Scanning a Focused Light Beam Over a Wide Flat Field

Abstract

Two front surface mirrors are positioned to intercept the input laser beam and to scan it over field AB. Lens L is positioned in the beam’s path and focuses the beam on a screen or recording medium. Mirrors M1 and M2 are oscillating or continuously rotating in a synchronized manner but the speed of rotation of M1 is double that of M2. The axis of rotation of M1 is equidistant from that of M2 and the center of lens L.