Achromatic Doublet Lens, Visible, 25.4 mm, 125 mm EFL, 400-700 nm

  • Lens Type
    Achromatic Doublet
  • Diameter
    25.4 mm
  • Antireflection Coating
    400-700 nm
  • Coating Type
    Visible Single-Layer MgF2
  • Damage Threshold
    1.0 J/cm2 @ 1064 nm, 10 ns , 10 Hz
  • Transmission
    T>95%
  • Lens Material
    N-BK7/N-SF5
  • Surface Quality
    40-20 scratch-dig
  • Surface Accuracy, Irregularity
    λ/4
  • Surface Accuracy, Power
    1.5 λ  
  • Effective Focal Length (EFL)
    125 mm
  • Back Focal Length (BFL)
    121.9 mm  
  • F/#
    4.9  
  • Radius of Curvature (R)
    75.785 mm  
  • Radius 2
    -56.058 mm
  • Radius 3
    -167.954 mm
  • Edge Thickness (Te)
    4.9 mm  
  • Center Thickness (Tc)
    6.467 mm  
  • Thickness, Center 1
    4.3 mm  
  • Thickness, Center 2
    2.167 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