22-769 12.5mm Dia. Germanium Infrared Aspheric Lens; EFL=25mm; NA=0.25 Uncoated

This is a high-quality 12.5mm diameter Germanium Aspheric Lens, catalog number 22-769, available from the renowned optical components vendor, Edmund Optics. The lens is specifically designed for infrared applications, with a wavelength of 8000nm.

The lens features an effective focal length (EFL) of 25mm, providing a compact and efficient optical solution. The numerical aperture (NA) is 0.25, indicating a wide acceptance angle and good light-gathering capability. The lens is uncoated, which can be beneficial in certain applications where a specific coating is not required or desirable.

The lens geometry is intricately designed, with an inner radius of 0mm and an outer radius also of 0mm. The thickness at the edge is 2.74mm, and the thickness at the center is 3mm. The first radius of curvature (R1) is 75.168mm, and the second radius of curvature (R2) is 0mm, indicating the aspheric nature of the lens. The back focal length (BFL) is 24.25mm.

The lens is made of Germanium burnett, a material known for its excellent transmission properties in the infrared region. The lens is circular in base shape, making it compatible with a wide range of optical systems.

The lens is available for purchase through the Edmund Optics website, and the link provided is valid and indicates that the lens is in stock, ready for immediate dispatch. This lens is an excellent choice for anyone needing a high-performance infrared aspheric lens.