A Zinc Selenide (ZnSe) Plano-Concave Lens features one flat and one inward-curved surface engineered to diverge incident infrared light, extend focal lengths, and expand high-power laser beams with exceptional wavefront clarity. Fabricated from premium CVD laser-grade substrate material and optimized for a 10.6 µm design wavelength, these negative lenses deliver low bulk absorption and high transmission across the infrared spectrum. Available in both uncoated configurations and high-efficiency IR2 anti-reflection coatings (Ravg < 1.5% @ 8–12 µm), our lenses are precision-manufactured with a strict surface quality of 60-40 and an EFL tolerance of ±1%.

Applications of Our ZnSe Plano-Concave Lens:

  • CO2 Laser Beam Expansion: Functions as a highly efficient diverging element in Galilean beam expander configurations for high-power 10.6 µm CO2 laser cutting, engraving, and marking systems.
  • Laser Beam Shaping & Aberration Correction: Serves as a precision diverging lens to balance spherical aberrations and optimize laser beam profiles in advanced industrial and medical optical paths.
  • Optical System Integration: Acts as a high-performance negative lens to extend focal lengths, control collimated beam diameters, and minimize power density on downstream optical components.
  • Infrared Thermal Imaging & FLIR: Works as a critical optical component to manipulate fields of view and balance optical paths in thermal imaging cameras and FLIR sensing systems operating across the 8–12 µm LWIR bands.


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