49-957-INK 20 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=50mm VIS-NIR 400-1000nm

The 49-957-INK is a high-quality Achromatic Doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 20 mm, is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, specifically catering to the wavelength range of 400-1000nm.

The lens boasts an effective focal length (EFL) of 50mm, making it suitable for a wide range of optical applications. The lens is constructed from two types of glass, N-SSK8 and N-SF56, both from Schott, ensuring high-quality performance and durability.

The 49-957-INK features a front and back coating of EDm VIS-NIR 0SP2002000, which further enhances its performance in the specified wavelength range. The lens has a center thickness of 4.8mm and an edge thickness of 4.78mm, providing a robust structure.

The lens geometry includes an inner radius of 0mm, an outer radius of 0mm, and radii of curvature of 36.92mm, -25.65mm, and -77.89mm for the first, second, and third surfaces, respectively. This complex geometry is designed to correct chromatic aberration, a common issue in optical systems.

The lens is currently in stock and available for purchase through the Edmund Optics website, as indicated by the "weblink status" field in the item data. For more information, users can refer to the provided catalog number and the detailed product page linked in the item data.