LB1779-A N-BK7 Bi-Convex Lens; Dia:1 in; f=300.0 mm ARC 350-700nm

The LB1779-A is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens is part of Thorlabs' extensive catalog of optical elements, which 3DOptix integrates into its advanced optical simulation software.

The lens is constructed from N-BK7, a popular glass type in the optical industry, known for its excellent optical properties and versatility. The lens has a diameter of 1 inch (25.4 mm) and a center thickness of 2.5 mm, with the edge thickness being 2 mm. The effective focal length (EFL) of this lens is 300 mm, making it suitable for a wide range of applications that require long focal lengths.

The lens's front and back surfaces are coated with ARC 350-700nm coating, which is designed to reduce reflection and increase transmission in the 350-700nm spectral range. This coating enhances the lens's performance in applications that use visible light.

The lens's geometry is spherical, with radii of curvature of 308.6 mm for the first surface and -308.6 mm for the second surface. The back focal length (BFL) is 299.2 mm. The lens's shape is circular, making it compatible with various optical systems.