PROJECT SITE:

You are here!

Official site of the design, build, test and launch of JWST.

SCIENCE SITE:

webbtelescope.org

JWST Science overview, future home of science data and images.

NASA HQ SITE:

www.nasa.gov/jwst

Overview of the spacecraft, mission and science of JWST.

JWST related content on the NASA HOME PAGE plus links to NASA’s other great activities and missions.

MISSIONS:

JWST related Missions.

MORE NASA:

News, Careers, Locations & more.


Mid-Infrared Instrument (MIRI)

Status:

All four flight science instruments were integrated into the ISIM structure by March 2014.

JWST Team Photo with Completed Flight Instrument module

Learn More About MIRI:

The Mid-Infrared Instrument (MIRI) has both a camera and a spectrograph that sees light in the mid-infrared region of the electromagnetic spectrum, with wavelengths that are longer than our eyes see.

Instrument wavelength ranges

MIRI covers the wavelength range of 5 to 28 microns. Its sensitive detectors will allow it to see the redshifted light of distant galaxies, newly forming stars, and faintly visible comets as well as objects in the Kuiper Belt. MIRI's camera will provide wide-field, broadband imaging that will continue the breathtaking astrophotography that has made Hubble so universally admired. The spectrograph will enable medium-resolution spectroscopy, providing new physical details of the distant objects it will observe. (Read more about spectroscopy on the NIRSpec page.)

MIRI

MIRI is being built by the MIRI Consortium, a group that consists of scientists and engineers from European countries, a team from the Jet Propulsion Lab in California, and scientists from several U.S. institutions.

Links & Resources:

Image Gallery View our MIRI image gallery.
Web cam Watch on our "Webb-cam"!

Technical Details for MIRI:

The MIRI has three Arsenic-doped Silicon (Si:As) detector arrays. The camera module provides wide-field broadband imagery, and the spectrograph module provides medium-resolution spectroscopy over a smaller field of view compared to the imager. The nominal operating temperature for the MIRI is 7K. This level of cooling cannot be attained using the passive cooling provided by the Thermal Management Subsystem. Instead, there is a two-step process: A Pulse Tube precooler gets the instrument down to 18K; and a Joule-Thomson Loop heat exchanger knocks it down to 7K.