Basic working principle of color difference meter. Color is a matter of perception and subjective interpretation. Even if they look at the same object, people will express the same color in very different words according to different standards and experiences. Therefore, expressing colors with words is complicated and difficult. However, the color difference meter is to colorize the data so that the differences in colors can be expressed more intuitively.

Precision color difference meter

Basic working principle of color difference meter. The color difference meter is an optical measuring instrument that simulates the human eye's sensitivity to red, green, and blue light. But how to use colorimeter to colorize data? The color world is composed of three attributes: hue, brightness, and color saturation. By establishing scales for hue, brightness, and color saturation, we can measure colors digitally, and now the color space method is used worldwide for digital expression of colors.

Basic working principle of color difference meter. The color difference meter can measure and display the color difference ΔE and Δa, Δb, ΔL of the sample and the standard according to the Lab principle of the CIE chromaticity space. ΔE * ab is defined as the total color difference of the sample, but it cannot indicate the shift direction of the sample color difference. The larger the value of ΔE * ab, the larger the color difference. The value of ΔE * ab depends on the requirements of different companies. In general, ΔE * ab greater than 1 human eye can distinguish chromatic aberration.