FR2296867A1 - EXPOSURE CONTROL SYSTEM FOR CAMERA - Google Patents

EXPOSURE CONTROL SYSTEM FOR CAMERA

Info

Publication number
FR2296867A1
FR2296867A1 FR7540127A FR7540127A FR2296867A1 FR 2296867 A1 FR2296867 A1 FR 2296867A1 FR 7540127 A FR7540127 A FR 7540127A FR 7540127 A FR7540127 A FR 7540127A FR 2296867 A1 FR2296867 A1 FR 2296867A1
Authority
FR
France
Prior art keywords
camera
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.)
Granted
Application number
FR7540127A
Other languages
French (fr)
Other versions
FR2296867B1 (en
Inventor
Bruce K Johnson
George D Whiteside
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 US05/538,108 external-priority patent/US3975744A/en
Application filed by Polaroid Corp filed Critical Polaroid Corp
Publication of FR2296867A1 publication Critical patent/FR2296867A1/en
Application granted granted Critical
Publication of FR2296867B1 publication Critical patent/FR2296867B1/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
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
    • 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
    • G03B7/087—Analogue circuits for control of both exposure time and aperture
    • 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
    • G03B7/091—Digital circuits
    • G03B7/097—Digital circuits for control of both exposure time and aperture
    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/36—Sliding rigid plate
    • G03B9/40—Double plate
FR7540127A 1975-01-02 1975-12-30 EXPOSURE CONTROL SYSTEM FOR CAMERA Granted FR2296867A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/538,108 US3975744A (en) 1974-08-05 1975-01-02 Automatic exposure control system

Publications (2)

Publication Number Publication Date
FR2296867A1 true FR2296867A1 (en) 1976-07-30
FR2296867B1 FR2296867B1 (en) 1982-11-12

Family

ID=24145529

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7540127A Granted FR2296867A1 (en) 1975-01-02 1975-12-30 EXPOSURE CONTROL SYSTEM FOR CAMERA

Country Status (5)

Country Link
JP (1) JPS6148139B2 (en)
CA (1) CA1061625A (en)
DE (1) DE2558253A1 (en)
FR (1) FR2296867A1 (en)
GB (1) GB1529209A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306786A (en) * 1980-12-19 1981-12-22 Polaroid Corporation Photographic exposure control with scene light integration level determined as function of pre-exposure ambient scene light detect
JPS59189328A (en) * 1983-04-13 1984-10-26 Fuji Photo Optical Co Ltd Specifying device for maximum aperture diameter of shutter
US10136210B2 (en) 2015-03-17 2018-11-20 Koss Corporation Personal acoustic systems and flexible earpiece mounts for the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326103A (en) * 1964-12-09 1967-06-20 Polaroid Corp Auxiliary shutter timing mechanism
US3464332A (en) * 1966-05-12 1969-09-02 Polaroid Corp Automatic exposure control system
DE2163294C3 (en) * 1970-12-24 1981-06-11 Polaroid Corp., 02139 Cambridge, Mass. Photographic apparatus
US3832722A (en) * 1971-08-03 1974-08-27 Polaroid Corp Apparatus and system for flash photography

Also Published As

Publication number Publication date
JPS6148139B2 (en) 1986-10-22
GB1529209A (en) 1978-10-18
JPS5194224A (en) 1976-08-18
DE2558253A1 (en) 1976-07-08
CA1061625A (en) 1979-09-04
FR2296867B1 (en) 1982-11-12

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Legal Events

Date Code Title Description
ST Notification of lapse