32-317 12.5 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=50mm MgF2 400-700nm

The 32-317 is a high-quality achromatic doublet lens, sourced from the renowned optical components manufacturer, Edmund Optics. This lens is designed with a 12.5 mm diameter and a focal length of 50mm, making it suitable for a wide range of optical applications.

The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott. This combination is strategically chosen to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light to the same point, delivering sharp and clear images.

The lens features a standard MgF2 coating on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, particularly in the 400-700nm spectral range. The coating also provides protection against environmental factors, ensuring the longevity of the lens.

The lens geometry includes a thickness of 4.06mm at the edge, with the center thickness being 3.5mm. The lens also features a curvature radius of 30.73mm and -22.32mm on the first and second surfaces, respectively, and -64.75mm on the third surface. The lens is designed to be a multiplet, which means it is composed of multiple elements to achieve superior optical performance.