The AL75150-B is a high-precision aspheric lens, meticulously crafted by Thorlabs. This lens boasts a 75 mm diameter and is designed for use with a wavelength of 780 nm. It is constructed from n-BK7 Schott, a material renowned for its excellent optical properties.
The lens features an effective focal length (EFL) of 150 mm, making it suitable for a wide range of optical applications. The aspheric design, combined with CNC polishing, ensures high-precision performance. The lens's shape is defined by a series of radii (r1: 76.68, r2: 0), thicknesses (edge: 5.7 mm, center: 15 mm), and aspheric coefficients (k1: -0.675, a2 front: 0, a4 front: 2.7709219e-08, a6 front: 6.418186e-13, a8 front: -1.5724014e-17, a10 front: -2.7768768e-21, a12 front: -2.590162e-25, a14 front: 0, a16 front: 0).
The lens's numerical aperture (NA) is 0.23, indicating a wide acceptance angle and high light-gathering capability. The lens is coated with broadband anti-reflection (AR) coatings, optimized for the 650-1050 nm range, which minimizes surface reflections and enhances transmission.