AC254-040-C-ML 25.4 mm Dia. N-LAK22/N-SF6HT Mounted Achromatic Doublet; EFL=40mm 1050-1700nm

The AC254-040-C-ML is a multiplet lens, specifically an achromatic doublet, with a diameter of 25.4 mm. This lens is designed for use in the spectral range of 1050-1700nm, making it suitable for a wide range of applications in infrared spectroscopy and imaging. The lens is mounted, providing a convenient and ready-to-use solution for your optical system.

The lens is composed of two materials, N-LAK22 and N-SF6HT, both from Schott. These materials are chosen for their excellent optical properties in the infrared region. The lens features a focal length of 40mm, providing a moderate magnification and field of view.

The lens geometry is carefully designed to provide optimal performance. The edge thickness is 7.7mm, while the center thicknesses are 10mm and 1.8mm. The lens has a concave-convex-concave shape, with radii of curvature of 24.4mm, -21.1mm, and -143.9mm. This shape is typical for achromatic doublets, designed to minimize chromatic aberration.

The lens is coated with THo AC1050-1700-C, a broadband antireflection coating that is optimized for the 1050-1700nm range. This coating reduces surface reflections, improving transmission and reducing ghosting and flare.

The lens is available from Thorlabs, a leading vendor of optical components. According to their website, the lens is currently in stock, indicating quick availability for your optical project.