Color measuring device and color measuring method

Abstract

The color of the object to be measured is measured with high precision by receiving light at a measurement timing at which the amount of light received is sufficiently obtained. A colorimetric device (1) for measuring the color of a measurement object based on reflected light from a measurement object (W) is composed of: a light source (21) that emits light; a rotating plate (42) that makes a plurality of interference filters The optical device (45) rotates around to split the light from the light source; the light receiving sensor (38) receives the light obtained by splitting light through a plurality of interference filters; and the correction unit based on the spectral distribution of the light receiving sensor, The measurement timing of the light-receiving sensor is corrected from the theoretical value to the measured value at which the peak of the spectral distribution is obtained, and the reflected light from the measurement object is received by the light-receiving sensor at the corrected measurement timing to measure the color of the measurement object.

Description

technical field [0001] The present invention relates to a colorimetric device and a colorimetric method for measuring the color of an object to be measured. Background technique [0002] Conventionally, as a colorimetric device, there is known a colorimetric device that irradiates light from a light source to an object to be measured, decomposes the reflected light from the object to be measured for each wavelength, and measures the color of the object to be measured (for example, Refer to Patent Document 1). In the colorimetric device described in Patent Document 1, light is irradiated to a measurement object, and reflected light from the measurement object is received by a light-receiving sensor through an interference filter provided on a rotating plate. A plurality of interference filters having different transmission wavelengths are provided on the rotating plate around the rotating shaft, and the interference filters are sequentially switched by rotation of the rotati...

AI Technical Summary

Problems solved by technology

[0004] In addition, in the above-mentioned colorimetric device, due to mechanical errors, etc., there may be deviations in the measurement timing when the center of the interference filter coincides with the center of the light-receiving sensor.

If the center of the light-receiving sensor and the center of the interference filter are shifted, the measurement accuracy may be deteriorated due to insufficient received light.

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