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Achromatic Lens, NIR, 6.0 mm Diameter, 20.0 mm EFL, 750-1550 nm

Specifications

  • Lens Type
    Achromatic Doublet
  • Lens Shape
    Plano-Convex
  • Diameter
    6.0 mm
  • Antireflection Coating
    750-1550 nm
  • Coating Type
    NIR Multilayer
  • Coating Code
    AR.16E
  • Damage Threshold
    1.0 J/cm2 @ 1064 nm, 10 ns , 10 Hz
  • Lens Material
    N-LaK22/N-SF6
  • Surface Quality
    40-20 scratch-dig
  • Surface Accuracy, Irregularity
    λ/4
  • Surface Accuracy, Power
    1.5λ
  • Effective Focal Length (EFL)
    20 mm
  • Back Focal Length (BFL)
    17.27 mm
  • F/#
    3.3
  • Radius of Curvature (R)
    11.29 mm
  • Radius 2
    -10.63 mm
  • Radius 3
    -134.80 mm
  • Edge Thickness (T<sub>e</sub>)
    3.86 mm
  • Center Thickness (T<sub>c</sub>)
    4.30 mm
  • Thickness, Center 1
    3.00 mm
  • Thickness, Center 2
    1.30 mm
  • Design Wavelengths
    880 nm
  • Centration
    3-5 arcmin
  • Chamfers
    0.25 mm
  • Chamfers Angle/Tolerance
    45°
  • Diameter Tolerance
    +0.0/-0.1 mm
  • Focal Length Tolerance
    ±2.0%
  • Center Thickness Tolerance
    ± 0.2 mm
  • Clear Aperture
    ≥90% of diameter