3. Detection and ejection sorting techniques
3.1 Sorting
Various techniques are available for detecting, spatially locating and sorting out any foreign bodies for ejection:
electromagnetic technologies (metal detectors) ;
technologies using industrial imaging: either by means of cameras (optical sorting systems with various wavelengths – visible, UV, infrared, multispectral), or by means of "computer reconstructed" images from rapid scans of the product (laser imaging for surface examination or X-ray imaging, the only technique enabling in-depth detection of the product, and therefore control of a product in its packaging);
acoustic technologies: ultrasonic emission/reception detectors;
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Detection and ejection sorting techniques
Metal detectors
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