反射镜（圆形&方形）
反射镜规格说明如下：
*材料:BK7 A glass, 石英, CaF2,晶体或其他
*通光孔径:90%
*正方/矩形:1mm to110mm+/-0.2mm
*中心厚度公差:+/-0.1mm
*光洁度:60-40 to 20/10
*面型:lambda/10 at 632.8nm
*平行度:1弧分
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