DE69701905D1 - Photodetektor für optischen Kopf - Google Patents

Photodetektor für optischen Kopf

Info

Publication number
DE69701905D1
DE69701905D1 DE69701905T DE69701905T DE69701905D1 DE 69701905 D1 DE69701905 D1 DE 69701905D1 DE 69701905 T DE69701905 T DE 69701905T DE 69701905 T DE69701905 T DE 69701905T DE 69701905 D1 DE69701905 D1 DE 69701905D1
Authority
DE
Germany
Prior art keywords
optical head
photodetector
head photodetector
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 - Lifetime
Application number
DE69701905T
Other languages
English (en)
Other versions
DE69701905T2 (de
Inventor
Yutaka Yamanaka
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE69701905D1 publication Critical patent/DE69701905D1/de
Publication of DE69701905T2 publication Critical patent/DE69701905T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/13—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
    • G11B7/13—Optical detectors therefor
    • G11B7/133—Shape of individual detector elements
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • 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
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE69701905T 1996-02-15 1997-02-14 Photodetektor für optischen Kopf Expired - Lifetime DE69701905T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8027590A JPH09219036A (ja) 1996-02-15 1996-02-15 光ヘッド装置

Publications (2)

Publication Number Publication Date
DE69701905D1 true DE69701905D1 (de) 2000-06-15
DE69701905T2 DE69701905T2 (de) 2000-11-16

Family

ID=12225174

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69701905T Expired - Lifetime DE69701905T2 (de) 1996-02-15 1997-02-14 Photodetektor für optischen Kopf

Country Status (4)

Country Link
US (1) US5872759A (de)
EP (1) EP0790607B1 (de)
JP (1) JPH09219036A (de)
DE (1) DE69701905T2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100255243B1 (ko) * 1997-11-19 2000-05-01 윤종용 광기록매체들에 호환가능한 광픽업
US20050068864A1 (en) * 1999-07-08 2005-03-31 Samsung Electronics Co., Ltd. Method and apparatus for tracking error detection in optical disk driver
WO2001041271A1 (fr) * 1999-11-30 2001-06-07 Matsushita Electric Industrial Co., Ltd. Dispositif laser a semi-conducteurs, procede de production de ce dernier et dispositif a disque optique

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60138748A (ja) * 1983-12-27 1985-07-23 Toshiba Corp 光学式情報再生装置
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.
JPS6435730A (en) * 1987-07-31 1989-02-06 Sony Corp Focussing error detector
JPH01311428A (ja) * 1988-06-09 1989-12-15 Matsushita Electric Ind Co Ltd 光ヘッド装置及びこれを用いた光情報装置
DE3913229A1 (de) * 1988-09-19 1990-03-22 Pioneer Electronic Corp Wiedergabegeraet fuer optische informationen
JP2761791B2 (ja) * 1990-05-08 1998-06-04 株式会社コパル 光記録装置
JP2551302B2 (ja) * 1991-09-18 1996-11-06 日本電気株式会社 光学式記録再生装置とその製造方法
JP2559006B2 (ja) * 1993-01-13 1996-11-27 松下電器産業株式会社 光ヘッド
JP2532818B2 (ja) * 1993-02-01 1996-09-11 松下電器産業株式会社 対物レンズおよび光ヘッド装置
JP3309470B2 (ja) * 1993-03-10 2002-07-29 松下電器産業株式会社 光情報記録再生装置
US5511059A (en) * 1994-06-14 1996-04-23 Eastman Kodak Company Multi-element grating beam splitter with a reflection grating element for use in front facet substraction
JPH08248307A (ja) * 1995-03-10 1996-09-27 Sony Corp 対物レンズ、光ヘッド装置及び光ディスク再生装置
KR100200858B1 (ko) * 1995-10-04 1999-06-15 윤종용 광픽업장치
US5659533A (en) * 1996-07-23 1997-08-19 Sampo Corporation Method of using a single pick-up head to read and store data on discs of different thicknesses and structure of a pick-up head apparatus therefor

Also Published As

Publication number Publication date
DE69701905T2 (de) 2000-11-16
EP0790607B1 (de) 2000-05-10
US5872759A (en) 1999-02-16
JPH09219036A (ja) 1997-08-19
EP0790607A1 (de) 1997-08-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition