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Технические характеристики

  • Lens Shape Plano-Convex
  • Diameter 25.4 mm
  • Lens Material UV Fused Silica
  • Antireflection Coating Uncoated
  • Surface Quality 20-10 scratch-dig
  • Surface Flatness λ/2
  • Surface Accuracy, Irregularity λ/8
  • Surface Accuracy, Power 1.5 λ
  • F/# 13.8
  • Effective Focal Length (EFL) 350 mm
  • Back Focal Length (BFL) 347.60 mm
  • Radius of Curvature (R) 160.445 mm
  • Edge Thickness (Te) 3.0 mm
  • Center Thickness (Tc) 3.500 mm
  • Principal Plane 2 (P2) -2.40 mm
  • Design Wavelength 589 nm
  • Centration ≤3 arc min
  • Chamfers 0–0.8 mm face width
  • Chamfers Angle/Tolerance 45° ±15°, typical
  • Focal Length Tolerance ±1%
  • Diameter Tolerance +0/-0.1 mm
  • Center Thickness Tolerance ±0.1 mm
  • Clear Aperture ≥central 90% of diameter
  • Cleaning See How to Clean Optics
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