13-504 30mm Dia. S-LAH64 NIR Aspheric Lens; EFL=26mm; NA=0.58 Uncoated

This is the 13-504 model from Edmund Optics, a 30mm diameter, uncoated NIR (Near-Infrared) precision asphere lens. The lens is designed for a wavelength of 780nm and has a high numerical aperture (NA) of 0.58, making it suitable for applications that require high light-gathering capabilities and high-resolution imaging.

The lens geometry is defined by its inner and outer radii, both of which are 0mm, indicating a flat surface. The lens has a diameter of 30mm and a thickness of 3.82mm at the edge. The effective focal length (EFL) is 26mm, which is the distance from the lens's principal point to its focal point. The lens's front surface has a radius of curvature (R1) of 20.2mm and a back focal length (BFL) of 20.57mm. The center thickness of the lens is 9.65mm.

The lens's shape is aspheric, meaning it has a surface profile that deviates from a simple spherical shape. This design allows for the correction of spherical aberration, coma, and other optical aberrations, resulting in improved image quality. The lens's conic constant (k1) is -0.975, indicating a mild asphericity.

The lens does not have any coating, as indicated by the empty 'coating' parameter in the item data. This means that the lens will not have any additional protection or enhancement features, such as anti-reflective coatings or scratch-resistant coatings.