LA1301-B N-BK7 Plano-Convex Lens; Dia:2 in; f=250.0 mm ARC 650-1050nm

The LA1301-B is a Plano-Convex lens, a type of spherical lens, sourced from Thorlabs, a renowned vendor in the optical industry. This lens is characterized by its circular base shape and is designed for use in a wide range of applications due to its versatile specifications.

The lens has a diameter of 2 inches (50.8 mm) and a thickness that varies from 3 mm at the edge to 5.5 mm at the center. It boasts an effective focal length (EFL) of 250 mm, making it suitable for applications that require a longer focal length. The lens's front radius of curvature (R1) is 128.8 mm, and the back focal length (BFL) is 245.5 mm, providing a clear understanding of its curvature and focusing capabilities.

The LA1301-B is made from N-BK7, a popular optical glass from Schott, known for its excellent optical properties and high damage threshold. This material is particularly suitable for applications in the visible and near-infrared spectrum, with a central wavelength of 587.6 nm.

The lens features broadband anti-reflection (BBAR) coatings on both the front and back surfaces, specifically designed for the 650-1050 nm range. These coatings reduce surface reflections, thereby increasing transmission and improving overall system performance.