Prediction of BRDFs from surface profile measurements.

摘要

This paper discusses methods of predicting the BDRF of smooth surfaces from profile measurements of their surface finish. The conversion of optical profile data to the BDRF at the same wavelength is essentially independent of scattering models, while the conversion of mechanical measurements, and wavelength scaling in general, are model dependent. Procedures are illustrated for several surfaces, including two from the recent HeNe BRDF round robin, and results are compared with measured data. Reasonable agreement is found except for surfaces which involve significant scattering from isolated surface defects which are poorly sampled in the profile data. 9 refs., 10 figs.