The 69-667 is a 25mm diameter, 100mm focal length plano-convex lens, designed for use in the 8-12µm wavelength range. This lens is sourced from Edmund Optics, a leading provider of optical components.
The lens is made from Germanium burnett, a material known for its excellent transmission properties in the infrared spectrum. The plano-convex geometry, where one side is flat and the other is curved, is ideal for a wide range of applications, including beam shaping and focusing.
The lens features a broadband anti-reflection (BBAR) coating on both the front and back surfaces. This coating, identified as 'edm arcedgermanium81', is specifically designed to reduce surface reflections and increase transmission in the 8-12µm range. The coating also helps to minimize scatter and improve image quality.
The geometry of the lens includes a 2.74mm edge thickness and a 3mm center thickness. The inner and outer radii are both zero, indicating a sharp transition from the flat to the curved surface. The lens has a 300.39mm radius of curvature on the curved side, and a back focal length of 99.25mm.
According to the vendor's information, this lens is currently in stock, making it readily available for immediate use. The detailed specifications and the reliable availability make this lens a valuable addition to any optical system operating in the 8-12µm range.