1, the visible and near-infrared light plane window (sapphire, quartz, K9, etc.)
Planar optical window used in visible and near-infrared optical communications, optoelectronics, sensors, etc. The main products are flat sapphire optical window, quartz windows, BK7optical glass window.
Plane sapphire optical window main specifications areF 2.5 ×0.28、F 2.9 × 0.28、F 3.5 × 0.28、F 4.0 ×0.28、4.5 × 0.28 etc.
Can be customized according to customer requirements.

规格型号Specification	材料Material	外型尺寸Dimensions（mm）	光学有效口径optically effective  diameter（mm）	金属化区域metalized area（mm）	光谱指标spectral Specification
F2.5×0.28	蓝宝石/ sapphire	F2.5	F1.6	≥1.8	1250~1650nm, T≥99%
F2.9×0.28	蓝宝石/ sapphire	F2.9	F1.6	≥1.8
F3.5×0.28	蓝宝石/ sapphire	F3.5	F2.2	≥2.4
F4.0×0.28	蓝宝石/ sapphire	F4.0	F2.8	≥3.0
F4.5×0.28	蓝宝石sapphire /	F4.5	F3.2	≥3.4