LB4915-C UV Fused Silica Bi-Convex Lens; Dia:0.5 in; f=50.0 mm ARC 1050-1700nm

The LB4915-C is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This lens, with a diameter of 0.5 inches and a focal length of 50.0 mm, is a spherical lens that boasts a base shape of a circle, ensuring a wide range of applications.

The lens is made of UV Fused Silica, a material with the material ID "uvfs mal- 1965". This material is known for its excellent transmittance and durability, making it an ideal choice for various optical applications. The lens has a central thickness of 2.7 mm and an edge thickness of 1.8 mm, providing a robust structure that can withstand handling and use in various environments.

The LB4915-C lens features an effective focal length (EFL) of 50 mm, which is the distance from the lens's center to the principal focal point. This EFL, combined with the lens's diameter and thickness, results in a back focal length (BFL) of 49.1 mm. The lens's radii of curvature are 45.6 mm for the first surface and -45.6 mm for the second surface, contributing to its high-quality optical performance.

This lens is coated with a broadband anti-reflection coating, ARC 1050-1700nm, on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission across the 1050-1700nm wavelength range.