GB1529209A - Automatic exposure control system - Google Patents

Automatic exposure control system

Info

Publication number
GB1529209A
GB1529209A GB5291575A GB5291575A GB1529209A GB 1529209 A GB1529209 A GB 1529209A GB 5291575 A GB5291575 A GB 5291575A GB 5291575 A GB5291575 A GB 5291575A GB 1529209 A GB1529209 A GB 1529209A
Authority
GB
United Kingdom
Prior art keywords
exposure
interceptor
blades
control
energizes
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
GB5291575A
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.)
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 GB1529209A publication Critical patent/GB1529209A/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
    • G03B7/16—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)
  • Shutters For Cameras (AREA)
GB5291575A 1975-01-02 1975-12-24 Automatic exposure control system Expired GB1529209A (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 (1)

Publication Number Publication Date
GB1529209A true GB1529209A (en) 1978-10-18

Family

ID=24145529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5291575A Expired GB1529209A (en) 1975-01-02 1975-12-24 Automatic exposure control system

Country Status (5)

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

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 (ja) * 1983-04-13 1984-10-26 Fuji Photo Optical Co Ltd シヤツタの最大開口径規制装置
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 (de) * 1970-12-24 1981-06-11 Polaroid Corp., 02139 Cambridge, Mass. Photographischer Apparat
US3832722A (en) * 1971-08-03 1974-08-27 Polaroid Corp Apparatus and system for flash photography

Also Published As

Publication number Publication date
FR2296867B1 (enrdf_load_stackoverflow) 1982-11-12
CA1061625A (en) 1979-09-04
JPS5194224A (enrdf_load_stackoverflow) 1976-08-18
JPS6148139B2 (enrdf_load_stackoverflow) 1986-10-22
DE2558253A1 (de) 1976-07-08
FR2296867A1 (fr) 1976-07-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19931224