GB1474038A - Photographic exposure control mechanism - Google Patents

Photographic exposure control mechanism

Info

Publication number
GB1474038A
GB1474038A GB2129074A GB2129074A GB1474038A GB 1474038 A GB1474038 A GB 1474038A GB 2129074 A GB2129074 A GB 2129074A GB 2129074 A GB2129074 A GB 2129074A GB 1474038 A GB1474038 A GB 1474038A
Authority
GB
United Kingdom
Prior art keywords
pulse
reverse
pulses
forward drive
generator
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
GB2129074A
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
Application filed by Polaroid Corp filed Critical Polaroid Corp
Publication of GB1474038A publication Critical patent/GB1474038A/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
    • G03B7/08—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
    • G03B7/095—Digital circuits for control of aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)
  • Control Of Stepping Motors (AREA)
  • Stroboscope Apparatuses (AREA)
GB2129074A 1973-05-22 1974-05-14 Photographic exposure control mechanism Expired GB1474038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36266473A 1973-05-22 1973-05-22

Publications (1)

Publication Number Publication Date
GB1474038A true GB1474038A (en) 1977-05-18

Family

ID=23427023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2129074A Expired GB1474038A (en) 1973-05-22 1974-05-14 Photographic exposure control mechanism

Country Status (8)

Country Link
JP (1) JPS571810B2 (cs)
CA (1) CA1019611A (cs)
DD (1) DD115230A5 (cs)
DE (1) DE2424030C2 (cs)
FR (1) FR2231030B1 (cs)
GB (1) GB1474038A (cs)
IT (1) IT1003725B (cs)
NL (1) NL7406583A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9791690B2 (en) 2012-05-29 2017-10-17 Siemens Healthcare Diagnostics Inc. Shutter assembly for a luminescence-based sample analyzer

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747782Y2 (cs) * 1978-03-30 1982-10-20
JPS56101131A (en) * 1980-01-17 1981-08-13 Copal Co Ltd Driving circuit of electromagnetic shutter for single-lens reflex camera
JPS56134020U (cs) * 1980-12-26 1981-10-12
JPS58149026A (ja) * 1982-03-01 1983-09-05 Copal Co Ltd 電磁駆動プログラムシヤツタ−の制御回路
JPH0625837B2 (ja) * 1984-05-09 1994-04-06 株式会社精工舎 カメラ用シヤツタ
JPS63188678U (cs) * 1987-05-26 1988-12-02
JPS63312142A (ja) * 1987-06-15 1988-12-20 Sumitomo Bakelite Co Ltd 熱硬化性樹脂化粧板
JPH02106418U (cs) * 1989-02-04 1990-08-23

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641889A (en) * 1970-09-02 1972-02-15 Polaroid Corp Exposure control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9791690B2 (en) 2012-05-29 2017-10-17 Siemens Healthcare Diagnostics Inc. Shutter assembly for a luminescence-based sample analyzer
US10078215B2 (en) 2012-05-29 2018-09-18 Siemens Healthcare Diagnostics Inc. Shutter assembly for a luminescence-based sample analyzer

Also Published As

Publication number Publication date
CA1019611A (en) 1977-10-25
AU6882574A (en) 1975-11-13
DE2424030A1 (de) 1974-12-12
IT1003725B (it) 1976-06-10
FR2231030B1 (cs) 1978-12-01
JPS5011432A (cs) 1975-02-05
FR2231030A1 (cs) 1974-12-20
DE2424030C2 (de) 1984-08-16
NL7406583A (cs) 1974-11-26
JPS571810B2 (cs) 1982-01-13
DD115230A5 (cs) 1975-09-12

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Legal Events

Date Code Title Description
PS Patent sealed