IR Phase Retarding Mirror (PRM)
2.0 µm ≤ λ ≤ 20.0 µm
Phase Retarding Mirror coatings are designed to produce a specific phase shift between the S and P polarization components of an incident CO2 laser beam. Coatings designed for 0º phase shift maintain the incident polarization state in the reflected beam. Coatings designed for λ/4 (90º) phase shift convert a linearly polarized beam into a circularly polarized beam. Coatings 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: |
10.6 µm |
| Angle of Incidence: |
45º |
| Reflectance: |
R ≥ 98.5% |
Retardation:
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Standard:
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0: 0º ± 6º
λ/8: 45º ± 3º
λ/4: 90º ± 6º |
| Precision: |
0: 0º ± 3º
λ/8: 45º ± 1º
λ/4: 90º ± 3º |
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Phase Retarding Mirror coating sample reflectance curve centered on the CO2 laser wavelength of 10.6 μm. The curve represents a general shape for this coating. RMI will design a custom coating for your application. Please call (303) 664-5000 to discuss your coating requirements.
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