The 45-898 is a double-convex lens with a diameter of 30mm and a focal length of 50mm, sourced from Edmund Optics. This lens is designed for use within the visible to near-infrared spectrum, specifically catering to wavelengths between 400 and 1000nm.
The lens is constructed from N-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The base shape of the lens is circular, and it features a spherical geometry, with radii of curvature R1 and R2 at 50.56mm and -50.56mm respectively. The lens has an edge thickness of 2mm and a center thickness of 6.55mm, while the back focal length (BFL) measures 47.82mm.
The 45-898 lens is coated with a VIS-NIR coating, specifically the EDM VISNIR0SP2002000 coating, on both the front and back surfaces. This coating enhances the lens's performance within the specified wavelength range, improving transmission and reducing reflection.