<p>A diffractive deflection beam scanning system including a deflection disc (130) rotatably mounted over a plurality of light sources (110-130) wherein the light sources (110-113) are disposed in a straight line along a bisecting line of the deflection disc, perpendicular to the beam scan direction, such that a plurality of scanning beams are reflected from the reflecting mirrors (140-143, 150-153) all having the same scan direction and all avoiding beam asymmetry. <IMAGE></p>
