The 49-956-INK is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 20 mm, is specifically engineered for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens is part of Edmund Optics' extensive catalog, and it is currently in stock, as indicated by its weblink status.
The lens features a focal length (EFL) of 25mm, making it suitable for a wide range of optical applications. The geometry of the lens includes an edge thickness of 8.06mm, an inner radius and outer radius of 0, and a center thickness of 9.5mm. The lens also features a center thickness 'a' of 2.5mm.
The 49-956-INK is composed of two types of glass, N-BAF10 and N-SF6, both from Schott. These materials are carefully selected to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.
The lens is coated with Edmund Optics' VIS-NIR0SP2002000 coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the VIS-NIR spectrum, providing improved transmission and durability.