SLB-10-40N 10.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated

The SLB-10-40N is a plano-concave lens with a diameter of 10.0 mm and a focal length of -40.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is uncoated. The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and high transmittance in the visible spectrum.

The lens's geometry includes a thickness edge of 2.6 mm and a thickness center of 2.0 mm, with an inner radius of 0 mm and an outer radius of 0 mm. The back focal length (BFL) is -41.3 mm, and the radius of curvature (R1) is -20.76 mm. The lens is designed to operate at a wavelength of 546.1 nm.

This lens is a spherical lens, which means it has a spherical surface, and it falls under the sub-type of plano-concave lenses. The plano-concave lens has one flat surface and one curved surface that is concave, or hollowed out. This particular lens is designed for use in various optical systems where a negative lens is required.

Please note that the lens is uncoated, which means it does not have any anti-reflective coatings. This may result in unwanted reflections, especially when working with high-intensity light sources. However, uncoated lenses are generally more cost-effective and can be a good choice for applications where such reflections are not a concern.