AC127-030-AB 12.7 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=30mm 400-1100nm

The AC127-030-AB is a high-quality unmounted achromatic doublet lens, designed and manufactured by Thorlabs. This lens boasts a 12.7 mm diameter and is specifically engineered for use within the 400-1100nm wavelength range, making it suitable for a wide array of optical applications.

The lens is constructed from two types of materials: N-BK7 and N-SF2, both sourced from Schott. These materials are renowned for their excellent optical properties, contributing to the lens's high performance. The lens features a focal length of 30mm (EFL), achieved through a complex geometry that includes an inner radius of 0, an outer radius of 0, and radii of curvature (r1, r2, r3) of 16.7mm, -13.8mm, and -52.1mm respectively.

The lens is coated with Thorlabs' proprietary anti-reflection (AR) coating, both on the front and back surfaces. This coating, designated as THo AB ACHROMATIC AR, significantly reduces surface reflections, thereby enhancing the lens's transmission efficiency and overall optical performance.

The lens's thickness varies, with an edge thickness of 3.3mm, a center thickness of 4mm for the first surface, and a center thickness of 1mm for the second surface. Despite its complex design and high-quality materials, the lens remains lightweight and easy to handle, making it a versatile choice for various optical setups.