This is a G314423329 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 -100mm, making it a negative or diverging lens. The radius of curvature for the first surface (r1) is -50.481 mm.
The lens is made of UVFS material with the Mal-1965 ID. It is designed to operate at a wavelength of 355 nm. The lens features a Qio HP Nbar ARHS-YAG coating on both the front and back surfaces, which is ideal for use with YAG lasers.
This lens is currently in stock and available for purchase on the Qioptiq Photonics website. For more information, please refer to the provided weblink.