IT1057444B - Dispositivo di registrazione otti ca di informazione - Google Patents

Dispositivo di registrazione otti ca di informazione

Info

Publication number
IT1057444B
IT1057444B IT48642/76A IT4864276A IT1057444B IT 1057444 B IT1057444 B IT 1057444B IT 48642/76 A IT48642/76 A IT 48642/76A IT 4864276 A IT4864276 A IT 4864276A IT 1057444 B IT1057444 B IT 1057444B
Authority
IT
Italy
Prior art keywords
otti
information
registration device
registration
Prior art date
Application number
IT48642/76A
Other languages
English (en)
Original Assignee
Thomson Brandt
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 Thomson Brandt filed Critical Thomson Brandt
Application granted granted Critical
Publication of IT1057444B publication Critical patent/IT1057444B/it

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
    • G11B7/128—Modulators
    • 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
    • G11B7/0908—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 focusing only
    • 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
    • G11B7/0908—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 focusing only
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • 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
IT48642/76A 1975-03-21 1976-03-18 Dispositivo di registrazione otti ca di informazione IT1057444B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7508945A FR2304981A1 (fr) 1975-03-21 1975-03-21 Dispositif d'enregistrement optique d'informations

Publications (1)

Publication Number Publication Date
IT1057444B true IT1057444B (it) 1982-03-10

Family

ID=9152918

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48642/76A IT1057444B (it) 1975-03-21 1976-03-18 Dispositivo di registrazione otti ca di informazione

Country Status (5)

