69-657 25mm Dia. x 250mm FL; Coated; Ge Plano-Convex Lens BBAR 3-5µm

The 69-657 is a 25mm diameter, 250mm focal length plano-convex lens made of germanium burnett, sourced from Edmund Optics. This lens boasts a base shape of a circle and a spherical geometry, with a 750.97mm radius on the curved side. The lens has a 2.9mm thickness at the edge and a 3mm thickness at the center, while maintaining a back focal length of 249.25mm.

The lens features a broadband anti-reflection (BBAR) coating on both the front and back surfaces, specifically designed for the 3-5µm wavelength range. This coating significantly reduces surface reflections, thereby increasing transmission and improving overall system performance. The coating is identified as "edm arcedgermanium35" in the item data.

The lens is in stock and available for immediate purchase through the provided weblink. This detailed description aims to provide a comprehensive understanding of the lens's features and specifications, assisting users in their search for similar optical components.