Plano-Convex Lens, N-BK7, 12.0 mm Diameter, 20 mm EFL, 400-700 nm

  • Lens Shape
    Plano-Convex
  • Diameter
    12.0 mm
  • Lens Material
    N-BK7
  • Antireflection Coating
    400-700 nm
  • Coating Type
    Visible Single-Layer MgF2
  • Coating Code
    -C
  • Damage Threshold
    7 J/cm², 10 ns pulses, 20 Hz at 532 nm
  • Surface Quality
    60-40 scratch-dig
  • Surface Flatness
    λ/4
  • F/#
    1.7  
  • Effective Focal Length (EFL)
    20.0 mm  
  • Back Focal Length (BFL)
    17.40 mm  
  • Radius of Curvature (R)
    10.374 mm  
  • Edge Thickness (Te)
    2.0 mm  
  • Center Thickness (Tc)
    3.90 mm  
  • Principal Plane 2 (P2)
    -2.60 mm  
  • Centration
    ≤3 arc min
  • Clear Aperture
    ≥central 90% of diameter
  • Cleaning