This is a 38.1 mm diameter Germanium Plano-Convex lens, offered by Alkor Technologies. The lens is uncoated and features an effective focal length (EFL) of 75mm. The lens's geometry includes a 2mm thickness at the edge and a 2.8mm thickness at the center. The inner and outer radii are both zero, and the lens has a plano-convex shape.
The lens is made of Germanium burnett, a material known for its excellent transmission properties in the infrared region, specifically at a wavelength of 10600nm. This makes the lens ideal for applications that require high-quality imaging or beam shaping in the infrared spectrum.
The lens's information is available on Alkor Technologies' website, and as of the time of data collection, it is listed as in stock. This indicates that the lens is readily available for purchase and use in various optical systems.