KBX157 50.8 mm Dia. x 125 mm FL; Uncoated; Double-Convex Lens

The KBX157 is a high-quality, double-convex lens offered by MKS/Newport. This lens, which features a base shape of a circle, is designed for use in a wide range of optical applications. The lens is made from N-BK7 Schott glass, a popular material known for its excellent optical properties and versatility.

The KBX157 has a diameter of 50.8 mm and a thickness at the edge of 3 mm. The center thickness is 8.098 mm, providing a robust structure for the lens. The effective focal length (EFL) of this lens is 125 mm, making it suitable for applications that require a longer focal length.

The lens's first radius of curvature (R1) is 127.811 mm, while the second radius of curvature (R2) is -127.811 mm. This double-convex design allows for a high degree of light bending, making it ideal for use in imaging systems, beam shaping, and other applications where precise light control is required.

The back focal length (BFL) of the KBX157 is 122.3 mm. This measurement is taken from the back surface of the lens to the lens's principal plane, providing important information for designing optical systems.

Please note that this lens is uncoated. While uncoated lenses can be suitable for certain applications, they may be more susceptible to issues such as surface reflections and reduced transmission compared to coated lenses.

This lens is designed to work with a wavelength of 589 nm. It is important to ensure that the lens's specified wavelength matches the application's requirements to ensure optimal performance.