FR666951A - Perfectionnement à l'enregistrement optique des sons - Google Patents

Perfectionnement à l'enregistrement optique des sons

Info

Publication number
FR666951A
FR666951A FR666951DA FR666951A FR 666951 A FR666951 A FR 666951A FR 666951D A FR666951D A FR 666951DA FR 666951 A FR666951 A FR 666951A
Authority
FR
France
Prior art keywords
improvement
sound recording
optical sound
optical
recording
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
Application number
Other languages
English (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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR666951A publication Critical patent/FR666951A/fr
Expired 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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cleaning In Electrography (AREA)
FR666951D 1928-03-19 1929-01-04 Perfectionnement à l'enregistrement optique des sons Expired FR666951A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2002620X 1928-03-19

Publications (1)

Publication Number Publication Date
FR666951A true FR666951A (fr) 1929-10-08

Family

ID=10895756

Family Applications (1)

Application Number Title Priority Date Filing Date
FR666951D Expired FR666951A (fr) 1928-03-19 1929-01-04 Perfectionnement à l'enregistrement optique des sons

Country Status (2)

Country Link
US (1) US2002620A (fr)
FR (1) FR666951A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8002039A (nl) * 1980-04-08 1981-11-02 Philips Nv Optisch uitleesbare informatieschijf.

Also Published As

Publication number Publication date
US2002620A (en) 1935-05-28

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