16-979 25mm Dia. N-BK7 Precision Aspheric Lens; EFL=31.25mm; NA=0.4 NIR-Plus 600-1050nm

This is a high-precision aspheric lens, catalog number 16-979, sourced from the renowned optical vendor, Edmund Optics. The lens is designed for use in the near-infrared spectrum, specifically for wavelengths between 600 and 1050 nanometers.

The lens is made from N-BK7, a high-quality borosilicate glass known for its excellent optical properties. It has a base shape of a circle, with a diameter of 25 millimeters. The lens features a high numerical aperture (NA) of 0.4, indicating a wide acceptance angle for light and thus, a high light-gathering capacity.

The lens's geometry is precisely engineered. It has an inner radius of 0 millimeters, an outer radius of 0 millimeters, and a thickness at the edge of 6.3 millimeters. The effective focal length (EFL) is 31.25 millimeters, and the radius of curvature (R1) is 16.15 millimeters. The back focal length (BFL) is 23.67 millimeters, and the thickness at the center is 11.5 millimeters.

The lens is coated with Edmund Optics' NIR-Plus 600-1050nm coating on both the front and back surfaces, enhancing its performance in the near-infrared spectrum. This lens is an excellent choice for applications requiring high-quality imaging or light collection in the near-infrared region.