Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1992-02-19
1994-07-19
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
250365, 2504611, G01J 502
Patent
active
053311680
ABSTRACT:
A low-cost, reference grade pyranometer responsive to radiation in a band such as ultraviolet-B embodies unexpected and efficient construction. Large arrays or other multisensor systems are consequently available to a greater range of users. A dome constructed of UV-transmissive material has mounted therein a UV-pass "black glass" filter which transmits UV-B to a phosphor layer. The phosphor absorbs UV-B and re-emits it as predominantly green visible light. A green filter, which is "solar blind," i.e. non-transmissive to reds in the solar spectrum, transmits light to a solid state photodiode. The solid state photodiode has peak sensitivity in the green portion of the spectrum and rejects substantially all red leakage. Critical parameters such as the density and thickness of the phosphor and temperature compensation of the pyranometer combine to provide for a simplified pyranometer having great precision in measuring bands such as UV-B compared to the prior art.
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Beaubien Arthur F.
Beaubien David J.
Glick Edward J.
Hannaher Constantine
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