FR2296169A1 - Circuit photometrique a reponse rapide - Google Patents

Circuit photometrique a reponse rapide

Info

Publication number
FR2296169A1
FR2296169A1 FR7539756A FR7539756A FR2296169A1 FR 2296169 A1 FR2296169 A1 FR 2296169A1 FR 7539756 A FR7539756 A FR 7539756A FR 7539756 A FR7539756 A FR 7539756A FR 2296169 A1 FR2296169 A1 FR 2296169A1
Authority
FR
France
Prior art keywords
quick response
photometric circuit
photometric
circuit
quick
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
FR7539756A
Other languages
English (en)
Other versions
FR2296169B1 (fr
Inventor
Tokuichi Tsunekawa
Tetsuya Taguchi
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.)
Canon Inc
Original Assignee
Canon Inc
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 JP249775A external-priority patent/JPS5178675A/ja
Priority claimed from JP50082116A external-priority patent/JPS5949528B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of FR2296169A1 publication Critical patent/FR2296169A1/fr
Application granted granted Critical
Publication of FR2296169B1 publication Critical patent/FR2296169B1/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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Amplifiers (AREA)
FR7539756A 1974-12-28 1975-12-24 Circuit photometrique a reponse rapide Granted FR2296169A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP249775A JPS5178675A (ja) 1974-12-28 1974-12-28 Chokuryuzofukukairono katoototokuseino kaizenhoshiki
JP50082116A JPS5949528B2 (ja) 1975-07-02 1975-07-02 測光回路

Publications (2)

Publication Number Publication Date
FR2296169A1 true FR2296169A1 (fr) 1976-07-23
FR2296169B1 FR2296169B1 (fr) 1979-05-04

Family

ID=26335880

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7539756A Granted FR2296169A1 (fr) 1974-12-28 1975-12-24 Circuit photometrique a reponse rapide

Country Status (3)

Country Link
US (1) US4076977A (fr)
DE (1) DE2558155C3 (fr)
FR (1) FR2296169A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176929A (en) * 1977-06-21 1979-12-04 Canon Kabushiki Kaisha Exposure control device for a camera
JPS6031249B2 (ja) * 1977-07-29 1985-07-20 株式会社日立製作所 測光増幅回路
JPS55124121A (en) * 1979-03-02 1980-09-25 Olympus Optical Co Ltd Analog switch circuit for triggering exposure control circuit
DD151357A1 (de) * 1980-06-06 1981-10-14 Hans Jehmlich Schaltungsanordnung zur verringerung der einschwingzeit
DE3427055A1 (de) * 1984-07-23 1986-01-30 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Schaltungsanordnung fuer einen elektronischen belichtungsmesser
JPS5946521A (ja) * 1982-09-08 1984-03-15 Canon Inc 測光回路
FR2540625A1 (fr) * 1983-02-04 1984-08-10 Somfy Capteur d'intensite lumineuse
US4711546A (en) * 1983-10-19 1987-12-08 Canon Kabushiki Kaisha Photometric circuit
GB2179178B (en) * 1985-06-25 1989-03-30 Canon Kk Light measuring device for flash exposure system
DE3534808A1 (de) * 1985-09-30 1987-04-02 Leitz Ernst Gmbh Schaltungsanordnung zur verringerung der einschwingzeit
DE4006504A1 (de) * 1990-03-02 1991-09-05 Telefunken Electronic Gmbh Schaltungsanordnung fuer opto-schmitt-trigger
JP3136660B2 (ja) * 1991-06-24 2001-02-19 株式会社ニコン 測光回路
CN1934912A (zh) * 2004-03-31 2007-03-21 先锋株式会社 照明控制电路
RU2511966C1 (ru) * 2012-12-24 2014-04-10 Открытое акционерное общество "Загорский оптико-механический завод" Устройство подачи воздуха в фотометре пламенном

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885880A (en) * 1972-11-09 1975-05-27 Canon Kk Light sensing device with auxiliary illumination

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523189A (en) * 1968-05-23 1970-08-04 Trw Inc Light-sensitive circuit in which the effective load of a phototransistor is bootstrapped
GB1307838A (en) * 1969-07-17 1973-02-21 Vickers Ltd Apparatus for and a method of reducing the effect of noise in the output current of a photoemissive cell
US3743837A (en) * 1972-01-20 1973-07-03 Data Source Corp Phototransistor automatic gain control
US3813539A (en) * 1973-01-31 1974-05-28 Rohm & Haas Electro-optical coupler unit
US3835313A (en) * 1973-04-10 1974-09-10 Schumm G Arrangement for compensating for changes in the operating characteristics of a measuring element
US3872329A (en) * 1974-03-07 1975-03-18 Rca Corp Radiation sensing circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885880A (en) * 1972-11-09 1975-05-27 Canon Kk Light sensing device with auxiliary illumination

Also Published As

Publication number Publication date
US4076977A (en) 1978-02-28
DE2558155C3 (de) 1978-10-19
FR2296169B1 (fr) 1979-05-04
DE2558155A1 (de) 1976-11-18
DE2558155B2 (fr) 1978-03-02

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