Abstract
A description is given of an integrating-sphere-type instrument for measuring
volume reflectance and volume transmittance of a thin plane-parallel slab of
gelatin having scattering particles embedded within it when uniformly diffuse
radiation is incident on the slab. Fresnel surface reflections are eliminated by
immersing the slab of gelatin in a liquid matching the refractive index of
gelatin. The liquid consists of a mixture of 73% bromobenzene and
27% Nujol Extra Heavy Mineral Oil. The theory of the instrument is
outlined.
© 1965 Optical Society of America
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