This kind of windows is made from SCHOTT N-BK7 Glass, which has transparent range from 330-2100nm. The BK7 window has good performance over visible and near IR spectrum for most application.
Optical Windows BK7
This kind of windows is made from SCHOTT N-BK7 Glass, which has transparent range from 330-2100nm. The Optical BK7 window has good performance over visible and near IR spectrum for most application. The refractive index is 1.5168 at 587.6nm.
SCHOTT N-BK7 Glass Window Specifications:
| Dimension Tolerance: | +0.0/-0.2mm |
| Thickness Tolerance: | ±0.2mm（General),±0.05(High Precision) |
| Surface Quality: | 60/40（General),10/5(High Precision) |
| Clear Aperture: | ＞90% |
| Flatness: | λ/2@633nm（General),λ/10@633nm (High Precision) |
| Parallelism: | <3 arc min.(General). <3 arc sec.(High Precision) |
| AR Coated: | Uncoated, AR, HR, PR, etc. |
SCHOTT N-BK7 Glass Window Typical Sizes:
| Round Shape:Diameter(mm): | Φ5.0；Φ10.0 ；Φ12.7；Φ15.0；Φ20.0； Φ25.4；Φ30.0；Φ38.1；Φ50.8；Φ76.2 |
| Square Shape:WxH(mm) | 5.0×5.0；10.0×10.0 ；15.0×15.0 ； 20.0×20.0；25.0×25.0；50.0×50.0 |
| Thickness Tolerance: | 0.5；1.0；1.5；2.0；3.0；4.0； 5.0；6.0；8.0；10.0; 50.0 |
BK7 Windows Stock & Custom N-BK7 Optical Windows – Order Online.
The optical BK7 window has good performance over visible and near IR spectrum for most application.
Thin N-BK7 Windows ideal for both weight and size sensitive systemsfor minimal beam distortion and scatter are available at A-Star Optics.
Note for A-Star’s N-BK7 Window:
(1). Custom-made Optical N-BK7 windows at any size from Φ2.0mm to Φ350mm clear aperture are available.
Besides round, N-Bk7 windows at shape of quadrate, triangular, or other polygonal are available.
(2). Thickness from 1.0mm to 50.0 mm is available upon request.
(3). 100% clear aperture is available upon request.
(4). Better bevel is available upon request.
(5). N-BK7 Windows with Anti-Reflective(AR), High-Reflective(HR), Partial-Reflective(PR) coating are available.