Description
B270 Glass Windows
B270 is a low-cost, high-transparency crown glass with transmission characteristics similar to H-K9L. It is suitable for commercial applications that require low-precision thin and light substrates, and is often used as a protective device between two interfaces. We provide uncoated and coated high-precision windows, and customers can also customize the size and coating.
Material: B270
Diameter Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Clear Aperture: ≥90%
Surface Quality: 60/40
Flatness: λ/4@633nm
Parallelism: ≤1′
Chamfer: 0.2×45°
AR Coating:
* Single layer MgF2, Ravg<1.75% per surface@400-700nm
* Ravg<0.5% per surface@370-675nm
* Ravg<0.5% per surface@650-1050nm
* Ravg<0.5% per surface@1050-1620n
* Ravg<1.25% per surface@400-1000nm
* R<0.25% per surface (532nm, 808nm, 1064nm)
