FR2714511B1 - Optical method and system for recording / reading information on a recording medium. - Google Patents

Optical method and system for recording / reading information on a recording medium.

Info

Publication number
FR2714511B1
FR2714511B1 FR9315550A FR9315550A FR2714511B1 FR 2714511 B1 FR2714511 B1 FR 2714511B1 FR 9315550 A FR9315550 A FR 9315550A FR 9315550 A FR9315550 A FR 9315550A FR 2714511 B1 FR2714511 B1 FR 2714511B1
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
FR9315550A
Other languages
French (fr)
Other versions
FR2714511A1 (en
Inventor
Le Carvennec Francois
Huignard Jean-Pierre
Puech Claude
Loiseaux Brigitte
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 FR9315550A priority Critical patent/FR2714511B1/en
Priority to PCT/FR1994/001517 priority patent/WO1995017747A1/en
Priority to EP95904592A priority patent/EP0686298B1/en
Priority to US08/507,232 priority patent/US5680386A/en
Priority to JP7517241A priority patent/JPH08509566A/en
Priority to DE69424532T priority patent/DE69424532T2/en
Publication of FR2714511A1 publication Critical patent/FR2714511A1/en
Application granted granted Critical
Publication of FR2714511B1 publication Critical patent/FR2714511B1/en
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
FR9315550A 1993-12-23 1993-12-23 Optical method and system for recording / reading information on a recording medium. Expired - Fee Related FR2714511B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9315550A FR2714511B1 (en) 1993-12-23 1993-12-23 Optical method and system for recording / reading information on a recording medium.
PCT/FR1994/001517 WO1995017747A1 (en) 1993-12-23 1994-12-22 Optical method and system for reading/writing data on a recording medium
EP95904592A EP0686298B1 (en) 1993-12-23 1994-12-22 Optical method and system for reading/writing data on a recording medium
US08/507,232 US5680386A (en) 1993-12-23 1994-12-22 Optical method and system for writing/reading information on a recording medium
JP7517241A JPH08509566A (en) 1993-12-23 1994-12-22 Optical system and method for writing / reading information on / from a recording medium
DE69424532T DE69424532T2 (en) 1993-12-23 1994-12-22 METHOD AND OPTICAL SYSTEM FOR RECORDING / PLAYING BACK INFORMATION ON A RECORDING MEDIUM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9315550A FR2714511B1 (en) 1993-12-23 1993-12-23 Optical method and system for recording / reading information on a recording medium.

Publications (2)

Publication Number Publication Date
FR2714511A1 FR2714511A1 (en) 1995-06-30
FR2714511B1 true FR2714511B1 (en) 1996-01-26

Family

ID=9454312

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9315550A Expired - Fee Related FR2714511B1 (en) 1993-12-23 1993-12-23 Optical method and system for recording / reading information on a recording medium.

Country Status (1)

Country Link
FR (1) FR2714511B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187933A (en) * 1984-03-07 1985-09-25 Toshiba Corp Optical recording and reproducing device
JPS62162252A (en) * 1986-01-09 1987-07-18 Canon Inc Optical recording and reading method
NL8801327A (en) * 1988-05-24 1989-12-18 Philips Nv METHOD OF OPTICAL SCANNING OF AN INFORMATION SHEET AND OPTICAL RECORD CARRIERS AND SCANNING DEVICES SUITABLE FOR APPLICATION OF THE METHOD.
JPH02302932A (en) * 1989-05-16 1990-12-14 Fuji Electric Co Ltd Optical recording and reproducing system
JPH03273545A (en) * 1990-03-23 1991-12-04 Matsushita Electric Ind Co Ltd Magneto-optical recording and reproducing device

Also Published As

Publication number Publication date
FR2714511A1 (en) 1995-06-30

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Legal Events

Date Code Title Description
ST Notification of lapse