CH620524A5 - - Google Patents

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Publication number
CH620524A5
CH620524A5 CH1196777A CH1196777A CH620524A5 CH 620524 A5 CH620524 A5 CH 620524A5 CH 1196777 A CH1196777 A CH 1196777A CH 1196777 A CH1196777 A CH 1196777A CH 620524 A5 CH620524 A5 CH 620524A5
Authority
CH
Switzerland
Prior art keywords
diaphragm
intensity
instantaneous
signal
closing
Prior art date
Application number
CH1196777A
Other languages
English (en)
French (fr)
Inventor
Charles-Louis Rochat
Original Assignee
Pignons 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 Pignons Sa filed Critical Pignons Sa
Priority to CH1196777A priority Critical patent/CH620524A5/fr
Priority to SE7713752A priority patent/SE7713752L/xx
Priority to US05/862,979 priority patent/US4146318A/en
Priority to GB54250/77A priority patent/GB1597518A/en
Priority to DE19782800708 priority patent/DE2800708A1/de
Priority to JP261878A priority patent/JPS5454633A/ja
Priority to FR7801812A priority patent/FR2404869A1/fr
Publication of CH620524A5 publication Critical patent/CH620524A5/fr

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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/081—Analogue circuits
    • G03B7/085—Analogue circuits for control of aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
CH1196777A 1977-09-30 1977-09-30 CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CH1196777A CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-09-30 1977-09-30
SE7713752A SE7713752L (sv) 1977-09-30 1977-12-05 Sett och anordning for reglering av stengningsrorelsen hos en kameraslutare
US05/862,979 US4146318A (en) 1977-09-30 1977-12-21 Automatic diaphragm control
GB54250/77A GB1597518A (en) 1977-09-30 1977-12-30 Process for controlling the closure of a diaphragm in a camera and device for implementing this process
DE19782800708 DE2800708A1 (de) 1977-09-30 1978-01-09 Verfahren zur steuerung der schliessung einer blende fuer einen fotoapparat und einrichtung zur durchfuehrung dieses verfahrens
JP261878A JPS5454633A (en) 1977-09-30 1978-01-13 Method of and device for controlling opening of throttle for camera
FR7801812A FR2404869A1 (fr) 1977-09-30 1978-01-23 Procede pour commander la fermeture d'un diaphragme dans un appareil photographique, et dispositif pour la mise en oeuvre de ce procede

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1196777A CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-09-30 1977-09-30

Publications (1)

Publication Number Publication Date
CH620524A5 true CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-11-28

Family

ID=4378573

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1196777A CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-09-30 1977-09-30

Country Status (7)

Country Link
US (1) US4146318A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5454633A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH620524A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2800708A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2404869A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1597518A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE7713752L (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478124A (en) * 1977-12-03 1979-06-22 Nippon Chemical Ind Automatic exposure control camera display unit
US4305647A (en) * 1978-07-10 1981-12-15 Minolta Camera Kabushiki Kaisha Camera flash photography systems
JPS56111841A (en) * 1980-02-08 1981-09-03 Canon Inc Exposure control system of camera using physical aperture
JPS57200017A (en) * 1981-06-03 1982-12-08 Sony Corp Aperture locking device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015198A (en) * 1973-12-26 1977-03-29 Canon Kabushiki Kaisha Shutter-time-preference single lens reflex camera with automatic film wind-up

Also Published As

Publication number Publication date
GB1597518A (en) 1981-09-09
US4146318A (en) 1979-03-27
FR2404869A1 (fr) 1979-04-27
SE7713752L (sv) 1979-03-31
DE2800708A1 (de) 1979-04-12
JPS5454633A (en) 1979-05-01

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Legal Events

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PL Patent ceased
PL Patent ceased