AC508-100-B 50.8 mm Dia. N-LAK22/N-SF6HT Unmounted Achromatic Doublet; EFL=100mm 650-1050nm

The AC508-100-B is a high-quality achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This lens is designed for use in the 650-1050nm spectral range, making it suitable for a wide range of applications in the near-infrared region.

The lens features a 50.8mm diameter and a total thickness of 8.7mm at the edge. The inner and outer radii are 0, indicating a circular geometry. The first radius of curvature (r1) is 65.8mm, the second radius (r2) is -56mm, and the third radius (r3) is -280.6mm. The center thicknesses are 13mm for the first center and 2mm for the second.

The lens is made from two types of Schott glass: N-LAK22 and N-SF6HT. These materials were chosen for their specific refractive indices and dispersion properties, which contribute to the lens's excellent chromatic correction.

Both the front and back surfaces of the lens are coated with Thorlabs' AC650-1050-B coating, which is designed to enhance transmission in the 650-1050nm range. This coating helps to minimize reflection and increase the overall efficiency of the lens.

The lens is unmounted, providing users with the flexibility to integrate it into their own optical systems. It is currently in stock and available for immediate purchase through the Thorlabs website.