As the name implies, chromatic aberration is a deviation of color and a set of color data obtained by simulating color space.
1. According to the Lab, Lch principle of the CIE color space of the international standard lighting Committee, the color difference meter shows the color difference Delta E of the sample and the sample measured and the value of delta L, delta A and delta B, which are widely used in plastics, printing, spraying, leather and other industries.
2, the definition of chromatic aberration is delta E, which is a composite value representing the color space. It is obtained by the a square plus b square plus L square. With 0 as the dividing line, a means reddish and partial green, B indicates yellowish and partial blue, and L indicates brightness. For example: if a and target value are greater than 0, it means reddish, the larger the more red, and the less red or too green, B and L are the same. From the formula of delta E, you can see that you can't just look at Delta E, you should look at a, B, L, because no matter a, B, L positive or negative square results are the same, for example, if a=-0.5 and 0.5, B, L are the same, the calculated Delta E results are the same, but the color obviously does not have the latter red.
3, the color difference meter automatically compares the color difference between the standard plate and the tested product, and outputs the three sets of data of L, a, B and four groups of color difference data of delta E, Delta L, delta A and delta B after color comparison. Delta E denotes the size of the total chromatic aberration, Delta L "+" denotes white, Delta L "-" means deep, Delta a "+" indicates red, Delta a "-" means green, delta B "+" denotes yellowing, delta B "-" indicates blue.
4, color difference (tolerance) range Delta E:0 ~ 0.25, very small or not, ideal match; Delta E:0.25 ~ 0.5, small, acceptable matching; Delta E:0.5 ~ 1, small to medium, acceptable in some applications; Delta E:1.0 ~ 2, medium, acceptable in specific applications; Delta E: 2 to 4, gap, gap, in Acceptable in specific applications; Delta E:4.0 above is very large and unacceptable in most applications.
