Accessories for optical spectrometers

A system for averaging reflectance spectra over non-homogeneous samples, comprising:

• an optical spectrometer;
• a light source;
• and
• an encasement, comprising:
• (i) an inner surface defining a cavity and at least partially enclosing said light source and said optical spectrometer in said cavity, wherein said optical spectrometer is positioned at or near a center of a floor of said inner surface, and wherein said inner surface further comprises walls and a ceiling;
• and
• (ii) an outer surface configured to be in optical communication with a non-homogeneous, optically diffusive sample positioned outside of said cavity;
• wherein said optical spectrometer has a spectrometer light cone having a half angle of at least 30 degrees and said light source has a source light cone having half angle of at least 30 degrees, and
• wherein said field of view and said illumination angle enable spatial averaging of reflectance measurements across a substantial area of said non-homogeneous, optically diffusive sample.