FR2368780A1 - Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support - Google Patents

Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support

Info

Publication number
FR2368780A1
FR2368780A1 FR7631866A FR7631866A FR2368780A1 FR 2368780 A1 FR2368780 A1 FR 2368780A1 FR 7631866 A FR7631866 A FR 7631866A FR 7631866 A FR7631866 A FR 7631866A FR 2368780 A1 FR2368780 A1 FR 2368780A1
Authority
FR
France
Prior art keywords
track
photosensitive
micro
coherent light
video 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.)
Granted
Application number
FR7631866A
Other languages
English (en)
Other versions
FR2368780B1 (fr
Inventor
Claude Bricot
Jean-Claude Lehureau
Gerard Robin
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 FR7631866A priority Critical patent/FR2368780A1/fr
Publication of FR2368780A1 publication Critical patent/FR2368780A1/fr
Application granted granted Critical
Publication of FR2368780B1 publication Critical patent/FR2368780B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor
    • 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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

L'invention se rapporte à un procédé de reproduction de supports d'information ne nécessitant aucun contact entre le support à reproduire et le support mémoire. Elle a pour objet un procedé de reproduction consistant à éclairer le support d'information, sur lequel l'information est enregistrée sous forme de microéléments diffractants, par une onde plane, un support mémoire photosensible placé parallèlement au support d'information étant impressionné par une onde plane transmise sans déviation par le support d'information et par les ondes diffractées par les microeléments enregistrés. L'invention a également pour objet le support mémoire ainsi obtenu et le lecteur optique y associé. Un tel support mémoire est lisible par un rayonnement concentré et restitue une onde plane pour chaque microélément diffractant.
FR7631866A 1976-10-22 1976-10-22 Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support Granted FR2368780A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631866A FR2368780A1 (fr) 1976-10-22 1976-10-22 Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631866A FR2368780A1 (fr) 1976-10-22 1976-10-22 Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support

Publications (2)

Publication Number Publication Date
FR2368780A1 true FR2368780A1 (fr) 1978-05-19
FR2368780B1 FR2368780B1 (fr) 1979-02-23

Family

ID=9179098

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631866A Granted FR2368780A1 (fr) 1976-10-22 1976-10-22 Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support

Country Status (1)

Country Link
FR (1) FR2368780A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000334A1 (fr) * 1985-07-04 1987-01-15 Holodisc Limited Reproduction des supports de memorisation de donnees optiques
EP0271300A2 (fr) * 1986-12-06 1988-06-15 THORN EMI plc Copie de supports portant des informations enregistrées numériquement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1585193A (fr) * 1967-09-27 1970-01-09
FR2124096A2 (fr) * 1971-02-04 1972-09-22 Comp Generale Electricite
GB1351202A (en) * 1969-12-29 1974-04-24 Krone Gmbh Method of and means for halographically recording and reproducing information
US3911230A (en) * 1970-05-23 1975-10-07 Seiscom Delta Inc Holographic reproduction of sound

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1585193A (fr) * 1967-09-27 1970-01-09
GB1351202A (en) * 1969-12-29 1974-04-24 Krone Gmbh Method of and means for halographically recording and reproducing information
US3911230A (en) * 1970-05-23 1975-10-07 Seiscom Delta Inc Holographic reproduction of sound
FR2124096A2 (fr) * 1971-02-04 1972-09-22 Comp Generale Electricite

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987000334A1 (fr) * 1985-07-04 1987-01-15 Holodisc Limited Reproduction des supports de memorisation de donnees optiques
EP0271300A2 (fr) * 1986-12-06 1988-06-15 THORN EMI plc Copie de supports portant des informations enregistrées numériquement
US4943126A (en) * 1986-12-06 1990-07-24 Thorn Emi Plc Replication of carriers bearing digitally recorded information
EP0271300A3 (en) * 1986-12-06 1990-11-28 Thorn Emi Plc Replication of carriers bearing digitally recorded information

Also Published As

Publication number Publication date
FR2368780B1 (fr) 1979-02-23

Similar Documents

Publication Publication Date Title
GB1362418A (en) Recording of a focussed image
JPS5345506A (en) Information detecting apparatus
CA2022016A1 (fr) Systeme d'exposition holographique pour reduire le bruit
FR2368780A1 (fr) Procede de reproduction d'information enregistree sous forme d'elements diffractants, support memoire ainsi obtenu et lecteur optique d'un tel support
AU585201B2 (en) Method of producing and reproducing holograms
GB1372083A (en) Sound records and reproducing apparatus
ES392240A1 (es) Procedimiento para formar hologramas en un soporte de re- gistro para y reconstruir figuras objeto de dos dimensio- nes.
GB1342480A (en) Record duplication
ES8505487A1 (es) Un metodo de registrar informacion en forma de una pista de areas magnetizadas, en un soporte de registro magnetico-optico
JPS57158039A (en) Magnetic transfer recorder
MY130548A (en) Optical tape duplicator
JPS5345204A (en) Tracking method for disk-type recording medium
ES396015A1 (es) Un metodo para registrar un holograma sintetico de imagen enfocada sobre un medio de registro fotosensible.
GB1522951A (en) Method of duplication of a video frequency signal recording
JPS5221829A (en) Film reording and reproducing device of continuous feed
JPS57117072A (en) Optical pattern recognition device
JPS533202A (en) Information reproducer
JPS5328404A (en) Optical information re producer
JPS5374403A (en) Optical imformation recorder
JPS53100808A (en) Detection for focal point and system therefor
JPS54137219A (en) Record/reproduction system for information signal
JPS54102141A (en) Forming method of fourier transformation hologram
JPS5362502A (en) Optical recording-reproducing apparatus
JPS51122345A (en) Regenerative method for hologram recording
JPS53148913A (en) Optical signal reproducer

Legal Events

Date Code Title Description
ST Notification of lapse