IRIS Design and Capabilities: A Diffraction-Limited Infrared Imaging Spectrograph for the Thirty Meter Telescope

Details IRIS Design and Capabilities: A Diffraction-Limited Infrared Imaging Spectrograph for the Thirty Meter Telescope IRIS Design and Capabilities: A Diffraction-Limited Infrared Imaging Spectrograph for the Thirty Meter Telescope

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544124l&link_type=abstract

American Astronomical Society, AAS Meeting #215, #441.24; Bulletin of the American Astronomical Society, Vol. 42, p.405

Physics

Optics

Scientific paper

We present the design of IRIS, an infrared (0.85 - 2.5 μm) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). The integral field spectrograph will utilize both an infrared transmissive lenslet array with a spatial sampling of 0.004" and 0.009", and an image slicer using stacked plane mirrors to achieve a spatial sampling of 0.025" and 0.05". The instrument is designed to have low wavefront error (< 30nm) in order to sample the high angular resolution achieved from the TMT narrow field infrared adaptive optics system (NFIRAOS). The imaging camera within IRIS will have a 0.004" spatial sampling with a collective field of view of 17.2"x17.2", and will achieve a relative and absolute astrometric accuracy of 30 μas and 2 mas. We will summarize predicted point source and resolved object sensitivities achieved with both the integral field spectrograph and imager. At first light, IRIS coupled to NFIRAOS and TMT will be the highest angular resolution imaging spectrograph ever built.

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