The 49-249 is a UV-AR coated, UV double-convex lens, boasting a 9mm diameter and a 9mm focal length. This lens, sourced from the reputable vendor Edmund Optics, is a spherical lens with a convex-convex base shape and a circular geometry.
The lens has a thickness of 1.84mm at the edge and 4.9mm at the center, with an effective focal length (EFL) of 9mm. The first radius of curvature (R1) is 7.39mm, while the second radius of curvature (R2) is -7.39mm, and the back focal length (BFL) is 7.12mm. The lens does not have an inner radius or an outer radius.
The lens is made from fused silica material, identified as mal-1965 in the Material ID. It is designed to operate at a wavelength of 587.6nm. The lens features UV-AR coating on both the front and back surfaces, adhering to the standard curve as defined by Edmund Optics.