Introduction to Detectors: Possible Status in
Introduction to Detectors: Possible Status in 2010-2020
K. W. Hodapp1 and D. N. B. Hall1
1 Institute for Astronomy, Universtiy of Hawaii
We will review recent developments and the current status of optical CCD detectors,
optical CMOS detector arrays, and near-infrared and mid-infrared detector
arrays.
The present state of the art for optical CCDs is set by devices being developed for wide-field survey projects such as LSST and Pan-STARRS.
These survey projects demand high quantum efficiency, in particular at long
optical wavelengths, and are being mosaiced together to form very large
focal planes. A novel technology is the orthogonal transfer CCD that allows
on-chip fast guiding.
A promising competing technology to CCDs are the CMOS Si-PIN array hybrids,
that hold the promise of simper operation and high quantum efficiency.
For near-infrared arrays, the state of the art is defined by the detectors
developed for the JWST detector competition. Abuttable detectors arrays with
extremely low dark currents, low noise, and good quantum efficiency have been
produced by the two competing vendors for this competition.
A novel approach to reading infrared detector arrays and other CMOS sensors is
the "application specific integrated circuit" (ASIC) developed by Rockwell. This
technology will greatly simplify the read-out electronics associated with detector arrays.
To extrapolate the current status about a decade into the future, we will
review technological and market drivers that will affect the development of
larger CCDs and infrared detector arrays, further improvements in their quality, and possible cost reductions.
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