11-409 50.8mm Dia. x 75mm FL; Coated; ZnSe Plano-Convex Lens BBAR 8-12µm

The 11-409 is a Plano-Convex Spherical Lens, sourced from Edmund Optics, boasting a diameter of 50.8mm and a focal length of 75mm. This lens is specifically designed for use with wavelengths of 10.6µm, making it suitable for a range of mid-infrared applications.

The lens is constructed from ZnSe (Zinc Selenide) material, identified as 'znse connolly' in the material database. This material is known for its excellent transmission properties in the infrared spectrum, making it a popular choice for such applications.

The lens features a Broadband Anti-Reflective (BBAR) coating on both the front and back surfaces. This coating, denoted as 'edm dbbarl znse 812', is specifically designed to minimize surface reflections and increase transmission across the 8-12µm spectral range.

The geometry of the lens includes a thickness of 2.39mm at the edge and 5.5mm at the center. The lens has a plano surface on one side and a convex surface with a radius of curvature of 105.2mm on the other. The lens does not have any inner or outer radii.

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