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
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Physics & Mathematics
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General Physics & Mathematics
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Spectroscopy & Molecular Physics
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Photometry And Measurement Of Optical Pulse Characteristics
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Montage régulateur de courant à transistor ballast muni d'un transistor accessoire destiné à limiter la puissance moyenne dissipée dans le transistor ballast