| RMI Standard Specifications |
| Materials: |
BK7, UVFS, FS,
ZnSe, Ge, Chalcogenide glass
|
| Angle of Incidence: |
45º |
Surface Figure:
BK7, UVFS, FS:
ZnSe, Ge, Chalcogenide glass: |
Both Surfaces
λ/20 at 632 nm
λ/40 at 10.6 μm
|
Surface Quality:
BK7, UVFS, FS:
ZnSe, Ge, Chalcogenide glass: |
Both Surfaces
10-5
40-20
|
| Diameter Tolerance: |
+ 0.000", – 0.010" |
| Thickness Tolerance: |
± 0.010" |
| Wedge: |
≤ 3 arc minutes |
| Bevels: |
0.010" - 0.030" at 45° |
| Clear Aperture: |
Central 85% of diameter |
| Reflectance: |
R < 90% ± 3%
R = 90% – 95% ± 2%
R = 96% – 98% ± 1%
R > 98% ± 0.5% |
| Anti-Reflection Coating: |
Unpolarized:
R ≤ 0.5% at 45º
|
|
