Abstract

A formula is derived that describes the size of the solid angle within which must be the normal to a flat specular reflector, if such a reflector is to redirect light from a small but finite extended source to a small but finite extended detector. The formula assumes the rules of geometrical optics and does not account for the effects of diffraction.

© 1987 Optical Society of America

Radiometric coherence tensors for thermal radiation emission from an opaque specular surface

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