北京開槽打孔拋光片光學窗口參數 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 保護性倒角/Protective Bevel <0.25x45 deg <0.25x45 deg <0.25x45 deg 材料/Material 紫外石英,熔融石英，紅外石英, 高硼硅玻璃，藍寶石玻璃，K9玻璃，B270等。 Synthetic fused Silica, Fused quartz, IR quartz, Borosilicate glass,Sapphire? ?crystal, K9, B270, etc. 形狀/Shape 圓形窗口、方形窗口、三角形窗口、橢圓窗口、等其他異形窗口 Circular, square, triangular, oval, and other shaped windows 尺寸/Dimension 超大窗口、超薄窗口、常規窗口 Large? ?window, Ultra-thin window, Regular size window 精度/Precision 普通耐火窗口、高精密光學窗口 Ordinary? ?refractory window, High precision optical window 鍍膜/Coating 紫外高反膜，增透膜，鍍金，鍍鋁，鍍銀系列