Abstract
The tip-tilt correction system at the Infrared Optical Telescope Array
(IOTA) has been upgraded with a new star tracker camera. The camera
features a backside-illuminated CCD chip offering doubled overall
quantum efficiency and a four times higher system gain compared to the
previous system. Tests carried out to characterize the new system showed
a higher system gain with a lower read-out noise electron level. Shorter
read-out cycle times now allow to compensate tip-tilt fluctuations so
that their error imposed on visibility measurements becomes comparable
to, and even smaller than, that of higher-order aberrations.
Original language | English |
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Pages (from-to) | 1137 |
Journal | New Frontiers in Stellar Interferometry, Proceedings of SPIE Volume 5491. Edited by Wesley A. Traub. Bellingham, WA: The International Society for Optical Engineering, 2004., p.1137 |
Volume | 5491 |
Publication status | Published - 1 Oct 2004 |