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:
Aug. 17, 2010
Filed:
Mar. 14, 2008
Hirotake Ando, Tokyo, JP;
Hirotake Ando, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical deflection apparatus including a light source; an optical deflector including first and second oscillators and first and second torsion springs, the first torsion spring connecting the first and second oscillators, the second torsion spring being connected to the second oscillator, and the first and second torsion springs sharing a common torsion axis; and a driver that applies a driving force to the optical deflector; and a driving controller that supplies a driving signal to the driver. The driving controller sets a reference frequency on the basis of a resonant frequency of the optical deflector, calculates a target time at which one of the first and second oscillators makes a predetermined deflection angle on the basis of the reference frequency, and supplies such a driving signal that the one of the first and second oscillators passes through a point corresponding to the predetermined deflection angle at the target time.