Abstract
We describe the calibration method to be used for the off-axis laser guide stars at the Large Binocular Telescope's (LBT's) advanced Rayleigh guided ground layer adaptive optics system facility and the optical design of a dedicated calibration unit. Several possible solutions for generating artificial stars with the same wavefront as the real beacons were investigated. We find the use of a computer-generated hologram to be the best solution to the problem of producing aberrated light exactly matching that delivered by the primary mirror of the telescope. A detailed design and tolerance analysis is complete and the project is currently moving into the fabrication phase.
Original language | English |
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Pages (from-to) | G53-G59 |
Number of pages | 7 |
Journal | Applied Optics |
Volume | 49 |
Issue number | 31 |
DOIs | |
Publication status | Published - 1 Nov 2010 |
Externally published | Yes |