68-244 25mm Dia. Germanium Infrared Aspheric Lens; EFL=15mm; NA=0.83 BBAR 3-5µm

This is a 25mm diameter germanium aspheric lens, catalog number 68-244, available from Edmund Optics. The lens has a focal length of 15mm and is coated with BBAR 3-5µm, ensuring high transmission in the infrared spectrum. The lens features a high numerical aperture (NA) of 0.83, indicating a wide acceptance angle and high light-gathering capability.

The lens's geometry includes a 45.37mm radius of curvature (RoC) for the first surface and a flat second surface. The lens has a 14mm back focal length (BFL), providing flexibility in optical system design. The center thickness is 4mm, and the edge thickness is 2.47mm, contributing to the lens's robustness and durability.

The lens is coated with Edmund Optics' proprietary AR coating, edm arcedgermanium35, on both the front and back surfaces. This coating enhances the lens's performance in the infrared region by reducing surface reflections and increasing transmission.

The lens's shape is aspheric, which helps correct spherical aberration and other optical aberrations, providing superior image quality over a wide field of view. This makes the lens suitable for various applications, including infrared imaging, spectroscopy, and beam shaping.

According to the vendor's information, the lens is currently in stock, making it readily available for immediate use in your optical systems. For more detailed information, you can visit the product webpage at https://www.edmundoptics.eu/p/25mm-dia-x-15mm-fl-3-5mum-coated-ge-aspheric-lens/22930/.