This is a ZnSe-px-25.4-63 25.4 mm Dia. CVD ZnSe Plano-Convex Lens, sourced from Alkor Technologies. The lens is uncoated and features a spherical shape, specifically designed for use in optical systems.
The lens has a diameter of 25.4 mm and a thickness at the edge of 2 mm. The center thickness is slightly greater at 2.9 mm. The effective focal length (EFL) of this lens is 63.5 mm, making it suitable for a variety of applications.
The lens is made from ZnSe material, specifically ZnSe marple-1964, and is designed to work with a wavelength of 10600 nm. The base shape of the lens is circular, and it is a Plano-Convex type, meaning one side is flat while the other side is curved.
The inner and outer radii of the lens are 0, indicating a simple curvature. The lens data can be found on Alkor Technologies' website, and the link provided indicates that the lens is currently in stock.