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OPTICAL NAVIGATION SYSTEM AND METHOD OF ESTIMATING MOTION WITH OPTICAL LIFT DETECTION

  • US 20110095984A1
  • Filed: 01/04/2011
  • Published: 04/28/2011
  • Est. Priority Date: 11/20/2006
  • Status: Active Grant
First Claim
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1. An optical navigation system comprising:

  • a light source configured to generate light;

    an image sensor positioned to receive a first portion of said light reflected from a target surface, said image sensor being configured to generate frames of image data in response to said received first portion of said light for motion estimation; and

    a lift detection unit comprising;

    a plate with an aperture;

    a photodetector positioned over said plate; and

    an optical system positioned over said plate to receive a second portion of said light from said light source, said optical system being configured to direct said second portion of said light through said aperture of said plate, said optical system being further configured to direct said second portion of said light reflected from said target surface and transmitted back through said aperture of said plate toward said photodetector to be detected by said photodetector for lift detection.

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