67-660 30mm Dia. x 50mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

The 67-660 is a high-quality double-convex lens, designed and manufactured by Edmund Optics, a leading global provider of optical components. This lens boasts a 30mm diameter and a focal length of 50mm, making it suitable for a wide range of applications.

The lens is constructed from N-BK7 Schott glass, a popular material due to its excellent optical properties and versatility. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature of 50.56mm on both sides. This geometry provides a high level of optical performance, with a large numerical aperture and low spherical aberration.

The lens is coated with Edmund Optics' NIR-II standard curve coating on both the front and back surfaces. This coating is specifically designed for use in the near-infrared (NIR) spectrum, enhancing the lens' performance in this critical range. The coating ensures high transmission and low reflectance, making the lens ideal for use in applications such as night vision, thermal imaging, and spectral analysis.

The lens has a center thickness of 6.55mm and an edge thickness of 2mm, providing excellent mechanical stability and resistance to damage. The effective focal length (EFL) of the lens is 50mm, and the back focal length (BFL) is 47.82mm. The lens has no inner or outer radius, indicating a uniform thickness throughout.