AL5040M-A 50 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=40 mm; NA=0.55 AR 350-700nm

The AL5040M-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 superior optical performance. The lens's aspheric design helps minimize spherical aberration, providing sharper images compared to traditional spherical lenses.

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 use in brightfield microscopy, laser beam shaping, and other applications requiring high light transmission.

The lens features a broadband anti-reflection (AR) coating, optimized for the 350-700 nm range, which reduces surface reflections, thereby improving transmission and reducing ghosting and flare. This coating is applied to both the front and back surfaces of the lens.

The lens is CNC polished, ensuring excellent surface quality and figure accuracy. This lens is available for immediate shipping, as indicated by its "Valid - in stock" status on the vendor's website. For more detailed specifications and purchasing information, please refer to the provided weblink.