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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25.4mm Dia. x 101.6mm EFL, Enhanced Deep UV (DUV) 90° Off-Axis Mirror

Ultraviolet Off-Axis Parabolic (OAP) Mirrors

Stock #25-468 New 3-4 days
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Off-Axis Parabolic Mirror
Diameter (mm):
25.40 +0.0/-0.1
Effective Focal Length EFL (mm):
Focal Length Tolerance (%):
Radius of Curvature (mm):
Enhanced Aluminum (190-900nm)
Coating Type:
Coating Specification:
Ravg ≥92% @ 190 - 250nm
Ravg ≥83% @ 250 - 900nm
Off-Set Angle (°):
Parent Focal Length PFL (mm):
Surface Figure, RMS:
Surface Roughness (Angstroms):
<50 RMS
Wavelength Range (nm):
190 - 900
Surface Quality:
Compatible Mounting Plates:
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Aluminum 6061-T6
Y Offset (mm):
Reflected Wavefront, RMS:

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:

Product Family Description

  • Enhanced Metallic Coating for High Reflectivity Across Deep UV (DUV) and Visible Spectra
  • 190nm Design Wavelength
  • <50Å RMS Surface Roughness

TECHSPEC® Ultraviolet Off-Axis Parabolic (OAP) Mirrors are coated with a DUV Enhanced Aluminum coating for excellent transmission from 190 – 900nm. To minimize scatter, these OAPs feature aluminum substrates and are diamond turned to have a surface roughness of <50Å RMS. Standard imperial diameters are available with multiple focal length options which range from 25.4 – 203mm. TECHSPEC® Ultraviolet Off-Axis Parabolic Mirrors are ideal for use in DUV ellipsometers, DUV Raman spectroscopy, or for general focusing of UV light generated by broadband light sources. To facilitate mounting and system integration, threaded mounting plate #47-111 (sold separately) which attaches to the base of these off-axis parabolic mirrors are available.

Note: The soft coating can be easily damaged by fingerprints and aerosols.