| 摘要 |
PROBLEM TO BE SOLVED: To make the picture quality high. SOLUTION: This optical scanning device is equipped with a polygon mirror 5a which includes eight mutually adjacent reflecting surfaces 201-208 and deflects light beams, having their intensity modulated corresponding to dot image data, to a specific direction. This polygon mirror 5a is so prescribed that the quantity of a shift in imaging position between light beams, corresponding to dot images reflected by one reflecting surface and a reflecting surface adjoining to the reflecting surface, on an image plane is <=1.5 time as large as the distance between the dots. |
