Abstract

A comparison is given, in terms of D*, of the characteristics of most of the photodetectors of both quantum and thermal types, which are available for operational use at the near and intermediate infrared. A discussion of detectors for use at longer wavelengths (up to the mm range) includes two quantum types as well as the cooled bolometers and the pneumatic cell. The review of thermal detectors emphasizes noise limitations as well as spectral characteristics. The need for gray body detectors for use in spectral response measurements is discussed. It is pointed out that a complete noise power spectrum is essential in order to evaluate effectively a detector and determine the operational limitations.

© 1962 Optical Society of America

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