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Variable-Radius Source Method to Separate Specular Component from Haze Peak



Edward F. Kelley


People in the electronic display industry enjoy simple apparatus configurations in order to characterize reflection properties of displays. Generally, bidirectional-reflectance-distribution-function (BRDF) measurements are not of interest because of the time and expense involved. Thus, simple apparatus is desired to characterize reflection properties, and this is a prevalent disposition within the entire display industry. The method presented here provides a simple arrangement to separate the distinct-image specular component from the peak of the haze component in the BRDF. This is equivalent to measuring the coefficient of the delta function in the ideal BRDF and separating it from the peak of the continuous part of the ideal BRDF. The limitations of the method will be discussed. Although two types of displays do not lend themselves to this analysis, such displays are comparatively rare for commercial displays. Most existing displays can be measured using this technique.
Proceedings Title
Proc. CORM 2005
Conference Dates
May 11-13, 2005
Conference Location
Boulder, CO
Conference Title
Council for Optical Radiation Measurements Conference


BRDF, display reflection measurements, haze component, Lambertian component, specular component, variable-radius source


Kelley, E. (2005), Variable-Radius Source Method to Separate Specular Component from Haze Peak, Proc. CORM 2005, Boulder, CO, [online], (Accessed April 23, 2024)
Created May 11, 2005, Updated January 27, 2020