Windows are widely used on optical systems,which are applied to isolate optical system and environment while allowing the light to pass.The material of windows must be considered first,for different material with different transmission range.Also other specifications must be considered with certain environment.

Material:BK7 grade A optical glass
 Dimension Tolerance: +0.0,-0.1mm
 Thickness Tolerance: ±0.1mm
 Parallelism:30 arc seconds—1 arc min
 Surface Quality:10/5 — 60/40
 Surface Flatness:λ/10 — λ/2
 Clear Aperture:>85% of diameter
 Bevel:<0.25mm x 45°
 Coating:Specified by customer