DE69024329T2 - Optischer Kopf - Google Patents

Optischer Kopf

Info

Publication number
DE69024329T2
DE69024329T2 DE69024329T DE69024329T DE69024329T2 DE 69024329 T2 DE69024329 T2 DE 69024329T2 DE 69024329 T DE69024329 T DE 69024329T DE 69024329 T DE69024329 T DE 69024329T DE 69024329 T2 DE69024329 T2 DE 69024329T2
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 - Lifetime
Application number
DE69024329T
Other languages
English (en)
Other versions
DE69024329D1 (de
Inventor
Hiroshi Katayama
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
Publication of DE69024329D1 publication Critical patent/DE69024329D1/de
Application granted granted Critical
Publication of DE69024329T2 publication Critical patent/DE69024329T2/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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE69024329T 1989-11-02 1990-10-26 Optischer Kopf Expired - Lifetime DE69024329T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1288323A JP2934264B2 (ja) 1989-11-02 1989-11-02 光ピックアップ

Publications (2)

Publication Number Publication Date
DE69024329D1 DE69024329D1 (de) 1996-02-01
DE69024329T2 true DE69024329T2 (de) 1996-08-22

Family

ID=17728695

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69024329T Expired - Lifetime DE69024329T2 (de) 1989-11-02 1990-10-26 Optischer Kopf

Country Status (4)

Country Link
US (1) US5515350A (de)
EP (1) EP0426035B1 (de)
JP (1) JP2934264B2 (de)
DE (1) DE69024329T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3765348B2 (ja) * 1997-05-29 2006-04-12 ミツミ電機株式会社 レーザ光投光装置
JP3382846B2 (ja) * 1998-05-11 2003-03-04 日本電気株式会社 光ヘッド及び光ヘッドに於ける光源出力のモニター方法
US7072590B2 (en) 2001-03-26 2006-07-04 Avago Technologies General Ip Pte. Ltd. Fiber optic receiver with an adjustable bandwidth post-amplifier
DE10160378A1 (de) 2001-12-10 2003-06-18 Thomson Brandt Gmbh Wiedergabe- oder Aufzeichnungsgerät für unterschiedliche optische Aufzeichnungsträger
KR100594239B1 (ko) * 2004-01-28 2006-06-30 삼성전자주식회사 디지털 전위차계를 이용한 포토 다이오드의 감도 조정장치 및 방법
JP2008176882A (ja) * 2007-01-19 2008-07-31 Sharp Corp フロントモニタ装置ならびにそれを備える光ピックアップ装置および情報記録再生装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584687A (en) * 1983-12-12 1986-04-22 Optical Storage International-U.S. Calibrated feedback for laser diodes
JPS60187074A (ja) * 1984-03-07 1985-09-24 Toshiba Corp レ−ザダイオ−ドの自動光量調整回路
US4675749A (en) * 1984-03-16 1987-06-23 Pioneer Electronic Corporation Disc player system with digital information demodulation operation
JPS60247836A (ja) * 1984-05-22 1985-12-07 Nippon Gakki Seizo Kk 光学式情報再生装置
JPH0680554B2 (ja) * 1985-02-08 1994-10-12 オリンパス光学工業株式会社 ２値化信号発生回路
FR2584223B1 (fr) * 1985-06-28 1994-06-17 Thomson Alcatel Gigadisc Memoire optique a suivi de piste echantillonne pour support d'information pregrave.
US4685097A (en) * 1985-07-25 1987-08-04 Laser Magnetic Storage International Company Power control system for a semiconductor laser
JP2615553B2 (ja) * 1985-11-14 1997-05-28 富士通株式会社 レーザ制御装置
JPS62150732U (de) * 1986-03-17 1987-09-24
JPH01112533A (ja) * 1987-10-23 1989-05-01 Mitsubishi Electric Corp 光ディスク装置
JPH01144243A (ja) * 1987-11-30 1989-06-06 Toshiba Corp 情報記録装置
JP2771821B2 (ja) * 1988-08-31 1998-07-02 オリンパス光学工業株式会社 発光体の光量制御装置
GB2229268A (en) * 1989-02-27 1990-09-19 Philips Nv Radiation emitting arrangement monitoring and controlling system
JPH02246027A (ja) * 1989-03-17 1990-10-01 Matsushita Electric Ind Co Ltd 半導体レーザ駆動回路

Also Published As

Publication number Publication date
DE69024329D1 (de) 1996-02-01
US5515350A (en) 1996-05-07
EP0426035A2 (de) 1991-05-08
EP0426035A3 (en) 1991-10-09
JPH03147534A (ja) 1991-06-24
EP0426035B1 (de) 1995-12-20
JP2934264B2 (ja) 1999-08-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

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