This is a 50.8 mm diameter Germanium Plano-Convex lens, offered by Alkor Technologies. The lens is uncoated and has an effective focal length (EFL) of 200mm. The lens is designed for use with a wavelength of 10600 nm.
The lens has a base shape of circular and features a Spherical geometry. The thickness at the edge of the lens is 2.5 mm, while the thickness at the center is 3 mm. The inner radius of the lens is 0, and the outer radius is also 0.
The lens is made of Germanium Burnett, a specific type of Germanium. The lens is designed for use in the infrared spectrum, making it suitable for a variety of applications in this range.
The vendor, Alkor Technologies, provides a valid link to the product on their website, indicating that the lens is in stock. This ensures that users can easily access more information about the lens and purchase it if needed.