This is a Plano-Convex lens, type of spherical lens, with a circular base shape and a diameter of 22.4 mm. The lens has a thickness of 2 mm at the edge and 4.5 mm at the center. The effective focal length (EFL) of this lens is 50 mm. The front and back radii of the lens are 26.416 mm and 0 mm, respectively. The lens is made of N-BK7 Schott, a popular optical glass, and has a coating of Qio Al Ralvis Aoi 45 on both the front and back surfaces. The lens is designed for use at a wavelength of 588 nm. The lens's shape is spherical.
The lens is sourced from Qioptiq Photonics, a leading vendor in the field of precision optics. According to the vendor's information, the lens is in stock and available for immediate purchase. The vendor's website provides further details and specifications about the lens.