Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1989-10-17
1991-04-30
Cuchlinksi, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374 9, 374128, 374124, 374137, G01J 558, G01J 510, G01K 700
Patent
active
050112953
ABSTRACT:
Method and apparatus for accurately and instantaneously determining the thermodynamic temperature of remote objects by continuous determination of the emissivity, the reflectivity, and optical constants, as well as the apparent or brightness temperature of the sample with a single instrument. The emissivity measurement is preferably made by a complex polarimeter including a laser that generates polarized light, which is reflected from the sample into a detector system. The detector system includes a beamsplitter, polarization analyzers, and four detectors to measure independently the four Stokes vectors of the reflected radiation. The same detectors, or a separate detector in the same instrument, is used to measure brightness temperature. Thus, the instrument is capable of measuring both the change in polarization upon reflection as well as the degree of depolarization and hence diffuseness. This enables correction for surface roughness of the sample and background radiation, which could otherwise introduce errors in temperature measurement.
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Hansen George P.
Hauge Robert H.
Krishnan Shankar
Margrave John L.
Rey Charles A.
Cuchlinksi, Jr. William A.
Gutierrez Diego F. F.
Houston Advanced Research Center
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