The 31-860 is a high-quality double-convex lens, boasting a 6mm diameter and a focal length of 6mm. This lens is sourced from the reputable vendor, Edmund Optics, and is currently in stock. The lens is made from n-SF5 Schott, a material known for its excellent optical properties.
The lens features a standard MgF2 coating on both the front and back surfaces, which is applied using Edmund Optics' proprietary coating process. This coating enhances the lens' performance by reducing reflection and increasing transmission within the 400-700nm wavelength range.
The geometry of the lens is meticulously designed, with an edge thickness of 1.29mm and a center thickness of 2.54mm. The first radius of curvature (R1) is 7.59mm, while the second radius (R2) is -7.59mm, indicating the double-convex shape. The back focal length (BFL) is 5.19mm, and the effective focal length (EFL) is also 6mm.
This lens is a spherical lens, meaning it has a surface that is a portion of a sphere. The base shape is circular, ensuring uniformity and consistency in the lens' performance. The lens is a perfect fit for applications that require high-performance optics within the specified wavelength range.