LA1256-AB 50.8 mm Dia. N-BK7 Plano-Convex Lens; EFL=300mm 400-1100nm

The LA1256-AB is a Plano-Convex lens with a diameter of 50.8 mm, sourced from the reputable optical components manufacturer, Thorlabs. This lens is made from N-BK7, a popular glass type known for its excellent optical properties, particularly its low dispersion. The lens's geometry includes a 3 mm thickness at the edge and a 5.1 mm thickness at the center, with an effective focal length (EFL) of 299 mm, making it suitable for a wide range of optical applications.

The LA1256-AB lens features a spherical shape, which is a common choice due to its ease of manufacturing and versatility. The front and back surfaces of the lens are coated with THo AB Bbar, a broadband anti-reflection coating that enhances transmission in the 400-1100 nm range. This coating reduces surface reflections, thereby increasing the amount of light that passes through the lens, which is crucial in many optical systems.

The lens's design, with its Plano-Convex configuration, provides a large flat surface for easy integration into optical systems. The curvature of the lens (with a radius of 154.5 mm) ensures that light is focused accurately, making this lens an excellent choice for imaging and beam shaping applications.