US PATENT SUBCLASS 374 / 126
.~.~.~ Having emissivity compensating or specified radiating surface

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
120  DF  .~ In spaced noncontact relationship to specimen {3}
121  DF  .~.~ By thermally emitted radiation {11}
126.~.~.~ Having emissivity compensating or specified radiating surface

DEFINITION

Classification: 374/126

Having emissivity compensating or specified radiating surface:

(under subclass 121) Subject matter including an arrangement to provide, or to compensate for departure from, a fourth power dependence of the emitted radiation on the absolute temperature, or from the amount of radiation emitted by a completely black surface with an emissivity of one.

(1) Note. Included herein are blackened surfaces or cavities contacting the material the temperature of which is being measured.