AL5040-B 50 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=40 mm; NA=0.55 AR 650-1050nm

The AL5040-B 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 features a high numerical aperture (NA) of 0.55, making it suitable for applications requiring high light-gathering capabilities.

The lens's aspheric design significantly reduces spherical aberration, a common issue in traditional spherical lenses. This results in improved image quality and increased efficiency in light transmission. The lens is CNC polished, ensuring superior surface quality and accuracy.

The AL5040-B comes with anti-reflection (AR) coatings on both the front and back surfaces, specifically designed for the wavelength range of 650-1050 nm. These coatings minimize surface reflections, thereby enhancing transmission and reducing unwanted back reflections.

This lens is available for immediate purchase and is currently in stock on Thorlabs' website. The provided weblink leads directly to the product page for easy access and further information.