LB4854-C UV Fused Silica Bi-Convex Lens; Dia:0.5 in; f=20.0 mm ARC 1050-1700nm

The LB4854-C is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This lens boasts a diameter of 0.5 inches and a focal length of 20.0 mm, making it a versatile choice for a wide range of optical applications.

The lens is made from UV fused silica, a material known for its excellent optical properties, including high transparency across a broad spectrum, from 1050 to 1700 nm. This makes the LB4854-C particularly suitable for use in UV and near-IR applications.

The lens features an antireflection coating (ARC) on both the front and back surfaces. This coating is designed to reduce surface reflections, thereby improving transmission and enhancing the overall performance of the lens. The coating is optimized for the 1050-1700 nm wavelength range, further enhancing its performance in these applications.

The geometry of the lens is carefully designed to ensure optimal performance. It has a center thickness of 4.2 mm and edge thickness of 1.8 mm, providing excellent mechanical stability. The lens surfaces have radii of curvature of 17.7 mm and -17.7 mm, resulting in a back focal length of 18.5 mm.