Patent RE40109 was granted and assigned to RICOH COMPANY,LTD. on February, 2008 by the United States Patent and Trademark Office.
A multi-beam optical scanner, in which a lateral magnification β in a composite system of an optical system between the light source for a multi-beam and the scanned surface satisfies the condition: 2<β≦8.5, and a plurality of light spots on the scanned surface execute optical scanning of the scanning lines adjacent to each other.