An Illuminant-Converting Filter for Use with the Automatic Tristimulus Integrator

Abstract
If a suitable filter is placed in the sample beam of the recording spectrophotometer, the automatic tristimulus integrator may be used for calculations based on illuminants other than Illuminant C without a change in the cams. Instructions for making a filter for use in calculating tristimulus values based on an illuminant approximating Illuminant A are given.

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