Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1976-12-10
1977-12-13
Dixon, Harold A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250350, 250352, G01J 100
Patent
active
040630951
ABSTRACT:
A balancing radiometer for measuring the intensity of incident electromagnetic radiation comprises: a pair of identical sensors, each including a thermally conductive substrate, at least one surface of the substrate being comprised of an electrically insulating material, and means disposed on the one surface for resisting the flow of electric current and absorbing incident radiation; means for shielding one of the two sensors from the radiation source, the other sensor being unshielded; means disposed in thermal conducting relation with the substrate of the shielded sensor for providing a first signal proportional to the temperature of the shielded sensor; second means disposed in thermal conducting relation with the substrate of the unshielded sensor for providing a second signal proportional to the temperature of the unshielded sensor; means for comparing the first and second signals; variable power supply means responsive to the signal comparing means; means for connecting the power supply means to the shielded sensor for heating the shielded sensor to a temperature equal to the temperature of the unshielded sensor; and means for measuring the power output of said power supply means.
REFERENCES:
patent: 3487216 (1969-12-01), Webb
patent: 3564252 (1971-02-01), Stoft
patent: 3604933 (1971-09-01), Cross
patent: 3619614 (1977-11-01), Tamaka
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