67-561-INK 25.4mm Dia. x 38.1mm FL; NIR II; Inked; Plano-Convex Lens NIR II 750-1550nm

This is a Plano-Convex lens, specifically designed for use in the Near-Infrared II (NIR II) spectrum, with a diameter of 25.4mm and a focal length of 500mm. The lens is sourced from the reputable optical vendor, Edmund Optics. It is inked, which is a common practice in the industry to facilitate identification and tracking of optical components.

The lens is made of N-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and wide transparency range. The front and back surfaces of the lens are coated with Edmund Optics' standard NIR-II coating, designed to enhance performance in the NIR II spectrum, specifically between 750nm and 1550nm.

The lens has a plano-convex geometry, meaning one side is flat (plano) and the other side is curved (convex). The radius of curvature for the curved side is 258.4mm. The lens has an edge thickness of 2.9mm and a center thickness of 3.2mm. The back focal length (BFL) is 497.89mm.

This lens is a great choice for applications that require high-performance in the NIR II spectrum, such as biomedical imaging, night vision, and optical communication systems. It is available for purchase directly from the Edmund Optics website, and the link provided indicates that it is currently in stock.