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Negative Meniscus Lens, Fused Silica, 50.8 mm, -500 mm EFL, 355 nm

Technical Specs

  • Lens Shape
    Negative Meniscus
  • Diameter
    50.8
  • Lens Material
    UV Grade Fused Silica
  • Antireflection Coating
    355 nm
  • Effective Focal Length (EFL)
    -500.0
  • Surface Quality
    20-10 scratch-dig
  • Surface Accuracy, Irregularity
    1/8 λ
  • Surface Accuracy, Power
    1.5
  • Back Focal Length (BFL)
    -498.82
  • F/#
    9.8
  • Centration
    ≤3 arc min
  • Chamfers
    0–0.8 mm face width
  • Chamfers Angle/Tolerance
    45° ±15°, typical
  • Diameter Tolerance
    +0/-0.1 mm
  • Focal Length Tolerance
    ±1%
  • Center Thickness (Tc)
    3.0
  • Center Thickness Tolerance
    ±0.1 mm
  • Edge Thickness (Te)
    4.422
  • Clear Aperture
    ≥central 90% of diameter
  • Coating Type
    Laser Line V-Coat
  • Coating Code
    HAR.13
  • Cleaning
    Non-abrasive method, acetone or isopropyl alcoholon lens tissue recommended