High-resolution BSDF/BRDF-measurement and evaluation finally made affordable !
 

During SID 2004 Conference in Seattle DM&S has introduced a then novel approach for measurement and evaluation of display scattering. The BSDF-Meter, the implementation of this method, is now available from DM&S for simple and effective measurement and evaluation of light scattering in general (bidirectional scattering distribution function, BSDF) and for application to electronic displays specifically.

The method is based on the measurement of the lateral distribution of reflected luminance with an imaging detector. After numerical transformation of the measured luminance distribution we obtain the characteristics of the BRDF/BSDF of the sample with high directional resolution within a limited range of inclination angles centered about the specular direction. Due to the absence of moving parts the method exhibits only little sensitivity with respect to variations of the geometry parameters and is thus very robust.

In 2024 the method has been extended to cover all angles of light incidence up to and above 80° ("Display Reflectance Measurements Finally Made Simple, Comprehensive and Affordable", SID 2024 Digest, Paper 74.1, pp. 1007-1010). 

BSDF-Meter, a novel approach for measuring high-resolution BSDF/BRDF.