Free-space propagation of the generalized radiance defined in terms of the coherent-mode representation of cross-spectral density function [Review]

摘要

The equation for free-space propagation of the generalized radiance defined formerly by the authors in terms of the coherent-mode representation of the cross-spectral density function is derived within the accuracy of the paraxial approximation. It is shown that, in the short-wavelength limit, this generalized radiance obeys in a good approximation the fundamental radiative transfer law of classical radiometry. [References: 10]