FR2217760A1 - - Google Patents

Info

Publication number
FR2217760A1
FR2217760A1 FR7304703A FR7304703A FR2217760A1 FR 2217760 A1 FR2217760 A1 FR 2217760A1 FR 7304703 A FR7304703 A FR 7304703A FR 7304703 A FR7304703 A FR 7304703A FR 2217760 A1 FR2217760 A1 FR 2217760A1
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.)
Granted
Application number
FR7304703A
Other versions
FR2217760B1 (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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt 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-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7304703A priority Critical patent/FR2217760B1/fr
Priority to IT2021474A priority patent/IT1007250B/it
Priority to DE19742406175 priority patent/DE2406175A1/de
Priority to JP1590174A priority patent/JPS5047641A/ja
Publication of FR2217760A1 publication Critical patent/FR2217760A1/fr
Application granted granted Critical
Publication of FR2217760B1 publication Critical patent/FR2217760B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • 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
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • 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
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/89—Television signal recording using holographic recording
    • H04N5/90—Television signal recording using holographic recording on discs or drums

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Holo Graphy (AREA)
FR7304703A 1973-02-09 1973-02-09 Expired FR2217760B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7304703A FR2217760B1 (fr) 1973-02-09 1973-02-09
IT2021474A IT1007250B (it) 1973-02-09 1974-02-06 Procedimento olografico di diffu sione di informazione utilizzante per veicolare l informazione stes sa un supporto materiale a forma di disco o di nastro
DE19742406175 DE2406175A1 (de) 1973-02-09 1974-02-08 Verfahren zum verbreiten von information
JP1590174A JPS5047641A (fr) 1973-02-09 1974-02-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7304703A FR2217760B1 (fr) 1973-02-09 1973-02-09

Publications (2)

Publication Number Publication Date
FR2217760A1 true FR2217760A1 (fr) 1974-09-06
FR2217760B1 FR2217760B1 (fr) 1976-11-05

Family

ID=9114621

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7304703A Expired FR2217760B1 (fr) 1973-02-09 1973-02-09

Country Status (4)

Country Link
JP (1) JPS5047641A (fr)
DE (1) DE2406175A1 (fr)
FR (1) FR2217760B1 (fr)
IT (1) IT1007250B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534166A (en) * 1967-08-04 1970-10-13 Zenith Radio Corp Television picture recording and replay system
FR2075843A1 (fr) * 1969-12-19 1971-10-15 Thomson Csf
FR2114518A5 (fr) * 1970-11-13 1972-06-30 Siemens Ag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534166A (en) * 1967-08-04 1970-10-13 Zenith Radio Corp Television picture recording and replay system
FR2075843A1 (fr) * 1969-12-19 1971-10-15 Thomson Csf
FR2114518A5 (fr) * 1970-11-13 1972-06-30 Siemens Ag

Also Published As

Publication number Publication date
FR2217760B1 (fr) 1976-11-05
IT1007250B (it) 1976-10-30
JPS5047641A (fr) 1975-04-28
DE2406175A1 (de) 1974-08-15

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Legal Events

Date Code Title Description
ST Notification of lapse