Transmission method to determine and control the temperature of

Details Transmission method to determine and control the temperature of Transmission method to determine and control the temperature of

1990-09-20

1992-12-08

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219494, 219502, 21912143, 374123, H05B 102

Patent

active

051700417

ABSTRACT:
A method of accurately determining the temperature of a thin layer of bandgap material without requiring contact to the layer involves the use of optical radiation through the layer and the detection of optical absorption by the layer. The relationship between the temperature varying bandgap energy and the resulting optical absorption characteristics provides an indication of temperature independent of ambient temperature. Apparatus for performing high quality temperature detection and control is also provided.

REFERENCES:
patent: 3664942 (1972-05-01), Havas et al.
patent: 4180722 (1979-12-01), Clewans
patent: 4238672 (1980-12-01), Siess
patent: 4363957 (1982-12-01), Tachikawa et al.
patent: 4708677 (1987-11-01), Blank et al.
patent: 4873415 (1989-10-01), Ma et al.
patent: 4948958 (1990-08-01), Sweeney

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