Radiant energy – Invisible radiation responsive nonelectric signalling – Optical change type
Patent
1994-01-05
1995-01-03
Dzierzynski, Paul
Radiant energy
Invisible radiation responsive nonelectric signalling
Optical change type
250372, G01J 150
Patent
active
053788966
ABSTRACT:
A harmful solar radiation detection apparatus includes a first fluorescent composition comprised of a blend of a first fluorescent material and a second fluorescent material contained in a first retainer. The first fluorescent material is capable of absorbing radiation having a wavelength less than 300 nm and is capable of fluorescing at a first fluorescent wavelength above 300 nm upon absorption of the radiation less than 300 nm. The second fluorescent material is capable of absorbing radiation at the first fluorescent wavelength and is capable of fluorescing at a second fluorescent wavelength which is a visible wavelength. A second fluorescent composition is comprised of the second fluorescent material and is contained in a second retainer. A housing assembly supports and houses the first retainer and the second retainer such that the first fluorescent composition and the second fluorescent composition are capable of being exposed to sunlight. A first filter may be placed between sunlight and the first fluorescent composition, and a second filter may be placed between sunlight and the second fluorescent composition. The first and second filters filter out wavelengths above 300 nm. A viewing window is defined by the housing assembly and permits a viewer to view and compare colors of the first fluorescent composition and the second fluorescent composition upon exposure to sunlight. The sunlight-exposed first fluorescent composition serves as an indicator of exposure to harmful solar radiation; and the sunlight-exposed second fluorescent composition serves as a control.
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Delpalma, Mark S. "Multi-Color Ultraviolet Radiation Measurement Device", WO 89/06347, 13 Jul. 1994.
Knjaschewitsch Sascha R.
Petch David A.
Dunn Drew A.
Dzierzynski Paul
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