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
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