AT271941B - Photowiderstandsschaltung für Belichtungsmeßanordnungen - Google Patents

Photowiderstandsschaltung für Belichtungsmeßanordnungen

Info

Publication number
AT271941B
AT271941B AT773167A AT773167A AT271941B AT 271941 B AT271941 B AT 271941B AT 773167 A AT773167 A AT 773167A AT 773167 A AT773167 A AT 773167A AT 271941 B AT271941 B AT 271941B
Authority
AT
Austria
Prior art keywords
photoresistive
circuit
exposure meters
meters
exposure
Prior art date
Application number
AT773167A
Other languages
English (en)
Inventor
Helmut Ing Schmitt
Original Assignee
Gossen & Co Gmbh P
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 Gossen & Co Gmbh P filed Critical Gossen & Co Gmbh P
Application granted granted Critical
Publication of AT271941B publication Critical patent/AT271941B/de

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
    • G03B7/083—Analogue circuits for control of exposure time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
    • 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)
  • Spectroscopy & Molecular Physics (AREA)
  • Exposure Control For Cameras (AREA)
AT773167A 1966-08-24 1967-08-23 Photowiderstandsschaltung für Belichtungsmeßanordnungen AT271941B (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG0047741 1966-08-24
DEG0050749 1967-07-27

Publications (1)

Publication Number Publication Date
AT271941B true AT271941B (de) 1969-06-25

Family

ID=25978835

Family Applications (1)

Application Number Title Priority Date Filing Date
AT773167A AT271941B (de) 1966-08-24 1967-08-23 Photowiderstandsschaltung für Belichtungsmeßanordnungen

Country Status (2)

Country Link
US (1) US3528350A (de)
AT (1) AT271941B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES377232A1 (es) * 1969-02-26 1972-06-01 Nippon Kogaku Kk Dispositivo automatico de control de tiempo de exposicion para camaras.
US3690229A (en) * 1969-05-30 1972-09-12 Kofaru Itabashiku Kk Exposure control apparatus for photographic cameras
US3715608A (en) * 1970-09-23 1973-02-06 Teletype Corp Programmable circuit and method
JPS4945204Y1 (de) * 1970-12-21 1974-12-11
US3781680A (en) * 1971-11-16 1973-12-25 Us Air Force Differential method of photocurrent measurement
JPS5442704Y2 (de) * 1972-04-14 1979-12-11
US3842423A (en) * 1973-10-17 1974-10-15 Eastman Kodak Co Exposure control apparatus
US3860936A (en) * 1974-01-28 1975-01-14 Eastman Kodak Co Shutter control circuit for controlling exposure time under low light conditions
US4117325A (en) * 1975-08-22 1978-09-26 Ernst Leitz Wetzlar Gmbh Optical objective focus indicator and display
JPS5296023A (en) * 1976-02-09 1977-08-12 Fuji Photo Optical Co Ltd Single lens reflex camera
US4128760A (en) * 1977-04-07 1978-12-05 Ncr Corporation Ambient light compensating circuit
GB2200507B (en) * 1987-01-28 1992-02-12 Famous Instr Ltd Optical detector for an auto-focus camera

Also Published As

Publication number Publication date
US3528350A (en) 1970-09-15

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