Patent ID: 9528932
Filing Date: 2016-12-27
CPC Classification: G01N

Claim Text:
1. A light integrating cavity device (LICD) for measurement of diffuse light reflectance of a sample, the LICD comprising: a shell enclosing a light scattering cavity (LSC) defined by an internal light scattering surface of the shell; a light source disposed for illuminating the internal light scattering surface of the shell for creating scattered light within the LSC for illuminating the sample therewith, wherein the shell has an aperture for allowing light out of the light scattering cavity for illuminating the sample when the sample is positioned at the aperture outside of the LSC, or for illuminating a light measurement device (LMD) with the scattered light reflected from the sample or transmitted through the sample when the LMD is positioned outside of the LSC facing the aperture; a light trap mounted within the LSC and positionable in a specular optical alignment with the sample and the LMD so as to prevent the LMD from receiving specular reflections from the sample; and a light trap arm movably mounted within the LSC for supporting the light trap and for moving the light trap in and out of a position of the specular optical alignment with the sample and the LMD, so as to allow the diffuse light reflectance of the sample to be measured by the LMD with the specular component of the reflectance included and with the specular component of the reflectance excluded.