Progress on broadband control and deformable mirror tolerances in a 2-DM system

Tyler D. Groff, Alexis Carlotti, N. Jeremy Kasdin

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

4 Scopus citations

Abstract

Detection and Characterization of extrasolar terrestrial planets using coronagraphic techniques requires wavefront control algorithms to relax tolerances in a space-based observatory. To minimize the time spent correcting aberrations, the algorithms must function in broadband light. Two deformable mirrors in series can correct for both amplitude and phase aberrations. By taking a linear approximation of the propagation between the deformable mirrors we show an approach for broadband correction given a monochromatic estimate. We present progress in monochromatic light, initial experiments for broadband wavefront correction. We also address the additional challenges for a broadband controller such as limitations due to aberrations from spatial frequency folding that exhibit a wavelength squared dependence, which requires a third deformable mirror to correct in broadband. From these results we also discuss controllability of spatial frequencies and show its consequences for both monochromatic and broadband correction when using two deformable mirrors in series.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2010
Subtitle of host publicationOptical, Infrared, and Millimeter Wave
DOIs
StatePublished - Oct 27 2010
EventSpace Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7731
ISSN (Print)0277-786X

Other

OtherSpace Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

All Science Journal Classification (ASJC) codes

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

Keywords

  • Adaptive optics
  • Coronagraphy
  • Deformable mirrors

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