FR745580A - - Google Patents

Info

Publication number
FR745580A
FR745580A FR745580DA FR745580A FR 745580 A FR745580 A FR 745580A FR 745580D A FR745580D A FR 745580DA FR 745580 A FR745580 A FR 745580A
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
Other languages
French (fr)
Publication date
Application granted granted Critical
Publication of FR745580A publication Critical patent/FR745580A/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
FR745580D Expired FR745580A (en)

Publications (1)

Publication Number Publication Date
FR745580A true FR745580A (en) 1933-05-12

Family

ID=1549537

Family Applications (1)

Application Number Title Priority Date Filing Date
FR745580D Expired FR745580A (en)

Country Status (1)

Country Link
FR (1) FR745580A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742170C (en) * 1935-11-19 1943-11-24 Zeiss Ikon Ag Circuit for the coupling of photocells working in push-pull mode to an optical sound reproduction amplifier
DE753763C (en) * 1937-04-09 1954-04-29 Universum Film A G Method for scanning optical sound recordings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742170C (en) * 1935-11-19 1943-11-24 Zeiss Ikon Ag Circuit for the coupling of photocells working in push-pull mode to an optical sound reproduction amplifier
DE753763C (en) * 1937-04-09 1954-04-29 Universum Film A G Method for scanning optical sound recordings

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