Heat Absorbing Glass Filter, 25.4 mm Diameter, IR Cut-off, KG-3 Glass

  • Type
    Heat Absorbing Filter
  • Material
    Schott KG3 or equivalent
  • Center Wavelength
    VIS
  • Angle of Incidence
  • Size
    Ø25.4 mm
  • Size Tolerance
    ±0.3 mm
  • Thickness
    2.0 to 3.0 mm, typical
  • Surface Flatness
    ≤1λ at 632.8 nm over the clear aperture
  • Surface Quality
    60-40 scratch-dig
  • Damage Threshold
    30 W/cm2 CW, Typical
  • Wedge
    ≤3 arc min
  • Clear Aperture
    central ≥ 80% of diameter
  • Chamfers
    Up to 1 mm face width
  • Chamfers Angle Tolerance
    45° ±15°
  • Cleaning