21-933 25mm Dia. UVFS Aspheric Lens; EFL=100mm; NA=0.11 UV-VIS 250-700nm

The 21-933 is a high-performance aspheric lens, designed and manufactured by Edmund Optics, a leading provider of optical components. This lens boasts a 25mm diameter and a numerical aperture (NA) of 0.11, making it suitable for a wide range of applications within the UV-VIS spectrum, specifically between 250 and 700nm.

The lens is constructed from HPFS7980 Corning, a high-quality fused silica material known for its excellent optical properties and durability. This material ensures high transmittance and low autofluorescence, making it ideal for applications that require high precision and clarity.

The lens features an effective focal length (EFL) of 100mm, which is the distance from the lens's center to the focal point where light rays converge. This EFL makes the lens suitable for use in imaging systems, beam shaping, and other applications that require precise light control.

The lens's geometry is another notable feature. It has an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 3.85mm. The center thickness is 5.5mm, and the lens has a conic constant of -0.67. These specifications contribute to the lens's high performance and versatility.

The lens is coated with the EDM UV-VIS STD curve on both the front and back surfaces. This coating enhances the lens's durability and optical performance, reducing surface reflections and increasing transmittance.