Multi-wavelength optical thermometry

Details Multi-wavelength optical thermometry Multi-wavelength optical thermometry

1992-09-25

1993-11-23

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

Nonelectrical, nonmagnetic, or nonmechanical temperature...

374120, 356 45, 356346, 356360, G01K 1100, G01J 3427, G01J 345

Patent

active

052637760

ABSTRACT:
Multi-wavelength optical thermometry provides for non-contact measurement of the temperature of a sample where the front surface and the back surface of the sample are used in a interferometer to measure changes in optical path length. Laser beams at two different wavelengths are used and the beam phase of the two resultant interference signals is used to unambiguously measure the path length change over a broad temperature range.

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