This is the G063352331 model from Qioptiq Photonics, a 22.4 mm diameter Plano-Concave Spherical Lens with a fused silica mount. The lens is designed for use with a wavelength of 355 nm and features a -40 mm effective focal length (EFL).
The lens's geometry includes a center thickness of 1.5 mm and a radius of curvature (R1) of -20.097 mm for the concave surface. The lens's inner and outer radii are both zero, indicating a planar surface on the opposite side of the concave surface.
The lens is made from UVFS material with the ID 1965. It comes with a Qio AR/RLVIS AOI 45 coating on both the front and back surfaces, enhancing its performance in specific applications.
The item data also indicates that this lens is in stock and available for purchase on the Qioptiq Photonics website. For more detailed information, users are encouraged to visit the provided weblink.