型号 lo-dmr 材质 n-k9l 技术要求: 材料: ..........................................................................光学玻璃 外径公差: .............................................................+0.0, -0.2mm 厚度公差: ..................................................................± 0.1mm 有效孔径: .........................................................................>90% 光洁度: ............................................................................40 -20 面形: .................................................................λ/4, @632.8nm 平行度: ............................................................................±30/ 尺寸(φ) : ......................................................2.0mm至 100mm 镀膜: ......................................................r>99.8%, r=(+rp)/2