SPECTRA
ELECTRO-OPTICAL INSTRUMENTS AND DEVICES FOR MEASURING RADIANT ENERGY IN SCIENTIFIC, INDUSTRIAL, AND PHOTOGRAPHIC APPLICATIONS-NAMELY, COLOR TEMPERATURE METERS, EXPOSURE METERS, DENSITOMETERS, COLOR DENSITOMETERS, METER TESTING EQUIPMENT, LIGHT FILTERS, VIEWING GLASSES; INSTRUMENTS FOR PHOTOMETRY AND RADIOMETRY-NAMELY, LUMINANCE METERS, RADIANCE METERS, ILLUMINANCE METERS, IRRADIANCE METERS, SPECTRORADIOMETERS, CANDLE-POWER METERS, OPTICAL LENSES, CONTROL CONSOLE UNITS, POWER SUPPLY UNITS, DIS...
Registered · October 6, 1972 · 72437703 ·