Scanning Gonio-Photometers for Asymmetric Acquisition of Fine-structured BSDF

Abstract

Results of building and running out-of-plane scanning gonio-photometers for a number of years and projects are presented. Key concepts are a fast drive system and adaptive scan pattern to sample peaks at higher angular resolution. It is suggested to scan the BSDF asymmetrically, at a finer angular resolution for the outgoing directions than the incident directions.