参数Parameter

单位unit

数据data

焦距公差Focal length tolerance

mm

±1%

直径公差Diameter
  Tolerance

mm

+0.0/-0.1mm

厚度公差Thickness Tolerance

mm

±0.1mm

面型surface accuracy

λ/4

光洁度surface quality

60-40

偏心centration

<3\'

有效孔径clear aperture

>80%

倒边bevelling

&lt;0.2×45°

镀膜coating

Customer
  requirments

材料material

锗Germanium