Blackbody cavity for calibration of infrared thermometers
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United States of America Patent
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-
Sep 10, 2002
Grant Date -
Feb 21, 2002
app pub date -
Oct 17, 2001
filing date -
Nov 2, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A blackbody cavity having two types of wall surfaces wherein a first type has high emissivity and a second type has low emissivity. The low emissivity wall surface has an aperture from where the infrared radiation escapes the cavity, and is preferably shaped to minimize the escape through the aperture of radiation emanated directly from the low emissivity wall itself. The combination of high and low emissivity wall surfaces allows the blackbody to reduce the influence of the environmental temperature while maintaining emissivity approaching unity.
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