材    料 ：BK7光学玻璃, CaF2 , BaF2 ,
                                          Ge , Si ,Fused Silica
                               直径公差 :+0.0/-0.02mm
                               厚度公差 : ± 0.01mm
                               表面精度 : λ/4 @632.8nm
                               表面质量 : 20-10
                               偏    心 : 1'
                               通光孔径 : > 90%
                               倒    角 : 0.2×45°
                               镀    膜 : 依据定制要求