Patent ID: 8427728
Filing Date: 2013-04-23
Classification: B81B,G02B

Abstract:
1. An optical scanner comprising: a mirror portion to be oscillated around an oscillation axis so as to scan light in a predetermined direction; a pair of torsion beam portions arranged along the oscillation axis of the mirror portion, each of the pair of torsion beam portions having one end connected to one of two opposing ends of the mirror portion with respect to a direction of the oscillation axis; a pair of supporting beam portions extending along a direction at right angles to the oscillation axis, the pair of supporting beam portions arranged at opposite sides across the mirror portion and the pair of torsion beam portions, each center of the pair of supporting beam portions in a longitudinal direction is connected to other end of each of the pair of torsion beam portions, and both ends of each of the pair of supporting beam portions in the longitudinal direction are positioned outside with respect to both ends of the mirror portion in the direction at right angles to the oscillation axis, respectively; a pair of substrate portions arranged next to the both ends of the mirror portion in the direction at right angles to the oscillation axis, respectively, and at opposite sides across the mirror portion, symmetrically with respect to the direction at right angles to the oscillation axis, each of the pair of substrate portions being tabular-shaped, wherein, in one of the pair of substrate portions, a side edge portion facing the mirror portion is connected to one end of each of the pair of supporting beam portions with respect to the longitudinal direction, and in other of the pair of substrate portions, a side edge portion facing the mirror portion is connected to other end of each of the pair of supporting beam portions with respect to the longitudinal direction; a fixing member to be connected to an outer side portion of each of the pair of substrate portions, the outer side portion with respect to the direction at right angles to the oscillation axis; and an excitation device formed on a surface of at least one of the pair of substrate portions, wherein an edge on an outer side of the excitation device with respect to the direction at right angles to the oscillation axis is spaced from an outer side portion of the at least one of the pair of substrate portions in a direction closer to the mirror portion, the outer side portion with respect to the direction at right angles to the oscillation axis.