LB4821-C UV Fused Silica Bi-Convex Lens; Dia:2 in; f=100.0 mm ARC 1050-1700nm

The LB4821-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 2 inches (50.8 mm) and a focal length of 100.0 mm, making it suitable for a wide range of optical applications.

The lens is made of UV fused silica, a material known for its excellent optical properties, including high transparency across a broad spectrum (1050-1700 nm), low auto-fluorescence, and high resistance to thermal shock and chemical etching. The base shape of the lens is circular, and it features a spherical geometry with radii of curvature of 90.4 mm for the first surface and -90.4 mm for the second surface.

The LB4821-C comes with a broadband anti-reflection coating, applied to both the front and back surfaces. This coating, designated as "tho c bbar," is designed to reduce surface reflections and increase transmission across the lens's operational wavelength range. The lens has a central thickness of 10.3 mm and an edge thickness of 3 mm, providing excellent optical performance and durability.