IDID Test (IMAGE) Southwest Research Institute Caption Southwest Research Institute developed an internal diesel injector deposit test which uses the Institute's new variable angle spectroscopic ellipsometer (VASE) to measure deposits, a tool ordinarily used by computer engineers to examine layers in microchips. Credit Southwest Research Institute Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only 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.