AL7560-C 75 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=60 mm; NA=0.62 AR 1050-1700nm

The AL7560-C is a high-precision aspheric lens offered by Thorlabs, a leading vendor in the optical industry. This lens, with a diameter of 75 mm, is designed for use with a wavelength of 780 nm and features an effective focal length (EFL) of 60 mm. The lens boasts a high numerical aperture (NA) of 0.62, making it suitable for a wide range of applications.

The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties. The aspheric design of the lens, combined with CNC polishing, ensures high-precision performance. The front and back surfaces of the lens are coated with a broadband anti-reflection coating (AR), optimized for the 1050-1700 nm range, which reduces surface reflections and increases transmission.

The lens has a center thickness of 35.5 mm and an edge thickness of 6.8 mm, providing robustness and durability. The front surface of the lens has a conic constant of -0.905, while the back surface is planar. The lens also features higher-order aspheric coefficients, including a2 front (0), a4 front (1.6365958e-06), a6 front (4.1292991e-10), a8 front (9.3540375e-14), a10 front (2.4530649e-17), a12 front (-4.6067378e-21), and a14 front (5.5772398e-24).