33-958 25mm Dia. UVFS Aspheric Lens; EFL=50mm; NA=0.25 UV-VIS 250-700nm

The 33-958 is a high-quality aspheric lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 25mm, is specifically designed for use in the ultraviolet to visible light spectrum, spanning from 250 to 700nm.

The lens boasts an effective focal length (EFL) of 50mm, making it suitable for a wide range of optical applications. The lens is made from UV fused silica, a material known for its excellent transparency in the UV range. This material is identified in the item data as 'syn hpfs7980 corning', indicating its specific type and origin.

The lens features a high numerical aperture (NA) of 0.25, which allows for a wide angle of acceptance and a greater depth of field. The aspheric design of the lens helps to reduce spherical aberration, improving the overall image quality.

The lens is coated with a standard UV-VIS coating, which is applied to both the front and back surfaces. This coating enhances the lens's transmission in the UV-VIS range, reducing reflections and improving the overall light transmission.

The geometry of the lens is also notable. It has an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 1.61mm. The thickness at the center is 5.13mm, and the back focal length (BFL) is 46.5mm. The lens's shape is defined by its radii of curvature (R1 and R2), which are 22.93mm and 0mm respectively.