Method and apparatus for measuring temperature

Details Method and apparatus for measuring temperature Method and apparatus for measuring temperature

1993-01-28

1994-06-21

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

Nonelectrical, nonmagnetic, or nonmechanical temperature...

356 43, 356 44, 356345, 374120, G01K 550, G01K 1100, G01K 1118

Patent

active

053223616

ABSTRACT:
A method and apparatus for measuring temperature by subjecting, to the temperature to be measured, a light-transmissive body of a material whose dimensions change in response to temperature, directing first rays of light from a light source through a first path including a predetermined distance of travel through the light-transmissive body, simultaneously directing second rays of light from the light source through a second path, parallel to the first path and of a linear length equal to that of the first path, but not including the predetermined distance of travel through the light transmissive body, and measuring the change in phases between the first and second light rays at the ends of the first and second paths, to thereby provide a measurement of the temperature to which the light-transmissive body was subjected.

REFERENCES:
patent: 4740081 (1988-04-01), Martens et al.
patent: 4756627 (1988-07-01), Nelson
patent: 5102231 (1992-04-01), Loewenstein et al.
patent: 5221142 (1993-06-01), Snow

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