49-767 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=63.5mm MgF2 400-700nm

The 49-767 is a high-quality achromatic doublet lens from Edmund Optics, designed with a 25.4 mm diameter and a focal length of 63.5mm. This lens is a multiplet, meaning it is composed of multiple optical elements to achieve superior performance.

The lens is made from two types of Schott glass, N-SSK8 and N-SF56, which are renowned for their optical properties. The N-SSK8 is used for the first element, while the N-SF56 is used for the second. This combination helps to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.

The lens features a standard MgF2 coating on both the front and back surfaces. This coating is designed to reduce reflection and increase transmission, particularly in the 400-700nm range. The thickness of the lens varies, with an edge thickness of 8.89mm and a center thickness of 8mm. The center thickness reduces to 3.5mm at the lens's edge, providing a gradual transition that can help to minimize optical aberrations.

The 49-767 is currently in stock and available for purchase through the Edmund Optics website. With its high-quality materials, advanced design, and reliable performance, this lens is an excellent choice for a wide range of optical applications.