The 49-343-INK is an 18 mm diameter achromatic doublet lens, designed for use in the visible to near-infrared spectrum (400-1000nm). This lens is sourced from Edmund Optics, a leading provider of optical components. The lens is part of their multiplet series, featuring a complex design to optimize performance.
The lens is constructed from two types of Schott glass, N-SSK8 and N-SF10, which are renowned for their high-quality optical properties. The front and back surfaces of the lens are coated with the EDM VIS-NIR 0SP2002000 coating, which is specifically designed for use in the visible to near-infrared spectrum. This coating enhances the lens's transmission and reduces reflection, improving its overall performance.
The lens has an effective focal length (EFL) of 50mm, making it suitable for a wide range of applications. The geometry of the lens includes a thickness of 5.69mm at the edge, a center thickness of 5mm, and a center thickness 'a' of 2.3mm. The lens's inner and outer radii are 0, indicating a circular shape. The lens's first and second radii of curvature are 27.12mm and -25.66mm, respectively, while the third radius of curvature is -538.7mm.