NL192804B - Optische kop voor het lezen van digitale data op een reflecterend registratiemedium. - Google Patents

Optische kop voor het lezen van digitale data op een reflecterend registratiemedium.

Info

Publication number
NL192804B
NL192804B NL8702237A NL8702237A NL192804B NL 192804 B NL192804 B NL 192804B NL 8702237 A NL8702237 A NL 8702237A NL 8702237 A NL8702237 A NL 8702237A NL 192804 B NL192804 B NL 192804B
Authority
NL
Netherlands
Prior art keywords
recording medium
digital data
optical head
reading digital
reflective recording
Prior art date
Application number
NL8702237A
Other languages
English (en)
Other versions
NL192804C (nl
NL8702237A (nl
Original Assignee
Nippon Telegraph & Telephone
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
Priority claimed from JP61218097A external-priority patent/JPS6374128A/ja
Priority claimed from JP62041509A external-priority patent/JP2614855B2/ja
Priority claimed from JP62059699A external-priority patent/JPS63239626A/ja
Priority claimed from JP62059016A external-priority patent/JPH0664755B2/ja
Priority claimed from JP14010487A external-priority patent/JPS63305580A/ja
Application filed by Nippon Telegraph & Telephone filed Critical Nippon Telegraph & Telephone
Publication of NL8702237A publication Critical patent/NL8702237A/nl
Publication of NL192804B publication Critical patent/NL192804B/nl
Application granted granted Critical
Publication of NL192804C publication Critical patent/NL192804C/nl

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
    • G11B7/125—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
    • G11B7/127—Lasers; Multiple laser arrays
    • 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
    • G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic recording
    • 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
    • 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
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • 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
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/14—External cavity lasers
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam 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
    • H01S5/0014—Measuring characteristics or properties thereof
    • H01S5/0028—Laser diodes used as detectors
    • 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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
    • H01S5/0262—Photo-diodes, e.g. transceiver devices, bidirectional devices
    • 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
    • H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
    • 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
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
    • H01S5/4031—Edge-emitting structures

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Head (AREA)
NL8702237A 1986-09-18 1987-09-18 Optische kop voor het lezen van digitale data op een reflecterend registratiemedium. NL192804C (nl)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP61218097A JPS6374128A (ja) 1986-09-18 1986-09-18 光ヘツド
JP21809786 1986-09-18
JP4150987 1987-02-26
JP62041509A JP2614855B2 (ja) 1987-02-26 1987-02-26 光ヘツド
JP62059699A JPS63239626A (ja) 1987-03-14 1987-03-14 信号検出方法
JP5969987 1987-03-14
JP5901687 1987-03-16
JP62059016A JPH0664755B2 (ja) 1987-03-16 1987-03-16 相変態形書き替え可能光記録媒体光ヘツド用半導体アレイレ−ザ
JP14010487A JPS63305580A (ja) 1987-06-05 1987-06-05 半導体レ−ザ
JP14010487 1987-06-05

Publications (3)

Publication Number Publication Date
NL8702237A NL8702237A (nl) 1988-04-18
NL192804B true NL192804B (nl) 1997-10-01
NL192804C NL192804C (nl) 1998-02-03

Family

ID=27522173

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8702237A NL192804C (nl) 1986-09-18 1987-09-18 Optische kop voor het lezen van digitale data op een reflecterend registratiemedium.

Country Status (2)

