AC508-500-AB 50.8 mm Dia. N-BAK4/N-SF10 Unmounted Achromatic Doublet; EFL=500mm 400-1100nm

The AC508-500-AB is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens is part of Thorlabs' extensive catalog of optical elements, which 3DOptix integrates into its advanced optical simulation software. The lens is unmounted, offering users the flexibility to integrate it into their optical systems according to their specific requirements.

The lens features a 50.8 mm diameter, making it suitable for a wide range of applications. It boasts an effective focal length (EFL) of 500mm, which is consistent across the wavelength range of 400-1100nm. This broad wavelength range makes the lens versatile, suitable for use in various applications, including but not limited to, imaging, beam shaping, and spectroscopy.

The lens is composed of two materials, N-BAK4 and N-SF10, both from Schott. These materials are known for their excellent optical properties, contributing to the lens' high performance. The lens is coated with THo AB Achromatic AR, a coating that further enhances its performance by reducing surface reflections and improving transmission.

The lens' geometry is carefully designed to optimize its performance. It has a thickness of 11.5mm at the edge, with the inner and outer radii being 0. The lens' first surface has a radius of curvature of 230.3, while the second surface has a radius of curvature of -343.9. The lens also has a central thickness of 9mm for the first surface and 4mm for the second surface.