The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Feb. 28, 2013
Jun Akedo, Tsukuba, JP;
Jaehyuk Park, Tsukuba, JP;
Jun Akedo, Tsukuba, JP;
Jaehyuk Park, Tsukuba, JP;
Abstract
An optical scanning device of the invention includes: a substrate; torsion bar portion which is connected to the substrate; a mirror portion which is supported by the torsion bar portion; a drive source which causes the substrate to oscillate; and a light source which projects light onto the mirror portion, where the mirror portion resonates and vibrates in accordance with a vibration imparted to the substrate by the drive source, and the direction of reflection light from the light projected onto the mirror portion from the light source changes in accordance with the vibration of the mirror portion, and a spring constant in a longitudinal direction of the torsion bar portion supporting the mirror portion is distributed along the longitudinal direction of the torsion bar portion.