This is a G312351400 12.7 mm Dia. N-BK7 Plano-Convex Lens, with a focal length (EFL) of 30mm, sourced from Qioptiq Photonics. The lens is currently in stock and available for purchase through their website.
The lens is of the Spherical type, specifically a Plano-Convex lens, and has a base shape of Circular. The diameter of the lens is 12.7mm, with a thickness at the edge of 1.6mm and a thickness at the center of 3mm. The focal length (EFL) is 30mm, and the first radius of curvature (r1) is 15.51mm. The inner and outer radii are both 0mm.
The lens is made of N-BK7 Schott material, a popular choice for its high refractive index and low dispersion. The lens is coated with Qio Silver RAGV 45 on both the front and back surfaces, which enhances its reflective properties.
This lens is suitable for a wide range of applications due to its high-quality materials and precise construction. It is ideal for use in systems that require a convex lens with a long focal length.