AL4532 45 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=32 mm; NA=0.61 Uncoated

The AL4532 is a high-precision aspheric lens, meticulously crafted by Thorlabs. This lens boasts a 45 mm diameter and is constructed from S-LAH64, a high-quality material from Ohara. The lens is designed for use with a wavelength of 780 nm, making it suitable for a wide range of optical applications.

The lens features an effective focal length (EFL) of 32 mm, which is a crucial parameter in lens selection. The EFL, combined with the lens's high numerical aperture (NA) of 0.61, allows for a wide field of view and high light-gathering capability. This makes the AL4532 particularly suitable for applications that require high resolution and high contrast.

The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, this does not detract from its performance in many applications. The lens's geometry is carefully designed, with an inner radius of 0 and an outer radius of 0, ensuring optimal light transmission and minimal distortion.

The lens's thickness varies from 3.2 mm at the edge to 13.9 mm at the center, providing structural rigidity while minimizing unnecessary weight. The lens's aspheric shape, defined by its radii (r1 and r2) and aspheric coefficients (a2 to a16), ensures superior optical performance compared to traditional spherical lenses.