Optical scanning device
AssigneeMitsumi Electric Co., Ltd.
InventorsToyoki Tanaka, Tsukasa Yamada, Takahiko Nishiyama
Life of this patent
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Abstract
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 forma 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.
Claims16
An optical scanning device comprising:
- 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 being 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.
Dependencies are inferred from the claim text.