Optical temperature sensors

Details Optical temperature sensors Optical temperature sensors

1991-09-09

1993-01-19

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374132, 374135, G01K 1302, G01K 116, G01J 508

Patent

active

051802279

ABSTRACT:
An optical temperature sensor has an outer probe with a sapphire element at its forward end within a stagnation chamber through which hot gas flows and heats a thermally-emissive coating on the element. A lens focusses radiation emitted by the coating onto one end of a fibre-optic cable that extends within the rear of the probe. A gas passage along the probe enables cooling gas to flow from an inlet at the rear end, around the fibre optic cable, lens and through an outlet rearwardly of a transparent thermal barrier which protects the sapphire element from the cooling gas.

REFERENCES:
patent: 2798893 (1957-07-01), Winkler
patent: 4444516 (1984-04-01), Dostoomian et al.
patent: 4452538 (1984-06-01), Reger et al.
patent: 4737038 (1988-04-01), Dostoomian

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