Abstract

Theory and general design data for a two-dimensional slide-action alignment chart giving a direct reading of the Planck distribution function are presented. Accuracy and convenient size are complementary; a “pocket” model covering 200 to 10 000 deg K yields one or two place accuracy in spectral density.

© 1956 Optical Society of America

A Slide Rule for Lighting Calculations

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Dark Adaptation as a Function of the Intensity and Distribution of Light across the Preadaptation Field

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