Longpass Filter, Colored Glass, 50.8 x 50.8 mm, 725 nm Cut-on, RG9 Glass

Technical Specs

  • Type
    Colored Glass Longpass Filter
  • Optic Size
    50.8 x 50.8 mm
  • Cut-on Wavelength
    725 nm
  • Surface Quality
    60-40 scratch-dig
  • Surface Flatness
    ≤2λ at 632.8 nm over the clear aperture
  • Thickness Tolerance
    ±0.1 mm
  • Size
    50.8 x 50.8 mm
  • Material
    Schott RG9 or equivalent
  • Thickness
    3.0 mm  
  • Size Tolerance
    ±0.3 mm
  • Clear Aperture
    ≥central 80% of dimensions
  • Cut-onCut-off Wavelength
    725 nm  
  • Angle of Incidence
  • Damage Threshold
    30 W/cm2 CW, typical
  • Wedge
    ≤3 arc min
  • Chamfers
    0.25–0.76 mm face width
  • Chamfers Angle Tolerance
    45° ±15°
  • Cleaning
    Non-abrasive method, acetone or isopropyl alcoholon lens tissue recommended
  • Schott Glass Number
    RG.9