LB4738-B UV Fused Silica Bi-Convex Lens; Dia:6 mm; f=20.0 mm ARC 650-1050nm

The LB4738-B is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This lens is specifically crafted from UV Fused Silica, a material known for its exceptional transparency across a broad spectrum, including the ultraviolet range. The lens boasts a diameter of 6 mm and a focal length of 20.0 mm, making it suitable for a wide range of applications.

The lens features an Anti-Reflection coating (ARC) on both surfaces, specifically designed for the 650-1050nm wavelength range. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and improving overall system efficiency. The front and back surfaces of the lens are coated with the same ARC, ensuring consistent performance across the entire lens.

The lens's geometry is another notable feature. It has a thickness of 1.5 mm at the edge and 2.0 mm at the center, providing robustness and stability. The lens's front and back radii of curvature are 18.1 mm and -18.1 mm, respectively, resulting in a back focal length of 19.3 mm. The lens's shape is spherical, which is a common and versatile lens shape in many optical systems.