Cooled Infrared Dichroic Beamsplitters and Filters for the MIRI Spectrometer and Imager (5-29µm)

  • Gary J. Hawkins, Richard E. Sherwood, Barbara M. Barrett
  • January 2007, Optical Society of America (OSA)
  • DOI: 10.1364/oic.2007.wdpdp1

Cooled Infrared Filters For Space Telescopes

What is it about?

The Mid-Infrared Instrument (MIRI) is a cooled (7K) thermal-infrared imager and medium resolution spectrometer being developed for launch on the JWST (James Webb Space Telescope) in 2018 by an international consortium of European partners sponsored by the European Space Agency, the Jet Propulsion Laboratory and an international science team.

Why is it important?

The spectral design, manufacture and testing of the JWST MIRI dichroic beamsplitters and filters have been described, together with the choice of substrate and coating materials. The completed filters have been fully accepted in compliance with the specified instrument requirements and are being assembled for integration and launch.


Dr Gary J Hawkins
University of Reading

The University of Reading is responsible for the design and fabrication of the long-wave pass dichroic beamsplitters in the spectrometer sub-system (5-29µm) together with a set of bandpass filters (13-29µm), and coronagraphic filter (23µm) for the wide-field imaging camera.

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The following have contributed to this page: Dr Gary J Hawkins