Physics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5901..347f&link_type=abstract
Solar Physics and Space Weather Instrumentation. Edited by Fineschi, Silvano; Viereck, Rodney A. Proceedings of the SPIE, Volume
Physics
Scientific paper
Recent possibility of building clusters of micro-satellites have increased the interest on extremely large space instruments. Since this growing is not merely a change of scale, performance of these new instruments has to be critically re-analyzed under this new perspective. As an example, diffraction effects can lead to new levels of signal-to-noise ratio, greatly increasing the possible performance of classical optical instruments. In this work we have analyzed the diffraction behavior of an opaque disc acting as external occulter in a space solar coronagraph. Since the occulter can be set at great distance from the telescope, improvements on signal-to-noise ratio are obtained. Moreover, this analysis can lead to a determination of a potential apodization function for the occulter.
Frassetto Fabio
Naletto Giampiero
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