![]() The choice of the correct or incorrect measurement geometry can have a considerable effect on the measurement results and lead to interpretational errors during the information exchange between customers and / or suppliers. The measurement geometry describes the alignment between the emitting light source of the measuring device and the surface of the object to be measured as well as the alignment of the sensor to the reflecting surface of the object to be measured. ![]() For the use in the production process, the goods receipt and output control, as well as in quality control, the color comparison measurements with the simple representation of color differences and deltaE values by means of color meters are generally sufficient. ![]() The reason for this is that usually different spectral reflection properties of the surfaces are caused by the use of different pigments.įor this reason, spectrometers are preferably used in research and development as well as in cases when colors and color spectra have to be determined very precisely. In case of this phenomenon, for example, two different objects under a certain light source appear to be of the same color, but under a different light source a distinct color difference is visible and evident. Thus, not only color coordinates can be determined, but also the spectral distribution and intensity can be determined and represented much more precisely. Depending on the quality of the device, spectrometers are equipped with significantly more sensors so that the devices have a wavelength-specific sensitivity in a single-digit nanometer range. Though spectrometer works according to the identical basic principle, the significant difference to color meter is sensitivity and the number of sensors. The color values determined in this way are represented as X, Y and Z values on the display by the measuring devices, the conversion into common color spaces such as CIELab or RGB is carried out by most devices automatically. In the human eye the three basic colors red, green and blue are recorded over three different cone types, color meter imitates this color perception by means of 3 color sensors with almost identical spectral sensitivity in the areas of red, green and blue. ![]() Color meter works according to the tristimulus absorption and imitates human vision. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |