This is a G063012000 31.5 mm diameter N-BK7 mounted double-convex lens, with a focal length (EFL) of 40mm, sourced from Qioptiq Photonics. The lens is uncoated, which means it does not have any additional layers to enhance light transmission or protect the surface.
The lens is spherical in shape, with a base shape of a circle. The geometry of the lens includes a diameter of 31.5mm, a thickness at the edge of 2.1mm, and a thickness at the center of 8.3mm. The first radius of curvature (R1) is 41.867, and the second radius of curvature (R2) is -41.867, indicating a symmetric convex-convex design. The inner and outer radii are both zero.
The lens is made of N-BK7, a type of glass commonly used in optical applications due to its excellent optical properties. This specific lens is from the Schott brand, a leading manufacturer of optical glass.
The lens is designed to operate at a wavelength of 587.6nm. It is in stock and available for purchase on the Qioptiq Photonics website.