LB1909-A N-BK7 Bi-Convex Lens; Dia:2 in; f=500.0 mm ARC 350-700nm

The LB1909-A is a high-quality bi-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is fabricated from N-BK7 Schott glass, a popular material known for its excellent optical properties and versatility.

The lens features a diameter of 2 inches (50.8 mm) and a focal length of 500.0 mm, making it suitable for applications that require a long focal length. The bi-convex design, with radii of curvature of 514.4 mm for the first surface and -514.4 mm for the second, ensures a high level of optical performance.

The lens has a central thickness of 4.3 mm and an edge thickness of 3 mm, providing robustness and durability. The lens is coated with a broadband anti-reflection coating, designed to operate between 350-700 nm, which reduces surface reflections and increases transmission.

This lens is a great choice for users looking for a high-performance, long focal length lens for their optical systems. It is available for purchase directly from Thorlabs, and the provided web link provides up-to-date information on its availability and pricing.