A260-C 6.5 mm Dia. H-LAK54 Molded Glass Aspheric Lenses; EFL=15.29 mm; NA=0.16 AR 1050-1620nm

The A260-C is a high-quality aspheric lens from Thorlabs, designed with a 6.5 mm diameter and a molded H-LAK54 glass substrate. This lens is specifically engineered for use in the infrared spectrum, with a wavelength of 780 nm, and is coated with a broadband anti-reflective coating suitable for the 1050-1620 nm range.

The lens features an effective focal length (EFL) of 15.29 mm, providing a compact and efficient optical solution. The aspheric design helps to reduce spherical aberration, enhancing the optical performance and ensuring superior image quality. The lens has a front thickness of 1.72 mm and a center thickness of 2.2 mm, contributing to its robustness and durability.

The A260-C's geometry includes a range of parameters that define its optical properties. The front and back surfaces of the lens have been precisely shaped, with radii of curvature (r1 and r2) of 10.99158 mm and 0 mm, respectively. The lens's numerical aperture (NA) is 0.16, indicating a wide acceptance angle and high light-gathering capability.

The lens is coated with a broadband anti-reflective coating on both the front and back surfaces, which significantly reduces surface reflections and increases transmission in the specified wavelength range. This coating enhances the lens's performance in high-power applications, minimizing the risk of thermal effects and optical damage.