FR2406837A1 - Dispositif d'exposition automatique d'eclairage pour cameras de microfilmage cinematiques - Google Patents

Dispositif d'exposition automatique d'eclairage pour cameras de microfilmage cinematiques

Info

Publication number
FR2406837A1
FR2406837A1 FR7828633A FR7828633A FR2406837A1 FR 2406837 A1 FR2406837 A1 FR 2406837A1 FR 7828633 A FR7828633 A FR 7828633A FR 7828633 A FR7828633 A FR 7828633A FR 2406837 A1 FR2406837 A1 FR 2406837A1
Authority
FR
France
Prior art keywords
cameras
microfilmage
cinematic
exposure device
automatic exposure
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
FR7828633A
Other languages
English (en)
Other versions
FR2406837B1 (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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of FR2406837A1 publication Critical patent/FR2406837A1/fr
Application granted granted Critical
Publication of FR2406837B1 publication Critical patent/FR2406837B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

L'invention se rapporte aux caméras pour microfilms. Le réglage de l'exposition de cette caméra est commandé par un diaphragme tournant dont la position est commandée par un signal de consigne correspondant à la luminosité du document à reproduire. Un potentiomètre donne un signal de valeur réelle de la position, un comparateur compare les deux signaux et produit un signal de réglage qui commande le moteur directement couplé à l'arbre du diaphragme. L'invention s'applique notamment aux caméras très rapides (50 000 documents à l'heure).
FR7828633A 1977-10-19 1978-10-06 Dispositif d'exposition automatique d'eclairage pour cameras de microfilmage cinematiques Granted FR2406837A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2746990A DE2746990C2 (de) 1977-10-19 1977-10-19 Belichtungsautomatik für Mikrofilm-Durchlaufaufnahmegeräte

Publications (2)

Publication Number Publication Date
FR2406837A1 true FR2406837A1 (fr) 1979-05-18
FR2406837B1 FR2406837B1 (fr) 1984-12-28

Family

ID=6021793

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7828633A Granted FR2406837A1 (fr) 1977-10-19 1978-10-06 Dispositif d'exposition automatique d'eclairage pour cameras de microfilmage cinematiques

Country Status (5)

Country Link
CA (1) CA1118623A (fr)
DE (1) DE2746990C2 (fr)
FR (1) FR2406837A1 (fr)
GB (1) GB2010507B (fr)
IT (1) IT1106213B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938925C2 (de) * 1979-09-26 1985-01-17 Agfa-Gevaert Ag, 5090 Leverkusen Einrichtung zur Belichtungssteuerung in einem Mikrofilm-Durchlaufaufnahmegerät

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE637355C (de) * 1932-07-29 1936-10-27 Kodak A G Optische Kopiereinrichtung
DE1056920B (de) * 1957-11-07 1959-05-06 Soennecken Fa F Vorrichtung zur automatischen, elektronisch gesteuerten Belichtungs-regelung fuer Mikrofilm-Durchlaufgeraete
DE1214524B (de) * 1965-03-22 1966-04-14 Mikrofilm G M B H Verfahren und Vorrichtung zur Ausuebung desselben zu einer automatischen Belichtungssteuerung bei Microfilm-Durchlaufkameras
FR2107785A5 (fr) * 1970-09-23 1972-05-05 Agfa Gevaert Ag
DE2446240A1 (de) * 1974-09-27 1976-04-08 Agfa Gevaert Ag Mikroaufnahmevorrichtung
FR2332551A1 (fr) * 1975-11-24 1977-06-17 Agfa Gevaert Ag Dispositif pour le reglage automatique de l'exposition pour des appareils de prises de vues en continu sur microfilms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE637355C (de) * 1932-07-29 1936-10-27 Kodak A G Optische Kopiereinrichtung
DE1056920B (de) * 1957-11-07 1959-05-06 Soennecken Fa F Vorrichtung zur automatischen, elektronisch gesteuerten Belichtungs-regelung fuer Mikrofilm-Durchlaufgeraete
DE1214524B (de) * 1965-03-22 1966-04-14 Mikrofilm G M B H Verfahren und Vorrichtung zur Ausuebung desselben zu einer automatischen Belichtungssteuerung bei Microfilm-Durchlaufkameras
FR2107785A5 (fr) * 1970-09-23 1972-05-05 Agfa Gevaert Ag
DE2446240A1 (de) * 1974-09-27 1976-04-08 Agfa Gevaert Ag Mikroaufnahmevorrichtung
FR2332551A1 (fr) * 1975-11-24 1977-06-17 Agfa Gevaert Ag Dispositif pour le reglage automatique de l'exposition pour des appareils de prises de vues en continu sur microfilms

Also Published As

Publication number Publication date
FR2406837B1 (fr) 1984-12-28
IT7851536A0 (it) 1978-10-17
IT1106213B (it) 1985-11-11
GB2010507B (en) 1982-05-26
CA1118623A (fr) 1982-02-23
DE2746990B1 (de) 1979-03-01
DE2746990C2 (de) 1979-10-25
GB2010507A (en) 1979-06-27

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Legal Events

Date Code Title Description
ST Notification of lapse