This is a Plano-Convex lens, type 38-609, with a diameter of 25.4mm and a focal length of 125.0mm. The lens is sourced from Edmund Optics, a reputable vendor in the optical industry. The lens is made of n-bk7 schott, a popular optical glass due to its excellent optical properties.
The lens features a YAG-BBAR coating on both the front and back surfaces, specifically designed for the wavelength range of 500-1100nm. This coating enhances the lens's performance by reducing reflection and increasing transmission, making it ideal for various applications within this wavelength range.
The lens's geometry includes a thickness of 1.74mm at the edge and 3mm at the center. The inner and outer radii are 0, indicating a flat surface on the uncoated side and a curved surface on the coated side. The back focal length is 123.02mm, and the radius of curvature is 64.6mm.