Patent ID: 9151930
Filing Date: 2015-10-06
Classification: B29C,B29D,G02B

Abstract:
1. A light scanning apparatus, comprising: a plurality of light sources configured to emit beams based on image information; a deflection section configured to deflect the beams emitted from the light sources; and a plurality of plastic optical element units, each of which is disposed on each side of the deflection section, the plastic optical element units being disposed to face each other, each of the plastic optical element units including a plurality of stacked plastic optical elements, wherein each of the stacked plastic optical elements includes wherein a center of curvature of the curved surface is disposed on the optical axis, wherein the stacked plastic optical elements are stacked so that the optical axis of each of the stacked plastic optical elements is shifted from the respective center of the outer shape of the transfer surface in a same direction, and wherein the optical axes of the stacked plastic optical elements of one of the plastic optical element units disposed on one side of the deflection section are disposed to match with the optical axes of the stacked plastic optical elements of an other one of the plastic optical element units disposed on an other side of the deflection section, the transfer surface of the one of the plastic optical element units being reversely disposed upwardly and downwardly with respect to the transfer surface of the other one of the plastic optical element units.