67-626 12mm Dia. x 36mm FL; NIR II Coated; Double-Convex Lens NIR II 750-1550nm

The 67-626 is a high-performance double-convex lens, designed and manufactured by Edmund Optics, specifically for use in the near-infrared (NIR) spectrum. This lens boasts a 12mm diameter and a focal length of 36mm, making it suitable for a wide range of applications that require precise optical performance in the NIR range.

The lens is constructed from N-BK7 Schott glass, a material known for its excellent optical properties and versatility. This glass is particularly well-suited for use in the NIR spectrum, providing high transmittance and low dispersion. The lens features a standard curve coating on both the front and back surfaces, specifically the EDM NIR-II std curve. This coating is designed to enhance the lens's performance in the NIR range, improving transmission and reducing reflection.

The geometry of the lens is carefully designed to optimize its performance. The lens has a center thickness of 3.3mm and an edge thickness of 2.31mm, providing a robust and durable structure. The front and back radii of the lens are 36.65mm and -36.65mm respectively, creating a double-convex shape that focuses light effectively. The back focal length of the lens is 34.9mm, and the effective focal length is 36mm, providing a wide field of view and excellent image quality.