23-013 20mm Dia. N-SF6 Precision Aspheric Lens; EFL=15mm; NA=0.67 SWIR-Plus 900-1700nm

The 23-013 is a high-precision aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 20mm diameter and a numerical aperture (NA) of 0.67, making it a versatile choice for a wide range of applications. The lens is crafted from N-SF6 Schott, a high-refractive index material that ensures excellent optical performance.

The lens features an effective focal length (EFL) of 15mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. This EFL makes the lens suitable for use in compact optical systems where space is at a premium.

The 23-013 lens is coated with Edmund Optics' SWIR-Plus coating, which is designed to enhance performance in the short-wave infrared (SWIR) region of the spectrum, specifically between 900nm and 1700nm. This coating ensures high transmission and low reflectance, making the lens ideal for use in SWIR imaging systems.

The lens geometry is also a notable feature. It has a center thickness of 12.42mm and an edge thickness of 7.97mm, providing robustness and durability. The lens's front and back surfaces are aspheric, with radii of curvature of 12.078mm and 0mm, respectively. This aspheric design helps to reduce spherical aberration, improving the overall image quality.