67-264 15mm Dia. UVFS Aspheric Lens; EFL=12.5mm; NA=0.6 Uncoated

The 67-264 is a 15mm diameter, uncoated UV Fused Silica Aspheric Lens, available from Edmund Optics. This lens is characterized by its high numerical aperture (NA) of 0.6, making it suitable for applications requiring high light-gathering capabilities. The lens's effective focal length (EFL) is 12.5mm, which, combined with its NA, provides a wide field of view and high resolution.

The lens's aspheric design, with a first radius of curvature (R1) of 5.731, contributes to its high performance. Aspheric lenses are known for their ability to reduce spherical aberration, a common issue in traditional spherical lenses. This results in improved image quality, making the 67-264 an excellent choice for imaging applications.

The lens is made of UV Fused Silica, a material with a high transmission range from the ultraviolet to the near-infrared region. This makes it suitable for use in UV applications, such as fluorescence microscopy or UV curing.

The lens's geometry includes a thickness at the edge of 2.47mm and a center thickness of 9mm. The front surface has a very small aspheric departure, with coefficients e0, f0, g0, h0, and j0 all being zero, indicating a near-spherical shape.

The lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means the lens is more resistant to environmental conditions and can withstand harsher handling.