This is a G312257322 12.5 mm Dia. UVFS Plano-Convex Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which is currently in stock, has a fused silica material ID (UVFS Mal-1965) and is designed for use within the wavelength range of 355nm.
The lens is spherical in shape, with a base shape of circular. It has a diameter of 12.5mm, an edge thickness of 1.3mm, and a center thickness of 3.5mm. The effective focal length (EFL) of this lens is 20mm. The front and back of the lens are coated with Qio Bbar Arb2visnbk7, providing enhanced performance and durability.
For more detailed information, please refer to the vendor's website at https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Plano-Convex-Lenses/Plano-convex-lenses-unmounted-fused-silica.html.