Country Link
US (1) US4051329A (it)
JP (1) JPS51135549A (it)
DE (1) DE2611734A1 (it)
FR (1) FR2304981A1 (it)
IT (1) IT1057444B (it)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5263793A (en) * 1975-11-21 1977-05-26 Pioneer Electronic Corp Optical signal reader
JPS5827891B2 (ja) * 1976-09-14 1983-06-13 日本ビクター株式会社 レ−ザ光束の安定化装置
CA1106061A (en) * 1977-02-09 1981-07-28 Yoshiyo Wada Rotary recording medium with intermediate pits
NL173104C (nl) * 1977-02-09 1983-12-01 Victor Company Of Japan Informatiesignaalregistratiemedium van roterende soort en inrichting voor het registreren van informatiesignalen daarop.
US4410968A (en) * 1977-03-24 1983-10-18 Thomas Lee Siwecki Method and apparatus for recording on a disk supported deformable metallic film
US4145758A (en) * 1977-10-25 1979-03-20 Drexler Technology Corporation Error checking method and apparatus for digital data in optical recording systems
NL187413C (nl) * 1978-03-16 1991-09-16 Philips Nv Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager.
JPS54133305A (en) * 1978-04-07 1979-10-17 Hitachi Ltd Information recorder
JPS54143109A (en) * 1978-04-28 1979-11-08 Hitachi Ltd Optical information device
JPS5753830A (en) * 1980-09-12 1982-03-31 Sony Corp Tracking servo device for optical information signal reproducer
US4488279A (en) * 1980-10-20 1984-12-11 Discovision Associates Video recorder-playback machine
US4467467A (en) * 1980-10-20 1984-08-21 Discovision Associates Video recorder-playback machine
US4419750A (en) * 1981-07-13 1983-12-06 Eastman Kodak Company Constant track width optical disk recording
JPS5832236A (ja) * 1981-08-18 1983-02-25 Matsushita Electric Ind Co Ltd 光学的記録再生装置
JPS5862630A (ja) * 1981-10-08 1983-04-14 Sony Corp 光変調装置
JPS5894143A (ja) * 1981-12-01 1983-06-04 Matsushita Electric Ind Co Ltd 光学的記録再生装置
EP0083452B1 (en) * 1982-01-06 1987-04-01 Hitachi, Ltd. Control circuit for controlling light source in optical disc device
US4488277A (en) * 1982-02-10 1984-12-11 North American Philips Corporation Control system for an optical data recording apparatus
US4642803A (en) * 1982-08-09 1987-02-10 Drexler Technology Corporation Optical data retrieval system for multi-characteristic reflective data storage media
US4562567A (en) * 1982-11-12 1985-12-31 North American Philips Corporation Apparatus for controlling the write beam in an optical data recording system
JPS6020326A (ja) * 1983-07-14 1985-02-01 Olympus Optical Co Ltd 光学的記録装置
US4629879A (en) * 1984-06-11 1986-12-16 Eastman Kodak Company Light beam intensity controlling apparatus
DE3546645C2 (it) * 1984-11-20 1991-10-17 Olympus Optical Co., Ltd., Tokio/Tokyo, Jp
US4899327A (en) * 1985-02-04 1990-02-06 International Business Machines Corporation Focus servo loop correction
JPH06101127B2 (ja) * 1985-03-13 1994-12-12 シャープ株式会社 光学ヘツド
JPH0746435B2 (ja) * 1985-03-14 1995-05-17 オリンパス光学工業株式会社 光学的情報記録再生装置における光ピックアップの異常判別装置
JPS61250849A (ja) * 1985-04-30 1986-11-07 Olympus Optical Co Ltd 光学的情報記録再生装置
US4937799A (en) * 1985-12-13 1990-06-26 Canon Kabushiki Kaisha Method and apparatus for setting light quantity most suitable for reproducing information from an optical recording medium
US4718054A (en) * 1986-05-28 1988-01-05 Laser Magnetic Storage International Company Servo error write blanking circuit for an optical recording disk
JPH0827950B2 (ja) * 1986-10-20 1996-03-21 オリンパス光学工業株式会社 光学的情報記録再生装置のレ−ザコントロ−ル回路
US4998233A (en) * 1988-02-12 1991-03-05 International Business Machines Corporation Acquiring focus in optical systems using a focus error signal and a laser drive signal
US4908815A (en) * 1988-02-22 1990-03-13 Gregg David P Optical recording system utilizing proportional real-time feedback control of recording beam intensity
JPH0249225A (ja) * 1988-05-27 1990-02-19 Canon Inc 光学的情報記録再生装置
NL8901588A (nl) * 1989-06-23 1991-01-16 Philips Nv Inrichting voor het optekenen van informatie op een registratiedrager met een stralingsgevoelige laag.
JPH0721868B2 (ja) * 1989-08-04 1995-03-08 キヤノン株式会社 光情報処理装置
JPH0594635A (ja) * 1991-06-28 1993-04-16 Toshiba Corp デイスク装置
JPH0595149A (ja) * 1991-06-28 1993-04-16 Toshiba Corp レーザ制御回路
JP3519102B2 (ja) * 1993-06-08 2004-04-12 パイオニア株式会社 光ディスク記録情報再生装置
JPH10173859A (ja) * 1996-12-09 1998-06-26 Canon Inc アナログ信号処理回路
JP2910725B2 (ja) * 1997-04-14 1999-06-23 日本電気株式会社 光ディスク記録システム用記録不良判定装置
JP2006155698A (ja) * 2004-11-26 2006-06-15 Hitachi Ltd 光記録再生装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB306438A (en) * 1927-10-20 1929-02-20 Stuart Keith Wilson Improvements in or connected with recording sound
GB498394A (en) * 1937-07-06 1939-01-06 Electrical Res Prod Inc Improvements in or relating to film sound records
US2297450A (en) * 1939-03-18 1942-09-29 Becker Carlheinz Controlling the exposure of photographic sound records
US2274530A (en) * 1940-08-24 1942-02-24 Rca Corp Automatic light intensity control for sound apparatus
US2343674A (en) * 1942-05-29 1944-03-07 Rca Corp Sound recording
US2360012A (en) * 1942-12-30 1944-10-10 Rca Corp Lamp modulated recording method and system
US3654624A (en) * 1969-03-17 1972-04-04 Precision Instr Co Laser recording system using drum mounted record strips
US3787888A (en) * 1969-12-30 1974-01-22 Honeywell Inc Recording apparatus with beam intensity control means
US3787887A (en) * 1971-04-29 1974-01-22 Rca Corp Optical recorder with intensity control

Also Published As

Publication number Publication date
US4051329A (en) 1977-09-27
FR2304981A1 (fr) 1976-10-15
DE2611734A1 (de) 1976-10-07
JPS51135549A (en) 1976-11-24
FR2304981B1 (it) 1979-03-30

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