InfraRed Imaging Spectrograph (IRIS)

InfraRed Imaging Spectrograph (IRIS) is one of the three first light instruments that will be available when TMT construction is completed. IRIS is an infrared imager with an integral field unit that snaps diffraction-limited images and spectra in the wavelength range of 0.84 to 2.4 10μm. IRIS combined with TMT will enable it to attain 4 times the resolution and 200 times the sensitivity of the Subaru Telescope, revealing a whole new universe with unprecedented precision.

IRIS development at ATC

The development of IRIS wi l l be a collaborative effort of the United States, Japan, and Canada. The Advanced Technology Center will play a central role in the design, construction, and performance evaluation of the IRIS imaging system. The imaging system of IRIS is 2.3 meters in length and the interior of its entire vacuum enclosure is cooled to the temperature of liquid nitrogen. To guarantee the longevity of its performance, the system must be built to be maintenance free for at least 10 years. As stable operation of such a large cooled optics system is a challenging issue, the design and development of prototypes is currently underway utilizing the experience acquired in the developments of HSC and the focal plane instruments aboard the Subaru Telescope in the Advanced Technology Center.

Conceptual image of IRIS (Right) . The purple section represents the vacuum enclosure in which the cryogenic optics and detector are installed. The IRIS imaging system is 2.3 meters long (Left).
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