LB1811-A N-BK7 Bi-Convex Lens; Dia:1 in; f=35.0 mm ARC 350-700nm

The LB1811-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, a popular glass type known for its excellent optical properties, making it an ideal choice for applications that require high-performance optics.

The lens features a diameter of 1 inch (25.4 mm) and a focal length of 35.0 mm, providing a high level of magnification and a wide field of view. The bi-convex design, with radii of curvature of 34.9 mm on both sides, ensures excellent image quality and low distortion.

The lens is coated with a broadband anti-reflection coating, designed to reduce surface reflections and increase transmission in the 350-700 nm range. This coating enhances the lens's performance in a variety of lighting conditions, making it suitable for use in both low-light and brightly lit environments.

The lens has a central thickness of 6.8 mm and an edge thickness of 2 mm, providing excellent mechanical stability and resistance to damage. The lens is also designed with a clear aperture, allowing for maximum light transmission and minimal vignetting.