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DISPLACEMENT MEASURING APPARATUS AND VELOCITY MEASURING APPARATUS WHICH MEASURE DISPLACEMENT AMOUNT OF MOVING OBJECT

  • US 20110181865A1
  • Filed: 01/18/2011
  • Published: 07/28/2011
  • Est. Priority Date: 01/22/2010
  • Status: Active Grant
First Claim
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1. A displacement measuring apparatus for measuring a displacement amount of a moving object, the displacement measuring apparatus comprising:

  • a light source configured to irradiate the moving object using luminous flux emitted from a light emitting area;

    a light receiving element including a plurality of light receiving areas arranged in a movement direction of the moving object, the light receiving element being arranged such that luminous flux emitted from the light emitting area and that is reflected from indentations in the moving object are imaged on a light receiving surface of the light receiving element; and

    a measurement unit configured to measure the displacement amount of the moving object based on a movement amount of a light emitting area image that is formed on the light receiving element.

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