22-782 12.5mm Dia. Germanium Infrared Aspheric Lens; EFL=37.5mm; NA=0.16 BBAR 8-12µm

This is a high-quality 12.5mm diameter germanium aspheric lens, model number 22-782, sourced from the renowned optical vendor, Edmund Optics. The lens is specifically designed for infrared applications, with a wavelength of 8000 nanometers, and features a broadband anti-reflection (BBAR) coating suitable for the 8-12µm spectral range.

The lens boasts an effective focal length (EFL) of 37.5mm, providing a good balance between field of view and focus. It has a numerical aperture (NA) of 0.16, which contributes to its light-gathering capability and resolution. The lens is constructed from germanium burnett, a material known for its excellent transmission properties in the infrared spectrum.

The lens geometry is also noteworthy, with an inner radius of 0mm and an outer radius of 0mm. The aspheric design helps to minimize spherical aberration, improving the overall image quality. The lens has a thickness of 2.83mm at the edge and 3mm at the center, providing structural rigidity.

The lens is coated with "edm arcedgermanium81" on both the front and back surfaces, which reduces reflection and increases transmission. This coating is specifically designed for infrared applications, enhancing the lens' performance in its intended use.