Abstract

Conventional ray-tracing methods fail for non-Lambertian sources. To address this deficiency, we introduce a radiometric ray-tracing (R2T) method, applicable to quasi-homogeneous sources of arbitrary spatial coherence. Based on Fourier optics, applied to physical radiometry in the radiance transfer function second-order approximation, the R2T method retains the standard ray-tracing codes but modifies them to include phase-space weighting factors attached to conventional geometric rays.

© 1996 Optical Society of America

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