SLB-05-20P 5.0 mm Dia. x 20.0 mm FL; Plano-Convex Lens Uncoated

The SLB-05-20P is a 5.0 mm diameter Plano-Convex lens, uncoated, with a focal length of 20.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-BK7 Schott material, a popular choice for its high refractive index and low dispersion, making it ideal for a wide range of optical applications.

The lens geometry features a convex surface with a radius of curvature of 10.38 mm, and a planar surface on the other side. The center thickness of the lens is 1.4 mm, while the edge thickness is 1.1 mm, providing a robust structure. The lens has a clear aperture of 5.0 mm, and the effective focal length (EFL) is 20.0 mm, as indicated by its name.

The back focal length (BFL) of the lens is 19.1 mm, which is the distance from the rear surface of the lens to the image plane in a collimated beam configuration. The lens does not have any coating, as indicated in the item data, which means it is in its raw state. This could be beneficial in applications where the introduction of a coating might interfere with the desired optical properties.

The item data also indicates a wavelength of 546.1 nm, suggesting that this lens is designed to operate optimally in the yellow-green region of the visible light spectrum. However, it can be used across a broader spectrum depending on the specific requirements of the application.