SLB-25.4-40N 25.4 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated

The SLB-25.4-40N is a plano-concave lens with a diameter of 25.4 mm and a focal length of -40.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is uncoated. The lens is made of n-bk7 schott material, a popular choice for its high refractive index and low dispersion.

The lens's geometry is characterized by a thickness edge of 6.3 mm and a thickness center of 2 mm. The inner and outer radii are both 0 mm, indicating a flat surface on one side and a concave surface on the other. The radius of curvature (R1) is -20.76 mm, and the back focal length (BFL) is -41.3 mm.

The lens is designed to operate at a wavelength of 546.1 nm. It is spherical in shape, a common choice for its ease of manufacturing and versatility. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.

This lens is available for purchase from the OptoSigma website, where you can find more detailed specifications and related products. The link to the product page is valid and indicates that the lens is in stock, ready for immediate dispatch.