CFHT , Instruments , Spectroscopy , GriF , GriF

GriF: a 3D infrared integral Field Spectrograph
Diffraction limited spectroscopy in the K band

Note: GriF is no longer offered at CFHT

GriF is an upgrade to KIR that allows integral field spectroscopy in the K band, with a spatial resolution at the diffraction limit of the telescope (~0.12") using PUEO, the CFHT adaptive optics bonnette . It consists of a (warm) Fabry Perot interferometer, coupled with a grism in the KIR filter wheel, that disperses the Fabry Perot orders. A rectangular field selector in the focal plane (~6" x 36" on the sky) prevents the orders from overlapping spatially on the detector. For detailed information, please see the official site at DESPA or read a PASP paper

The Fabry Perot Perot mode will be available for 2004A, although narrow band filters will need to be used for order sorting . The focal plane wheel, which normally allows for coronography, long slit spectroscopy and the cross dispersed mode is undergoing major redesign and will not be available for 2004A.

Technical Data, Information, Images, Manuals:

For further information please contact Yann Clenet or Daniel Rouan
Created 13 February 01,
updated 14 Aug 03.

Page maintained by Olivier Lai.
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