AL1815-B 18 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=15 mm; NA=0.53 AR 650-1050nm

The AL1815-B is a high-precision aspheric lens, meticulously crafted by Thorlabs. This lens, with a diameter of 18 mm, is constructed from S-LAH64, a material from Ohara. The lens is designed to operate at a wavelength of 780 nm, making it suitable for a wide range of applications.

The lens features an effective focal length (EFL) of 15 mm, which is a critical parameter in lens selection. The EFL determines the distance between the lens and the focal point, influencing the overall design and functionality of the optical system.

The AL1815-B boasts a high numerical aperture (NA) of 0.53. The NA is a measure of the light-gathering ability of the lens, and a higher NA allows for greater light collection, leading to improved image quality and resolution.

The lens is coated with a broadband anti-reflection (AR) coating, specifically designed for the 650-1050 nm range. This coating reduces unwanted reflections, enhancing the transmission of light through the lens and improving overall system performance.

The lens is CNC polished, ensuring superior surface quality and accuracy. This level of precision is essential for applications requiring high-resolution imaging or precise light control.