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first surface mirror中文是什么意思

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用"first surface mirror"造句"first surface mirror"怎么读"first surface mirror" in a sentence

中文翻译手机手机版

  • 表面镀膜镜
  • 第一表面反射镜
  • 外表面镀膜反射镜

百科解释

A first surface mirror or front surface mirror (also commonly abbreviated FS mirror) is a mirror with the reflective surface being above a backing, as opposed to the conventional, second surface mirror with the reflective surface behind a transparent substrate such as glass or acrylic. In cases where the mirror is subjected to extreme cold (as low as 33 K as in the James Webb Space Telescope), a polished pure beryllium mirror is used without a first surface coating in order to obviate buckling caused by differing coefficients of thermal expansion.
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