3 ms·

In addition to x-rays, hyperspectral cameras can also be used to discern material composition at least superficially: https://www.photonics.com/Articles/Hypersp

In addition to x-rays, hyperspectral cameras can also be used to discern material composition at least superficially: https://www.photonics.com/Articles/Hyperspectral_Imaging_Assesses_the_Sweetness_of/a68686 https://www.photonics.com/Articles/Hyperspectral_Imaging_Ass... https://www.specim.com/hyperspectral-imaging-applications/hyperspectral-imaging-in-recycling-and-waste-management/ https://www.specim.com/hyperspectral-imaging-applications/hy... awesome tech

hinkley 1y ago
Yeah the time before that when I encountered such a picker, someone was trying to recycle mixed plastics by chopping them up and the somehow with cameras they could see which plastic type it was. I’m sure they were using more than visible light to accomplish that. Sadly haven’t heard much since so I don’t know if they are still around, if it didn’t work at all or if they just couldn’t make it cheap enough. I don’t recall the name of the group. One is mentioned in your link and they achieves 98% purity, which may not be sufficient for industrial use.