The plano-convex lenses from LBTEK feature one convex surface and one flat surface, providing positive focal lengths typically used for beam reduction, focal length shortening, or imaging magnification applications. To minimize spherical aberration, when a plano-convex lens is used for focusing a collimated beam, the beam should be incident on the curved surface; when collimating a point source, the beam should be incident on the flat surface. The CaF₂ plano-convex lenses from LBTEK are coated with 2.0–5.0 μm AR coating on both surface to reduce the reflectivity of the lens. LBTEK utilizes CaF₂ for manufacturing various lenses due to its exceptional transmission across ultraviolet and infrared spectra, combined with high laser damage threshold, making it particularly suitable for excimer laser applications. With a relatively low refractive index ranging between 1.35 and 1.51 over the 180 nm to 8.0 µm spectral range, CaF₂ demonstrates superior chemical inertness compared to similar materials like BaF₂ and MgF₂. Its notable hardness and broad spectral performance establish CaF₂ as an ideal optical material for UV and IR wavelength lens applications. All lenses undergo precision machining and strict quality control, ensuring LBTEK delivers high-quality optical products at competitive prices.