An optical shutter for the Euclid imager

Details An optical shutter for the Euclid imager An optical shutter for the Euclid imager

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7739e.115g&link_type=abstract

Modern Technologies in Space- and Ground-based Telescopes and Instrumentation. Edited by Atad-Ettedgui, Eli; Lemke, Dietrich.

Computer Science

Scientific paper

We present a first design study of the shutter mechanism to be implemented on the visible channel of the Euclid imager. The main functionality of the shutter is to obscure the light during the detector read-out and flat field calibration. Hence, the major design drivers are the number of open/close cycles of 160,000 and the opening/closing time of 5 sec without introducing a too large uncompensated momentum disturbance. The current design foresees to use two fully redundant actuators, which drive the shutter via a lever system. In case of an actuator failure, the blocked actuator can be disengaged via a fail-safe system.

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