22-781 12.5mm Dia. Germanium Infrared Aspheric Lens; EFL=25mm; NA=0.25 BBAR 8-12µm

This is a high-quality 12.5mm diameter Germanium Aspheric Lens, catalog number 22-781, available from the renowned optical components vendor, Edmund Optics. The lens is specifically designed for infrared applications, with a wavelength of 8000 nanometers.

The lens features a focal length of 25mm, indicated by the EFL (Effective Focal Length) value, and a numerical aperture of 0.25, which is ideal for capturing and transmitting light. The aspheric design of the lens helps to minimize spherical aberration, ensuring superior image quality.

The lens is made from Germanium burnett, a high-refractive index material that is commonly used in infrared optics due to its excellent transmission properties in the infrared spectrum. The lens is coated with BBAR (Broadband Anti-Reflection) coating, which further enhances its transmission capabilities, reducing losses and increasing the efficiency of the system.

The lens has a thickness of 2.74mm at the edge and 3mm at the center, providing robustness and durability. The inner and outer radii are 0, indicating a circular shape. The front and back surfaces of the lens are coated with "edm arcedgermanium81", a specialized coating that further enhances the lens' performance in the infrared spectrum.

The lens is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. With its superior specifications and high-quality construction, this lens is an excellent choice for any infrared optical system.