An alternating-current bolometer system has been developed for detecting and recording radiant energy in infra-red spectroscopy. Almost constant use over a ten-months’ period dictates certain improvements which are pointed out. The useful sensitivity is limited now by fluctuations originating in the power supply to the bolometer bridge.
C. H. SCHLESMAN and FRANK G. -BROCKMAN, "Alternating-Current Bolometer for Infra-Red Spectroscopy," J. Opt. Soc. Am. 35, 755-759 (1945)