Polychromatic compensation of propagated aberrations for high-contrast imaging

Laurent Pueyo, N. Jeremy Kasdin

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

We describe the influence of Fresnel propagation in apodized-pupil coronagraphs and introduce a methodology to compensate for propagated wavefront aberrations. We start from the Fresnel integral and derive an analytical closed form for the propagated field at an arbitrary distance from a pupil. In a second part, we show that the propagation of the coronagraphic term can be neglected with sufficiently oversized optics. Then we derive a λ-Fourier expansion of the aberration at an arbitrary plane in the optical train of a telescope. Finally, we present a series of wavefront actuators, based on multiple deformable mirrors, that possess adequate chromatic behavior to correct for the dominant terms of this expansion.

Original languageEnglish (US)
Pages (from-to)609-625
Number of pages17
JournalAstrophysical Journal
Volume666
Issue number1 I
DOIs
StatePublished - Jan 1 2007

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Instrumentation: adaptive optics
  • Instrumentation: high angular resolution

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