LB1450-B N-BK7 Bi-Convex Lens; Dia:0.5 in; f=20.0 mm ARC 650-1050nm

The LB1450-B 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 0.5 inches and a focal length of 20.0 mm, making it a versatile choice for a wide range of optical applications.

The lens is crafted 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 exceptional transmission in the visible and near-infrared spectra. The N-BK7 designation indicates that this lens is made from Schott glass, a brand renowned for its consistency and quality.

The LB1450-B features a spherical shape, with both surfaces curved outwards. This design, also known as a plano-convex lens, provides a wide field of view and low spherical aberration. The lens has a center thickness of 3.9 mm and an edge thickness of 1.8 mm, contributing to its robustness and durability.

The lens is coated with Thorlabs' BBAR (Broadband Anti-Reflection) coating, which significantly reduces surface reflections and increases transmission across the 650-1050 nm range. This coating enhances the lens's performance in applications such as laser systems, biomedical imaging, and optical spectroscopy.