| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a material discrimination device for waste plastic capable of minimizing reduction of a reflectance of a reflection near-infrared spectrometer, and maintaining material discrimination precision high. SOLUTION: This material discrimination device for the waste plastic is equipped with a light source for radiating light containing a near infrared ray, and a facing reflector across the waste plastic for discriminating the material thereof, arranged roughly perpendicularly with the optical axis of the light source, a spectrometer for executing spectrometry of the near infrared ray radiated from the light source and reflected by the waste plastic or the reflector, and an operation device for determining the material of the waste plastic based on the result of the spectrometry by the spectrometer. The device has a formation having irregularities formed on the reflecting surface of the reflector.</p> |
