Oscillator device, optical deflector and image forming...

Details Oscillator device, optical deflector and image forming... Oscillator device, optical deflector and image forming...

2011-04-05

2011-04-05

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

By moving a reflective element

Reexamination Certificate

active

07920313

ABSTRACT:
An oscillator device includes an oscillation system having first and second oscillators and first and second resilient supporting members, wherein the oscillation system has at least two frequencies of natural oscillation mode around a 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, and wherein a drive control member supplies, to a driving member, 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, among the first and second driving frequencies, a lower-frequency side driving frequency Df1and a higher-frequency side driving frequency Df2satisfy a relationshipin-line-formulae description="In-line Formulae" end="lead"?Df1×2=Df2in-line-formulae description="In-line Formulae" end="tail"?and that Df2satisfies a relationshipin-line-formulae description="In-line Formulae" end="lead"?f2−|Δf/2|<Df2<f2+|Δf/2|.in-line-formulae description="In-line Formulae" end="tail"?

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U.S. Appl. No. 12/809,052, filed Jun. 17, 2010, by Kazunari Fujii, Hideta Nishizawa and Kazufumi Onuma.

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