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MARIE-LEON GODEFROY
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MARIE-LEON GODEFROY
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Application filed by MARIE-LEON GODEFROYfiledCriticalMARIE-LEON GODEFROY
Application grantedgrantedCritical
Publication of FR21235EpublicationCriticalpatent/FR21235E/fr
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
G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
G01J1/40—Photometry, e.g. photographic exposure meter using wholly visual means using limit or visibility or extinction effect
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Spectroscopy & Molecular Physics
(AREA)
FR21235A1919-02-261919-02-26Photomètre destiné à la mesure des temps de pose en photographie
ExpiredFR21235E
(fr)