LIGHT SCANNING DEVICE AND THRUST-DIRECTION FORCE CANCELING METHOD

摘要

At least a part of a first thrust-direction force generated by air resistance received by at least one surface of reflection surfaces arrayed in a rotating direction of a polygon mirror and tilted with respect to a rotation axis of the polygon mirror is canceled by a second thrust-direction force generated by air resistance received by a surface tilted with respect to the rotation axis in a direction opposite to the surface where the first thrust-direction force is generated.