This is a ZnSe-px-50.8-150 50.8 mm Dia. CVD ZnSe Plano-Convex Lens, sourced from Alkor Technologies. The lens is designed for use with a wavelength of 10600 nm and is uncoated.
The lens is a Spherical Lens of the Plano-Convex type, featuring a circular base shape. The diameter of the lens is 50.8 mm, with a thickness at the edge of 2.5 mm and a thickness at the center of 4 mm. The Effective Focal Length (EFL) of the lens is 150 mm.
The lens is made from ZnSe material, specifically from the ZnSe marple-1964 batch. The inner radius of the lens is 0 mm, and the outer radius is also 0 mm.
The lens is in stock and available for purchase. For more information, please refer to the vendor's website at http://www.alkor.net/ZnSe_lenses_pcx.html.