Bichromatic pyrometer
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United States of America Patent
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Apr 16, 1996
Grant Date -
N/A
app pub date -
Mar 30, 1994
filing date -
Apr 1, 1993
priority date (Note) -
Expired
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Abstract
A bichromatic pyrometer for detecting the high temperature of a surface element of an object comprises two photodiodes (18, 19) receiving radiation from the object, each of the photodiodes having a large forbidden band and being sensitive to radiation in a given range of wavelengths, said sensitivity ranges being different and being situated in the visible or near visible regions of the spectrum, said ranges being obtained by selecting the value of the forbidden band of the material constituting each of the photodiodes (18) and (19), said forbidden band being greater than or equal to that of silicon (.gtoreq.1.11 eV). The pyrometer is capable of measuring rapidly changing surface temperatures with great accuracy.
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