ACT508-400-A-ML 50.8 mm Dia. N-BK7/N-SF2 Mounted Achromatic Doublet; EFL=400mm 400-700nm

The ACT508-400-A-ML is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens is specifically designed for use in the 400-700nm spectral range, making it suitable for a wide range of applications in the visible spectrum.

The lens features a 50.8mm diameter and has a focal length of 400mm, as indicated by its EFL (Effective Focal Length) value. The lens is constructed from two elements, made from N-BK7 and N-SF2 Schott glass, which are renowned for their excellent optical properties. These materials, combined with the achromatic design, help to minimize chromatic aberration, ensuring high-quality images with minimal color fringing.

The lens has a thickness of 14.1mm at the edge and 8mm at the center. The curvature of the lens surfaces is defined by radii of 292.3mm, -148.9mm, and -398.5mm, which contribute to the lens's excellent optical performance. The lens is coated with Thorlabs' AC400-700-A coating on both the front and back surfaces, further enhancing its performance by reducing reflection and increasing transmission in the 400-700nm range.

The ACT508-400-A-ML is a mounted lens, making it easy to integrate into optical systems. The lens is currently in stock and available for immediate shipping, as indicated by its valid weblink status. For more information, please refer to the provided weblink.