Color mismatch accentuating device

Details Color mismatch accentuating device Color mismatch accentuating device

1975-04-29

1976-06-15

Mullins, James B.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313227, 313486, H01J 6304

Patent

active

039639533

ABSTRACT:
A device to generate light of a quality which will accent the mismatch in color appearance of objects having different spectral reflectance curves but which appear at least generally similar in color and lightness under illumination by daylight. As there are many objects which match under one illuminant such as daylight, but do not match under other illuminants, there are many applications in which it is desirable to provide for early detection of potential mismatches. This invention generates visible radiation substantially confined to at least two of the 405-435 nm, 475-505 nm, 565-595 nm, and 645-675 nm wavelength ranges, and which preferably has less than 20 percent of the radiations in the 435-465 nm, 525-555 nm and 595-625 nm wavelength ranges.

REFERENCES:
patent: 3875453 (1975-04-01), Thornton

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