This is a Si-px-38.1-50 lens, a 38.1 mm diameter Silicon Plano-Convex lens with an effective focal length (EFL) of 50.8mm. The lens is sourced from Alkor Technologies, a reputable vendor in the optical industry.
The lens is spherical in shape, with a base shape of circular. The geometry of the lens is such that the thickness at the edge is 2mm, while the thickness at the center is 3.5mm. The inner and outer radii are both zero, indicating a plano-convex design.
The lens is made of silicon, specifically silicon sal vil 1957, and is uncoated. The wavelength of operation for this lens is 10600nm.
The lens is in stock and available for immediate purchase, as indicated by the "weblink status" field. For more detailed information, please refer to the vendor's website, which is provided in the "weblinks" field.