AL5040M 50 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=40 mm; NA=0.55 Uncoated

The AL5040M is a high-precision aspheric lens, measuring 50 mm in diameter, manufactured by Thorlabs. This lens is made from S-LAH64, a high-quality optical glass from Ohara, and features a focal length of 40 mm (EFL), providing a numerical aperture (NA) of 0.55.

The lens's design includes a polished aspheric surface, which helps to reduce spherical aberration, providing superior image quality. The inner radius of the lens is 0, while the outer radius is also 0, indicating a circular shape. The lens has a thickness of 5 mm at the edge and 15.5 mm at the center.

The AL5040M's geometry is defined by several radii (r1, r2), thicknesses (edge, center), and aspheric coefficients (k1, a2, a4, a6, a8, a10, a12, a14, a16). These parameters contribute to the lens's unique optical properties, making it suitable for various applications.

The lens is uncoated, which means it does not have any anti-reflective or other coatings. While this may result in higher reflective losses, it also means that the lens is more cost-effective and versatile, as it can be used in a wide range of wavelengths without the risk of coating damage.

According to the vendor's website, the AL5040M is currently in stock, making it readily available for immediate use. For more information, including technical specifications and purchasing details, please refer to the provided weblink.