Lenses project solar image onto aperature to exclude circumsolar radiation, more precisely measuring energy captured by receiver aperatures of highly-concentrating solar thermal-energy converters. First version uses achromatic objective lens to form image of Sun at aperature ahead of radiometer cavity. Smaller second version with shorter focal length forms image magnified by another lens and thrown onto aperature. Both Versions require calibration against standard radiometer.
Field limiter for solar radiometers
NASA Tech Briefs ; 5 , 4
1981-04-01
Miscellaneous
No indication
English
Tema Archive | 1976
|Understanding Microwave Radiometers
NTRS | 1986
|Eos cross-calibration radiometers
NTRS | 1992
|Airborne air temperature radiometers
SPIE | 1999
|