This is a G311205322 12.5 mm Dia. UVFS Double-Convex Lens, with a effective focal length (EFL) of 16mm, sourced from the reputable vendor Qioptiq Photonics. The lens is designed for use in the ultraviolet spectrum, specifically at a wavelength of 355nm, making it suitable for a variety of applications in this range.
The lens is spherical in shape, with a base shape of circular. It has a diameter of 12.5mm and a thickness at the edge of 1.2mm, while the center thickness is 3.8mm. The lens features a double-convex design, with radii of curvature of 15.735mm on both the front and back surfaces. The inner and outer radii are 0mm, indicating a symmetrical lens design.
The lens is made from UVFS material, identified as "uvfs mal- 1965". It comes with a broadband anti-reflection coating on both the front and back surfaces, specifically Qio Bbar Arb2visnbk7. This coating is designed to reduce surface reflections and increase transmission, enhancing the performance of the lens in its intended application.
The lens is currently in stock and available for purchase. For more information, please refer to the vendor's website at https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Symmetric-Convex-Lenses/Symmetric-convex-lenses-unmounted-fused-silica.html.