FR2321164B1 - - Google Patents

Info

Publication number
FR2321164B1
FR2321164B1 FR7525163A FR7525163A FR2321164B1 FR 2321164 B1 FR2321164 B1 FR 2321164B1 FR 7525163 A FR7525163 A FR 7525163A FR 7525163 A FR7525163 A FR 7525163A FR 2321164 B1 FR2321164 B1 FR 2321164B1
Authority
FR
France
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
Application number
FR7525163A
Other languages
French (fr)
Other versions
FR2321164A1 (en
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 FR7525163A priority Critical patent/FR2321164A1/en
Publication of FR2321164A1 publication Critical patent/FR2321164A1/en
Application granted granted Critical
Publication of FR2321164B1 publication Critical patent/FR2321164B1/fr
Granted 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
    • 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
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
FR7525163A 1975-08-13 1975-08-13 Video signal recording system - reads out signals from constant pitch spiral disc track using beam mechanically controlled by guide track Granted FR2321164A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7525163A FR2321164A1 (en) 1975-08-13 1975-08-13 Video signal recording system - reads out signals from constant pitch spiral disc track using beam mechanically controlled by guide track

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7525163A FR2321164A1 (en) 1975-08-13 1975-08-13 Video signal recording system - reads out signals from constant pitch spiral disc track using beam mechanically controlled by guide track

Publications (2)

Publication Number Publication Date
FR2321164A1 FR2321164A1 (en) 1977-03-11
FR2321164B1 true FR2321164B1 (en) 1977-12-16

Family

ID=9159040

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525163A Granted FR2321164A1 (en) 1975-08-13 1975-08-13 Video signal recording system - reads out signals from constant pitch spiral disc track using beam mechanically controlled by guide track

Country Status (1)

Country Link
FR (1) FR2321164A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56145535A (en) * 1980-04-15 1981-11-12 Matsushita Electric Ind Co Ltd Disc for optical recording
US4428075A (en) * 1981-12-21 1984-01-24 Burroughs Corporation Methods of preformatting an optical disk
US4428069A (en) * 1981-12-21 1984-01-24 Burroughs Corporation Apparatus for preformatting an optical disk
EP0100995A3 (en) * 1982-08-10 1985-10-16 Kabushiki Kaisha Toshiba Optical disk
US4480302A (en) * 1982-09-29 1984-10-30 Storage Technology Corporation Optical recording media
US4985881A (en) * 1983-12-23 1991-01-15 Hitachi, Ltd. Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter
US4716560A (en) * 1984-05-22 1987-12-29 Victor Company Of Japan, Ltd. Recording disc and method for fabricating same
US4949331A (en) * 1985-06-19 1990-08-14 Hitachi, Ltd. Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus
JPH0746429B2 (en) * 1985-06-21 1995-05-17 オリンパス光学工業株式会社 Optical recording / reproducing device
US5144552A (en) * 1986-07-25 1992-09-01 Ricoh Company, Ltd. Optical information storage medium having grooves and pits with specific depths, respectively
US5432047A (en) * 1992-06-12 1995-07-11 International Business Machines Corporation Patterning process for bipolar optical storage medium
KR100433238B1 (en) * 1998-04-04 2004-09-16 엘지전자 주식회사 Optical Disc and Method and Apparatus of Fabricating Master Disc for the Same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967882A (en) * 1929-08-01 1934-07-24 Jr John Hays Hammond Photo-electric system for recording and reproducing sound
DE1927408C3 (en) * 1969-01-23 1974-02-28 Ted Bildplatten Ag Aeg-Telefunken-Teldec, Zug (Schweiz) Device for reproducing stored signals
US3800099A (en) * 1971-03-31 1974-03-26 Ted Bildplatten Storing and reproducing information and carrier therefor with zones of different deformation characteristics
NL7312139A (en) * 1972-09-08 1974-03-12
IT1004391B (en) * 1973-03-27 1976-07-10 Ted Bildplatten PROCEDURE AND DEVICE FOR MANUFACTURING A GUIDE IN THE SOL CO FOR THE RECORDING OF INFORMATION OF A SPIRAL ON A DISCOID-SHAPED SIGNAL SUPPORT

Also Published As

Publication number Publication date
FR2321164A1 (en) 1977-03-11

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Legal Events

Date Code Title Description
ST Notification of lapse