FR2722605B1 - Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement - Google Patents

Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement

Info

Publication number
FR2722605B1
FR2722605B1 FR9408736A FR9408736A FR2722605B1 FR 2722605 B1 FR2722605 B1 FR 2722605B1 FR 9408736 A FR9408736 A FR 9408736A FR 9408736 A FR9408736 A FR 9408736A FR 2722605 B1 FR2722605 B1 FR 2722605B1
Authority
FR
France
Prior art keywords
recording
reading information
optical method
recording medium
medium
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
FR9408736A
Other languages
English (en)
Other versions
FR2722605A1 (fr
Inventor
Carvennec Francois Le
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 CSF SA filed Critical Thomson CSF SA
Priority to FR9408736A priority Critical patent/FR2722605B1/fr
Priority to EP95904592A priority patent/EP0686298B1/fr
Priority to JP7517241A priority patent/JPH08509566A/ja
Priority to US08/507,232 priority patent/US5680386A/en
Priority to DE69424532T priority patent/DE69424532T2/de
Priority to PCT/FR1994/001517 priority patent/WO1995017747A1/fr
Publication of FR2722605A1 publication Critical patent/FR2722605A1/fr
Application granted granted Critical
Publication of FR2722605B1 publication Critical patent/FR2722605B1/fr
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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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
    • G11B7/12—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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
FR9408736A 1993-12-23 1994-07-13 Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement Expired - Fee Related FR2722605B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9408736A FR2722605B1 (fr) 1994-07-13 1994-07-13 Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement
EP95904592A EP0686298B1 (fr) 1993-12-23 1994-12-22 Procede et systeme optiques d'inscription/lecture d'information sur un support d'enregistrement
JP7517241A JPH08509566A (ja) 1993-12-23 1994-12-22 記録媒体の上で情報を書き込み／読み出す光システムおよびその方法
US08/507,232 US5680386A (en) 1993-12-23 1994-12-22 Optical method and system for writing/reading information on a recording medium
DE69424532T DE69424532T2 (de) 1993-12-23 1994-12-22 Verfahren und optisches system zur aufzeichnung/wiedergabe von information auf einem aufzeichnungsmedium
PCT/FR1994/001517 WO1995017747A1 (fr) 1993-12-23 1994-12-22 Procede et systeme optiques d'inscription/lecture d'information sur un support d'enregistrement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9408736A FR2722605B1 (fr) 1994-07-13 1994-07-13 Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement

Publications (2)

Publication Number Publication Date
FR2722605A1 FR2722605A1 (fr) 1996-01-19
FR2722605B1 true FR2722605B1 (fr) 1996-08-14

Family

ID=9465377

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9408736A Expired - Fee Related FR2722605B1 (fr) 1993-12-23 1994-07-13 Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement

Country Status (1)

Country Link
FR (1) FR2722605B1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54834A (en) * 1977-06-03 1979-01-06 Nippon Telegr & Teleph Corp <Ntt> Optical information processing system
JPS57152549A (en) * 1981-03-17 1982-09-20 Fujitsu Ltd Optical recorder
FR2521760A1 (fr) * 1982-02-12 1983-08-19 Thomson Csf Procede thermo-optique d'inscription d'information sur support et dispositif mettant en oeuvre ce procede
JPS5922246A (ja) * 1982-07-28 1984-02-04 Toshiba Corp 情報記録装置
NL8801327A (nl) * 1988-05-24 1989-12-18 Philips Nv Methode voor het optisch aftasten van een informatievlak en optische registratiedragers en aftastinrichtingen geschikt voor toepassing van de methode.
JPH0296937A (ja) * 1988-10-03 1990-04-09 Nippon Columbia Co Ltd 光情報記録装置
JPH02302932A (ja) * 1989-05-16 1990-12-14 Fuji Electric Co Ltd 光記録再生方式
US5172369A (en) * 1990-03-02 1992-12-15 Pioneer Electronic Corporation Optical pickup, optical information recording carrier and recording and reproducing apparatus thereof
JPH03273545A (ja) * 1990-03-23 1991-12-04 Matsushita Electric Ind Co Ltd 光磁気記録再生装置
JPH0668474A (ja) * 1992-08-19 1994-03-11 Sanyo Electric Co Ltd 光記録媒体およびその再生装置

Also Published As

Publication number Publication date
FR2722605A1 (fr) 1996-01-19

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Legal Events

Date Code Title Description
ST Notification of lapse