87-991 12.5mm Dia. UVFS Aspheric Lens; EFL=10mm; NA=0.63 NIR 600-1050nm

The 87-991 is a high-performance aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 12.5mm diameter and a numerical aperture (NA) of 0.63, making it suitable for a wide range of applications, particularly in the near-infrared (NIR) spectrum of 600-1050nm.

The lens is made from UV-fused silica, a material known for its excellent transparency across a broad spectrum, including the UV and NIR ranges. This material also offers high resistance to thermal shock and environmental degradation, ensuring the lens's durability and longevity.

The aspheric design of the lens provides superior optical performance, reducing spherical aberration and other optical distortions that are common in traditional spherical lenses. This results in sharper images, increased light gathering capability, and a wider field of view.

The lens features an effective focal length (EFL) of 10mm, making it suitable for use in compact optical systems where space is at a premium. The lens has a center thickness of 8mm and an edge thickness of 2.03mm, providing robustness and rigidity.

The lens is coated with Edmund Optics' proprietary NIR coating, designed specifically for the 600-1050nm spectrum. This coating enhances the lens's transmission in this range, reducing reflection and improving overall system efficiency.