Patent ID: 8842149
Filing Date: 2014-09-23
Classification: G02B,G03G,H04N

Abstract:
1. An optical scanning device including: a housing including a first wall portion, a second wall portion intersecting with the first wall portion and extending in a main scanning direction of the laser light emitted from the laser light source, and a housing top directly mounted on top of the first and second wall portions; a laser light source configured to emit laser light; a polygon mirror disposed in an internal space defined by the housing, configured to be driven into rotation and deflect the laser light, thereby allowing the laser light to scan in the main scanning direction; a polygon motor configured to rotate the polygon mirror so that the mirror surfaces sequentially face the first wall portion and then face the second wall portion; an fθ lens disposed between the polygon motor and the second wall portion to extend in a the main scanning direction and configured to refract the laser light deflected by the polygon mirror; and a heat-insulating room insulating heat radiated from the internal space, wherein a recess is formed in the housing top above and along the fθ lens to extend in the main scanning direction and a standing wall is provided in the recess to partition the recess in the main scanning direction into a region close to the first wall portion and a region away from the first wall portion, and the heat-insulating room is formed by covering the region of the recess away from the first wall portion from above with a cover member put on the housing top.