Optical: systems and elements – Deflection using a moving element – By moving a reflective element
Reexamination Certificate
2011-04-12
2011-04-12
Cherry, Euncha P (Department: 2872)
Optical: systems and elements
Deflection using a moving element
By moving a reflective element
Reexamination Certificate
active
07924490
ABSTRACT:
An oscillator device includes an oscillation system having a first oscillator, a second oscillator, a first resilient supporting member and a second resilient supporting member, wherein the oscillation system has at least two frequencies of natural oscillation mode around the torsion axis which include a first resonance frequency f1and a second resonance frequency f2, wherein there is a relationship that f2is approximately two-fold of f1, wherein Δf which is expressed as Δf=f2−f×f1has a relationship of Δf<0, and wherein the drive control means supplies, to the driving means, a driving signal which is comprised of a driving signal based on synthesizing a first driving signal having a first driving frequency and a second driving signal having a second driving frequency, and which is such driving signal that, when a lower-frequency side driving frequency among the first and second driving frequencies is denoted by Df1and a higher-frequency side driving frequency is denoted by Df2, it satisfies relationships Df1<f1, Df2>f2and Df1×2=Df2.
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U.S. Appl. No. 12/809,053, filed Jun. 17, 2010, by Kazunari Fujii, Hideta Nishizawa and Kazufumi Onuma.
Fujii Kazunari
Nishizawa Hideta
Onuma Kazufumi
Canon Kabushiki Kaisha
Cherry Euncha P
Fitzpatrick ,Cella, Harper & Scinto
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