| 摘要 |
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.
|
