LC7142-E2 25.4 mm Dia. ZnSe Plano-Concave Lens; EFL=-200mm 4.5-7.5µm

The LC7142-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 constructed from ZnSe (Zinc Selenide), a material known for its excellent optical properties in the infrared spectrum. The lens features a plano-concave geometry, with a center thickness of 2 mm and an effective focal length (EFL) of -200 mm. This negative focal length indicates that the lens will diverge light, making it ideal for use in beam expanding or collimating applications.

The lens is coated with Thorlabs' E2 AR Coating, designed for use in the 4.5-7.5 µm range. This coating helps to reduce surface reflections, improving the overall transmission of the lens. The coating is applied to both the front and back surfaces of the lens.

The LC7142-E2 is currently in stock and available for immediate purchase. For more information, including detailed specifications and pricing, please refer to the product webpage on Thorlabs' website.