OPTICAL SCANNING DEVICE

摘要

An optical scanning device includes a mirror part including a mirror reflecting surface to reflect incident light, a pair of torsion bars configured to support the mirror part from both sides and configured to form a first axis around which to swing the mirror part by a torsional motion thereof so as to deflect the reflected light, and at least one stress alleviation area configured to alleviate a stress generated by the torsional motion of the torsion bars. The alleviation area is provided between an intersection of a second axis perpendicular to the first axis and passing through the center of the mirror reflecting surface and an edge of the mirror reflecting surface, and at least one of the torsion bars.

主权项

1. An optical scanning device comprising:
a mirror having a center; a movable frame provided to support the mirror from outside the mirror; and a pair of drive units provided on both sides of the movable frame lying in a straight line passing through the center of the mirror and configured to swing the movable frame around the straight line, wherein the movable frame includes a hollow part provided in an area including the farthest location from the straight line.