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Evaluation of Absolute Reflectance for Standardization Purposes

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Abstract

Details and principles of a technique for reflectance standardization through determination of absolute reflectance are presented. The method involves the use of a demountable, split test sphere whose single port can be presented to the specimen aperture of a spectrophotometer. Measurement of the apparent reflectance of the sphere port permits determination of the spectral absolute reflectance of the test sphere lining; the split sphere is arranged so that the result can be translated to the determination of reflectance of reference and working standards.

© 1966 Optical Society of America

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