3 ms·
Looks like it's reflectance spectroscopy. The specific polymers in the plastic will have signature absorption lines that will be there no matter the color or ov
by andreareina 5y ago
Looks like it's reflectance spectroscopy. The specific polymers in the plastic will have signature absorption lines that will be there no matter the color or overall reflectivity of the surface, as long as enough light reaches the sensor.