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RANGING APPARATUS AND RANGING METHOD

  • US 20080231832A1
  • Filed: 03/22/2008
  • Published: 09/25/2008
  • Est. Priority Date: 03/23/2007
  • Status: Active Grant
First Claim
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1. A ranging apparatus comprising:

  • a light-emitting unit for emitting a modulated light which is intensity-modulated;

    a light-detecting unit for detecting a reflected light from an object that is irradiated with said modulated light;

    a calculating unit for calculating a distance up to said object based on a phase difference between said modulated light and said reflected light;

    an intermittent emission control unit for controlling said light-emitting unit to intermittently emit said modulated light to said object; and

    an intermittent detection control unit for controlling said light-detecting unit to intermittently detect said reflected light based on the intermittent emission of said modulated light under the control of said intermittent emission control unit;

    wherein said calculating unit includes a corrector for correcting the distance up to said object based on information produced by intermittently detecting said reflected light.

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