  Euclid is the second medium-size mission (M2) of the ESA Cosmic Vision
Program, currently scheduled for a launch in 2020. The two instruments on-board
Euclid, VIS (VISible imager) and NISP (Near Infrared Spectrometer and
Photometer), will provide key measurements to investigate the nature of dark
energy, advancing our knowledge on cosmology. We present in this contribution
the development and manufacturing status of the VIS Read-out Shutter Unit,
whose main function is to prevent direct light from falling onto the VIS CCDs
during the read-out of the scientific exposures and to allow the
dark-current/bias calibrations of the instrument.
