HK49879A - Exposure regulating circuit and device - Google Patents

Exposure regulating circuit and device

Info

Publication number
HK49879A
HK49879A HK498/79A HK49879A HK49879A HK 49879 A HK49879 A HK 49879A HK 498/79 A HK498/79 A HK 498/79A HK 49879 A HK49879 A HK 49879A HK 49879 A HK49879 A HK 49879A
Authority
HK
Hong Kong
Prior art keywords
regulating circuit
exposure regulating
exposure
circuit
regulating
Prior art date
Application number
HK498/79A
Other languages
English (en)
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
Priority claimed from DE19742453285 external-priority patent/DE2453285C2/de
Application filed by Agfa Gevaert Ag filed Critical Agfa Gevaert Ag
Publication of HK49879A publication Critical patent/HK49879A/xx

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)
  • Control Of Non-Electrical Variables (AREA)
  • Diaphragms For Cameras (AREA)
  • Control Of Stepping Motors (AREA)
  • Shutters For Cameras (AREA)
HK498/79A 1974-11-09 1979-07-19 Exposure regulating circuit and device HK49879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742453285 DE2453285C2 (de) 1974-11-09 Regelvorrichtung für fotografische Geräte

Publications (1)

Publication Number Publication Date
HK49879A true HK49879A (en) 1979-07-27

Family

ID=5930474

Family Applications (1)

Application Number Title Priority Date Filing Date
HK498/79A HK49879A (en) 1974-11-09 1979-07-19 Exposure regulating circuit and device

Country Status (7)

Country Link
US (1) US4079391A (fr)
JP (1) JPS5328773B2 (fr)
AT (1) AT348335B (fr)
CH (1) CH598611A5 (fr)
FR (1) FR2290683A1 (fr)
GB (1) GB1532452A (fr)
HK (1) HK49879A (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430053A (en) * 1967-08-24 1969-02-25 Lawrence A Westhaver Method for aperture control in which the loop gain is caused to vanish when the absolute value of the error is less than a given value and is caused to assume its nominal value when the absolute value of the error is greater than a second given value
FR2039240A1 (fr) * 1970-04-16 1971-01-15 Canon Kk
FR2065556B1 (fr) * 1970-10-27 1974-04-26 Canon Kk
DE2158928A1 (de) * 1970-12-15 1972-07-06 Hauser Raimund Schaltungsanordnung
US3890550A (en) * 1971-05-28 1975-06-17 Canon Kk Differential amplifier circuit for servo system
AT325944B (de) * 1972-03-25 1975-11-10 Agfa Gevaert Ag Photographische oder kinematographische kamera
US3882522A (en) * 1973-05-22 1975-05-06 Polaroid Corp Non-cocking springless shutter developing two parameter exposure regulation
FR2249357B1 (fr) * 1973-10-27 1981-05-22 Agfa Gevaert Ag
US3987462A (en) * 1974-10-26 1976-10-19 Agfa-Gevaert, A.G. Equipment for minimizing the power loss in a step motor in a camera
US3972607A (en) * 1974-12-30 1976-08-03 Agfa-Gevaert, A.G. Analog/digital control arrangement for photographic apparatus

Also Published As

Publication number Publication date
GB1532452A (en) 1978-11-15
FR2290683A1 (fr) 1976-06-04
CH598611A5 (fr) 1978-05-12
JPS5328773B2 (fr) 1978-08-16
AT348335B (de) 1979-02-12
DE2453285B1 (de) 1976-04-08
ATA690175A (de) 1978-06-15
US4079391A (en) 1978-03-14
JPS5172331A (fr) 1976-06-23

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