67-268 50mm Dia. UVFS Aspheric Lens; EFL=60mm; NA=0.42 Uncoated

The 67-268 50mm Dia. UVFS Aspheric Lens is a high-quality optical component sourced from Edmund Optics. This lens, with a catalog number of 67-268, is designed for use in a variety of applications, particularly where high precision and performance are required.

The lens is made from UV Fused Silica (HPFS7980 Corning), a material known for its excellent transmission properties across a wide range of wavelengths, including the ultraviolet region. This makes the lens suitable for use in UV applications. The lens has a diameter of 50mm and a numerical aperture (NA) of 0.42, indicating a wide acceptance angle and high light-gathering capability.

The lens features an aspheric design, which is characterized by its non-spherical surface. This design helps to reduce spherical aberration, a common optical problem that can lead to distorted or blurry images. The aspheric surface is defined by the parameters r1=-27.508 and k1=-1.471923, which determine the shape and curvature of the lens.

The lens has an effective focal length (EFL) of 60mm, a measure of the distance between the lens and the point at which it focuses light. This, combined with the large NA, makes the lens suitable for use in imaging systems that require a wide field of view and high resolution.

The lens is uncoated, meaning it does not have any additional layers applied to its surface to alter its optical properties. This can be advantageous in certain applications where a natural, unaltered surface is desired. However, it should be noted that uncoated lenses can be more susceptible to surface reflections and may not perform as well in high-light conditions.