Patent ID: 7538870

Claim:
A multi-channel colorimeter comprising: a spectral means that separates light to be measured into components of different wavelengths; a photoelectric converter provided with multiple wavelength channels that receive the separated light to be measured according to the wavelengths, the photoelectric converter configured to output signals on the respective channels corresponding to the respective wavelengths; a calculating section that converts the output signals to a spectral intensity of the light to be measured and calculates colorimetric properties of the light to be measured based on a composite spectral sensitivity which approximates a predetermined spectral sensitivity by integrating the outputs from the respective wavelength channels multiplied by corresponding weighting factors; and a special weighting factor generator configured to correctively generate the corresponding weighting factors as a special weighting factor correlated with each of spectral sensitivities of said multiple wavelength channels for the light to be measured each time a measurement is performed, based on said spectral intensity of the light to be measured, for improving an accuracy of the calculated colorimetric properties of the light to be measured.