RECYCLING GLASS

Raman imaging: attractive, alternative technique for sorting glass: During this project, we turned Raman spectroscopy, which was purely a laboratory technique, into one suitable for industry in several steps.

PROJECT BACKGROUND

While the previous standard methods of sorting glass using camera systems in the visible wavelength range are usually costly and only selective to a limited extent, Raman spectroscopy is an attractive alternative.

PROJECT CONTENT

Raman spectroscopy used to be regarded as purely for laboratory use because it was time consuming. In cooperation with TOMRA Sorting Solutions, the SAL researchers have now developed a prototype for an inspection system for sorting glass based on real-time Raman imaging spectroscopy that is suitable for industrial use. It is a non-destructive analysis technique which provides detailed information on the chemical structure, crystallinity and molecular interaction of a sample. We set about further developing the technology in a number of steps until it proved suitable for applications in industry and an attractive alternative to the methods used to date.

PROJECT FACTS

Multifirm project: Advanced Spectral Imaging Solutions
Programme: COMET
Partner: TOMRA Sorting Solutions, IPAC, MOLECULAR DEVICES
Sub-project: Industrial Raman Imaging Spectroscopy
Start: March 2010
Duration: 15 months

SHORT DESCRIPTION

During this project, we turned Raman spectroscopy, which was purely a laboratory technique, into one suitable for industry in several steps.