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 language | English |
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Title of host publication | 1st International Conference on Adaptive Optics for Extremely Large Telescopes (AO4ELT) |
Subtitle of host publication | proceedings |
Editors | Y. Clenet, J. M. Conan, T. Fusco, G. Rousset |
Place of Publication | France |
Publisher | EDP Sciences |
Pages | 04007-1-04007-5 |
Number of pages | 5 |
ISBN (Print) | 9782759804962 |
DOIs | |
Publication status | Published - 2010 |
Externally published | Yes |
Event | Conference on Adaptive Optics for Extremely Large Telescopes (1st : 2009) - Paris, France Duration: 22 Jun 2009 → 26 Jun 2009 |
Conference
Conference | Conference on Adaptive Optics for Extremely Large Telescopes (1st : 2009) |
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City | Paris, France |
Period | 22/06/09 → 26/06/09 |