Industrial colorimeter having light intensity compensation means

Details Industrial colorimeter having light intensity compensation means Industrial colorimeter having light intensity compensation means

1990-06-14

1992-01-21

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

364526, G01J 342

Patent

active

050823701

ABSTRACT:
A colorimeter provides compensation for changes in the color signature of an object due to lamp aging, stand off distance and view angle changes. The colorimeter senses and stores values indicative of a sample object. In use, the colorimeter senses and creates values indicative of an object. The colorimeter includes a processor which then creates an average ratio wherein the stored values and corresponding sensed values are placed in a ratio, all of the ratios are then summed, and the total is divided by the number of values. Finally, the processor compares the sensed values with corresponding stored values, wherein one of the two values is adjusted by the average ratio.

REFERENCES:
patent: 4076421 (1978-02-01), Kishner
patent: 4449821 (1984-05-01), Lee

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