Brewster Windows (BW)
Brewster’s Angle
- Laser quality polish on both sides, uncoated
Brewster windows are used for large angles of incidence so that they present a circular cross section to the incoming beam at the Brewster’s angle. These windows are polished to a laser grade finish on both sides. Please contact the Lambda’s sales team for more coating information.
Surface Flatness: |
If thickness ≤ 1.5mm : λ/4 @ 633nm
If thickness > 1.5mm : λ/10 @ 633nm |
Surface Quality: |
<10/5 (both sides) |
Wedge: |
<3 arc min |
Diameter Tolerance: |
<+ 0.00 / – 0.20 mm |
Thickness Tolerance: |
<± 0.25 mm |
Clear Aperture: |
>85% of diameter |
Bevel: |
0.3 mm (typical) x 45°Brewster Window |