This is the G063823331 model from Qioptiq Photonics, a 25.4 mm diameter N-BK7 mounted plano-convex lens with an effective focal length (EFL) of 100mm. The lens is spherical in shape, featuring a plano-convex base shape and a circular geometry.
The lens's thickness at the edge is 2.4mm, while its center thickness is 4mm. The inner and outer radii are both zero, and the first radius of curvature (R1) is 51.212mm. The lens is made of N-BK7 Schott material and is designed for use with a wavelength of 588nm.
The lens is coated with Qio AL RALVIS AOI 45 on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission. The lens is currently in stock and available for purchase on the Qioptiq Photonics website.