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 Scopus citations

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
Publication statusPublished - 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

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