Patent ID: 9122059
Filing Date: 2015-09-01
Classification: G02B,H02K

Abstract:
1. An optical scanning device comprising: a main movable portion; a pair of torsionally deformable main torsion beams arranged opposite to each other at both ends of the main movable portion and swingably supporting the main movable portion; and a main driving unit that drives the main movable portion to oscillate; wherein the main movable portion includes a mirror unit having a reflection surface for reflecting light, and a pair of permanent magnets arranged opposite to each other to sandwich the mirror unit, each permanent magnet extending along the oscillation axis of the main movable portion, and wherein the main driving unit includes a yoke unit arranged along the oscillation axis of the main movable portion to surround the permanent magnets, and a coil wound on the yoke unit and configured to be energized to magnetize the yoke unit, thereby generating magnetic fields to be applied on the permanent magnets.