LB1945-A N-BK7 Bi-Convex Lens; Dia:1 in; f=200.0 mm ARC 350-700nm

The LB1945-A is a high-quality bi-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is made from N-BK7 glass, a popular material known for its excellent optical properties and high damage threshold. The lens has a diameter of 1 inch (25.4 mm) and a focal length of 200.0 mm, making it suitable for use in systems where a long focal length is required.

The lens features a spherical shape, with both surfaces curved to focus light. The first surface has a radius of curvature of 205.6 mm, while the second surface has a radius of -205.6 mm. This design results in an effective focal length of 200.0 mm and a back focal length of 199.1 mm. The lens has a central thickness of 2.8 mm and an edge thickness of 2 mm, providing robustness and durability.

The LB1945-A is coated with a broadband anti-reflection coating, designed to reduce surface reflections and increase transmission in the 350-700 nm range. This coating is applied to both the front and back surfaces of the lens, ensuring high performance and low loss.

This lens is part of Thorlabs' extensive catalog of optical elements, which includes a wide range of lenses, mirrors, beam splitters, and other components. The lens is currently in stock, making it readily available for immediate use in your optical system.