Optical design of FRIDA, the integral-field spectrograph and imager for the AO system of the Gran Telescopio Canarias
2008
FRIDA (inFRared Imager and Dissector for the Adaptive optics system of the Gran Telescopio Canarias) has been
designed as a diffraction limited instrument that will offer broad and narrow band imaging and integral field
spectroscopy (IFS) capabilities with low, intermediate and high spectral resolutions to operate in the wavelength range
0.9 - 2.5 μm. The integral field unit is based on a monolithic image slicer based on the University of Florida FISICA.
Both, the imaging mode and IFS observing modes will use the same Rockwell 2K×2K detector. FRIDA will be based at
a Nasmyth focus of GTC, behind the GTCAO system. The FRIDA optical design, stray light analysis, tolerance analysis
and manufacturing feasibility are described in this contribution.
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