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Publication of DE270103CpublicationCriticalpatent/DE270103C/de
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
G01J1/48—Photometry, e.g. photographic exposure meter using chemical effects
G01J1/50—Photometry, e.g. photographic exposure meter using chemical effects using change in colour of an indicator, e.g. actinometer
Einrichtung zur photographischen Vergrößerung, Verkleinerung und Reproduktion, Projektion, Vorführung von Filmen, Entwickeln von Aufnahmen und Kopien, Trocknen von Kopien und zur Beleuchtung.