Patent ID: 7898664
Filing Date: 2011-03-01
Classification: G01J,G01N

Abstract:
1. A method for measuring chromaticity values in a colorimeter, comprising: (a) emitting three visible band light of different spectra, S(λ)* (b) receiving reflective lights reflected off the surface of the object with a power meter, wherein the power meter is calibrated to perform the function of 683*∫PM(λ)dλ, wherein the reflective lights are with spectra of R(λ)*[S(λ)* R(λ)*[S(λ)* (c) computing chromaticity values X, Y, Z of the object based upon a luminous intensity received by the power meter, wherein the power meter receives the reflective lights reflected off the surface of the object; and (d) obtaining the chromaticity values X, Y, Z that is wherein an illuminating spectrum tunes the effect of S(λ) based upon various requested colorimetric conditions, wherein the various requested colorimetric conditions are CIE standard illuminants A and C.