FR57462E - Posemètre photo-électrique - Google Patents

Posemètre photo-électrique

Info

Publication number
FR57462E
FR57462E FR57462DA FR57462E FR 57462 E FR57462 E FR 57462E FR 57462D A FR57462D A FR 57462DA FR 57462 E FR57462 E FR 57462E
Authority
FR
France
Prior art keywords
light meter
photoelectric light
photoelectric
meter
light
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
Other languages
English (en)
Inventor
Paul Poirette
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 filed Critical
Application granted granted Critical
Publication of FR57462E publication Critical patent/FR57462E/fr
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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR57462D 1947-07-23 1947-07-23 Posemètre photo-électrique Expired FR57462E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR57462T 1947-07-23

Publications (1)

Publication Number Publication Date
FR57462E true FR57462E (fr) 1953-01-28

Family

ID=8691511

Family Applications (1)

Application Number Title Priority Date Filing Date
FR57462D Expired FR57462E (fr) 1947-07-23 1947-07-23 Posemètre photo-électrique

Country Status (1)

Country Link
FR (1) FR57462E (fr)

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