Application of Colorimeter

As we all know, common colors can be "spelled" in different proportions with red, green, and blue primary color lights. In order to facilitate the measurement of color, physicists have introduced tri-stimulus values. According to the theory of chromaticity, the color of any shade of light can be expressed by tri-stimulus values. Tristimulus values ​​can be measured objectively by optical means. For non-luminous objects, you can measure its color (also called object color) under some standard light source. In fact, it is to collect the reflected light of the sample, and then measure the stimulation value of these reflected light. The current common Colorimeters are developed based on the above theory. The basic principle of the Colorimeter is to collect the reflected light of the sample as a benchmark, measure the tristimulus values ​​of the reflected light of the target sample and the sample to be tested, and then according to them. Different positions in the CIE color space (which can be 1*a*b* color space or 1*u*v* color space) determine the color difference between the two, taking into account the metamerism characteristics of the object color, in When discussing color, the standard illuminant and standard observer are always specified, so the applications discussed in this article are carried out under the condition of D65/10 light source, and the 1*a*b* color space is widely used in the textile industry. as an example.