89-613 25mm Dia. Germanium Infrared Aspheric Lens; EFL=50mm; NA=0.25 BBAR 3-12µm

The 89-613 is a high-quality aspheric lens, designed and manufactured by Edmund Optics, a leading global supplier of optical components. This lens boasts a 25mm diameter and is specifically engineered for use in the infrared spectrum, with a wavelength of 4000µm.

The lens is constructed from germanium burnett, a material known for its excellent transmission properties in the infrared region. It features a focal length of 50mm, indicated by the EFL (Effective Focal Length) parameter, and a numerical aperture of 0.25, denoted by NA. The aspheric design of the lens helps to minimize spherical aberration, ensuring superior image quality.

The lens is coated with BBAR (Broadband Anti-Reflection) coating, which enhances its transmission capabilities across the 3-12µm range. This coating reduces surface reflections, thereby improving the overall efficiency and performance of the lens.

The geometry of the lens is precisely defined, with an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 2.45mm. The thickness at the center is 3mm, and the lens has a front diameter of 0mm. The lens's front and back surfaces are coated with "edm arcedgermanium31", a specialized coating that further enhances its performance in the infrared spectrum.

The lens is currently in stock and available for immediate purchase through the provided weblink. With its superior design, quality materials, and advanced coatings, the 89-613 is an excellent choice for a wide range of infrared optical applications.