| US 7,538,870 B2 | ||
| Multi-channel colorimeter and method for measuring spectral intensity characteristics | ||
| Kenji Imura, Toyohashi (Japan) | ||
| Assigned to Konica Minolta Sensing Inc., Osaka (Japan) | ||
| Filed on Nov. 09, 2004, as Appl. No. 10/984,718. | ||
| Claims priority of application No. 2004-195783 (JP), filed on Jul. 01, 2004. | ||
| Prior Publication US 2006/0001873 A1, Jan. 05, 2006 | ||
| Int. Cl. G01J 3/28 (2006.01) | ||
| U.S. Cl. 356—326 | 11 Claims |
| 1. 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.
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