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SHELDON ELECTRIC CORP
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SHELDON ELECTRIC CORP
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Application filed by SHELDON ELECTRIC CORPfiledCriticalSHELDON ELECTRIC CORP
Application grantedgrantedCritical
Publication of FR704408ApublicationCriticalpatent/FR704408A/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
G01J1/10—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
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Physics & Mathematics
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General Physics & Mathematics
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Spectroscopy & Molecular Physics
(AREA)
FR704408D1929-10-281930-10-27Procédé et appareil pour la comparaison des intensités de lumière et les applications analogues
ExpiredFR704408A
(fr)