Patent ID: 8681408
Filing Date: 2014-03-25
Classification: G02B

Abstract:
1. An optical scanning device, comprising: a substrate having a three-layer structure including an oxide film sandwiched between two silicon substrates; a frame; a torsion beam to swingably support a mirror portion, the mirror portion deflecting a light beam projected from a light source; and a cantilever supported by the frame, to connect to the torsion beam and apply torque to the torsion beam, the cantilever and the torsion beam formed on the same silicon substrate, the cantilever having a thickness substantially thinner than the thickness of the torsion beam, and the cantilever having a substantially curvilinear thickness distribution on a side of the cantilever adjacent to the oxide film, the thickness of the cantilever being smallest at a portion that is farthest from the oxide film in a thickness direction of the cantilever.