This is a G063352329 Plano-Concave Lens, a spherical lens with a base shape of a circle, sourced from Qioptiq Photonics. The lens has a diameter of 22.4 mm and a center thickness of 1.5 mm. The effective focal length (EFL) of this lens is -40mm, indicating that it is a diverging lens, which spreads out light rays that enter it.
The lens is made of UVFS material with the Mal-1965 ID. It is designed to work with a wavelength of 355 nm. The lens's front and back surfaces are coated with Qio HP Nbar Arhs-Yag, a coating that enhances the lens's performance in specific applications.
The lens is mounted, suggesting that it is ready for immediate use in optical systems. The specific type of mount is not specified in the data, but it can be inferred that it is a fused silica mount, given the vendor and the lens type.
The lens data is currently valid and in stock, according to the vendor's website. This information is subject to change, so it is recommended to check the vendor's website for the most up-to-date information.