The PLOTS Spectrometer is a tool we've been developing at RISD's Environmental Justice research group with student Colin Frazer. It consists of a <b>cardboard box, a broken CD, and a digital camera</a>. We're hoping to use it to identify contaminants and produce hyperspectral scans.

We've created an online analysis tool to upload your spectrometer photos for interpretation. All of this is very prototoype-stage, and we haven't yet identified a material based on the spectra it generates. 

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http://spectrometer.publiclaboratory.org