LB1757-C N-BK7 Bi-Convex Lens; Dia:1 in; f=30.0 mm ARC 1050-1700nm

The LB1757-C is a high-quality bi-convex lens offered by Thorlabs, a leading vendor in the optical industry. This lens is designed with a spherical geometry, featuring a diameter of 1 inch and a center thickness of 3.1 mm. The lens's edge thickness is 2 mm, and it has a clear aperture of 25.4 mm.

The lens's focal length (efl) is 40 mm, and the radii of curvature for the first and second surfaces are 29.5 mm and -29.5 mm, respectively. The back focal length (bfl) of the lens is 27.3 mm. The lens is made of N-BK7 glass, a popular material in the optical industry due to its excellent optical properties and wide transparency range.

The LB1757-C lens is coated with a broadband anti-reflection coating (tho c bbar) that is designed to operate over the 1050-1700 nm wavelength range. This coating reduces surface reflections, thereby increasing the lens's transmission and improving overall system performance.

The lens is available for purchase directly from Thorlabs' website, and the link provided indicates that it is currently in stock. This makes it an ideal choice for users who need a reliable and high-performing lens for their optical systems.