This is a high-quality lens from OptoSigma, designed for use in the 400-700nm wavelength range. The lens, identified as SLB-25.4B-60PM, is a spherical lens with a base shape of a circle, featuring a double-convex design.
The lens has a diameter of 25.4mm and a thickness at the edge of 1.9mm, while the center thickness is 4.5mm. The effective focal length (EFL) of the lens is 60.8mm, making it suitable for a variety of optical applications. The first radius of curvature (R1) is 62.28mm, and the second radius of curvature (R2) is -62.28mm, indicating its double-convex structure. The back focal length (BFL) is 59.2mm.
The lens is made from n-bk7 schott, a popular material in optical applications due to its excellent optical properties. The lens is coated with opt m on both the front and back surfaces, enhancing its performance in the specified wavelength range.
This lens is currently in stock and can be purchased directly from the OptoSigma website using the provided weblink.