21-924 25mm Dia. UVFS Aspheric Lens; EFL=75mm; NA=0.15 UV 250-425nm

The 21-924 is a high-performance aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 25mm diameter and a numerical aperture (NA) of 0.15, making it suitable for a wide range of applications. The lens is made from HPFS7980 Corning, a material known for its excellent optical properties and durability.

The lens is designed for use with ultraviolet (UV) light, specifically within the wavelength range of 250-425nm. This makes it ideal for applications such as UV spectroscopy, UV curing, and other UV-based processes. The lens has an effective focal length (EFL) of 75mm, which determines the distance at which it focuses light. This EFL, combined with the lens's NA, allows for a relatively wide field of view while maintaining good image quality.

The lens features a unique aspheric design, which helps to correct spherical aberration, a common issue in traditional spherical lenses. This design ensures that the lens delivers sharp, high-contrast images, even when used at wide apertures. The lens also features a UV-AR coating on both the front and back surfaces, which helps to reduce reflection and increase transmission within the UV range.

In terms of physical dimensions, the lens has a thickness of 3.78mm at the edge and 6mm at the center. The front surface of the lens has a radius of curvature of 35.707mm, while the back surface is flat. The lens also has a small amount of wedge, with the front surface being 2.5549e-7mm higher than the back surface.

The 21-924 lens is currently in stock and available for purchase through the Edmund Optics website. With its high-quality materials, advanced design, and excellent optical performance, this lens is an excellent choice for any application that requires high-performance UV imaging.