The 49-951-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a catalog number 49-951-INK, is specifically designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning from 400 to 1000nm.
The lens features a 9mm diameter and an effective focal length (EFL) of 22.5mm, making it suitable for a wide range of optical applications. The lens is constructed from two types of Schott glass, N-SSK8 and N-SF56, which are renowned for their excellent optical properties.
The 49-951-INK lens is coated with Edmund Optics' proprietary VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces. This coating enhances the lens's performance in the VIS-NIR spectrum, reducing unwanted reflections and increasing transmission.
The lens's geometry is also noteworthy, with a center thickness of 3mm and edge thickness of 3.58mm. The lens's radii are R1=14.79mm, R2=-12.09mm, and R3=-45.72mm. The lens also features an inner radius of 0mm and an outer radius of 0mm.