This is a G063162329 model lens from Qioptiq Photonics, a renowned vendor in the field of precision optics. The lens is spherical in shape, specifically a symmetric convex-convex lens, and is mounted on fused silica (UVFS). The lens has a base shape of a circle, with a diameter of 31.5 mm.
The lens's edge thickness is 2 mm, while the center thickness is 8.6 mm. The effective focal length (EFL) of the lens is 40 mm, and the radii of curvature are 39.243 mm for both the first and second surfaces. The lens does not have an inner or outer radius.
The lens is made of UVFS material with the ID "uvfs mal- 1965". It is designed to operate at a wavelength of 355 nm. The lens's front and back surfaces are coated with "qio hp nbar arhs-yag".
According to the vendor's website, this item is currently in stock. For more information, you can visit the following link: https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Symmetric-Convex-Lenses/Symmetric-convex-lenses-mounted-fused-silica.html