LD7902-E3 25.4 mm Dia. ZnSe Double-Concave Lens; EFL=-200mm 7-12µm

The LD7902-E3 is a high-quality double-concave lens from Thorlabs, designed for use in the mid-infrared spectrum with a wavelength of 10600 nm. This lens is fabricated from ZnSe (Zinc Selenide) material, specifically the ZnSe CONNOLLY variant, known for its excellent transmission properties in the infrared region.

The lens features a base shape of a circle with a diameter of 25.4 mm and a center thickness of 2 mm. It has a double-concave geometry, with radii of curvature of -561.6 mm for the first surface and 561.6 mm for the second surface. The effective focal length (EFL) of this lens is -200 mm, making it suitable for a variety of imaging and beam manipulation applications.

The LD7902-E3 comes with a broadband anti-reflection coating, specifically the THo E3ZnSeARC7000-120 coating, on both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and minimizing losses.

Please note that the lens does not have any specified inner or outer radii. This information is not provided in the item data.

This lens is a part of Thorlabs' extensive catalog and is available for purchase through their website, where you can find more detailed specifications and compatibility information. The link to the product page is provided in the item data for your convenience.