AC508-300-C 50.8 mm Dia. N-BAF10/N-SF6 Unmounted Achromatic Doublet; EFL=301.4mm 1050-1700nm

The AC508-300-C is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens, with a diameter of 50.8 mm, is specifically engineered for use in the 1050-1700nm wavelength range, making it an ideal choice for a variety of applications in the near-infrared spectrum.

The lens is constructed from two types of Schott glass, N-BAF10 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in lens systems. The front and back surfaces of the lens are coated with Thorlabs' proprietary AC1050-1700-C coating, which further enhances its performance by reducing reflection and increasing transmission in the specified wavelength range.

The lens geometry is characterized by its base shape, which is circular, and its three radii of curvature (r1, r2, and r3), which are 93.8 mm, -112.2 mm, and 280.6 mm, respectively. The lens has a thickness of 9.1 mm at the edge and varies in thickness towards the center, with measurements of 8.5 mm and 3 mm for the first and second center thicknesses, respectively.

The lens is unmounted, providing users with the flexibility to integrate it into their own systems and setups. The information provided here is valid as of the time of writing, and the lens is currently in stock, according to Thorlabs' website.