What are the factors that affect the measurement accuracy of the color difference meter? The color difference meter is widely used as a precision instrument for color detection. Color measurement is a very complicated subject that involves psychology, physiology, physics, lighting, optics, information science, geometry And other disciplines. Object color is not only related to the reflection, transmission, or absorption characteristics of the object surface, but also to the spectral power distribution of the illumination light source, and to the color vision characteristics. In order to obtain consistent results for color evaluation, color measurements need to use colorimetric standards. Tri-color matching is the physical basis of color measurement, and the standard colorimetric system formulated and published by the International Institute of Illumination (CIE) is its reference benchmark.

Colorimeter

What are the factors that affect the measurement accuracy of the color difference meter?

*Lighting system. The internal illumination light source of the color difference meter is usually a standard A light source, and in actual applications, it is necessary to measure the chromaticity value of the object under the standard D65 and C light sources, so to simulate the D65 light source, as long as the total spectral sensitivity of the instrument is in line with D65 Conditions are sufficient.

Factors affecting measurement accuracy in lighting systems are:

1. Illumination light source: When designing the power supply circuit of the light source, it is necessary to ensure the stability of the output voltage of the power source so as to ensure the stability of the light source. Secondly, the instrument must be warmed up for a long enough time to stabilize the light source spectrum before measurement.

2. Convex lens: the function is to make the light emitted by the light source become uniform "parallel light". But in reality this is impossible, because our light source is not a point light source, so we can only get approximate parallel light.

What are the factors that affect the accuracy of the color difference meter? These methods of improving accuracy have been tested and improved in the laboratory and have achieved good results. And successfully applied to the new digital colorimeter, through practice, these factors such as the insulation glass of the lighting system, the correction of the integrating sphere, the optimization of the color filter and the adjustment of the gain must be considered. By adjusting and improving the software and hardware of the color difference meter, it has reached the requirements of China's standard level.