Product Details

Circular/Square BK7 Optical Glass Protective windows

BK7 is a high quality optical glass that is used whenever the additional benefits of fused silica are not required. Since BK7 performs well in all chemical tests, and no additional or special handling is required, costs of manufacturing are reduced.

It is a relatively hard material with extremely low bubble and inclusion content, while providing excellent transmittance through-out the visible and near infrared spectra and down to 350 nm in the ultraviolet.

The material can be Schott, or CDGM optical glass serious. They are low distortion, low scatter, and could be for laser and non-laser applications.

Material are available for BK7,JGS1,Sapphire,CaF2,MgF2,BaF2,other material as customer need.

Technical Specifications:

Material	BK7,Fused Silica,Sapphire,CaF2,BaF2,MgF2,Silicon,Znse,Ge as customer request
Dimension	5-300mm circular or square
Dimension Tolerance	+/-0.15mm, +/-0.2mm, +0/-0.1mm as request
Parallelism	3 arc minute(standard);10 arc second (high precision)
Surface Quality	10/5,20/10,60/40,40/20,80/50 as request
Flatness	lambda/4 per 25nm at 632.8nm
Type	Circular.Square,Wedge,Customized
Edge	0.2mm*45degree,others are available upon customer request
Coating	Anti-Reflective (AR) Coatings,Single layer MgF2 coating,Multilayer Broadband AR Coating