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A General Formula for The Computation Of Colorimetric Purity

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Abstract

The formula for purity is called general because if the trilinear coordinates of any color referred to any given set of primary color processes and any basic stimulus be given, the colorimetric purity of its stimulus may be computed with respect to any heterogeneous stimulus as the fixed stimulus of homo-heterogeneous analysis. The derivation of the formula is given and five special cases of historical and practical interest are worked out in order to demonstrate that previous formulas for the computation of colorimetric purity and an allied ratio are special cases of this one. The connection is also given between colorimetric purity and the allied ratio variously known as saturation, saturation fraction, and Sättigung.

© 1931 Optical Society of America

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Equations (42)

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