65-549-INK 9 mm Dia. N-BASF64/N-SF66 Achromatic Doublet; EFL=9mm MgF2 400-700nm

The 65-549-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 9 mm, is designed for use in the spectral range of 400-700 nm, making it suitable for a wide range of optical applications.

The lens is constructed from two types of Schott glass, N-BASF64 and N-SF66, which are renowned for their excellent optical properties. The use of these materials ensures high light transmission and minimal chromatic aberration. The lens is also coated with EDM MgF2 std curve on both the front and back surfaces, further enhancing its performance by reducing reflection and increasing transmission.

The geometry of the lens is carefully designed to optimize its performance. The effective focal length (EFL) is 9 mm, and the lens has a center thickness of 6.35 mm. The edge thickness is 5.73 mm, and the lens features three radii of curvature: r1 is 6.87 mm, r2 is -5 mm, and r3 is -14.16 mm. The inner and outer radii are both 0 mm.

This lens is a multiplet, meaning it is composed of multiple elements. The base shape is circular, and the lens is available in stock, according to the vendor's website. The catalog number for this lens is 65-549-INK, and it can be found on the Edmund Optics website, along with more detailed specifications and purchasing information.