FR2069448A5 - - Google Patents

Info

Publication number
FR2069448A5
FR2069448A5 FR7040862A FR7040862A FR2069448A5 FR 2069448 A5 FR2069448 A5 FR 2069448A5 FR 7040862 A FR7040862 A FR 7040862A FR 7040862 A FR7040862 A FR 7040862A FR 2069448 A5 FR2069448 A5 FR 2069448A5
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
FR7040862A
Other languages
French (fr)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19691958858 external-priority patent/DE1958858C3/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of FR2069448A5 publication Critical patent/FR2069448A5/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
    • G11B7/08—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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
FR7040862A 1969-11-15 1970-11-13 Expired FR2069448A5 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691958858 DE1958858C3 (de) 1969-11-15 Einrichtung zur Lichtabtastung eines Trägers mit Rillen

Publications (1)

Publication Number Publication Date
FR2069448A5 true FR2069448A5 (ja) 1971-09-03

Family

ID=5751873

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7040862A Expired FR2069448A5 (ja) 1969-11-15 1970-11-13

Country Status (4)

Country Link
US (1) US3764759A (ja)
JP (1) JPS4917046B1 (ja)
FR (1) FR2069448A5 (ja)
GB (1) GB1285108A (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010317A (en) * 1972-03-29 1977-03-01 U.S. Philips Corporation Apparatus for reading a record carrier in which information, for example video and/or audio information, is recorded in at least one track
FR2197495A5 (ja) * 1972-08-25 1974-03-22 Thomson Csf
NL161284C (nl) * 1972-09-02 1980-01-15 Philips Nv Weergavestelsel voor een optisch uitleesbare informatie- structuur, alsmede registratiedrager voor gebruik daarin.
US3919562A (en) * 1974-05-20 1975-11-11 Zenith Radio Corp Slit detector for optical detector system
JPS57125245U (ja) * 1981-01-30 1982-08-04
US4534021A (en) * 1981-12-10 1985-08-06 Discovision Associates Angularly multiplexed optical recording medium
US5161134A (en) * 1989-06-29 1992-11-03 Digital Equipment Corporation Method for increasing linear bit density in magneto-optical storage media

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB304848A (en) * 1927-10-31 1929-01-31 Brenchley Ernest George Mittel Improvements in or relating to sound recording
US1917003A (en) * 1929-01-21 1933-07-04 Columbia Phono Graph Company I Reproduction of sound records
US1956626A (en) * 1931-03-14 1934-05-01 Percy A Robbins Translucent sound record
US2497142A (en) * 1941-12-18 1950-02-14 Shepherd Judson O'd Sound recorder and reproducer

Also Published As

Publication number Publication date
US3764759A (en) 1973-10-09
GB1285108A (en) 1972-08-09
JPS4917046B1 (ja) 1974-04-26
DE1958858B2 (de) 1976-03-04
DE1958858A1 (de) 1971-06-03

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse