355660-A 4 mm Dia. D-ZLAF52LA Molded Glass Aspheric Lenses; EFL=3 mm; NA=0.52 AR 350-700nm

The 355660-A is a high-quality aspheric lens, precision-molded from D-ZLAF52LA glass, a unique material with a high refractive index and excellent transmission properties in the visible and near-infrared regions. This lens is designed for use at a wavelength of 1550 nm and features a diameter of 4 mm and a thickness of 1.654 mm at the edge.

The lens's design includes an effective focal length (EFL) of 3 mm, providing a compact solution for imaging and beam shaping applications. The aspheric surface profile, defined by the radii r1 (-2.3055 mm) and r2 (0 mm), corrects for spherical aberration, ensuring superior image quality and light collection. The lens has a numerical aperture (NA) of 0.52, which contributes to its high light-gathering capability and excellent resolution.

The 355660-A lens features an antireflection (AR) coating on both the front and back surfaces, optimized for the 350-700 nm wavelength range. This coating reduces surface reflections, enhancing transmission and minimizing ghosting and flare in optical systems.

This lens is available from Thorlabs and is currently in stock, making it an ideal choice for users seeking a reliable, high-performance optical component for their applications.