87-984 12.5mm Dia. UVFS Aspheric Lens; EFL=12.5mm; NA=0.5 UV-VIS 250-700nm

The 87-984 is a high-quality aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 12.5mm diameter and a numerical aperture (NA) of 0.5, making it suitable for a wide range of applications. The lens is made from UV-fused silica, a material known for its excellent transparency across the UV-VIS spectrum, spanning from 250 to 700nm.

The lens features a focal length (EFL) of 12.5mm, which is the distance from the lens's principal point to the point where light rays converge. This makes the lens ideal for applications that require a tight focus or magnification. The lens also has a high refractive index, which allows for a more compact design and reduces spherical aberration.

The 87-984 lens comes with a standard UV-VIS coating on both the front and back surfaces. This coating enhances the lens's transmission in the UV-VIS range, reduces surface reflections, and protects the lens from environmental contaminants.

The lens has a robust design, with a thickness of 1.98mm at the edge and 6mm at the center. The front surface of the lens has a radius of curvature (R1) of 5.731mm, while the back surface (R2) is flat. The lens's aspheric design helps to correct spherical aberration and field curvature, providing sharper images over a larger field of view.