E903 lists types of equipment that can be used to measure reflectance, but that list excludes certain optical configurations that are fully capable of performing the measurements. This revision is meant to make the standard more inclusive of the various legitimate methods of performing the measurement. To do this, well conduct an Inter-Laboratory Study that will both enable us to learn what level of performance users of the standard can expect and also portray to what extent alternative optical configurations can produce similar results.
Keywordsabsorptance; diffuse; integrating sphere; reflectance; smooth; solar absorptance; solar reflectance; solar transmittance; spectral; spectrophotometer; specular; texture; transmittance;
Draft Under Development