Rayleigh laser guide star calibration unit for the Large Binocular Telescope

Christian Schwab, Andrew Rakich

Research output: Contribution to journalArticleResearchpeer-review

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.

LanguageEnglish
PagesG53-G59
Number of pages7
JournalApplied Optics
Volume49
Issue number31
DOIs
Publication statusPublished - 1 Nov 2010
Externally publishedYes

Fingerprint

laser guide stars
Binoculars
Telescopes
Stars
Calibration
telescopes
design analysis
beacons
Optical design
Adaptive optics
Antenna grounds
Lasers
Holograms
Wavefronts
adaptive optics
Mirrors
mirrors
Fabrication
stars
fabrication

Cite this

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Rayleigh laser guide star calibration unit for the Large Binocular Telescope. / Schwab, Christian; Rakich, Andrew.

In: Applied Optics, Vol. 49, No. 31, 01.11.2010, p. G53-G59.

Research output: Contribution to journalArticleResearchpeer-review

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