21-916 25mm Dia. UVFS Aspheric Lens; EFL=50mm; NA=0.23 UV 250-425nm

The 21-916 25mm Dia. UVFS Aspheric Lens is a high-quality optical component sourced from Edmund Optics. This lens is designed with a base shape of a circle and is constructed from syn hpfs7980 corning, a material known for its durability and optical clarity.

The lens has a diameter of 25mm and a thickness edge of 3.82mm, making it a compact yet robust option for various applications. The effective focal length (EFL) of this lens is 50mm, which is a common choice for many optical systems due to its versatility. The lens also features a numerical aperture (NA) of 0.23, which contributes to its light-gathering capability and overall performance.

The geometry of the lens is precisely engineered, with an inner radius of 0mm and an outer radius of 0mm. The thickness at the center of the lens is 7.2mm, and it has a back focal length (BFL) of 45.1mm. The lens's front surface is coated with edm uv 250-425nm, a coating that enhances its performance in the ultraviolet range of 250-425nm. This coating is also applied to the back surface of the lens for consistent performance.

The lens is classified as an aspheric lens, which means it has a non-spherical surface. This design feature helps to reduce spherical aberration, a common optical issue that can degrade image quality. The lens's shape is defined by its radius of curvature (R1) of 23.80500085936053mm and its conic constant (K1) of -0.663.