The 48-700 is a double-concave spherical lens with a 9mm diameter and a focal length of -18mm. This lens is sourced from Edmund Optics and is currently in stock. It is designed for use in the visible to near-infrared spectrum, with a wavelength of 587.6nm.
The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties and high transmittance in the visible spectrum. The lens features a double-concave geometry, with radii of curvature of -18.86mm and 18.86mm for the first and second surfaces, respectively. This geometry results in a back focal length of -18.49mm.
The lens has a center thickness of 1.5mm and an edge thickness of 2.45mm, providing robustness and durability. The 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 in the visible to near-infrared spectrum, improving its transmittance and reducing reflections.