PAC074 38.1 mm Dia. N-BAF10/N-SF10 Visible Achromatic Doublet; EFL=125mm MgF2 400-700nm

The PAC074 is a high-quality optical lens from MKS/Newport, designed for use in the visible spectrum, specifically between 400-700nm. This lens is a doublet, meaning it is composed of two separate lenses made from different materials to optimize its optical performance.

The lens features a 38.1 mm diameter and an effective focal length (EFL) of 125mm. The EFL is a critical parameter in lens selection, as it determines the lens's magnification power. A longer EFL, like the one in the PAC074, provides a narrower field of view and higher magnification.

The doublet is composed of two materials: N-BAF10 and N-SF10, both from Schott. These materials are chosen for their excellent optical properties, including high transparency and low dispersion. The lens also features a coating of MgF2 on both the front and back surfaces. This coating reduces reflection and increases transmission, enhancing the lens's overall performance.

The PAC074's geometry is carefully designed to optimize its optical performance. It has a center thickness of 12.4mm, with individual center thicknesses of 9.2mm and 3.2mm for the first and second elements, respectively. The lens also has a curvature radius of 87.78mm for the first surface and -52.752mm and -484.254mm for the first and second surfaces of the second element, respectively.