17-011 50mm Dia. N-SF5 Precision Aspheric Lens; EFL=37.5mm; NA=0.66 SWIR-Plus 900-1700nm

The 17-011 is a high-precision aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 50mm diameter and a numerical aperture (NA) of 0.66, making it a versatile choice for a variety of applications. The lens is constructed from N-SF5 Schott material, a high-refractive index glass that is well-suited for use in the shortwave infrared (SWIR) region, specifically between 900 and 1700nm.

The lens features an effective focal length (EFL) of 37.5mm, which is the distance from the lens's principal point to its focal point. This EFL, combined with the lens's high NA, allows for a wide field of view and high light-gathering capability. The lens also has a high refractive power, which can be utilized to reduce the overall size and weight of optical systems.

The 17-011 lens is coated with Edmund Optics' SWIR-Plus 900-1700nm coating on both the front and back surfaces. This coating is designed to enhance the lens's performance in the SWIR region, improving transmission and reducing reflectance. The coating also provides protection against environmental factors, such as dust and moisture, thereby increasing the lens's durability and lifespan.

In terms of geometry, the lens has a center thickness of 21.34mm and an edge thickness of 7.47mm. The front and back radii of curvature are 25.226mm and 0mm, respectively. The lens also has a conic constant of -1.187653, which contributes to its aspheric shape and helps to correct spherical aberration.