Patent ID: 9140642
Filing Date: 2015-09-22
Classification: G01J,G01N

Abstract:
1. A spectrophotometer that measures a spectral reflectance of an object to be measured and determines a color value of the object to be measured based on a color-matching function of XYZ color system and the measured spectral reflectance, the spectrophotometer comprising: an irradiation unit configured to irradiate the object to be measured with light; a spectroscope configured to disperse reflected light from the object to be measured; and a signal processing unit, wherein the irradiation unit irradiates light having a spectral intensity distribution in which a relative intensity at a wavelength at a value of z in the color-matching function of XYZ color system is equal to or greater than 0.5 relative to a peak of the spectral intensity in which the spectral intensity distribution irradiated from the irradiation unit is normalized, and wherein the signal processing unit determines: