Rayleigh laser guide star calibration unit for the Large Binocular Telescope

Christian Schwab*, Andrew Rakich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 languageEnglish
Pages (from-to)G53-G59
Number of pages7
JournalApplied Optics
Issue number31
Publication statusPublished - 1 Nov 2010
Externally publishedYes


Dive into the research topics of 'Rayleigh laser guide star calibration unit for the Large Binocular Telescope'. Together they form a unique fingerprint.

Cite this