FR2380576A1 - Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction - Google Patents

Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction

Info

Publication number
FR2380576A1
FR2380576A1 FR7704194A FR7704194A FR2380576A1 FR 2380576 A1 FR2380576 A1 FR 2380576A1 FR 7704194 A FR7704194 A FR 7704194A FR 7704194 A FR7704194 A FR 7704194A FR 2380576 A1 FR2380576 A1 FR 2380576A1
Authority
FR
France
Prior art keywords
obstacle
reproduction
liquid crystal
support
liq
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
FR7704194A
Other languages
English (en)
Other versions
FR2380576B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7704194A priority Critical patent/FR2380576A1/fr
Publication of FR2380576A1 publication Critical patent/FR2380576A1/fr
Application granted granted Critical
Publication of FR2380576B1 publication Critical patent/FR2380576B1/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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/02—Marking or applying text
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention est relative à un procédé pour porter des indications ou repères sur un support d'enregistrement et/ou de reproduction. Dans un procédé selon l'invention, on utilise une surface dont les propriétés physiques ou chimiques varient lorsqu'elle est frappée par un rayonnement tel qu'un rayonnement lumineux, ainsi qu'une source de rayonnement disposée pour venir frapper ladite surface afin de modifier ses proprietés et on place un obstacle, susceptible d'arrêter au moins partiellement ledit rayonnement, entre la source de rayonnement et ladite surface, cet obstacle ayant une disposition correspondant aux indications ou repères qu'on désire porter sur le support, et étant constitué par au moins un cristal liquide excité électriquement et dont on fait varier la transparence en agissant sur sa tension d'excitation en fonction des indications ou repères qu'on désire porter sur le support. Application au marquage ou datage de photographies ou reproductions, visualisation d'informations.
FR7704194A 1977-02-15 1977-02-15 Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction Granted FR2380576A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7704194A FR2380576A1 (fr) 1977-02-15 1977-02-15 Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7704194A FR2380576A1 (fr) 1977-02-15 1977-02-15 Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction

Publications (2)

Publication Number Publication Date
FR2380576A1 true FR2380576A1 (fr) 1978-09-08
FR2380576B1 FR2380576B1 (fr) 1979-06-01

Family

ID=9186745

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7704194A Granted FR2380576A1 (fr) 1977-02-15 1977-02-15 Procede pour porter des indications ou reperes sur un support d'enregistrement et/ou de reproduction

Country Status (1)

Country Link
FR (1) FR2380576A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576364A (en) * 1969-05-20 1971-04-27 Rca Corp Color advertising display employing liquid crystal
FR2164225A5 (fr) * 1971-12-03 1973-07-27 Bbc Brown Boveri & Cie
FR2266199A1 (fr) * 1974-03-29 1975-10-24 Xerox Corp
DE2429990A1 (de) * 1974-06-22 1976-01-08 Kyborg Ges Tragbares datenerfassungsgeraet
FR2285629A1 (fr) * 1974-09-17 1976-04-16 Minnesota Mining & Mfg Dispositif de projection
US3983571A (en) * 1975-06-30 1976-09-28 Rca Corporation Electronic image identifying system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576364A (en) * 1969-05-20 1971-04-27 Rca Corp Color advertising display employing liquid crystal
FR2164225A5 (fr) * 1971-12-03 1973-07-27 Bbc Brown Boveri & Cie
FR2266199A1 (fr) * 1974-03-29 1975-10-24 Xerox Corp
DE2429990A1 (de) * 1974-06-22 1976-01-08 Kyborg Ges Tragbares datenerfassungsgeraet
FR2285629A1 (fr) * 1974-09-17 1976-04-16 Minnesota Mining & Mfg Dispositif de projection
US3983571A (en) * 1975-06-30 1976-09-28 Rca Corporation Electronic image identifying system

Also Published As

Publication number Publication date
FR2380576B1 (fr) 1979-06-01

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Legal Events

Date Code Title Description
ST Notification of lapse