K9材料的窗口在330nm-2100nm 的波段范围内有较高的透过率， 该窗口镀上增透膜后，透过率可以在99.5%以上。

产品参数：

材料：K9

尺寸容差：+0.0/-0.15mm

表面：λ/4 @632.8nm

光洁度：40-20

中心偏差：<3 arc min

通光孔径：>90%

倒边：0.25mm×45°

Part Number	Diameter(mm)	Thickness(mm)
LOWB6-2	6.00	2.00
LOWB10-3	10.00	3.00
LOWB12.7-3	12.70	3.00
LOWB12.7-5	12.70	5.00
LOWB15-3	15.00	3.00
LOWB15-5	15.00	5.00
LOWB20-3	20.00	3.00
LOWB20-5	20.00	5.00
LOWB25.4-3	25.40	3.00
LOWB25.4-5	25.40	5.00
LOWB30-3	30.00	3.00
LOWB30-5	30.00	5.00
LOWB38.1-3	38.10	3.00
LOWB38.1-5	38.10	5.00
LOWB40-5	40.00	5.00
LOWB40-8	40.00	8.00
LOWB50.8-5	50.80	5.00
LOWB50.8-8	50.80	8.00
LOWB75-5	75.00	5.00
LOWB75-10	75.00	10.00
LOWB100-10	100.00	10.00
LOWB100-12	100.00	12.00
LOWB150-20	150.00	20.00
LOWBS4-2	4.00*4.00	2.00
LOWBS5-2	5.00*5.00	2.00
LOWBS6-3	6.00*6.00	3.00
LOWBS12.7-3	12.70*12.70	3.00
LOWBS15-3	15.00*15.00	3.00
LOWBS20-3	20.00*20.00	3.00
LOWBS25.4-3	25.40*25.40	3.00
LOWBS30-5	30.00*30.00	5.00
LOWBS38.1-5	38.10*38.10	5.00
LOWBS40-5	40.00*40.00	5.00
LOWBS50.8-8	50.80*50.80	8.00
LOWBS75-8	75.00*75.00	8.00
LOWBS100-12	100.00*100.00	12.00