PIGS on sky - dream or reality?

Stephan Kellner; Roberto Ragazzoni; Wolfgang Gassler; Emiliano Diolaiti; Jacopo Farinato; Carmelo Arcidiacono; Richard M. Myers; Tim J. Morris; Adriano Ghedina

doi:10.1117/12.566234

7 July 2004 PIGS on sky - dream or reality?

Stephan Kellner, Roberto Ragazzoni, Wolfgang Gassler, Emiliano Diolaiti, Jacopo Farinato, Carmelo Arcidiacono, Richard M. Myers, Tim J. Morris, Adriano Ghedina

Author Affiliations +

Proceedings Volume 5382, Second Backaskog Workshop on Extremely Large Telescopes; (2004) https://doi.org/10.1117/12.566234
Event: Second Backaskog Workshop on Extremely Large Telescopes, 2003, Backaskog, Sweden

Abstract

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.

Citation Download Citation

Stephan Kellner, Roberto Ragazzoni, Wolfgang Gassler, Emiliano Diolaiti, Jacopo Farinato, Carmelo Arcidiacono, Richard M. Myers, Tim J. Morris, and Adriano Ghedina "PIGS on sky - dream or reality?", Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); https://doi.org/10.1117/12.566234

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