This is a Plano-Convex Lens, sourced from the renowned optical component vendor, Edmund Optics. The lens has a diameter of 9.0mm and a focal length of 20mm, making it suitable for a wide range of applications. The lens is made from the high-quality material n-BK7 Schott, which is known for its excellent optical properties and durability.
The lens features a VIS-NIR coating on both the front and back surfaces, specifically the edm visnir0sp2002000 coating. This coating enhances the lens's performance in the visible to near-infrared spectrum, which spans from 400 to 1000nm. This makes the lens ideal for applications that require high-quality imaging or light transmission in this spectral range.
The lens's geometry is also noteworthy. It has a thickness of 1.17mm at the edge and 2.2mm at the center. The radius of curvature of the convex surface is 10.34mm, and the back focal length is 18.55mm. The lens's base shape is circular, and it does not have any inner or outer radii.