors
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE69726053T 1996-06-21 1997-02-13 Optischer Kopf Expired - Fee Related DE69726053T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8162070A JPH1011785A (ja) 1996-06-21 1996-06-21 光学ヘッド
JP16207096 1996-06-21

Publications (2)

Publication Number Publication Date
DE69726053D1 true DE69726053D1 (de) 2003-12-18
DE69726053T2 DE69726053T2 (de) 2004-07-08

Family

ID=15747529

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69726053T Expired - Fee Related DE69726053T2 (de) 1996-06-21 1997-02-13 Optischer Kopf

Country Status (4)

Country Link
US (1) US5737297A (de)
EP (1) EP0814466B1 (de)
JP (1) JPH1011785A (de)
DE (1) DE69726053T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6185166B1 (en) 1993-06-21 2001-02-06 Fujitsu Limited Optical information recording/reproducing apparatus
JPH10269616A (ja) * 1997-03-19 1998-10-09 Fujitsu Ltd 光ピックアップ
JPH11161973A (ja) * 1997-09-24 1999-06-18 Fujitsu Ltd 光学的情報記録／再生装置
CN1112685C (zh) 1998-04-14 2003-06-25 德国汤姆森-布兰特有限公司 读写光学记录介质的设备
US6940676B1 (en) * 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
US6822934B2 (en) * 2000-06-21 2004-11-23 Matsushita Electric Industrial Co., Ltd. Optical disc apparatus for finding a tracking error for an optical disk
KR100463424B1 (ko) * 2002-10-04 2004-12-23 삼성전기주식회사 광 픽업장치의 광검출기

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870436A (ja) * 1981-10-22 1983-04-26 Toshiba Corp 光学ヘツド
JPS5936337A (ja) * 1982-08-20 1984-02-28 Toshiba Corp 光学ヘツド
JPS634435A (ja) * 1986-06-23 1988-01-09 Toshiba Corp 光学的情報処理装置
JPS63306537A (ja) * 1987-06-08 1988-12-14 Mitsubishi Electric Corp 光記録再生ヘツド装置
US5202869A (en) * 1990-04-20 1993-04-13 Sharp Kabushiki Kaisha Optical head device including diffraction grating
JP3112735B2 (ja) * 1992-02-28 2000-11-27 パイオニア株式会社 光ピックアップ装置
JPH05307759A (ja) * 1992-04-28 1993-11-19 Olympus Optical Co Ltd 光ピックアップ
JP3115761B2 (ja) * 1994-02-16 2000-12-11 シャープ株式会社 光学ヘッド
JPH07326083A (ja) * 1994-06-01 1995-12-12 Olympus Optical Co Ltd 光情報再生装置

Also Published As

Publication number Publication date
DE69726053T2 (de) 2004-07-08
US5737297A (en) 1998-04-07
EP0814466A3 (de) 1998-07-08
EP0814466A2 (de) 1997-12-29
JPH1011785A (ja) 1998-01-16
EP0814466B1 (de) 2003-11-12

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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