| 摘要 |
PROBLEM TO BE SOLVED: To perform, with high accuracy, angle adjustment of a rotary shaft of a rotary body comprising a rotary polygon mirror for polarizing light beams emitted from a light source.SOLUTION: A self-tapping screw 350C inserted in an adjustment hole 268 is gradually tightened. As the self-tapping screw 350C is tightened, a side, where a rotary body 210 to a virtual straight line S1 in a circuit board 250 is disposed, is made to be bent. Then, as the circuit board 250 is made to be bent, a rotary shaft 212 is made to be inclined to an opposite side of the virtual straight line S1, thereby, an angle of the rotary shaft 212 of the rotary body 210 is adjusted. |
