68-243 25mm Dia. Germanium Infrared Aspheric Lens; EFL=12.5mm; NA=1 BBAR 3-5µm

This is a high-quality 25mm diameter germanium aspheric lens, catalog number 68-243, available from Edmund Optics. The lens is specifically designed for infrared applications, with a wavelength of 4000nm. It boasts an effective focal length of 12.5mm and a numerical aperture of 1, making it a versatile choice for a variety of optical systems.

The lens is made from germanium burnett, a material known for its excellent transmission properties in the infrared spectrum. It features a precision aspheric surface, which helps to reduce spherical aberration and improve image quality. The lens has a thickness of 2.5mm at the edge and 4.24mm at the center, providing robustness and durability.

The lens is coated with BBAR 3-5µm, a broadband anti-reflection coating that enhances transmission and reduces surface reflections. This coating is applied to both the front and back surfaces of the lens, ensuring optimal performance in both transmission and reflection.

The lens is currently in stock and can be purchased directly from the Edmund Optics website. The provided weblink is valid and directs to the product page for easy access and purchase.