A280-A 6.5 mm Dia. H-LAK54 Molded Glass Aspheric Lenses; EFL=18.4 mm; NA=0.15 AR 350-700nm

The A280-A is a high-quality aspheric lens from Thorlabs, designed with a 6.5 mm diameter and a focal length of 18.4 mm. This lens is made from H-LAK54 glass, a molded glass material known for its excellent optical properties. The lens features an anti-reflective (AR) coating that covers the wavelength range of 350-700nm, providing improved transmission and reduced reflection.

The lens has a numerical aperture (NA) of 0.15, which is a measure of the light-gathering ability of the lens. A higher NA allows for a wider angle of light collection, making this lens suitable for applications that require high light-gathering capabilities. The lens also has a high refractive index, which contributes to its ability to bend light effectively.

The A280-A's aspheric design helps to reduce spherical aberration, a common optical problem that can lead to distorted images. This design also allows for a more compact and lightweight lens, making it ideal for use in portable or handheld devices.

The lens is currently in stock and available for immediate purchase from Thorlabs' website. With its superior optical performance and robust design, the A280-A is an excellent choice for a wide range of optical applications.