This is the G311202322 model from Qioptiq Photonics, a 6 mm diameter UVFS Double-Convex Lens with an effective focal length (EFL) of 5mm. The lens is spherical in shape, featuring a symmetric convex-convex design. The base shape is circular, and the lens has a thickness of 1mm at the edge and 3mm at the center.
The lens is made of UVFS material with the ID 'uvfs mal- 1965'. It is designed to operate at a wavelength of 355nm. The lens's front and back surfaces are coated with 'qio bbar arb2visnbk7', a coating that enhances its performance and durability.
The item data indicates that this lens is in stock and available for purchase on the Qioptiq Photonics website. For more detailed information, you can refer to the provided weblink: 'https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Symmetric-Convex-Lenses/Symmetric-convex-lenses-unmounted-fused-silica.html'.