The commonly used light sources in color difference detection are as follows:
D65 light source: D65 is a standard light source, and it is also a standard light source stipulated by the international standards organization ISO and the International Commission on Illumination (CIE). It is a natural light source with a spectral distribution similar to the natural spectrum during the day, so it is widely used in color comparison and evaluation.
D50 light source: The D50 light source is also a standard light source, and its spectral distribution is closer to the medium color temperature light source of sunlight than the D65 light source. Therefore, it is widely used in printing, textile and other industries.
TL84 light source: TL84 light source is an industrial light source whose spectral distribution is similar to that of daylight afternoon or incandescent lamps, so it is widely used to detect the consistency of colors such as lighting equipment, plastics, paints and inks.
CWF light source: CWF light source is a cold incandescent light source whose spectral distribution is similar to that of some commercial lighting equipment, so it is also widely used in some color comparisons and evaluations.
F11 light source: F11 light source is a light source that simulates sunlight and is used to measure the color performance of objects in natural light.
In practical applications, choosing the right light source depends on the application field and specific requirements, and needs to be selected according to the actual situation.
