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Modification of the Beckman Model DU Spectrophotometer for the Measurement of Interference Filters

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Abstract

The source-input system of the Beckman Model DU Spectrophotometer is altered to permit the insertion of a two-inch square interference filter into a collimated beam. The over-all spectral transmission of a 1.6-inch square can be determined.

© 1955 Optical Society of America

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