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.
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Specifications:
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Material: Silicon (Si) Single Crystal
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OFHC Copper
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Diameter Tolerances: +.000" -.005"
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Thickness Tolerances: ±.010"
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Surface Figure: 1/40 wavelength@ 10.6 μm
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Parallelism: < 3 arc minutes
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Surface Quality: < 10/5 scratch dig Laser Finish
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Spectral Performance:
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Phase Shift: 90° ± 3.0° between p and s polarization for 10.6μm operation only @ 45° Angle Of Incidence
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Reflectance: > 99.0% average @ 10.6μm
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Absorption: < .18% @ 10.6μm
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Coating optimized to create 90° phase shift from a linear polarized beam.
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Used in beam delivery systems where cutting circles in materials is required.
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P/N
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Substrate
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Dia(inch)
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Edge Thickness(inch)
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Coating
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PRR-0712-90
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Si/ Cu
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0.750''
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0.120''
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90° phase shift
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PRR-1012-90
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Si/ Cu
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1.000''
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0.120''
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90° phase shift
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PRR-1112-90
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Si/ Cu
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1.100''
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0.120''
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90° phase shift
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PRR-4035-90
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Si/ Cu
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4.000''
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0.350''
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90° phase shift
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PRR-38-6-90
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Si/ Cu
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38mm
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6mm
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90° phase shift
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PRR-38-8-90
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Si/ Cu
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38mm
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8mm
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90° phase shift
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PRR-38-10-90
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Si/ Cu
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38mm
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10mm
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90° phase shift
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PRR-1516-90
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Si/ Cu
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1.500''
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0.160''
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90° phase shift
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PRR-1520-90
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Si/ Cu
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1.500''
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0.200''
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90° phase shift
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PRR-1525-90
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Si/ Cu
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1.500''
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0.250''
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90° phase shift
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PRR-1538-90
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Si/ Cu
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1.500''
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0.375''
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90° phase shift
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PRR-1539-90
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Cu
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1.500''
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0.394"
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90° phase shift
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PRR-1579-90-WC
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Cu
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1.500''
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0.787"
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90° phase shift
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PRR-1816-90
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Si/ Cu
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1.750''
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0.160''
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90° phase shift
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PRR-50-5-90
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Si/ Cu
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50mm
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5mm
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90° phase shift
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PRR-2020-90
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Si/ Cu
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2.000''
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0.200''
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90° phase shift
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PRR-50-10-90
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Si/ Cu
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50mm
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10mm
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90° phase shift
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PRR-50-25-90-WC
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Cu
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50mm
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25mm
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90° phase shift
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PRR-2038-90
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Si/ Cu
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2.000''
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0.375''
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90° phase shift
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PRR-57.15-10-90
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Si/ Cu
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57.15mm
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10mm
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90° phase shift
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PRR-57.15-31.75-90-WC
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Cu
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57.15mm
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31.75mm
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90° phase shift
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PRR-60-10-90
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Si/ Cu
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60mm
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10mm
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90° phase shift
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PRR-60-15-90
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Si/ Cu
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60mm
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15mm
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90° phase shift
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PRR-60-25-90-WC
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Cu
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60mm
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25mm
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90° phase shift
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PRR-63.5-10-90
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Si/ Cu
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63.5mm
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10mm
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90° phase shift
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PRR-2525-90
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Si/ Cu
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2.500''
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0.250''
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90° phase shift
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PRR-68-20-90
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Si/ Cu
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68mm
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20mm
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90° phase shift
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PRR-68-34-90-WC
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Cu
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68mm
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34mm
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90° phase shift
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PRR-70-25-90-WC
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Cu
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70mm
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25mm
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90° phase shift
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PRR-75-25-90-WC
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Cu
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75mm
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25mm
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90° phase shift
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PRR-75-15-90
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Si/ Cu
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75mm
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15mm
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90° phase shift
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PRR-76.2-15-90
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Cu
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76.2mm
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15mm
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90° phase shift
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PRR-3025-90
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Si/ Cu
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3.000''
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0.250''
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90° phase shift
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PRR-3050-90
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Cu
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3.000''
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0.500''
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90° phase shift
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★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
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