Patent ID: 8559088

Claim:
An adjustment apparatus for a light source unit to be installed on an optical scanning apparatus including a deflector, the light source unit including a laser light source and a condensing optical element for condensing a light beam emitted from the laser light source, and leading the condensed light beam to the deflector, the adjustment apparatus comprising: a dividing element for dividing the light beam emitted from the light source unit into a plurality of light beams in at least one of a main scanning direction and a sub-scanning direction; an imaging optical element for forming a plurality of images corresponding to the plurality of light beams divided by the dividing element on a light receiving element; and an adjustment mechanism for adjusting, based on a relative position between the plurality of images and positions of the plurality of images with respect to the optical axis, a relative position between the condensing optical element and the laser light source along a direction of an optical axis of the condensing optical element, and two relative positions between the condensing optical element and the laser light source along the respective directions orthogonal to each other and orthogonal to the optical axis of the condensing optical element.