GB1532452A - Exposure regulating circuit and device - Google Patents

Exposure regulating circuit and device

Info

Publication number
GB1532452A
GB1532452A GB46197/75A GB4619775A GB1532452A GB 1532452 A GB1532452 A GB 1532452A GB 46197/75 A GB46197/75 A GB 46197/75A GB 4619775 A GB4619775 A GB 4619775A GB 1532452 A GB1532452 A GB 1532452A
Authority
GB
United Kingdom
Prior art keywords
motor
triggered
stages
voltage
diaphragm
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.)
Expired
Application number
GB46197/75A
Other languages
English (en)
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
Priority claimed from DE19742453285 external-priority patent/DE2453285C2/de
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1532452A publication Critical patent/GB1532452A/en
Expired 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
    • 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)
  • Control Of Stepping Motors (AREA)
  • Shutters For Cameras (AREA)
  • Diaphragms For Cameras (AREA)
GB46197/75A 1974-11-09 1975-11-07 Exposure regulating circuit and device Expired GB1532452A (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
GB1532452A true GB1532452A (en) 1978-11-15

Family

ID=5930474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46197/75A Expired GB1532452A (en) 1974-11-09 1975-11-07 Exposure regulating circuit and device

Country Status (7)

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

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 (OSRAM) * 1970-04-16 1971-01-15 Canon Kk
FR2065556B1 (OSRAM) * 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 (OSRAM) * 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
AT348335B (de) 1979-02-12
CH598611A5 (OSRAM) 1978-05-12
HK49879A (en) 1979-07-27
DE2453285B1 (de) 1976-04-08
JPS5172331A (OSRAM) 1976-06-23
ATA690175A (de) 1978-06-15
US4079391A (en) 1978-03-14
FR2290683A1 (fr) 1976-06-04
JPS5328773B2 (OSRAM) 1978-08-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee