MIRI is one of three instruments on the James Webb Space Telescope (JWST) and will provide imaging, spectroscopy and coronagraphy at wavelengths of 5 to 28 \xB5m. The project is an international partnership (50 / 50) between JPL and a nationally funded consortium of European institutes, working with ESA and NASA.
The MIRI European Consortium Webpage gives more information on the instrument and the consortium organisation.The MIRI test team is responsible for the characterisation and calibration of the MIRI instrument.