北京石英玻璃開槽打孔片怎么選光學窗口參數(shù) Parameter?標準指標 Standard? ?Grade?中等精度指標 Precision? ?Grade?高精度指標 Ultra-precision? ?Grade? 尺寸公差/Dimensional Tolerance?+/-0.2?+/-0.1?+/-0.05? 通光孔徑/Clear Aperture?>80% to >90%?>80% to >90%?>80% to >90%? 表面質量/Surface Quality?80/50?60/40?40/20? 平行度/Parallelism?3 arc min?1 arc min?30 arc seconds? 波長面形/W<span style="background:red;"> </span>efront Distortion?5λper 25mm?1λper 25mm?λ/4?北京石英玻璃開槽打孔片怎么選