A light beam deflection scanning method including the steps of: (a) finding data for cancelling distortion of a scanning track to be made on a surface of an object by a light beam focussed on the surface by a scanning lens, the distortion being caused by the lens; (b) directing the light beam at the...http://www.google.de/patents/US4946234?utm_source=gb-gplus-sharePatent US4946234 - Light beam deflection scanning method and an apparatus therefor
