Speckle identification to assist the direct detection of exoplanets

Elizabeth J. Young, N. Jeremy Kasdin, A. Carlotti, M. Littman, M. C. Noecker

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

1 Scopus citations


Current observations in the context of exoplanet searches with coronagraphic instruments have shown that one of the main limitations to high-contrast imaging is due to residual quasi-static speckles. Speckles look like the image of a planet, but they have a different spectral behavior and are optically coherent with the star. We present two techniques to distinguish a planet from speckles. We are assuming that the optical path can be changed enough so that the speckles will change significantly between each image and therefore our model of each image having an independent source of aberrations (creating a new speckle pattern) from the other images is a good model. In the future, we would like to design and build a testbed suitable for coherent speckle detection studies. There are two techniques we want to apply to create the necessary multiple images with changing speckle patterns. The first is to use images generated using our existing deformable mirror (DM) control algorithm and the second is to put deliberate shapes on the DM to achieve the desired speckle pattern outcome.

Original languageEnglish (US)
Title of host publicationTechniques and Instrumentation for Detection of Exoplanets V
StatePublished - 2011
EventTechniques and Instrumentation for Detection of Exoplanets V - San Diego, CA, United States
Duration: Aug 23 2011Aug 24 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherTechniques and Instrumentation for Detection of Exoplanets V
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

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


  • Exoplanets
  • High Contrast Imaging
  • Speckles


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