PIGS on sky - dream or reality?

Details PIGS on sky - dream or reality? PIGS on sky - dream or reality?

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5382..520k&link_type=abstract

Second Backaskog Workshop on Extremely Large Telescopes. Edited by Ardeberg, Arne L.; Andersen, Torben. Proceedings of the SPI

Physics

1

Scientific paper

Since several problems of Laser Guide Stars, like conical anisoplanatism, perspective elongation, etc., scales with the telescope diameter, the use of artificial stars will become more difficult with apertures in the range of ELTs. Problems with Laser Guide Stars are reviewed and a way is shown how to overcome most of these difficulties with the concept of Pseudo Infinity Guide Stars (PIGS). A new kind of wavefront sensor is introduced taking advantage of the concept by the means of two optical devices, a reflecting rod and a mask. We explain this novel wavefront sensor, show results of a laboratory experiment, and conclude in further steps to apply the concept with full MCAO capability.

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