LB1027-A N-BK7 Bi-Convex Lens; Dia:1 in; f=40.0 mm ARC 350-700nm

The LB1027-A is a high-quality bi-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is made from N-BK7, a popular optical glass known for its excellent optical properties and high damage threshold. The lens has a diameter of 1 inch (25.4 mm) and a focal length of 40.0 mm, making it a versatile choice for many setups.

The lens geometry includes a center thickness of 6.1 mm and an edge thickness of 2 mm, providing robustness and stability. The effective focal length (EFL) is 40 mm, and the back focal length (BFL) is 37.9 mm. The radii of curvature for the first and second surfaces are 40.1 mm and -40.1 mm, respectively. The lens has no inner or outer radius, indicating a uniform curvature across the entire surface.

The LB1027-A is coated with a broadband anti-reflection coating (ARC) that covers the wavelength range of 350-700 nm. This coating reduces surface reflections, improving transmission and enhancing overall system performance. The coating is applied to both the front and back surfaces of the lens.

This lens is a spherical lens, meaning it has a spherical surface. The spherical shape is the simplest and most common type of lens surface and is used in a wide variety of applications. The lens is designed for use in the visible spectrum, with a central wavelength of 633 nm.