1. A raster scanning system for providing a video type image including parallel linear scan image elements, the improvement including: a rotating scanning disc including a circular array of concave reflectors on a plane surface thereof; an imaging means configured to coincide with the scanning sweep of the concave reflectors and separated from said concave reflectors by a distance equal to the focal length of said concave reflectors; and radiation emitting means positioned to emit radiation at a controlled intensity toward said array of concave reflectors to form a linear scanning image redirected from said imaging means.