These mirrors are generally used as last mirror prior to focusing lens.They create a 90° Phase Shift with the aid of specially constructed thin film coating layers applied to the surface, when hit with a linear polarized beam at 45° to the plane of incidence. Commonly called Phase Shifters, Polarizers, or Circular Polarizing Mirrors, they transform the incoming beam into a circular polarized state. They typically are only used external to the laser cavity as a beam delivery mirror. These operate only with a true 10.6μm laser wavelength and will not work at other wavelengths such as 9.3μm or 9.6μm without special modifications to the thin film coating design. We offer non-standard wavelength Phase Retardation Reflectors at these other wavelengths as custom parts.
| Specifications: |
| Material: Silicon (Si) Single Crystal |
| OFHC Copper |
| Diameter Tolerances: +.000" -.005" |
| Thickness Tolerances: ±.010" |
| Surface Figure: 1/40 wavelength@ 10.6 μm |
| Parallelism: < 3 arc minutes |
| Surface Quality: < 10/5 scratch dig Laser Finish |
|
| Spectral Performance: |
| Phase Shift: 90° ± 3.0° between p and s polarization for 10.6μm operation only @ 45° Angle Of Incidence |
| Reflectance: > 99.0% average @ 10.6μm |
| Absorption: < .18% @ 10.6μm |
| Coating optimized to create 90° phase shift from a linear polarized beam. |
| Used in beam delivery systems where cutting circles in materials is required. |
| P/N | Substrate | Dia(inch) | Edge Thickness(inch) | Coating |
| PRR-0712-90 | Si/ Cu | 0.750'' | 0.120'' | 90° phase shift |
| PRR-1012-90 | Si/ Cu | 1.000'' | 0.120'' | 90° phase shift |
| PRR-1112-90 | Si/ Cu | 1.100'' | 0.120'' | 90° phase shift |
| PRR-4035-90 | Si/ Cu | 4.000'' | 0.350'' | 90° phase shift |
| PRR-38-6-90 | Si/ Cu | 38mm | 6mm | 90° phase shift |
| PRR-38-8-90 | Si/ Cu | 38mm | 8mm | 90° phase shift |
| PRR-38-10-90 | Si/ Cu | 38mm | 10mm | 90° phase shift |
| PRR-1516-90 | Si/ Cu | 1.500'' | 0.160'' | 90° phase shift |
| PRR-1520-90 | Si/ Cu | 1.500'' | 0.200'' | 90° phase shift |
| PRR-1525-90 | Si/ Cu | 1.500'' | 0.250'' | 90° phase shift |
| PRR-1538-90 | Si/ Cu | 1.500'' | 0.375'' | 90° phase shift |
| PRR-1539-90 | Cu | 1.500'' | 0.394" | 90° phase shift |
| PRR-1579-90-WC | Cu | 1.500'' | 0.787" | 90° phase shift |
| PRR-1816-90 | Si/ Cu | 1.750'' | 0.160'' | 90° phase shift |
| PRR-50-5-90 | Si/ Cu | 50mm | 5mm | 90° phase shift |
| PRR-2020-90 | Si/ Cu | 2.000'' | 0.200'' | 90° phase shift |
| PRR-50-10-90 | Si/ Cu | 50mm | 10mm | 90° phase shift |
| PRR-50-25-90-WC | Cu | 50mm | 25mm | 90° phase shift |
| PRR-2038-90 | Si/ Cu | 2.000'' | 0.375'' | 90° phase shift |
| PRR-57.15-10-90 | Si/ Cu | 57.15mm | 10mm | 90° phase shift |
| PRR-57.15-31.75-90-WC | Cu | 57.15mm | 31.75mm | 90° phase shift |
| PRR-60-10-90 | Si/ Cu | 60mm | 10mm | 90° phase shift |
| PRR-60-15-90 | Si/ Cu | 60mm | 15mm | 90° phase shift |
| PRR-60-25-90-WC | Cu | 60mm | 25mm | 90° phase shift |
| PRR-63.5-10-90 | Si/ Cu | 63.5mm | 10mm | 90° phase shift |
| PRR-2525-90 | Si/ Cu | 2.500'' | 0.250'' | 90° phase shift |
| PRR-68-20-90 | Si/ Cu | 68mm | 20mm | 90° phase shift |
| PRR-68-34-90-WC | Cu | 68mm | 34mm | 90° phase shift |
| PRR-70-25-90-WC | Cu | 70mm | 25mm | 90° phase shift |
| PRR-75-25-90-WC | Cu | 75mm | 25mm | 90° phase shift |
| PRR-75-15-90 | Si/ Cu | 75mm | 15mm | 90° phase shift |
| PRR-76.2-15-90 | Cu | 76.2mm | 15mm | 90° phase shift |
| PRR-3025-90 | Si/ Cu | 3.000'' | 0.250'' | 90° phase shift |
| PRR-3050-90 | Cu | 3.000'' | 0.500'' | 90° phase shift |
★Except for Si and Cu, we can also provide mirror of other base materials like Al,Ni,Brass and Mo
★Reflective beam expander or mirror with curvature are available as customer requires
★Repaire service is available; MaxR: high reflective dielectric film, R can be above 99.8%
★The above are about standard products,they can also be custom made |
