Design of an holographic off-axis calibration light source for ARGOS at the LBT

Christian Schwab, Wolfgang Gässler, Diethard Peter, Thomas Blümchen, Simon Aigner, Andreas Quirrenbach

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

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Abstract

We report on the design of an artificial light source for ARGOS, the multiple Rayleigh laser guide star (LGS) facility at the Large Binocular Telescope (LBT). Our light source mimics the expected night-time illumination of the adaptive secondary mirror (ASM) by the laser beacons very accurately and provides a way to check the achieved performance, allowing thorough testing of the system during day time. The optical design makes use of computer generated holograms (CGH) and strong aspheres to achieve a very small residual wavefront error. Additional structures on the CGH facilitate quick and precise alignment of the optics in the prime focus. We demonstrate that the scheme can be applied to the current European Extremely Large Telescope (E-ELT) design in a similar way.
Original languageEnglish
Title of host publication1st International Conference on Adaptive Optics for Extremely Large Telescopes (AO4ELT)
Subtitle of host publicationproceedings
EditorsY. Clenet, J. M. Conan, T. Fusco, G. Rousset
Place of PublicationFrance
PublisherEDP Sciences
Pages04007-1-04007-5
Number of pages5
ISBN (Print)9782759804962
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventConference on Adaptive Optics for Extremely Large Telescopes (1st : 2009) - Paris, France
Duration: 22 Jun 200926 Jun 2009

Conference

ConferenceConference on Adaptive Optics for Extremely Large Telescopes (1st : 2009)
CityParis, France
Period22/06/0926/06/09

Bibliographical note

Copyright the Author(s) 2010. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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    Schwab, C., Gässler, W., Peter, D., Blümchen, T., Aigner, S., & Quirrenbach, A. (2010). Design of an holographic off-axis calibration light source for ARGOS at the LBT. In Y. Clenet, J. M. Conan, T. Fusco, & G. Rousset (Eds.), 1st International Conference on Adaptive Optics for Extremely Large Telescopes (AO4ELT): proceedings (pp. 04007-1-04007-5). France: EDP Sciences. https://doi.org/10.1051/ao4elt/201004007