AL5040-A 50 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=40 mm; NA=0.55 AR 350-700nm

The AL5040-A is a high-precision aspheric lens offered by Thorlabs, designed with a 50 mm diameter and a focal length of 40 mm. This lens is crafted from S-LAH64, a high-quality optical glass from Ohara, ensuring excellent optical performance. The lens's aspheric design helps minimize spherical aberration, providing superior image quality.

The lens's geometry includes an inner radius of 0 mm, an outer radius of 0 mm, a thickness at the edge of 5 mm, and a center thickness of 15.5 mm. The lens's high numerical aperture (NA) of 0.55 enhances its light-gathering capability, making it suitable for applications requiring high resolution and contrast.

The lens features a broadband anti-reflection (AR) coating optimized for the 350-700 nm wavelength range, reducing surface reflections and improving transmission. This coating is applied to both the front and back surfaces of the lens, ensuring optimal performance in various lighting conditions.

The lens is CNC polished, a process that ensures high surface quality and accurate dimensions, making it suitable for use in demanding optical systems. The lens's robust construction and high-quality materials make it an excellent choice for applications in fields such as biomedical imaging, machine vision, and beam shaping.