62-478 6.25 mm Dia. N-BAF10/N-SF10 Negative Achromatic Doublet; EFL=-10mm VIS 0° 425-675nm

The 62-478 is a high-quality negative achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens boasts a 6.25 mm diameter and a focal length of -10mm, making it ideal for a wide range of applications that require precise optical performance.

The lens is constructed from two types of Schott glass, N-BAF10 and N-SF10, which are known for their excellent optical properties. The negative achromatic design helps to correct chromatic aberration, a common issue in optical systems, ensuring sharp and clear images across the visible spectrum (425-675nm).

The lens features a standard curve coating on both the front and back surfaces, specifically the EDM VIS-0 std curve. This coating enhances the lens's light transmission capabilities and provides protection against environmental factors, further enhancing its performance and durability.

The geometry of the lens is carefully designed to optimize its optical performance. It has a thickness of 4.19mm at the edge, with the inner and outer radii being 0mm. The center thickness is 1mm, and the first radius of curvature (r1) is -6.55mm, while the second radius (r2) is 5.1mm. The lens also has a third radius (r3) of 89.1mm, which contributes to its overall optical properties.