Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5171..316r&link_type=abstract
Telescopes and Instrumentation for Solar Astrophysics. Edited by Fineschi, Silvano; Gummin, Mark A. Proceedings of the SPIE,
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
This paper describes a versatile camera designed to operate at high frame rates of > 2kHz. Such high frame rates are required to reduce the latency, i.e., achieve high bandwidth in a solar adaptive optics application. The camera was designed around a 1280x1024 pixel CMOS 10-bit sensor with a readout rate of 2 microseconds per row. The output is switchable between a standard Camera Link interface with four 10-bit ports (standard camera mode) and a non-standard Camera Link interface with twelve 8-bit ports (adaptive optics mode). The programmable camera interface maps blocks of pixels to output ports enabling multiple regions of interest. This mode is of particular interest for solar multi-conjugate adaptive optics (MCAO). The speed of the camera is determined by the number of rows of pixels needed in the application. For example, a 200x200 pixel sub-array that is needed for the 97-actuator solar adaptive optics system at the Dunn Solar Telescope can be read out at a rate of 2.5kHz. Camera design and performance will be discussed.
Chen Jianxin
Hill Reuben
Richards Kit
Rimmele Thomas R.
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