Description
H-K9L Glass Windows
H-K9L (N-BK7) has excellent transmittance from visible to near-infrared (350-2000nm). It is a commonly used optical glass for preparing high-quality optical components. When the application does not require the additional advantages of UV fused silica (, it has the good transmittance in the UV range and low thermal expansion coefficient), H-K9L is generally selected. We provide uncoated and coated high-precision windows, and customers can also customize the size and coating.
Material: H-K9L
Diameter Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Clear Aperture: ≥90%
Surface Quality: 40/20(Dimension≤50.8mm),
60/40(Dimension＞50.8mm)
Flatness: λ/4@633nm
Parallelism: ≤1′
Chamfer: 0.2×45°
AR Coating:
* Ravg<0.5% per surface@370-675nm
* Ravg<0.5% per surface@650-1050nm
* Ravg<0.5% per surface@1050-1620nm
* Ravg<1.25% per surface@400-1000nm
* R<0.25% per surface (532nm, 808nm, 1064nm)
