Whack-a-speckle

Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera

Matthew A. Kenworthy, Philip M Hinz, J Roger P Angel, Ari N. Heinze, Suresh Sivanandam

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

7 Citations (Scopus)

Abstract

Long exposures from adaptive optic systems show a diffraction limited core superimposed on a halo of uncorrected light from a science target, and the addition of various long-lived speckles that arise from uncorrected aberrations in the telescope system. The presence of these speckles limit the detection of extra-solar planets at a few diffraction widths from the primary source. Focal plane wavefront sensing uses the deformable secondary mirror of the MMT adaptive optics system to systematically remove the presence of long-lived speckles in a high-contrast image, and also test for the incoherent source that represents a separate astronomical target nearby. We use the Clio 5 micron camera (with its coronagraphic capabilities) to modulate long lived speckles and present initial on-sky results of this technique.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6272 II
DOIs
StatePublished - 2006
EventAdvances in Adaptive Optics II - Orlando, FL, United States
Duration: May 24 2006May 31 2006

Other

OtherAdvances in Adaptive Optics II
CountryUnited States
CityOrlando, FL
Period5/24/065/31/06

Fingerprint

Wavefronts
Speckle
adaptive optics
Mirrors
Cameras
cameras
mirrors
Adaptive optics
image contrast
extrasolar planets
diffraction
sky
aberration
halos
Diffraction
Extrasolar planets
telescopes
Aberrations
Telescopes

Keywords

  • Adaptive optics
  • Mid infra-red
  • Wavefront sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kenworthy, M. A., Hinz, P. M., Angel, J. R. P., Heinze, A. N., & Sivanandam, S. (2006). Whack-a-speckle: Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6272 II). [62723B] https://doi.org/10.1117/12.672577

Whack-a-speckle : Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera. / Kenworthy, Matthew A.; Hinz, Philip M; Angel, J Roger P; Heinze, Ari N.; Sivanandam, Suresh.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6272 II 2006. 62723B.

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

Kenworthy, MA, Hinz, PM, Angel, JRP, Heinze, AN & Sivanandam, S 2006, Whack-a-speckle: Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6272 II, 62723B, Advances in Adaptive Optics II, Orlando, FL, United States, 5/24/06. https://doi.org/10.1117/12.672577
Kenworthy MA, Hinz PM, Angel JRP, Heinze AN, Sivanandam S. Whack-a-speckle: Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6272 II. 2006. 62723B https://doi.org/10.1117/12.672577
Kenworthy, Matthew A. ; Hinz, Philip M ; Angel, J Roger P ; Heinze, Ari N. ; Sivanandam, Suresh. / Whack-a-speckle : Focal plane wavefront sensing in theory and practice with a deformable secondary mirror and 5-micron camera. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6272 II 2006.
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