Colorimetry device and colorimetry method

Abstract

The color of an object to be measured is measured with high precision by receiving light at a measurement timing at which the light receiving amount is sufficiently obtained. A colorimetry apparatus (1) for measuring the color of an object to be measured based on reflected light from the object to be measured (W) comprises a light source (21) which irradiates with light; a rotary plate (42) whichenables a plurality of interference light filters (45) to rotate and perform light splitting on light from the light source; a light receiving sensor (38) for receiving the light obtained by light splitting through the plurality of interference filters; and a correction unit which, based on spectral distribution of the light receiving sensor, corrects the measurement timing of the light receivingsensor from a theoretical value to a measured value at which a peak of spectral distribution is obtained, and at the corrected measurement timing, the reflected light from the object to be measured being received by the light receiving sensor, and the color of the object to be measured being measured.

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...

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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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