Reflective elements and sensors including reflective elements

Details Reflective elements and sensors including reflective elements Reflective elements and sensors including reflective elements

1981-10-30

1984-07-10

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

148 315, 350288, 374144, 356 43, G01J 508

Patent

active

044590431

ABSTRACT:
A radiation pyrometer, or other optical sensor, has a mirror assembly capable of withstanding high temperatures. The mirror assembly is a block of a steel containing between 15 and 20% chromium, 4.0 and 5.2% aluminium, 0.05 and 0.4% yttrium, 0.2 and 0.4% silicon, and 0.00 and 0.03% carbon. A reflective surface on the assembly is provided by an aluminium oxide layer. The assembly is formed by heating a body of the steel such as to produce the aluminium oxide layer which is then polished to a reflective finish. After heating, the body is machined to the desired shape of the mirror assembly.

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