7 March 2003 The CFHT MegaCam filter, shutter and roll pitch mechanisms.
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Abstract
MegaCam is an imaging CCD camera with a 1 square degree field of view for the new MegaPrime prime focus of the 3.6 meter Canada-France-Hawaii Telescope. This CCD camera is fixed on an aluminum structure, called Camembert for its shape, housing a shutter, a filter system and a roll pitch system to tune the CCD mosaic plane. The shutter is made with 1 meter diameter honeycomb half disks that rotates to covers or exposes the CCD mosaic. On this shutter a calibration source is fixed to monitor the CCD and its electronics. The filter system is made of a jukebox with a capacity of eight 30 cm square filters and of a loading arm to place them under the field of view. The instrument was delivered to the CFHT observatory on June 10, 2002 and first light is scheduled in October 2002.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephan Aune, Olivier Boulade, Xavier Charlot, P. Abbon, Pierre Borgeaud, Pierre-Henri Carton, M. Carty, J. Da Costa, D. Desforge, H. Deschamps, Dominique Eppelle, Pascal Gallais, L. Gosset, Remy Granelli, Michel Gros, Jean de Kat, Denis Loiseau, J. L. Ritou, Jean Yves Rousse, Pierre Starzynski, Nicolas Vignal, and Laurent G. Vigroux "The CFHT MegaCam filter, shutter and roll pitch mechanisms.", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.460316; https://doi.org/10.1117/12.460316
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