Optics: measuring and testing – Photometers – Integrating
Patent
1977-07-13
1979-09-18
Hille, Rolf G.
Optics: measuring and testing
Photometers
Integrating
356218, G01J 142
Patent
active
041681240
ABSTRACT:
The invention provides a method and apparatus for measuring and recording the amount of solar energy falling at a place over a given period of time, comprising means for producing a frequency signal representative of the energy falling at the place, the provision of the frequency signal being controlled in response to the level of solar energy falling exceeding a morning threshold and falling below an evening threshold, and the frequency signal being applied to a counter, preferably fitted with print-out means, whereby the counter may record the total energy falling between the morning and evening thresholds.
REFERENCES:
patent: 3617137 (1971-11-01), Meyers
patent: 3843265 (1974-10-01), Egli
patent: 3846028 (1974-11-01), List
patent: 3972626 (1976-08-01), Laskowski
patent: 3999061 (1976-12-01), McLaughlin
R. M. Masters "Solar Energy Meter" NASA, Lewis Research Center, Cleveland, Ohio, #TM-73791, Sep. 1977.
Centre National d'Etudes Spaciales
Hille Rolf G.
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