This is the G311027331 model from Qioptiq Photonics, a 22.4 mm diameter UVFS Double-Convex Lens with an effective focal length (EFL) of 80mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is a Spherical Lens of the Sub Type Symmetric-Convex, featuring a Base Shape of Circular. The geometry of the lens includes a thickness edge of 1.7mm and a thickness center of 3.3mm. The lens is made from UVFS material with the ID mal- 1965.
The lens is designed to operate at a wavelength of 355nm. It comes with a front and back coating of qio al ralvis aoi 45. The lens's shape is spherical, and it has no inner or outer radius.
The lens's web link is valid and in stock, and you can find more information about it on the Qioptiq Photonics website.