Ultrafast Mirror, FemtoOptics, 25.4 mm, 3.5° AOI, HR 267 nm

Technical Specs

  • Wavelength Region
    UV
  • Wavelength Range
    257-277 nm
  • Diameter
    25.4 mm
  • Material
    N-BK7
  • Coating Code
    UF.HR20
  • Surface Quality
    10-5 scratch-dig
  • Surface Flatness
    λ/10 at 632.8 nm
  • Wedge
    < 5 arcminutes
  • Angle of Incidence
    3.5°
  • Clear Aperture
    ≥ central 85% of diameter
  • Back Surface
    Commercial Polished
  • Reflectivity
    R>99% @ 257-277 nm
  • Thickness
    6.35 mm
  • Thickness Tolerance
    ±0.1 mm
  • Diameter Tolerance
    +0/-0.1 mm
  • Cleaning
    Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended