89-616 50mm Dia. Germanium Infrared Aspheric Lens; EFL=50mm; NA=0.5 BBAR 3-12µm

The 89-616 is a high-quality aspheric lens made from germanium, offering a 50mm diameter and a focal length of 50mm. This lens is specifically designed for infrared applications, with a coating that is optimized for the 3-12µm wavelength range. The lens is manufactured by Edmund Optics, a leading vendor in the optical industry, and is available for purchase through their website.

The lens features a high numerical aperture (NA) of 0.5, which allows for a wide angle of view and increased light gathering capability. The aspheric design of the lens helps to reduce spherical aberration, providing sharper images with improved contrast and resolution. The lens has a thickness of 2.52mm at the edge and 5.1mm at the center, with a clear aperture of 50mm.

The lens is coated with a broadband anti-reflection (BBAR) coating on both the front and back surfaces. This coating helps to reduce surface reflections, improving transmission and reducing ghosting and flare. The coating is specifically designed for the 3-12µm wavelength range, making it ideal for infrared applications.