Latest GLAO results and advancements in laser tomography implementation at the 6.5m MMT telescope

Eduardo A. Bendek, Michael Hart, Keith B. Powell, Vidhya Vaitheeswaran, Don McCarthy, Craig Kulesa

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

5 Scopus citations

Abstract

Laser tomography capability using a multi laser guide star (LGS) system is being implemented at the 6.5 m MMT telescope on Mt. Hopkins, AZ. The system uses five range-gated and dynamically refocused Rayleigh laser beacons to sense the atmospheric wavefront aberration. Corrections are then applied to the wavefront using the 336-actuator adaptive secondary mirror of the telescope. So far, the system has demonstrated successful control of ground-layer aberration over a field of view substantially wider than is delivered by conventional adaptive optics. In this paper, we report the latest results from this mode of operation, using for the first time a plate scale on our IR science camera that samples the diffraction scale at the Nyquist limit. We also discuss findings for a reduction in the width of the on-axis point-spread function from 1.07" to <0.2" in H band and present the progress achieved toward the implementation of laser tomography. This will be attempted by means of a least squares reconstructor, which is obtained using simultaneous measurements of the wavefronts from the LGS and an additional natural guide star.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8149
DOIs
Publication statusPublished - 2011
EventAstronomical Adaptive Optics Systems and Applications IV - San Diego, CA, United States
Duration: Aug 21 2011Aug 24 2011

Other

OtherAstronomical Adaptive Optics Systems and Applications IV
CountryUnited States
CitySan Diego, CA
Period8/21/118/24/11

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Keywords

  • Adaptive Optics
  • Ground Layer Adaptive Optics
  • Laser Tomography
  • Rayleigh lasers

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Bendek, E. A., Hart, M., Powell, K. B., Vaitheeswaran, V., McCarthy, D., & Kulesa, C. (2011). Latest GLAO results and advancements in laser tomography implementation at the 6.5m MMT telescope. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8149). [814907] https://doi.org/10.1117/12.894149