| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compact and inexpensive optical scanner configured to eliminate problems to be caused by wide viewing angle.SOLUTION: Two incident optical systems including light sources 1, 1b, respectively, are arranged so as to be substantially symmetrical with respect to a plane (sub-scanning cross section) including a rotation axis of a polygon mirror 5 and parallel to a main-scanning direction. Between the two incident optical systems, a synchronization optical system including a synchronization lens 10 and a synchronization detection part 11 is arranged, and a light shielding part 12 for shielding opposite flare light is disposed.</p> |
