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Generalized radiance of uniform Lambertian sources

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Abstract

The generalized radiance function is calculated for uniform Lambertian sources. In particular, the radiance for a few simple-shaped sources is given explicitly when the wavelength of the radiating field is small compared with the size of the source. It is shown that the classical radiometric description of Lambertian sources is just the zeroth-order small-wavelength approximation of the generalized radiance. The first-order corrections to generalized radiance are calculated for half-plane and strip-shaped sources. The physical implications of these results are discussed.

© 1988 Optical Society of America

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