FR2376428A1 - Dispositif et procede dans un appareil de prise de vues pour comprimer selectivement la luminosite de la scene - Google Patents

Dispositif et procede dans un appareil de prise de vues pour comprimer selectivement la luminosite de la scene

Info

Publication number
FR2376428A1
FR2376428A1 FR7800061A FR7800061A FR2376428A1 FR 2376428 A1 FR2376428 A1 FR 2376428A1 FR 7800061 A FR7800061 A FR 7800061A FR 7800061 A FR7800061 A FR 7800061A FR 2376428 A1 FR2376428 A1 FR 2376428A1
Authority
FR
France
Prior art keywords
scene
luminosity
photographic apparatus
selectively compressing
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.)
Granted
Application number
FR7800061A
Other languages
English (en)
Other versions
FR2376428B1 (fr
Inventor
Nathan Gold
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 FR2376428A1 publication Critical patent/FR2376428A1/fr
Application granted granted Critical
Publication of FR2376428B1 publication Critical patent/FR2376428B1/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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • 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)
  • Shutters For Cameras (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

Dispositif de commande d'exposition photographique Il comprend un obturateur à zones multiples et une série d'éléments photosensibles répondant chacun à l'une des zones de la scène et commandant la zone d'obturateur qui transmet les rayons porteurs d'image de cette zone de la scene vers une zone correspondante du film pour comprimer sélectivement la gamme de luminosités de la scène pour ainsi favoriser les détails d'ombre. Application notamment aux appareils de prise de vues photographiques.
FR7800061A 1977-01-03 1978-01-03 Dispositif et procede dans un appareil de prise de vues pour comprimer selectivement la luminosite de la scene Granted FR2376428A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75643377A 1977-01-03 1977-01-03

Publications (2)

Publication Number Publication Date
FR2376428A1 true FR2376428A1 (fr) 1978-07-28
FR2376428B1 FR2376428B1 (fr) 1984-11-02

Family

ID=25043462

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7800061A Granted FR2376428A1 (fr) 1977-01-03 1978-01-03 Dispositif et procede dans un appareil de prise de vues pour comprimer selectivement la luminosite de la scene

Country Status (6)

Country Link
US (1) US4162831A (fr)
JP (1) JPS6029093B2 (fr)
CA (1) CA1081518A (fr)
DE (1) DE2800051C2 (fr)
FR (1) FR2376428A1 (fr)
GB (1) GB1591270A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593295A1 (fr) * 1986-01-20 1987-07-24 Cornuejols Georges Controleur electronique matriciel des parametres d'exposition pour appareil de prise de vues
US5051770A (en) * 1986-01-20 1991-09-24 Scanera S.C. Image processing device for controlling the transfer function of an optical system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4285584A (en) * 1979-10-02 1981-08-25 Polaroid Corporation Photometric device
US4285583A (en) * 1979-11-13 1981-08-25 Polaroid Corporation Photometric device
JPS56113120A (en) * 1980-02-13 1981-09-05 Konishiroku Photo Ind Co Ltd Photographing device
US4497557A (en) * 1982-06-25 1985-02-05 Polaroid Corporation Electromagnetic shutter mechanism
US4621916A (en) * 1983-12-28 1986-11-11 Polaroid Corporation Magnetic positioning and contouring of a blade mechanism
US4541704A (en) * 1984-09-10 1985-09-17 Polaroid Corporation Photographic camera with electronic image enhancement
GB2189328B (en) * 1986-03-03 1990-12-19 Canon Kk Optical system adjustment device for camera
US5023723A (en) * 1988-04-18 1991-06-11 Canon Kabushiki Kaisha Image sensing apparatus having plural image sensors and plural shutters
DE4420637A1 (de) * 1994-06-14 1995-12-21 Bertram Dr Rapp Optische Abbildungsvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2173537A5 (fr) * 1972-02-22 1973-10-05 Eastman Kodak Co

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953983A (en) * 1960-09-27 Photographic shutter
US3116670A (en) * 1963-02-27 1964-01-07 Vincent W Ball Automatic exposure control for cameras
US3409378A (en) * 1963-12-28 1968-11-05 Nippon Kogaku Kk Multi-element exposure meter
US3479936A (en) * 1966-12-23 1969-11-25 Polaroid Corp Exposure control system
US3442198A (en) * 1966-12-23 1969-05-06 Polaroid Corp Exposure control system
US3511142A (en) * 1967-03-21 1970-05-12 Polaroid Corp Exposure control means
US3504603A (en) * 1967-08-24 1970-04-07 Us Army Automatic exposure control system
US3555987A (en) * 1968-02-07 1971-01-19 Iben Browning Focal plane shutter system
US3521954A (en) * 1968-04-08 1970-07-28 Itek Corp Electro-optic apparatus and method for modifying contrast in photographic images
US4050814A (en) * 1974-12-24 1977-09-27 Rockwell International Corporation Programmable light control matrix device
JPS5212828A (en) * 1975-07-21 1977-01-31 Konishiroku Photo Ind Co Ltd Exposure control process for the object of a non-uniform distribution of brightness

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2173537A5 (fr) * 1972-02-22 1973-10-05 Eastman Kodak Co

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593295A1 (fr) * 1986-01-20 1987-07-24 Cornuejols Georges Controleur electronique matriciel des parametres d'exposition pour appareil de prise de vues
US5051770A (en) * 1986-01-20 1991-09-24 Scanera S.C. Image processing device for controlling the transfer function of an optical system

Also Published As

Publication number Publication date
CA1081518A (fr) 1980-07-15
US4162831A (en) 1979-07-31
GB1591270A (en) 1981-06-17
DE2800051A1 (de) 1978-07-13
JPS6029093B2 (ja) 1985-07-09
FR2376428B1 (fr) 1984-11-02
DE2800051C2 (de) 1986-10-02
JPS53107827A (en) 1978-09-20

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Legal Events

Date Code Title Description
ST Notification of lapse