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Photographing device provided with dust removing mechanism

  • US 8,199,200 B2
  • Filed: 02/17/2004
  • Issued: 06/12/2012
  • Est. Priority Date: 05/13/2002
  • Status: Active Grant
First Claim
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1. A photographing device provided with a dust removing mechanism comprising:

  • a photoelectric conversion element which converts an optical image into an electric signal;

    an optical element arranged in a light path of the photoelectric conversion element;

    a piezoelectric element provided at a peripheral portion of the optical element;

    a drive circuit which supplies a drive signal to the piezoelectric element to drive the piezoelectric element; and

    a control circuit which causes the piezoelectric element to vibrate via the drive circuit, to thereby cause flexural standing wave vibration in the optical element, the control circuit being configured to cause at least two flexural standing wave vibrations in the optical element at different nodes of vibration sequentially for predetermined time periods which are determined in accordance with characteristics of the optical element by changing control modes with time.

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