A CMOS Sensor for Solar Observation

摘要

CALAS is an instrument whose purpose is to observe a large field of view with a very high spatial resolution at the highest temporal cadence, so as to ideally sample the Earth atmospheric distortion. The aim of this project is the study of the dynamics of solar supergranulation. It will be installed on the "Lunette Jean R?sch" (a 50 cm diameter refractor) at the Pic du Midi Observatory. We chose a 3952×4064 pixel monolithic CMOS detector, and in this paper explain the reasons to use such a detector for this niche of solar observation. We also briefly describe the controller, acquisition system and optomechanical parts of the instrument. More information on the project can be found at http://bass2000.bagn.obs-mip.fr/calas/.