New Negative Achromatic Doublet Lens, Visible, 25 mm, -50 mm EFL, 400-700 nm

  • Lens Type
    Negative Achromatic Doublet
  • Lens Shape
    Bi-Concave
  • Diameter
    25 mm
  • Antireflection Coating
    400-700 nm
  • Coating Type
    Visible Single-Layer MgF2 (Ravg≤1.75% )
  • Lens Material
    N-BAF10/N-SF10
  • Surface Quality
    40-20 scratch-dig
  • Surface Accuracy, Irregularity
    λ/4
  • Surface Accuracy, Power
    1.5 λ
  • Effective Focal Length (EFL)
    -50 mm
  • Back Focal Length (BFL)
    -53.33 mm
  • F/#
    2
  • Radius of Curvature (R)
    -35.51 mm
  • Radius 2
    24.58 mm
  • Radius 3
    217.99 mm
  • Edge Thickness (Te)
    9.06 mm
  • Center Thickness (Tc)
    6.56 mm
  • Design Wavelengths
    587.6 nm
  • Centration
    <1 arc min
  • Diameter Tolerance
    +0/-0.025 mm
  • Focal Length Tolerance
    ±2%
  • Center Thickness Tolerance
    ±0.2 mm
  • Clear Aperture
    24 mm