Country Link
US (1) US4860276A (nl)
NL (1) NL192804C (nl)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0588385B1 (en) * 1989-02-13 1997-10-15 Omron Corporation Recording/reproducing apparatus of optical card
JPH077509B2 (ja) * 1989-02-20 1995-01-30 オムロン株式会社 ２光源方式光学的記録再生装置
US5426674A (en) * 1990-02-06 1995-06-20 Nemirovsky; Paul Method and computer system for selecting and evaluating data routes and arranging a distributed data communication network
US5119039A (en) * 1990-12-31 1992-06-02 Gte Laboratories Incorporated Semiconductor optical amplifier with wideband electrical response
EP0539559A1 (en) * 1991-04-03 1993-05-05 Eastman Kodak Company HIGH DURABILITY MASK FOR DRY ETCHING OF GaAs
FR2690542B1 (fr) * 1992-04-22 1997-11-14 France Telecom Dispositif de lecture d'inscriptions sur un support, application a la lecture de disques compacts et de codes-barres.
EP0568753A1 (en) * 1992-05-07 1993-11-10 International Business Machines Corporation High-density optical data storage unit and method for writing and reading information
JPH0696468A (ja) * 1992-09-14 1994-04-08 Canon Inc 光記録再生装置及び半導体レーザアレイ
JPH087323A (ja) * 1994-06-17 1996-01-12 Hitachi Ltd 光ヘッドおよび光情報記録再生装置
JPH0818152A (ja) * 1994-06-30 1996-01-19 Sony Corp 光半導体装置及びその製造方法
US5809282A (en) * 1995-06-07 1998-09-15 Grc International, Inc. Automated network simulation and optimization system
US5625617A (en) * 1995-09-06 1997-04-29 Lucent Technologies Inc. Near-field optical apparatus with a laser having a non-uniform emission face
JP3761240B2 (ja) * 1996-02-28 2006-03-29 浜松ホトニクス株式会社 光検出装置
US6181673B1 (en) * 1996-07-30 2001-01-30 Read-Rite Corporation Slider design
US5887009A (en) * 1997-05-22 1999-03-23 Optical Biopsy Technologies, Inc. Confocal optical scanning system employing a fiber laser
US6445723B1 (en) 1998-05-18 2002-09-03 Jds Uniphase Corporation Laser source with submicron aperture
EP1033793B1 (en) * 1998-07-14 2004-09-29 Sharp Kabushiki Kaisha Semiconductor laser device
US7095767B1 (en) * 1999-08-30 2006-08-22 Research Investment Network, Inc. Near field optical apparatus
US7069569B2 (en) * 2000-02-01 2006-06-27 Research Investment Network, Inc. Near-field optical head system with integrated slider and laser
US6574257B1 (en) * 2000-02-01 2003-06-03 Siros Technologies, Inc. Near-field laser and detector apparatus and method
US6963530B1 (en) 2000-02-01 2005-11-08 Research Investment Network, Inc. Near-field optical head system with integrated slider and laser
US6937637B1 (en) 2000-02-01 2005-08-30 Research Investment Network, Inc. Semiconductor laser and associated drive circuit substrate
US6432346B1 (en) 2000-05-03 2002-08-13 Iomega Corporation Process of making magnetic recording disk
US6549506B1 (en) 2000-07-17 2003-04-15 Iomega Corporation Photo detector mounting in a head gimbal assembly used in an optical data storage device
US8441895B2 (en) * 2009-11-20 2013-05-14 Tdk Corporation Thermally-assisted magnetic recording head with light detector in element-integration surface
US8424191B2 (en) * 2009-12-28 2013-04-23 Tdk Corporation Method for manufacturing thermally-assisted magnetic recording head by semi-active alignment
US8149653B2 (en) * 2010-03-22 2012-04-03 Tdk Corporation Light source unit for thermally-assisted magnetic recording capable of monitoring of light output
US8274867B2 (en) 2010-03-31 2012-09-25 Tdk Corporation Method for aligning the light source unit and the slider of thermally-assisted magnetic recording head

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456914A (en) * 1978-03-27 1984-06-26 Discovision Associates Method and apparatus for storing information on a storage medium
JPS5927974B2 (ja) * 1980-03-31 1984-07-10 工業技術院長 光情報処理装置
JPS57133531A (en) * 1981-02-12 1982-08-18 Agency Of Ind Science & Technol Optical information processor
US4451915A (en) * 1982-04-15 1984-05-29 Burroughs Corporation Optical storage system employing a multi-layer optical medium
US4538257A (en) * 1982-12-23 1985-08-27 Xerox Corporation Adaptively stabilized recording for direct read after write optical memories
JPS61160989A (ja) * 1985-01-09 1986-07-21 Nec Corp 半導体レ−ザアレイ装置とその製造方法

Also Published As

Publication number Publication date
NL192804C (nl) 1998-02-03
US4860276A (en) 1989-08-22
NL8702237A (nl) 1988-04-18

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A1A A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
V4 Lapsed because of reaching the maximum lifetime of a patent

Effective date: 20070918