PAC089 50.8 mm Dia. N-BK7/N-SF5 Visible Achromatic Doublet; EFL=300mm MgF2 400-700nm

The PAC089 is a high-quality achromatic doublet lens, designed and manufactured by MKS/Newport. This lens is specifically engineered for use in the visible light spectrum, with a coating optimized for the 400-700nm range. The lens is designed with a base shape that is circular, adding to its versatility in various optical systems.

The lens has a diameter of 50.8mm, making it suitable for a wide range of applications. The thickness of the lens at the edge is 11.4mm, providing a robust structure while maintaining a reasonable weight. The lens has an effective focal length (EFL) of 300mm, making it ideal for use in telephoto lenses or other applications where a long focal length is required.

The lens is composed of two materials, N-BK7 and N-SF5, both from Schott. These materials are chosen for their excellent optical properties, particularly their low dispersion, which helps to minimize chromatic aberration. The lens features a complex geometry, with three radii of curvature (r, r1, and r2) and three different thicknesses (thickness edge, thickness center 1, and thickness center 2). This complex geometry allows for precise control of the lens's optical properties.

The lens is coated with MgF2 on both the front and back surfaces. This coating is designed to reduce reflection and increase transmission, improving the overall efficiency of the lens. The coating is specifically designed for use in the visible light spectrum, further enhancing the lens's performance in its intended application.