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LIGHT MEASURING APPARATUS AND LIGHT MEASURING METHOD

  • US 20110216323A1
  • Filed: 02/25/2011
  • Published: 09/08/2011
  • Est. Priority Date: 03/05/2010
  • Status: Active Grant
First Claim
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1. A light measuring apparatus comprising:

  • a light source that emits a light with a known spectrum toward a road surface;

    a first light receiver that receives a first reflected light that is a reflected light of the known light reflected from said road surface;

    a second light receiver that receives a second reflected light that is a reflected light of an environmental light reflected from said road surface;

    a storage unit that previously stores data on the spectrum of said known light; and

    a calculator that calculates a reflectance spectrum of the light of said road surface from a spectrum of said first reflected light received by said first light receiver and the spectrum of said known light stored in said storage unit, and calculates a spectrum of said environmental light from a spectrum of said second reflected light received by said second light receiver and the calculated reflectance spectrum of the light of said road surface.

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