63-643 18mm Dia. x 18mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm

The 63-643 is a high-quality double-convex lens, 18mm in diameter and featuring a focal length of 18mm. This lens is sourced from Edmund Optics, a renowned vendor known for their extensive catalog of optical elements. The lens is designed for use within the near-infrared (NIR) spectrum, specifically between 600 and 1050nm.

The lens is made from n-sf11 Schott, a high-index glass with excellent transmittance in the NIR region. This material allows for a compact lens design while maintaining high optical performance. The lens features a double-convex geometry, with radii of curvature of 27.22mm and -27.22mm for the front and back surfaces, respectively. This geometry provides a large numerical aperture, making it suitable for a wide range of applications.

The lens is coated with Edmund Optics' NIR I standard curve coating on both the front and back surfaces. This coating is designed to enhance the lens' performance in the NIR region, reducing reflections and increasing transmission. The coating is applied using a standard curve process, ensuring consistent performance across all lenses.

The lens has a center thickness of 4.5mm and an edge thickness of 1.44mm, providing a robust and durable design. The lens is circular in shape, making it compatible with a wide range of optical systems. The effective focal length (EFL) of the lens is 18mm, and the back focal length (BFL) is 16.69mm.