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We apply coherence-propagation theory to model the radiation generated by a planar passive thermal source of any state of coherence. Of our particular interest is the blackbody calibration source with partially coherent characteristic that produces the radiant intensity with its angular distribution following Lambert’s cosine law in the far field. A closed-form expression of the Poynting vector of...
A passive blackbody target is an indispensable component for some microwave remote-sensing radiometers. The radiation from the blackbody, in addition to the cosmic microwave background, provides calibration references for resolving the unknown brightness temperature of the observed scene. The blackbody target is often placed closer to the radiometer front end than that given by the Fraunhofer distance...
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