Achromatic Doublet Lens, Visible, 25.4 mm, 76.2 mm EFL, 400-700 nm

Technical Specs

  • Lens Type
    Achromatic Doublet
  • Lens Shape
    Plano-Convex
  • Diameter
    25.4 mm
  • Antireflection Coating
    400-700 nm
  • Damage Threshold
    750 W/cm2 CW, 0.75 J/cm2 with 10 nsec pulses, typical, cement limitation
  • Transmission
    T>95% visible, T>92% at 1064 nm
  • Lens Material
    N-BaK4/N-SF10
  • Surface Quality
    40-20 scratch-dig
  • Surface Flatness
    λ/4
  • Surface Accuracy, Power
    1.5 λ  
  • Effective Focal Length (EFL)
    76.2 mm
  • Back Focal Length (BFL)
    72.4 mm  
  • F/#
    3  
  • Radius of Curvature (R)
    48.834 mm  
  • Radius 2
    -37.152 mm
  • Radius 3
    -123.853 mm
  • Edge Thickness (Te)
    5.2 mm  
  • Center Thickness (Tc)
    7.5 mm  
  • Thickness, Center 1
    5.5 mm  
  • Thickness, Center 2
    2.0 mm  
  • Orientation
    Steepest convex surface should face the infinite conjugate
  • Design Wavelengths
    589 nm
  • Centration
    ≤3 arc min
  • Diameter Tolerance
    +0/-0.1 mm
  • Focal Length Tolerance
    ±2.0%
  • Center Thickness Tolerance
    ±0.2 mm
  • Cleaning