LC7759-E2 25.4 mm Dia. ZnSe Plano-Concave Lens; EFL=-25.4mm 4.5-7.5µm

The LC7759-E2 is a 25.4 mm diameter Plano-Concave Spherical Lens, designed and manufactured by Thorlabs. This lens is specifically engineered for use in the infrared spectrum, with a wavelength of 10600 nm, making it suitable for a wide range of applications in this region.

The lens is made from ZnSe (Zinc Selenide), a material with a high refractive index and excellent transmission properties in the infrared. The lens features a plano-concave geometry, with a center thickness of 2 mm and an effective focal length (EFL) of -25.4 mm. This geometry, combined with the ZnSe material, provides excellent optical performance in the infrared.

The LC7759-E2 is coated with Thorlabs' E2 ZnSe AR Coating, which is designed for use in the 4.5-7.5 µm region. This coating enhances the lens's performance by reducing surface reflections, thereby improving transmission and reducing losses.

The lens is available for purchase directly from Thorlabs, and according to the vendor's website, it is currently in stock. The product's webpage provides further details and specifications, making it a valuable resource for those considering this lens for their optical system.