ZnSe Lens

Shanghai Optics’ Zinc Selenide lenses provide diffraction limited focusing performance. Ideal for focusing the output of a CO2 laser, the lenses are offered uncoated, providing excellent performance over a broad spectral range of 0.6µm to 18.0µm.
Shanghai Optics offers ZnSe meniscus, ZnSe Spherical and Cylindrical lenses. For custom sizes or configurations, please contact our sales engineer.
Factory Standard – Contact us for manufacturing limit or custom specifications.

  • Substrate Material: ZnSe
  • Shape: Spherical Plano-Concave, P-Convex, Concave-Convex or Aspheric
  • Surface Figure: λ/20 before coating at 10.6μm
  • Surface Quality: 40-20 per MIL-PRF-13830B
  • Dimensional Tolerance: + 0.00mm, – 0.25mm
  • Thickness Tolerance: +/- 0.25mm
  • Chamfer: 0.35mm at 45° typical
  • Concentricity: < 0.05mm
  • Focal Length Tolerance: +/- 2%
  • Antireflection Coating: Ravg < 0.6% per surface at 3-5μm
    Ravg < 0.75% per surface at 8-12μm
    Ravg < 0.5% per surface at 10.6μm
  • Clear Aperture: Exceeds central 85% of dimension
  • Absorption: <0.3% total absorption as measured by CO2 laser calorimetry
  • Design Wavelength: 10.6μm


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