The use of aspherical lenses is an interesting way of reducing the number of optical elements in a system. A properly machined aspherical lens surface can cancel out or reduce the level of spherical aberrations. As a result, more energy can be concentrated in a more limited area. Aspherical lenses are ideally suited to low F/n applications. Optical Surfaces specializes in producing high-quality aspherical lenses for a wide range of end-users, particularly in research and high-power lasers.
Applications include beam focusing, beam collimators, beam expanders, wavefront correction and the simplification of optical assemblies.
Specifications for aspherical lenses include diameters up to 600 mm, non-circular shapes, wavefront accuracy down to λ/20 P-V at 633 nm, surface quality of 10/5, microroughness typically less than 1.2 nm RMS, a wide range of coatings available, as well as an engineering and assembly service.