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Focus detection device

  • US 20060055813A1
  • Filed: 09/13/2005
  • Published: 03/16/2006
  • Est. Priority Date: 09/14/2004
  • Status: Active Grant
First Claim
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1. A focus detection device comprising:

  • an AF sensor which converts received object light into electrical charges, integrates said electrical charges, and outputs said integrated electrical charges as a video signal in pixel units;

    a photometering sensor which converts received light into an electrical signal to output said electrical signal as a photometering signal;

    a flicker repetition period determining device for determining a flicker repetition period of said received object light from fluctuations of said photometering signal of said photometering sensor; and

    a controller which causes said AF sensor to start integrating said electrical charges in synchronization with said flicker repetition period.

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