Patent ID: 8872876

Claim:
An optical scanner comprising: a light source that emits a first light beam and a second light beam; a scanning unit comprising: a polygon mirror that deflects the first light beam and the second light beam; a first optical member that guides the deflected first light beam to a first scanning target to scan the first target in a scanning direction; and a second optical member that guides the deflected second light beam to a second scanning target to scan the second scanning target in the scanning direction; and a scanner frame that supports the scanning unit, the polygon mirror being disposed at a center of the first optical member and the second optical member in a sub-scanning direction orthogonal to the scanning direction, the scanner frame having a first supported part at a position corresponding to the polygon mirror in the sub-scanning direction, and a second supported part other than the first supported part, the first supported part being fixedly supported by a main frame of a laser printer, the second supported part being elastically supported by the main frame, wherein the scanner frame has a rectangular shape having four corners, the second supported part being disposed at each corner.