89-121 3mm Dia. x 9mm FL; VIS-EXT Coated; Double-Convex Lens VIS-EXT 350-700nm

The 89-121 is a high-quality double-convex lens, boasting a 3mm diameter and a focal length of 9mm. This lens is sourced from the reputable vendor, Edmund Optics, and is available in stock for immediate use. The lens is fabricated from the renowned N-BK7 glass, a borosilicate crown glass known for its excellent optical properties, including low dispersion and high homogeneity.

The lens features a front and back coating of EDM VIS-EXT, a broadband anti-reflection coating designed for use in the visible spectrum, specifically between 350-700nm. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and improving image quality.

The lens's geometry is meticulously designed, with a thickness of 1.35mm at the edge and 1.6mm at the center. The front and back radii of curvature are 9.02mm and -9.02mm, respectively, contributing to the lens's double-convex shape. The back focal length is 8.46mm, and the lens has no inner or outer radius, indicating a uniform curvature throughout.