This is a G314421322 Plano-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which is unmounted and made of fused silica, 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, making it a concave lens.
The lens is designed to work with a wavelength of 355nm, and it comes with a front and back coating of qio bbar arb2visnbk7. This coating is specifically designed to enhance the lens's performance in the visible spectrum.
The lens's geometry is spherical, with an inner radius of 0 and an outer radius of 0. The curvature of the lens is defined by a radius of -20.097mm on the concave side.
This lens is currently in stock and available for purchase on the Qioptiq Photonics website. It is a versatile and reliable choice for a wide range of optical applications, thanks to its high-quality construction and precise specifications.