optical flat

名词 n.
中文释义

英文释义

名词 n.
  1. A disk of high-quality quartz glass having at least one side ground and polished with a deviation in flatness less than 50 nanometers all over, and a surface quality of 5 microfinish or less; used, in an interferometer, to measure the flatness of other surfaces.

词形变化

optical flats plural
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