LE7996-F 25.4 mm Dia. ZnSe Positive Meniscus Lens; EFL=75mm 8-12µm

The LE7996-F is a 25.4 mm diameter Spherical Lens with a Positive Meniscus shape, sourced from Thorlabs. This lens is designed for use in the 8-12 µm wavelength range, making it suitable for a variety of mid-infrared applications. The lens features an effective focal length (EFL) of 75mm, which is a common choice for systems requiring moderate magnification.

The lens geometry includes an outer diameter of 25.4 mm, with a center thickness of 4 mm and an edge thickness of 3.5 mm. The front and back radii of curvature are 21 mm and 23.3 mm respectively, resulting in a back focal length (BFL) of 66.6 mm. The lens is made from ZnSe material, specifically the ZnSe CONNOLLY variant, which is known for its excellent transmission properties in the mid-infrared range.

The lens is coated with THo ZnSe-ARCED 8-12, a specialized anti-reflective coating designed for the 8-12 µm wavelength range. This coating helps to minimize surface reflections, improving the overall efficiency and performance of the lens.

Please note that the lens has an inner radius of 0 mm and an outer radius of 0 mm, indicating that it is a circular lens with no special shaping or features on its edges. This lens is currently in stock and available for immediate shipping.