Cylindrical Lens, Plano-Concave, N-BK7, 50.8x19.0mm, -50mm FL, 1000-1550nm

Technical Specs

  • Lens Type
    Cylindrical
  • Lens Shape
    Plano-Concave
  • Size
    50.8 x 19.05 mm
  • Center Thickness (Tc)
    6.0 mm  
  • Edge Thickness (Te)
    7.62 mm  
  • Lens Material
    Grade A N-BK7
  • Antireflection Coating
    1000-1550 nm
  • Coating Code
    AR.18
  • Surface Quality
    40-20 scratch-dig
  • Surface Flatness
    λ/2-λ/4
  • Surface Accuracy, Irregularity, X Axis
    ≤λ/4 per cm
  • Surface Accuracy, Irregularity, Y Axis
    ≤λ/2
  • Effective Focal Length (EFL)
    -50.0 mm  
  • Back Focal Length (BFL)
    -53.96 mm  
  • Thickness
    6.0 mm  
  • Centration
    <3 arc min
  • Principal Plane 2 (P2)
    -3.96 mm  
  • Radius of Curvature (R)
    -25.850 mm  
  • Chamfers
    0.5 mm face width
  • Chamfers Angle/Tolerance
    45°, typical
  • Size Tolerance
    ±0.1 mm
  • Focal Length Tolerance
    ± 2.0%
  • Center Thickness Tolerance
    +0.5/-0.25 mm
  • Edge Thickness Tolerance
    ±0.3 mm
  • Clear Aperture
    ≥central 80% of dimensions
  • Cleaning
  • f/Y
    -2.6
  • Wedge
    <1 mrad in X axis