Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope

E. Bendek, M. Hart, K. Powell, V. Vaitheeswaran, Donald W Mccarthy, C. Kulesa

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

Abstract

In this paper, we report the performance achieved by the multi laser guide star (LGS) implemented at the 6.5 m MMT telescope operating in Ground Layer Adaptive Optics mode. 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. We report a reduction in the width of the on-axis point-spread function from 1.07" to <0.2" in H band. Finally, we also describe the status of the development of least-squares Laser Tomography AO mode for the MMT laser system. In this case the reconstructor is obtained using simultaneous measurements of the wavefronts from the LGS and an additional natural guide star.

Original languageEnglish (US)
Title of host publicationAO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes
PublisherOffice National d'Etudes et de Recherches Aerospatiales, ONERA
StatePublished - 2011
Event2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011 - Victoria, BC, Canada
Duration: Sep 25 2011Sep 30 2011

Other

Other2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011
CountryCanada
CityVictoria, BC
Period9/25/119/30/11

Fingerprint

Adaptive optics
Telescopes
Tomography
Wavefronts
Lasers
Stars
Aberrations
Antenna grounds
Optical transfer function
Laser modes
Mirrors
Actuators
2-methylcyclopentadienyl manganese tricarbonyl

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Bendek, E., Hart, M., Powell, K., Vaitheeswaran, V., Mccarthy, D. W., & Kulesa, C. (2011). Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope. In AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes Office National d'Etudes et de Recherches Aerospatiales, ONERA.

Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope. / Bendek, E.; Hart, M.; Powell, K.; Vaitheeswaran, V.; Mccarthy, Donald W; Kulesa, C.

AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2011.

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

Bendek, E, Hart, M, Powell, K, Vaitheeswaran, V, Mccarthy, DW & Kulesa, C 2011, Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope. in AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011, Victoria, BC, Canada, 9/25/11.
Bendek E, Hart M, Powell K, Vaitheeswaran V, Mccarthy DW, Kulesa C. Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope. In AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA. 2011
Bendek, E. ; Hart, M. ; Powell, K. ; Vaitheeswaran, V. ; Mccarthy, Donald W ; Kulesa, C. / Ground Layer Adaptive Optics and advancements in Laser Tomography at the 6.5m MMT telescope. AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2011.
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