LA1255-A N-BK7 Plano-Convex Lens; Dia:25.0 mm; f=50.0 mm ARC 350-700nm

The LA1255-A is a high-quality plano-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, and is manufactured by Schott, a leading glass manufacturer.

The lens has a diameter of 25.0 mm and a focal length of 50.0 mm, making it a versatile choice for many setups. The edge thickness is 2.07 mm, while the center thickness is 5.3 mm, providing a good balance between weight and durability. The effective focal length (EFL) is also 50.0 mm, which is the distance from the lens's center to the focal point.

The LA1255-A is coated with a broadband anti-reflection coating (ARC) that covers the wavelength range of 350-700 nm. This coating reduces unwanted reflections and increases transmission, enhancing the performance of the lens in various applications.

The lens's geometry is spherical, with a radius of curvature (R1) of 25.8 mm for the convex surface. The back surface is planar. The lens is designed to be used in air, with an inner radius of 0 mm and an outer radius of 0 mm.