GB822023A - Improvements in photo-electric exposure meters - Google Patents

Improvements in photo-electric exposure meters

Info

Publication number
GB822023A
GB822023A GB3842/56A GB384256A GB822023A GB 822023 A GB822023 A GB 822023A GB 3842/56 A GB3842/56 A GB 3842/56A GB 384256 A GB384256 A GB 384256A GB 822023 A GB822023 A GB 822023A
Authority
GB
United Kingdom
Prior art keywords
photo
exposure meters
electric exposure
film speed
exposure
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
GB3842/56A
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.)
Sangamo Weston Ltd
Atos Origin IT Services Inc
Original Assignee
Sangamo Weston Ltd
Sangamo Weston Inc
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 Sangamo Weston Ltd, Sangamo Weston Inc filed Critical Sangamo Weston Ltd
Publication of GB822023A publication Critical patent/GB822023A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
    • G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Cameras Adapted For Combination With Other Photographic Or Optical Apparatuses (AREA)

Abstract

822,023. Exposure meters. SANGAMO WESTON Ltd. Feb. 7, 1956 [March 22, 1955], No. 3842/56. Drawings to Specification. Class 98(1) [Also in Group XL(b)] A disc adjustably obscuring the photocell of an exposure meter is calibrated in film speed and the moving-coil meter pointer moves over a scale graduated to represent the product of film speed and scene brightness. Figs 1 and 2 (not shown)
GB3842/56A 1955-03-22 1956-02-07 Improvements in photo-electric exposure meters Expired GB822023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US822023XA 1955-03-22 1955-03-22

Publications (1)

Publication Number Publication Date
GB822023A true GB822023A (en) 1959-10-21

Family

ID=22169698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3842/56A Expired GB822023A (en) 1955-03-22 1956-02-07 Improvements in photo-electric exposure meters

Country Status (1)

Country Link
GB (1) GB822023A (en)

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