Method for providing a white color upon illumination of a fluorescent object with ultraviolet light
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United States of America Patent
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Oct 21, 1997
Grant Date -
N/A
app pub date -
Oct 30, 1995
filing date -
Apr 29, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for compensating color when illuminating fluorescent objects by means of one or more illuminating lamps which emit a significant amount of ultraviolet light, particularly when illuminating flags hoisted on flag poles, wherein the objects include ultralight fluorescent material and have a white or a light color when illuminated with visible light. The object is provided with an additional fluorescent material which when illuminated fluoresces in a color that together with a weak blue color provides a white or essentially white color by additive color mixture, the blue color being derived by illumination of the object with ultraviolet light.
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