This is the G063346400, a 22.4 mm diameter UVFS mounted double-concave lens with an effective focal length (EFL) of -40mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is a symmetric concave design, featuring two concave surfaces with radii of curvature R1 (-40.388) and R2 (40.388). The lens's center thickness is 1.5mm, and it does not have any inner or outer radii. The lens's material is UVFS, identified as "UVFS mal- 1965" in the material database.
The lens is coated with Qio Silver RAGV 45 on both the front and back surfaces. This coating is specifically designed for use at a wavelength of 355nm.
The lens's geometry is spherical, and it is mounted, making it ready for immediate use in optical systems. According to the vendor's website, the lens is currently in stock, ensuring quick delivery upon order.