This is the G063319400, a 22.4 mm diameter UVFS mounted double-convex lens with an effective focal length (EFL) of 50mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is of the spherical type, specifically a symmetric convex-convex lens, and is mounted on fused silica. The base shape is circular, with a thickness of 1.6mm at the edge and 4.2mm at the center. The lens is designed to operate at a wavelength of 355nm and features a coating of Qio Silver RAGV 45 on both the front and back surfaces.
The lens's geometry is defined by its inner and outer radii, which are 0mm each, and its radii of curvature, R1 and R2, which are 49.403mm and -49.403mm respectively. The lens material is identified as UVFS MAL-1965.
According to the provided data, the lens is currently in stock and available for purchase. For more detailed information, you can refer to the vendor's website through the provided weblink, which is valid and leads to the product's page.