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Measuring apparatus and measuring method

  • US 8,482,742 B2
  • Filed: 01/29/2010
  • Issued: 07/09/2013
  • Est. Priority Date: 02/06/2009
  • Status: Active Grant
First Claim
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1. A measuring apparatus comprising:

  • a filter that transmits light of a predetermined wavelength;

    a first light receiving unit which receives a first light that is output from a first light source, reflected by or transmitted through an object to be measured, and transmitted through the filter and a second light that is output from a second light source, reflected by or transmitted through the object to be measured, and transmitted through the filter, and through which a first signal in response to the received first and second lights travels;

    a second light receiving unit which receives light of a different path from the light received by the first light receiving unit, and through which a second signal in response to the received light travels;

    a difference extracting unit that obtains a difference signal between the first signal traveling through the first light receiving unit and the second signal traveling through the second light receiving unit; and

    an information generating unit that generates information of the object to be measured based on the signal obtained from the difference extracting unit.

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