Patent ID: 7508564
Filing Date: 2009-03-24
Classification: B41J,G02B

Abstract:
1. A scanning optical apparatus comprising: a first lens system for converging a beam light outputted from a prescribed light source which outputs a beam light; a bean light scanner for scanning said beam light on a prescribed scanning surface as reflecting said beam light on or near a converging point of said beam light defined by said first lens system; and a second lens system for converging said beam light scanned by said beam light scanner in a sub scanning direction intersecting at least with a traveling direction of said beam light and a main scanning direction of said beam light on said scanning surface, wherein said second lens system comprises a magnifying lens for magnifying said beam light in said sub scanning direction, being arranged in the side of said beam light scanner, and an aspherical surface lens for converging said beam light in said sub scanning direction on said scanning surface, arranged in the side of said scanning surface, wherein a cross section of a beam light incidence surface and/or an outputting surface along the sub scanning direction is formed as an aspherical surface shape.