This is a 50.8 mm diameter Germanium Plano-Convex lens, sourced from Alkor Technologies. The lens is uncoated and has an effective focal length (EFL) of 100mm. The lens is designed for use with a wavelength of 10600nm.
The lens is spherical in shape, with a planar surface on one side and a convex surface on the other. The thickness at the edge of the lens is 2.5mm, while the thickness at the center is 3.6mm. The inner radius of the lens is 0mm, and the outer radius is also 0mm, indicating a symmetrical curvature.
The lens is made of Germanium burnett, a material known for its high refractive index and transparency in the infrared spectrum. This makes the lens suitable for use in infrared optical systems.
According to the vendor's website, this lens is currently in stock, making it readily available for purchase and use. The website also provides further technical details and specifications, which can be accessed via the provided weblink.