Illuminator for visual inspection of curved specular surfaces

摘要

An illuminator for providing high contrast illumination of curved surfaces is provided comprising a diffuse spherical reflector having an aperture at its peak. A source of radiant energy distributed along a ring, illuminates the interior of the reflector, which in turn illuminates the curved surfaces situated at the center of a sphere of which the spherical reflector is a part. Light reflected from the curved surfaces is reflected through the aperture.