The 37-778 is a 9.0mm diameter, 10mm focal length Plano-Convex lens, sourced from Edmund Optics. This lens, made from n-SF11 Schott glass, is uncoated and features a spherical shape. The lens's geometry includes an edge thickness of 1.28mm and a center thickness of 2.7mm. The inner and outer radii are both 0mm, and the back focal length (BFL) is 8.49mm. The effective focal length (EFL) is 10mm. The lens is designed to operate at a wavelength of 587.6nm. This lens is circular in base shape and is a type of Spherical Lens, specifically a Plano-Convex lens. The lens's status is in stock, and it can be found on the Edmund Optics website with the provided weblink.