NEW GONIOPHOTOMETERS FOR LIGHTING-ENGINEERING LABORATORIES, WHICH ARE ALSO USEFUL FOR ACCURATE PHOTOMETRY OF HIGH-PRESSURE SODIUM-XENON LAMPS WITH PULSED CURRENT SUPPLY

摘要

A new goniophotometer with an eccentric rotating mirror, a goniophotometer with cardanic mounted frames and a new digital luxmeter with the additional feature of measuring the luminance with a special luminance-tube are described. Light sources with a high luminous flux crest-factor (up to a value of about 15!) can be measured correctly.