LB1309-C N-BK7 Bi-Convex Lens; Dia:2 in; f=75.0 mm ARC 1050-1700nm

The LB1309-C is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens boasts a diameter of 2 inches, or 50.8 millimeters, and a focal length of 75.0 millimeters, making it suitable for a wide range of optical applications.

The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is particularly prized for its low dispersion, high homogeneity, and excellent transmission characteristics across a broad spectrum, from the ultraviolet to the infrared regions.

The LB1309-C features a spherical geometry, with both faces of the lens curved outwards. This design, known as a bi-convex lens, provides a wide field of view and low spherical aberration, making it ideal for imaging and beam shaping applications.

The lens is coated with a broadband anti-reflection coating, designed to reduce surface reflections and increase transmission across the 1050-1700 nanometer range. This coating ensures optimal performance in infrared applications, such as thermal imaging and laser systems.