Colorimeter instrument with fiber optic ring illuminator

Details Colorimeter instrument with fiber optic ring illuminator Colorimeter instrument with fiber optic ring illuminator

1982-05-27

1984-08-07

Evans, F. L.

Optics: measuring and testing

By shade or color

Trichromatic examination

250227, 356416, 356446, G01J 350

Patent

active

044640544

ABSTRACT:
In a colorimetry system, the test surface, the color of which is to be measured, is illuminated by a fiber optic cable. Light transmitting ends of the optic fibers of the fiber optic cable are uniformly distributed into an annulus with the transmitting ends of the optic fibers pointed inwardly at 45 degrees toward the axis of the annulus. A light pipe, or a second fiber optic cable, is positioned to have one end on the axis of the annulus to receive diffusely reflected light from the test surface and transmit the reflected light to photodetectors through different color filters. The output signals of the photodetectors are applied to the colorimetry console which converts the photodetector signals to standard color index values.

REFERENCES:
patent: 3463595 (1969-08-01), Blanc et al.
patent: 3473878 (1969-10-01), Schweitzer
patent: 3500054 (1970-03-01), Lasalle et al.
patent: 3707030 (1972-12-01), Hunter et al.
patent: 3806256 (1974-04-01), Ishak
patent: 4076421 (1978-02-01), Kishner
patent: 4240751 (1980-12-01), Linnecke et al.

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