LASER SCANNING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

摘要

A laser scanning device includes light source, deflection portion, image forming lens, a block position setting portion, and a light source control portion. The image forming lens condenses a light beam deflected by the deflection portion on a scanned surface, and causes the light beam to be scanned on the scanned surface in a scanning direction at an equal speed. The block position setting portion sets one or more block areas which each include a plurality of section areas sectioned from each other on the scanned surface in the scanning direction. The light source control portion controls the light source to irradiate the light beam to the plurality of section areas at a plurality of irradiation timings that are determined for each of the block areas. The block position setting portion shifts set positions of the block areas along the scanning direction for each scan of at least one line.

主权项

1. A laser scanning device comprising:
a light source configured to emit a light beam; a deflection portion configured to cause the light beam emitted from the light source to scan a scanned surface one line by one line by deflecting the light beam at a predetermined deflection angle; an image forming lens configured to condense the light beam deflected by the deflection portion on the scanned surface, and cause the light beam to be scanned on the scanned surface in a scanning direction at an equal speed; a block position setting portion configured to set one or more block areas which each include a plurality of section areas sectioned from each other on the scanned surface in the scanning direction; and a light source control portion configured to control the light source to irradiate the light beam to the plurality of section areas at a plurality of irradiation timings that are determined for each of the block areas set by the block position setting portion, wherein the block position setting portion shifts set positions of the block areas along the scanning direction for each scan of at least one line.