AL50100 50 mm Dia. N-BK7 High-Precision Aspheric Lens with EFL=100 mm and NA=0.24 Uncoated

The AL50100 is a high-precision asperic lens offered by Thorlabs, boasting a 50 mm diameter and a catalog number of AL50100. This lens is designed for use with a wavelength of 780 nm and is crafted from N-BK7 Schott glass, a material known for its excellent optical properties. The lens's geometry includes an inner radius of 0, an outer radius of 0, a thickness edge of 3.8 mm, and a center thickness of 10 mm.

The asphere of this lens is defined by its radius of curvature (R1) of 51.12 mm, a conic constant of -0.575, and aspheric coefficients (A2 to A16) of varying degrees. These coefficients are crucial in defining the shape of the lens, which deviates from a simple spherical form to provide superior optical performance. The lens's effective focal length (EFL) is 100 mm, and its numerical aperture (NA) is 0.24.

This lens is uncoated, meaning it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means the lens is more cost-effective and suitable for applications where such coatings are not necessary. The lens's status is currently in stock, according to the vendor's website.