AC127-050-AB 12.7 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=50mm 400-1100nm

The AC127-050-AB is an unmounted achromatic doublet lens, sourced from Thorlabs, designed for use within the 400-1100nm wavelength range. This lens boasts a 12.7 mm diameter and an effective focal length (EFL) of 50mm, making it suitable for a wide range of optical applications.

The lens is composed of two elements, made from N-BK7 and N-SF2 Schott glass, which have been carefully selected and arranged to minimize chromatic aberration. Both the front and back surfaces of the lens are coated with Thorlabs' AB Achromatic AR coating, further enhancing its performance by reducing surface reflections and improving transmission.

The lens geometry is characterized by a 5mm edge thickness, 4mm center thickness for the first element, and 2mm center thickness for the second element. The lens does not have an inner or outer radius, and the first and second radii of curvature are 26.3mm and -22.6mm respectively, while the third radius of curvature is -102.4mm.

This lens is a multiplet, meaning it is composed of multiple elements, and is circular in shape. It is unmounted, providing users with the flexibility to integrate it into their existing optical systems or mount it using their preferred method. The lens's catalog number is AC127-050-AB, and it is currently in stock, according to Thorlabs' website.