This is a 12mm diameter, 24mm focal length double-convex lens, sourced from the reputable optical components vendor, Edmund Optics. The lens is made from fused silica, a material with the material ID 'fused sil mal-1965', and has a wavelength of 587.6nm.
The lens features a standard visible (VIS) coating on both the front and back surfaces, specifically the 'edm vis-0 std curve' coating. This coating is designed to enhance the lens' performance in the visible light spectrum, which spans from 425 to 675nm.
The lens' geometry includes a center thickness of 3.1mm and an edge thickness of 1.39mm. The front and back radii of curvature are 21.51mm and -21.51mm respectively, resulting in a back focal length of 22.92mm. The lens' shape is spherical, and it is designed to be circular.
According to the provided item data, this lens is currently in stock and available for purchase. For more detailed information, please refer to the vendor's website using the provided weblink.