48-935 6mm Dia. x -9mm FL; MgF2 Coated; Double-Concave Lens 400-700nm

The 48-935 is a double-concave lens with a 6mm diameter and a focal length of -9mm, making it a negatively powered lens. This lens is sourced from Edmund Optics, a reputable vendor in the optical industry. The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence.

The lens features a magnesium fluoride (MgF2) coating on both the front and back surfaces. This coating is standard and provides a broadband anti-reflection performance, reducing surface reflections to less than 1% over the 400-700nm wavelength range. This coating enhances the lens's transmission, making it suitable for various applications, including imaging, beam shaping, and laser systems.

The lens's geometry includes a thickness of 1.79mm at the edge and 1mm at the center, with an effective focal length (EFL) of -9mm. The first and second radii of curvature are -9.47mm and 9.47mm, respectively, and the back focal length (BFL) is -9.32mm. The lens's base shape is circular, and its shape is spherical, which is common in optical systems due to its ease of manufacturing and high optical quality.