Abstract

A dual beam bidirectional reflectance attachment, which permits the sample plane to be tilted to plus or minus 45°, is described. No restriction is placed on the type of sample which can be investigated because the incident light impinges on the sample from above. Reflectance spectra of a variety of materials are shown, as well as an indicatrix for a specular and a diffuse reflector. The use of this attachment provides spectra of the kind necessary for interpreting terrestrial and planetary remote sensing data.

© 1967 Optical Society of America

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