39-504 12.7mm Dia. ZnSe Aspheric Lens; EFL=6.35mm; NA=1 BBAR 8-12µm

The 39-504 is a high-quality aspheric lens, boasting a 12.7mm diameter and a focal length of 6.35mm, specifically designed for use in the 8-12µm spectral range. This lens is sourced from the reputable vendor, Edmund Optics, and is available for purchase directly from their website.

The lens is crafted from ZnSe (Zinc Selenide), a material well-known for its excellent optical properties, particularly in the infrared spectrum. The aspheric design of the lens allows for superior image quality, minimizing spherical aberration and distortion often associated with traditional spherical lenses.

The lens features a high numerical aperture (NA) of 1, indicating its ability to gather and focus light efficiently, making it ideal for applications requiring high resolution and contrast. The front and back surfaces of the lens are coated with BBAR (Broadband Anti-Reflection) coatings, specifically designed for the 8-12µm range. These coatings reduce surface reflections, thereby increasing transmission and improving overall system performance.

The lens has a center thickness of 4mm and an edge thickness of 1.89mm, providing robustness and durability. The front and back faces of the lens are flat, with the front face having a very slight negative curvature (r1=8.909) and the back face being planar (r2=0).