LB1092 N-BK7 Bi-Convex Lens; Dia:0.5 in; f=15.0 mm Uncoated

The LB1092 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs, a leading global manufacturer of photonics equipment. This lens, with a diameter of 0.5 inches and a focal length of 15.0 mm, is designed for use in a wide range of optical systems, including imaging, beam shaping, and laser applications.

The lens is made from N-BK7, a popular borosilicate glass known for its excellent optical properties. This material is characterized by a high refractive index and low dispersion, making it ideal for applications that require high-precision imaging or light manipulation. The lens's geometry features a bi-convex design, with both surfaces curved outward, which provides a strong focusing power and a wide field of view.

The lens's key specifications include a diameter of 12.7 mm, an edge thickness of 1.8 mm, and a center thickness of 4.7 mm. The effective focal length (EFL) is 15 mm, and the radii of curvature for the first and second surfaces are 14.6 mm and -14.6 mm, respectively. The back focal length (BFL) is 13.4 mm.

Notably, this lens is uncoated, meaning it does not have any anti-reflective coatings. While this may result in higher reflective losses at the air-glass interfaces, it also means the lens can be used over a broad spectral range, from the ultraviolet to the near-infrared.