69-659 50mm Dia. x 75mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm

This 69-659 optical lens, sourced from Edmund Optics, is a 50mm diameter, 75mm focal length plano-convex lens, specifically designed for use in the infrared spectrum with a wavelength of 10600nm. The lens is made from Germanium burnett, a material well-suited for infrared applications due to its high refractive index and transparency in the infrared region.

The lens features a front and back coating of EDM ARCEDGERMANIUM35, a broadband anti-reflection coating that reduces surface reflections and increases transmission in the 3-5µm range. This coating enhances the lens' performance in infrared applications, minimizing losses due to reflection and scattering.

The lens has a base shape of a circle, with a thickness of 2.61mm at the edge and 4mm at the center. The effective focal length (EFL) is 75mm, and the back focal length (BFL) is 74mm. The lens's inner and outer radii are both 0mm, indicating a planar surface on one side and a curved surface on the other.

This lens is an excellent choice for applications that require high transmission and low reflection in the infrared spectrum. Its robust construction and high-quality coating make it suitable for use in various environments, ensuring reliable and consistent performance.