光学元件标识升级公告
光学材质：N-BK7
工作波长：350 nm-2.0 µm（未镀膜）
用途：成像、单方向光束准直、光束整形
工作波长：400 nm-700 nm（增透膜）
工作波长：700 nm-1100 nm（增透膜）
工作波长：1100 nm-1650 nm（增透膜）
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