47-650-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS 0° 425-675nm

The 47-650-INK is a high-quality achromatic doublet lens, sourced from Edmund Optics, with a catalog number 47-650-INK. This lens is specifically designed for visible light applications, with a wavelength range of 425-675nm. The lens boasts an effective focal length (EFL) of 400mm, making it suitable for a wide range of optical systems.

The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott. These materials are chosen for their excellent optical properties, contributing to the lens's high performance. The lens features a diameter of 25mm and a thickness of 5.03mm at the edge. The inner and outer radii are 0, and the lens has a center thickness of 3mm and a center thickness 'a' of 2.5mm.

The lens is coated with EDM VIS-0 std curve on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency of the optical system.

The 47-650-INK is available for purchase from the Edmund Optics website, and the link provided is valid and indicates that the lens is in stock. This lens is a multiplet, meaning it is composed of multiple elements, which allows it to correct chromatic aberrations more effectively than a single element lens.