K9 optical window
PRODUCT CATEGORIES
Circle 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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