CA995946A - Exposure control system for cameras - Google Patents

Exposure control system for cameras

Info

Publication number
CA995946A
CA995946A CA157,274A CA157274A CA995946A CA 995946 A CA995946 A CA 995946A CA 157274 A CA157274 A CA 157274A CA 995946 A CA995946 A CA 995946A
Authority
CA
Canada
Prior art keywords
cameras
control system
exposure control
exposure
control
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
CA157,274A
Other languages
English (en)
Other versions
CA157274S (en
Inventor
Eisuke Ichinohe
Yuji Tsuda
Masaya Shimomura
Junji Kajiwara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 JP9479471A external-priority patent/JPS4859835A/ja
Priority claimed from JP9479571A external-priority patent/JPS4859836A/ja
Priority claimed from JP9477571A external-priority patent/JPS533650B2/ja
Priority claimed from JP9479671A external-priority patent/JPS5533050B2/ja
Priority claimed from JP4184472A external-priority patent/JPS5312809B2/ja
Priority claimed from JP47041841A external-priority patent/JPS528114B2/ja
Priority claimed from JP47041840A external-priority patent/JPS494526A/ja
Priority claimed from JP47041843A external-priority patent/JPS494957A/ja
Priority claimed from JP47041839A external-priority patent/JPS494525A/ja
Priority claimed from JP47041842A external-priority patent/JPS494527A/ja
Priority claimed from JP47041837A external-priority patent/JPS494523A/ja
Priority claimed from JP47041838A external-priority patent/JPS494524A/ja
Priority claimed from JP8021072A external-priority patent/JPS5322846B2/ja
Priority claimed from JP8021172A external-priority patent/JPS5317055B2/ja
Priority claimed from JP8021372A external-priority patent/JPS4938624A/ja
Priority claimed from JP8021272A external-priority patent/JPS4938623A/ja
Priority claimed from JP8020972A external-priority patent/JPS4937634A/ja
Priority claimed from JP47080214A external-priority patent/JPS4938552A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CA995946A publication Critical patent/CA995946A/en
Application granted granted Critical
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
    • G03B7/083—Analogue circuits for control of exposure time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
CA157,274A 1971-11-24 1972-11-23 Exposure control system for cameras Expired CA995946A (en)

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
JP9479671A JPS5533050B2 (is") 1971-11-24 1971-11-24
JP9479471A JPS4859835A (is") 1971-11-24 1971-11-24
JP9477571A JPS533650B2 (is") 1971-11-24 1971-11-24
JP9479571A JPS4859836A (is") 1971-11-24 1971-11-24
JP47041843A JPS494957A (is") 1972-04-25 1972-04-25
JP47041839A JPS494525A (is") 1972-04-25 1972-04-25
JP47041842A JPS494527A (is") 1972-04-25 1972-04-25
JP4184472A JPS5312809B2 (is") 1972-04-25 1972-04-25
JP47041838A JPS494524A (is") 1972-04-25 1972-04-25
JP47041837A JPS494523A (is") 1972-04-25 1972-04-25
JP47041841A JPS528114B2 (is") 1972-04-25 1972-04-25
JP47041840A JPS494526A (is") 1972-04-25 1972-04-25
JP8021072A JPS5322846B2 (is") 1972-08-09 1972-08-09
JP8021172A JPS5317055B2 (is") 1972-08-09 1972-08-09
JP8021372A JPS4938624A (is") 1972-08-09 1972-08-09
JP8021272A JPS4938623A (is") 1972-08-09 1972-08-09
JP8020972A JPS4937634A (is") 1972-08-09 1972-08-09
JP47080214A JPS4938552A (is") 1972-08-09 1972-08-09

Publications (1)

Publication Number Publication Date
CA995946A true CA995946A (en) 1976-08-31

Family

ID=27586124

Family Applications (1)

Application Number Title Priority Date Filing Date
CA157,274A Expired CA995946A (en) 1971-11-24 1972-11-23 Exposure control system for cameras

Country Status (4)

Country Link
US (1) US3877039A (is")
CA (1) CA995946A (is")
CH (1) CH561915A5 (is")
GB (1) GB1417990A (is")

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581403B2 (ja) * 1973-06-23 1983-01-11 ミノルタ株式会社 光起電力素子を用いた自動露出時間制御回路
JPS5539372Y2 (is") * 1973-07-27 1980-09-13
US4032801A (en) * 1975-10-10 1977-06-28 Honeywell Inc. Electromagnetic radiation intensity comparator apparatus
JPS5946521A (ja) * 1982-09-08 1984-03-15 Canon Inc 測光回路
US5057682A (en) * 1989-12-26 1991-10-15 General Electric Company Quiescent signal compensated photodetector system for large dynamic range and high linearity

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025336B1 (is") * 1967-11-28 1975-08-22
US3690230A (en) * 1969-12-25 1972-09-12 Asahi Optical Co Ltd Electronic circuits for automatic camera controls
JPS4837605B1 (is") * 1970-04-14 1973-11-12
GB1339622A (en) * 1970-06-16 1973-12-05 Asahi Optical Co Ltd Electric shutter control circuit for a single-lens reflex camera
DE2147350C3 (de) * 1970-09-30 1974-05-22 Nippon Kogaku K.K., Tokio Schaltung zur automatischen Steuerung der Belichtungszeit

Also Published As

Publication number Publication date
GB1417990A (en) 1975-12-17
CH561915A5 (is") 1975-05-15
US3877039A (en) 1975-04-08

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