FIELD: infrared equipment. SUBSTANCE: photometer has lens 1, mirror shutter 2, first and second photodetectors 3, 4, first and second diaphragms 5, 8, collimator 6, radiation source 7, adder 9, two preamplifiers 10, 11, two-mirror level hold elements 12, 13, computation-and-registration unit 10. EFFECT: increased accuracy of radiation measurement. 3 dwg
Authors
Dates
1994-01-30—Published
1990-10-22—Filed