... Lenses to meet various application requirements. Spherical Lens types include Fused Silica and other optical glasses, Plano-Convex, Plano-Concave, Bi ... Bi-Concave, meniscus, achromats, and lens sets .Applied in: display system, projection system, laser measurement, optical imaging, light control, and others ... quality40-20ETV≤0.002apertureN=1Part apertureΔN=0.3coatingAR @10.6um ≤0.2% ZnSe(USA) focus ...