16-969 50mm Dia. N-SF5 Precision Aspheric Lens; EFL=37.5mm; NA=0.66 VIS-EXT Plus 350-700nm

The 16-969 is a high-precision aspheric lens, boasting a 50mm diameter and a numerical aperture (NA) of 0.66. This lens is designed for use within the visible light spectrum, specifically between 350-700nm. The lens is crafted from N-SF5 Schott, a high-refractive index glass, and features a high level of precision, making it ideal for applications that require superior image quality and minimal aberration.

The lens has an effective focal length (EFL) of 37.5mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. This EFL, combined with the lens's high NA, allows for a wide field of view and high light-gathering capability.

The 16-969 features an aspheric surface on both sides, with radii of curvature of 25.226mm and 0mm, respectively. This asphere design helps to correct spherical aberration, a common issue in spherical lenses that can lead to distorted or blurry images. The lens also has a center thickness of 21.34mm and an edge thickness of 7.47mm, contributing to its robust construction and high optical performance.

The lens is coated with Edmund Optics' VIS-EXT Plus coating, which is designed to enhance transmission in the 350-700nm range. This coating helps to reduce surface reflections, improving the overall light transmission and enhancing the image quality.