Process and apparatus for the measurement of the factor of infra

Details Process and apparatus for the measurement of the factor of infra Process and apparatus for the measurement of the factor of infra

1978-05-22

1980-05-20

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250338, G01T 100

Patent

active

042041201

ABSTRACT:
A method of measuring the absorptivity or emissivity factor of a sample at ambient temperature comprises maintaining a thermopile at a constant temperature substantially above ambient temperature and exposing the sample to radiation exclusively from the thermopile. The voltage across the thermopile is measured and provides a measure of the absorptivity or emissivity factor. The thermopile may be disposed in a temperature-controlled furnace extending into a conical cavity.

REFERENCES:
patent: 3916690 (1975-11-01), Brandli
patent: 4134015 (1979-01-01), Cunningham

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