Abstract
The purpose of this paper is to compare the theoretical spectral detectivity (Dλ*) of a low-impedance photoconductive detector with a high-impedance photoconductive detector at low background temperatures. This theoretical prediction assumes that both detectors are limited only by photon noise and Johnson noise. Examples of infrared detectors that have these ultimate limits are mercury cadmium telluride (HgxCd1−xTe) and mercury-doped germanium (Ge:Hg).
© 1970 Optical Society of America
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