This is a G312258322 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 base and is designed for use within a specific wavelength range of 355 nm.
The lens is a spherical design, with a plano-convex geometry. The diameter of the lens is 12.5 mm, and it has a thickness of 1.3 mm at the edge, increasing to 3 mm at the center. The effective focal length (EFL) of the lens is 25 mm. The lens's front and back surfaces are coated with a Qio Bbar Arb2visnbk7 coating, which enhances its performance within its specified wavelength range.
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. This link provides a comprehensive overview of the lens, including its specifications and potential applications.