The SLB-15B-40PM is a high-quality double-convex lens offered by OptoSigma, a leading vendor in the optical industry. This lens, with a diameter of 15.0 mm and a focal length of 40.6 mm, is designed for use in the visible light spectrum, specifically between 400-700 nm.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The base shape of the lens is circular, and it features a spherical geometry. The thickness at the edge of the lens is 2.0 mm, while the center thickness is 3.4 mm. The effective focal length (EFL) is 40.6 mm, and the back focal length (BFL) is 39.4 mm. The radii of curvature for the first and second surfaces are 41.52 mm and -41.52 mm, respectively.
The SLB-15B-40PM comes with a coating on both the front and back surfaces. This coating, identified as 'opt m', is designed to enhance the lens's performance in the specified wavelength range. The lens is currently in stock and available for immediate purchase through the provided web link.