This is a G311715322 31.5 mm Dia. UVFS Double-Convex Lens, with an effective focal length (EFL) of 80mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is a Spherical Lens of the Sub Type Symmetric-Convex, featuring a Base Shape of Circular. The geometry of the lens includes a diameter of 31.5mm, a thickness at the edge of 2mm, and a thickness at the center of 5.1mm. The lens's inner and outer radii are both zero, and the radii of curvature are r1 = 80.583 and r2 = -80.583.
The lens is made of UVFS material with the Material ID uvfs mal- 1965. It is designed to operate at a wavelength of 355nm. The lens features a coating on both the front and back surfaces, specifically qio bbar arb2visnbk7.
This 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.