FR1156397A - Light meter - Google Patents

Light meter

Info

Publication number
FR1156397A
FR1156397A FR1156397DA FR1156397A FR 1156397 A FR1156397 A FR 1156397A FR 1156397D A FR1156397D A FR 1156397DA FR 1156397 A FR1156397 A FR 1156397A
Authority
FR
France
Prior art keywords
light meter
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
French (fr)
Inventor
Jean-Eugene-Gabriel Petit
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 FR1156397A publication Critical patent/FR1156397A/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)
FR1156397D 1956-07-17 1956-07-17 Light meter Expired FR1156397A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1156397T 1956-07-17

Publications (1)

Publication Number Publication Date
FR1156397A true FR1156397A (en) 1958-05-14

Family

ID=9649950

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1156397D Expired FR1156397A (en) 1956-07-17 1956-07-17 Light meter

Country Status (1)

Country Link
FR (1) FR1156397A (en)

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