Rapid Testing of Food Quality (IMAGE) Fraunhofer-Gesellschaft Caption Complete with integrated diffraction grating, grating drive, position detector and optical gaps, the spectrometer is much more compact than those currently available in the market. Credit Fraunhofer IPMS Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.