最終更新日:2025/11/21
(optics) 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.
音声機能が動作しない場合はこちらをご確認ください
正解を見る
optical flat
編集履歴(0)