This is a high-quality double-convex lens, 89-237, offered by Edmund Optics. It boasts a 10mm diameter and a focal length of 50mm, making it suitable for a wide range of optical applications. The lens is made from the renowned N-BK7 glass from Schott, a material known for its excellent optical properties and versatility.
The lens features a YAG-BBAR coating on both the front and back surfaces, ensuring high transmission and durability. This coating is designed to operate within the wavelength range of 500-1100nm, making it ideal for use in various light sources, including visible and near-infrared spectra.
The geometry of the lens is meticulously designed with an edge thickness of 2.01mm and a center thickness of 2.5mm. The radii of curvature for the first and second surfaces are 51.25mm and -51.25mm, respectively, contributing to its double-convex shape. The back focal length of this lens is 49.17mm, and both inner and outer radii are 0mm, indicating a circular shape without any additional shaping.