K9 optical window

K9 optical window

 

 

  • Square BK7 (K9) window can be seen from the transmittance of near-infrared (350-2000nm). It is a common optical glass for preparing optical elements. When the additional advantages of UV fused quartz (good transmittance and low coefficient of thermal expansion in UV band) are not required, H-K9L will generally be selected.

Technical parameters
Items Parameters
Material optical glass, H-K9L (N-BK7)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-300mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 8 (high precision, we can process to 1 / 10λ)
Surface quality 40/20 (we can process to 10-5 with high precision)
Effective caliber ≥90%
Coating multilayer antireflective film A:350-650nm B:650-1050nm C:1050-1580nm
spectral curve

In addition, We can customize the optical window according to customer requirements or drawings.

For details, please consult:

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