This is the G312306400 31.5 mm Dia. UVFS Plano-Convex Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which has a focal length (EFL) of 400mm, is a spherical lens with a plano-convex base shape and a circular geometry.
The lens has a diameter of 31.5mm and a thickness at the edge of 1.5mm, while the center thickness is 2.1mm. The inner and outer radii are 0mm, and the radius of curvature (R1) is 199.53mm. The lens is made from UVFS material with a Mal-1965 ID.
The lens is designed to operate at a wavelength of 355nm and features a coating on both the front and back surfaces. The front coating is Qio Silver RAGV 45, and the back coating is also Qio Silver RAGV 45.
The lens is currently in stock and available for purchase on the Qioptiq Photonics website. For more information, please refer to the provided weblink.