16-961 25mm Dia. N-SF6 Precision Aspheric Lens; EFL=18.75mm; NA=0.66 VIS-EXT Plus 350-700nm

This is the 16-961 model from Edmund Optics, a high-precision aspheric lens with a 25mm diameter and a numerical aperture of 0.66. The lens is designed for use within the visible light spectrum, specifically between 350 and 700nm.

The lens is made from N-SF6 Schott, a high-refractive index glass that is often used in optical applications requiring high precision and low dispersion. The aspheric design of the lens helps to reduce spherical aberration, a common issue in traditional spherical lenses, resulting in improved image quality and resolution.

The lens has an effective focal length (EFL) of 18.75mm, which is the distance from the center of the lens to the point at which light rays converge. This EFL makes the lens suitable for a variety of applications, including imaging systems, beam shaping, and laser applications.

The lens also features a broadband anti-reflection coating, specifically the EDM VISPlus 350-700nm coating, which is designed to reduce surface reflections and increase transmission efficiency. This coating ensures that the maximum amount of light passes through the lens, improving the overall performance of the optical system.

The lens has a center thickness of 13.5mm and an edge thickness of 7.97mm, providing structural integrity and resistance to deformation. The front and back surfaces of the lens are coated with the same broadband anti-reflection coating, ensuring optimal performance from both sides of the lens.