The 67-610 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 9mm diameter and a focal length of 18mm, 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 well-known for its excellent optical properties, including high transmittance and low dispersion. This ensures that the lens delivers sharp, clear images with minimal chromatic aberration.
The 67-610 features a unique coating profile, with both the front and back surfaces coated with Edmund Optics' NIR-II standard curve coating. This coating is specifically designed to enhance the lens' performance in the NIR spectrum, improving its transmission and reducing reflections. The result is a lens that delivers superior image quality in the 750-1550nm range.
In terms of geometry, the lens has a center thickness of 2.6mm and an edge thickness of 1.47mm. The front and back radii of curvature are 18.15mm and -18.15mm, respectively, resulting in a back focal length of 17.12mm. The lens' spherical shape ensures excellent focus and minimal distortion.