Color measuring spectrophotometer

Details Color measuring spectrophotometer Color measuring spectrophotometer

1973-04-24

1976-01-27

Wise, Edward J.

Registers

Transfer mechanism

Traveling pawl

444 1, 356244, 356 96, 356177, G06F 1520, G01J 300

Patent

active

039354369

ABSTRACT:
A digital, abridged spectrophotometer with a detecting head defining a roughly spherical, reflective inner surface broken by a viewing port and a light source port with a number of filtered photodiodes mounted in the head for each receiving light from a sample or standard in the viewing port. A standard sheet of vitrolite is mounted on the housing for movement with a plunger, which trips a switch, to cover the viewing port, while a standard black sheet can be pivoted to cover the viewing port for the calibration which precedes each reading. A digital computer calculates the tristimulus values from the signals produced by the photodiodes and provides signals for a display of the color values.

REFERENCES:
patent: 3531208 (1970-09-01), Ward
patent: 3601589 (1971-08-01), McCarty
patent: 3672780 (1972-06-01), Piringer
patent: 3791745 (1974-02-01), MacHenry
Preparation and Mounting Textile Samples for Color Measurement, W. L. Matthews, Jr., American Dyestuff Reporter, July 29, 1968, pp. 30-36.

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