GB1401117A - Quantized representation circuit - Google Patents

Quantized representation circuit

Info

Publication number
GB1401117A
GB1401117A GB3982673A GB3982673A GB1401117A GB 1401117 A GB1401117 A GB 1401117A GB 3982673 A GB3982673 A GB 3982673A GB 3982673 A GB3982673 A GB 3982673A GB 1401117 A GB1401117 A GB 1401117A
Authority
GB
United Kingdom
Prior art keywords
voltage
proportional
exposure
base
shutter
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
GB3982673A
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB1401117A publication Critical patent/GB1401117A/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
    • 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
    • G03B7/003—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly setting of both shutter and diaphragm
    • 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)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB3982673A 1972-09-11 1973-08-22 Quantized representation circuit Expired GB1401117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9103072A JPS5340337B2 (enrdf_load_stackoverflow) 1972-09-11 1972-09-11

Publications (1)

Publication Number Publication Date
GB1401117A true GB1401117A (en) 1975-07-16

Family

ID=14015110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3982673A Expired GB1401117A (en) 1972-09-11 1973-08-22 Quantized representation circuit

Country Status (3)

Country Link
JP (1) JPS5340337B2 (enrdf_load_stackoverflow)
FR (1) FR2199409A5 (enrdf_load_stackoverflow)
GB (1) GB1401117A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5137628A (enrdf_load_stackoverflow) * 1974-09-26 1976-03-30 Canon Kk

Also Published As

Publication number Publication date
FR2199409A5 (enrdf_load_stackoverflow) 1974-04-05
JPS4949627A (enrdf_load_stackoverflow) 1974-05-14
JPS5340337B2 (enrdf_load_stackoverflow) 1978-10-26
DE2345343B2 (de) 1976-01-02
DE2345343A1 (de) 1974-03-28

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930821