63-657 40mm Dia. x 120mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm

The 63-657 is a high-quality double-convex lens, boasting a 40mm diameter and a focal length of 120mm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is readily available for your optical system needs.

The lens is crafted from the renowned N-BK7 glass, a material known for its excellent optical properties. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature R1 and R2 being 122.83mm and -122.83mm, respectively. This geometry results in a beneficial effect of reducing spherical aberration, thereby enhancing the image quality.

The lens's edge thickness measures 3.72mm, while the center thickness is 7mm, providing robustness and durability. The effective focal length (EFL) is 120mm, and the back focal length (BFL) is 117.67mm. The lens has no inner or outer radius specified, indicating a uniform curvature throughout.

The 63-657 lens comes with a standard NIR I coating on both the front and back surfaces. This anti-reflective coating is designed for the 600-1050nm wavelength range, ensuring optimal performance in near-infrared applications. The coating helps minimize surface reflections, thereby increasing transmission and improving overall system efficiency.