DE69802232D1 - Laserstrahlemittierende Vorrichtung und mit dieser Vorrichtung versehener optischer Abtastkopf - Google Patents

Laserstrahlemittierende Vorrichtung und mit dieser Vorrichtung versehener optischer Abtastkopf

Info

Publication number
DE69802232D1
DE69802232D1 DE69802232T DE69802232T DE69802232D1 DE 69802232 D1 DE69802232 D1 DE 69802232D1 DE 69802232 T DE69802232 T DE 69802232T DE 69802232 T DE69802232 T DE 69802232T DE 69802232 D1 DE69802232 D1 DE 69802232D1
Authority
DE
Germany
Prior art keywords
laser beam
optical scanning
scanning head
head provided
beam emitting
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
DE69802232T
Other languages
English (en)
Other versions
DE69802232T2 (de
Inventor
Osamu Masakado
Kenji Kan
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.)
Mitsumi Electric Co Ltd
Original Assignee
Mitsumi Electric Co Ltd
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 Mitsumi Electric Co Ltd filed Critical Mitsumi Electric Co Ltd
Application granted granted Critical
Publication of DE69802232D1 publication Critical patent/DE69802232D1/de
Publication of DE69802232T2 publication Critical patent/DE69802232T2/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
    • G11B7/13—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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE69802232T 1997-05-29 1998-05-29 Laserstrahlemittierende Vorrichtung und mit dieser Vorrichtung versehener optischer Abtastkopf Expired - Fee Related DE69802232T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15432397A JP3765348B2 (ja) 1997-05-29 1997-05-29 レーザ光投光装置

Publications (2)

Publication Number Publication Date
DE69802232D1 true DE69802232D1 (de) 2001-12-06
DE69802232T2 DE69802232T2 (de) 2002-06-27

Family

ID=15581636

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69802232T Expired - Fee Related DE69802232T2 (de) 1997-05-29 1998-05-29 Laserstrahlemittierende Vorrichtung und mit dieser Vorrichtung versehener optischer Abtastkopf

Country Status (5)

Country Link
US (1) US6134210A (de)
EP (1) EP0881633B1 (de)
JP (1) JP3765348B2 (de)
DE (1) DE69802232T2 (de)
HK (1) HK1017477A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP1329998A1 (de) * 2002-01-21 2003-07-23 Agilent Technologies, Inc. (a Delaware corporation) Arrangement für Überwachung der Emissionswellenlänge einer Laserquelle
JP4473130B2 (ja) * 2002-10-17 2010-06-02 パナソニック株式会社 光ディスク装置
EP1564729B1 (de) * 2004-02-17 2007-06-20 Matsushita Electric Industrial Co., Ltd. Optisches Plattenlaufwerk
EP1770694A3 (de) * 2005-09-01 2008-10-15 Kabushiki Kaisha Toshiba Fotodetektorschaltung, Verfahren zur Herleitung eines Signals zur Laserlichtemissionsmengensteuerung, optische Lesekopfvorrichtung und optisches Plattengerät
JPWO2007105704A1 (ja) * 2006-03-14 2009-07-30 パナソニック株式会社 光ディスク装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721850A (en) * 1985-03-06 1988-01-26 Olympus Optical Co., Ltd. Optical pickup device having a detector for detecting the light emitting intensity variation of a semiconductor light emitting element
JP2934264B2 (ja) * 1989-11-02 1999-08-16 シャープ株式会社 光ピックアップ
JPH03276432A (ja) * 1990-03-26 1991-12-06 Matsushita Electric Ind Co Ltd 光ディスク装置
JPH0581695A (ja) * 1991-09-24 1993-04-02 Ricoh Co Ltd 光デイスク装置の発光パワー検出回路
JP3239962B2 (ja) * 1992-09-10 2001-12-17 キヤノン株式会社 光学的情報記録再生装置
JPH06309685A (ja) * 1993-04-26 1994-11-04 Nippon Conlux Co Ltd 光学式情報記録再生装置のレーザ出力制御装置
US5563870A (en) * 1995-02-14 1996-10-08 Eastman Kodak Company Optical write/read head with laser power control

Also Published As

Publication number Publication date
DE69802232T2 (de) 2002-06-27
EP0881633B1 (de) 2001-10-31
JPH10334502A (ja) 1998-12-18
JP3765348B2 (ja) 2006-04-12
EP0881633A3 (de) 1998-12-09
EP0881633A2 (de) 1998-12-02
HK1017477A1 (en) 1999-11-19
US6134210A (en) 2000-10-17

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: MITSUMI ELECTRIC CO., LTD., TAMA, TOKIO/TOKYO, JP

8339 Ceased/non-payment of the annual fee