CA1017187A - Electromagnetically regulated exposure control system - Google Patents

Electromagnetically regulated exposure control system

Info

Publication number
CA1017187A
CA1017187A CA197,308A CA197308A CA1017187A CA 1017187 A CA1017187 A CA 1017187A CA 197308 A CA197308 A CA 197308A CA 1017187 A CA1017187 A CA 1017187A
Authority
CA
Canada
Prior art keywords
control system
exposure control
regulated exposure
electromagnetically
electromagnetically regulated
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
CA197,308A
Other languages
English (en)
Other versions
CA197308S (en
Inventor
Christian C. Petersen
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
Application granted granted Critical
Publication of CA1017187A publication Critical patent/CA1017187A/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
    • G03B7/081—Analogue circuits
    • 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
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Cameras In General (AREA)
  • Diaphragms For Cameras (AREA)
CA197,308A 1973-04-11 1974-04-10 Electromagnetically regulated exposure control system Expired CA1017187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US350025A US3927415A (en) 1973-04-11 1973-04-11 Electromagnetically regulated exposure control system

Publications (1)

Publication Number Publication Date
CA1017187A true CA1017187A (en) 1977-09-13

Family

ID=23374935

Family Applications (1)

Application Number Title Priority Date Filing Date
CA197,308A Expired CA1017187A (en) 1973-04-11 1974-04-10 Electromagnetically regulated exposure control system

Country Status (6)

Country Link
US (1) US3927415A (de)
JP (1) JPS589931B2 (de)
CA (1) CA1017187A (de)
DE (1) DE2417380C2 (de)
FR (1) FR2225764B1 (de)
GB (1) GB1429135A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017873A (en) * 1975-10-03 1977-04-12 Polaroid Corporation Exposure control system with braking capability
JPS5293322A (en) * 1976-02-02 1977-08-05 Fuji Photo Film Co Ltd Electromagnetic shutter
US4112450A (en) * 1976-02-18 1978-09-05 Fuji Photo Film Co., Ltd. Shutter device for a photographic camera
JPS5458024A (en) * 1977-10-17 1979-05-10 Nippon Chemical Ind Spring servo throttle controller for camera
US4209243A (en) * 1978-12-01 1980-06-24 Polaroid Corporation Shutter and trim apparatus
US4494846A (en) * 1981-10-27 1985-01-22 Copal Company Limited Electromagnetic shutter
JP2539180Y2 (ja) * 1991-01-23 1997-06-25 旭光学工業株式会社 シャッターの開閉制御装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230853A (en) * 1961-01-20 1966-01-25 Durst S P A Fabrica Macchine E Photographic lens shutter mechanism
US3373672A (en) * 1963-07-03 1968-03-19 Hattori Tokeiten Kk Lens shutter
DE1258258B (de) * 1965-03-13 1968-01-04 Agfa Gevaert Ag Blendenverschluss
US3604330A (en) * 1967-09-19 1971-09-14 Compur Werk Gmbh & Co Magnetically driven photographic shutter with braking
DE2013853A1 (de) * 1969-03-25 1970-10-29 Fuji Photo Film Co.Ltd., Kanagawa (Japan) Elektromagnetischer Verschluß einer Kamera
DE7010968U (de) * 1969-03-26 1970-08-27 Minolta Camera Kk Ausloesesicherheitsvorrichtung fuer eine die belichtung automatisch einstellende kamera.
DE2031565C3 (de) * 1970-06-26 1974-04-04 Rollei-Werke Franke & Heidecke, 3300 Braunschweig Elektromagnetischer Lamellenantrieb an fotografischen Objektiwer Schlüssen
US3641889A (en) * 1970-09-02 1972-02-15 Polaroid Corp Exposure control system
DE2164484B2 (de) * 1970-12-25 1978-08-03 Minolta Camera K.K., Osaka (Japan) Elektronisch gesteuerter Blendenverschluß
US3744385A (en) * 1971-12-29 1973-07-10 Polaroid Corp Control system for photographic apparatus
DE2209913C2 (de) * 1972-03-02 1984-05-10 Rollei Fototechnic GmbH, 3300 Braunschweig Elektromagnetischer Lamellenantrieb an fotografischen Objektivverschlüssen

Also Published As

Publication number Publication date
USB350025I5 (de) 1975-01-28
FR2225764A1 (de) 1974-11-08
JPS589931B2 (ja) 1983-02-23
DE2417380A1 (de) 1974-10-31
FR2225764B1 (de) 1978-01-20
JPS5013035A (de) 1975-02-10
US3927415A (en) 1975-12-16
DE2417380C2 (de) 1983-01-20
GB1429135A (en) 1976-03-24

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