49-949-INK 6.25 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=17.5mm VIS-NIR 400-1000nm

The 49-949-INK is a high-quality Achromatic Doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 6.25 mm, is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens is specifically designed for applications that require superior image quality and color correction.

The lens features a focal length (EFL) of 17.5 mm, making it suitable for a wide range of optical systems. The geometry of the lens includes an edge thickness of 3.18 mm, an inner radius of 0, and an outer radius of 0. The center thickness is 2.75 mm, with an additional center thickness 'a' of 1 mm. The lens's base shape is circular, contributing to its wide range of applications.

The 49-949-INK is composed of two types of materials: N-SSK8 and N-SF56, both from Schott. These materials are known for their excellent optical properties, making them ideal for use in achromatic doublets. The lens is coated with EDm VISNIR0SP2002000 on both the front and back surfaces, enhancing its performance in the VIS-NIR spectrum.

The lens is available in a multiplet shape, which refers to an optical system composed of multiple lenses. This shape allows for more complex optical designs, providing superior image quality and color correction. The lens's catalog number is 49-949-INK, and it can be found on the Edmund Optics website, where it is currently in stock.