This is the G311212329 model from Qioptiq Photonics, a 22.4 mm diameter UVFS Double-Convex Lens designed for use with a focal length of 150mm at a wavelength of 1064nm. The lens is spherical in shape, featuring a symmetric convex-convex design.
The lens's geometry is defined by its edge thickness of 1.6mm and center thickness of 2.4mm. The first radius of curvature (R1) is 149.62mm, while the second radius of curvature (R2) is -149.62mm, indicating a double-convex structure. The lens does not have an inner or outer radius.
The lens is made from UVFS material, specifically identified as "uvfs mal- 1965". It comes with a coating on both the front and back surfaces, specifically "qio hp nbar arhs-yag". This coating is designed to optimize the lens's performance for use at a wavelength of 355nm.
According to the vendor's information, this item is currently in stock and can be purchased directly from the Qioptiq Photonics website. The link to the product page is provided for your convenience.