12.7 x 50.8mm EFL 90° VIS Coated Glass Off-Axis Parabolic Mirror

Product Details High Quality Fused Silica Substrate <10Å Surface Roughness for Low Scatter 90° Offset Angle for Easy Integration TECHSPEC High Performance Fused Silica Off-Axis Parabolic (OAP) Mirrors feature a surface roughness of less than 10Å which is the lowest scatter available in an off-the-shelf solution. Featuring a fused silica substrate, these low scatter alternatives perform better in the UV wavelength range than traditional metallic substrate OAPs. TECHSPEC High Performance Fused Silica Off-Axis Parabolic (OAP) Mirrors are ideal for Schlieren, MTF, and Czerny-Turner and Littrow spectrometer systems due to their low scattering. Note: Uncoated options require a coating for use. Contact us for a custom coating quote for your specific wavelength. Specifications General Type: Off-Axis Parabolic Mirror Physical & Mechanical Properties Diameter (mm): 12.70 +0/-0.10 Clear Aperture (%): 90 Surface Roughness (Å): <10 RMS Y Offset (mm): 50.80 Optical Properties Effective Focal Length EFL (mm): 50.80 Focal Length Tolerance (%): ±1 Parent Focal Length PFL (mm): 25.4 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More UV Fused Silica Coating: VIS Coating Specification: R avg >98% @ 400-750nm (0°-45° AOI for All Polarizations) R avg >99% @ 400-750nm (0°-45° AOI for S-Polarization) Wavelength Range (nm): 400 – 750 Off-Set Angle (°): 90 Surface Figure, RMS: λ/8 @ 632.8nm Surface Quality: 40-20 Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 0.5J/cm², 20ns , 20Hz @ 532nm Reflected Wavefront, RMS: λ/4 @ 632.8nm Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×