| 摘要 |
<p>An optical scanning device having a deflector with an oscillating element wherein a relation 0.85 < (dY/d¸) / (dY 0 /d¸ 0 ) < 1.15 is satisfied throughout an effective scan region, where ¸ 0 is a deflection angle of the oscillating element as a light beam scans the centre position Y 0 of an effective scan region on a scan surface with respect to a main-scan direction, ¸ is the deflection angle of the oscillating element as the light beam scans a scan position Y in the effective scan region with respect to the main-scan direction, dY 0 is an amount of change at the centre position Y 0 on the scan surface with reference to an amount of change d¸ 0 of the oscillating element at the deflection angle ¸ 0 , and dY is an amount of change at the scan position Y on the scan surface with reference to an amount of change d¸ of the oscillating element at the deflection angle ¸.</p> |
