49-495 25mm Dia. x 125mm FL; NIR I Coated; Double-Convex Lens NIR I 600-1050nm

The 49-495 is a high-quality double-convex lens, designed and manufactured by Edmund Optics, a leading global provider of optical components. This lens boasts a diameter of 25mm and a focal length of 125mm, making it suitable for a wide range of applications.

The lens is constructed from N-BK7 Schott, a popular optical glass known for its excellent optical properties and versatility. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature of 128.65mm and -128.65mm for the first and second surfaces, respectively. This geometry results in a back focal length of 123.84mm.

The lens is coated with Edmund Optics' NIR I standard curve coating on both the front and back surfaces. This coating is specifically designed for use in the near-infrared region, covering the wavelength range of 600-1050nm. It provides improved transmission and reduced reflection, enhancing the overall performance of the lens in its intended application.

The lens has a thickness of 2.28mm at the edge and 3.5mm at the center. The inner and outer radii are both 0mm, indicating a uniform curvature across the lens surface. The lens's effective focal length (EFL) is 125mm, which is the distance from the lens's secondary focal point to the lens center.