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Publication of FR477264ApublicationCriticalpatent/FR477264A/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
G01J1/02—Details
G01J1/08—Arrangements of light sources specially adapted for photometry standard sources, also using luminescent or radioactive material
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FR477264D1914-06-061914-06-06Lampe étalon à flamme d'acétylène ou autre gaz éclairant
ExpiredFR477264A
(fr)