Instrument Design of the MIRI
In the picture below, we can see how the MIRI will fix onto JWST.
In the picture below, we can see how the regions appear from the perspective of the MIRI
The imager and two spectrometer modules are based on all reflecting designs. Both the Imager and Spectrometer channels are fed by common optics from a single pick-off mirror placed close to the Telescope focal plane, and fed also by a common calibration subsystem. The pick-off mirror in front of the JWST OTA focal plane directs the MIRI FOV towards the imager. A small fold mirror adjacent to the imager light path picks off the small (up to 8 x 8 arcsec) fov of the spectrometer. A second tilting fold in the spectrometer optical path is used to select either light from the telescope or from the MIRI calibration system.
Primary Structure
Carbon-Fibre Reinforced Polymer hexapod
Imager
Input-Optics and Calibration Module
SMO -Spectrometer
MIRI overview