材料.......................................................Mgf2 尺寸公差..................................................±0.1 定向精度................................................. 0.2° 平面度....................................................λ/4波前畸變..................................................λ/8 @632.8nm平行度....................................................< 30″ 有效孔徑..................................................> 90%光潔度.....................................................20-10 崩邊.......................................................< 0.02mm