17-321 12.5mm Dia. UVFS Aspheric Lens; EFL=10mm; NA=0.58 Uncoated

The 17-321 12.5mm Dia. UVFS Aspheric Lens is a high-quality optical component sourced from Edmund Optics. This lens is designed with a 12.5mm diameter and a numerical aperture (NA) of 0.58, making it suitable for a wide range of applications. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, its base material, UVFS (Ultra-Violet Fused Silica), provides excellent transparency in the ultraviolet region, making it ideal for use in UV applications.

The lens features an effective focal length (EFL) of 10mm, 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 NA, allows for a relatively wide field of view and high light-gathering capability. The lens also has a high refractive index, which contributes to its ability to bend light effectively.

The geometry of the lens is defined by its inner and outer radii, thickness, and aspheric coefficients. The inner radius is 0, and the outer radius is also 0, indicating that the lens is a plano-convex design. The thickness at the edge is 3.72mm, and the thickness at the center is 9.5mm. The lens's aspheric design, defined by its coefficients k1 and k2, helps to correct spherical aberration, a common issue in traditional spherical lenses.