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Fig. 2-2: Chromatic Confocal Imaging principle (point sensor)
2.2.2 Principle applied to multiple points sensor
Applying Confocal Chromatic Imaging to multipoint sensor consists in increasing the number of
illumination point’s source and the number of pinhole in front of the detector spectrometer. In this
configuration, the spectrometer is preferably bidimensionnal. One direction corresponds to the channel
number and the other direction carry the wavelength information. Consequently the spectrometer carry
the information of each point focused on the target’s surface, and the distance of the target surface
from the chromatic objective can be calculated for all the focused points. According to CHRocodile
CLS, the focused points describe a line composed of 192 equally separated points.
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