ZnSe lens is a good material for CO2 laser cutting and engraving machine, We select excellent material from USA, High transmission and high quality surface roughness. With high quality, we produce ZnSe plano convex lens, ZnSe plano concave lens, ZnSe meniscus lens, Znse ball lens, and custom size ZnSe.
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♥Substrate Material: Znse
♥Shape： Spherical Plano-Concave,P-Convex,Concave-Convex or Aspheric
♥Surface Figure： λ/20 before coating at 10.6μm
♥Surface Quality： 20-10
♥Dimensional Tolerance： +/-0.02mm
♥Thickness Tolerance： +/-0.02mm
♥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