技術(shù)指標(biāo)材料:............................................................................光學(xué)玻璃外徑公差:...............................................................+0.0,-0.2mm厚度公差:.................................................................... 0.1mm有效孔徑:.......................................................................... 90%光潔度:..............................................................................40-20面形:................................................................... /4,@632.8nm平行度:.............................................................................. 30