Patent ID: 9158108
Filing Date: 2015-10-13
Classification: G02B,H04N

Abstract:
1. An optical scanning device comprising: a movable mirror reflecting a light beam applied thereto; a first beam joined to an end of said movable mirror; a second beam joined to another end of said movable mirror; a first piezoelectric element generating stress for swinging said movable mirror through said first beam when a first voltage is applied to the first piezoelectric element; and a second piezoelectric element generating stress for swinging said movable mirror through said first beam when a second voltage is applied to the second piezoelectric element; a third piezoelectric element generating stress for swinging said movable mirror through said second beam when said first voltage is applied to the third piezoelectric element; a fourth piezoelectric element generating stress for swinging said movable mirror through said second beam when said second voltage is applied to the fourth piezoelectric element; a fifth piezoelectric element disposed between said first piezoelectric element and said second piezoelectric element, generating stress for swinging said movable mirror through said first beam when a third voltage is applied to the fifth piezoelectric element; and a sixth piezoelectric element disposed between said third piezoelectric element and said fourth piezoelectric element generating stress for swinging said movable mirror through said second beam when said third voltage is applied to the sixth piezoelectric element, wherein: said third piezoelectric element and said fourth piezoelectric element have respective patterns whose longitudinal directions are aligned with a longitudinal direction of said second beam; and said third piezoelectric element and said fourth piezoelectric element are disposed on said support plate, with no hole being present between said third piezoelectric element and said fourth piezoelectric element and said third piezoelectric element and said fourth piezoelectric element having an insulating distance between them.