Phase Retarding Mirrors
Phase Retarding Mirrors are designed
to produce a specific phase shift between the S and P polarization components
of an incident CO2 laser beam. Mirrors designed for zero phase shift
maintain the incident polarization state in the reflected beam. Mirrors
designed for λ/4 (90º)
phase shift convert a linearly polarized beam into a circularly polarized
beam. Mirrors designed for λ/8 (45º)
phase shift convert a linearly polarized beam into an elliptically polarized
beam.
RMI STANDARD
SPECIFICATIONS
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| Design wavelength: |
10.6µm |
Angle incidence:
|
45º
|
| Materials: |
Si, Cu |
Surface Figure:
|
λ/40 [λ/20]
at 10.6 µm, S1
|
Surface Quality:
|
40-20, S1
Fine grind, S2
|
| Diameter Tolerance: |
+ 0.000", – 0.010" |
| Thickness Tolerance: |
± 0.010" |
| Wedge: |
≤ 3 arc minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter |
| Reflectance: |
R ≥ 98.5% |
| Retardation: |
0: 0º ±
6º
λ/8: 45º ±
3º
λ/4: 90º ±
6º
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Last Updated ( Wednesday, 02 May 2007 )
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