Closed loop, DM diversity-based, wavefront correction algorithm for high contrast imaging systems

Amir Give'on, Ruslan Belikov, Stuart Shaklan, Jeremy Kasdin

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

High contrast imaging from space relies on coronagraphs to limit diffraction and a wavefront control systems to compensate for imperfections in both the telescope optics and the coronagraph. The extreme contrast required (up to 10-10 for terrestrial planets) puts severe requirements on the wavefront control system, as the achievable contrast is limited by the quality of the wavefront. This paper presents a general closed loop correction algorithm for high contrast imaging coronagraphs by minimizing the energy in a predefined region in the image where terrestrial planets could be found. The estimation part of the algorithm reconstructs the complex field in the image plane using phase diversity caused by the deformable mirror. This method has been shown to achieve faster and better correction than classical speckle nulling.

Original languageEnglish (US)
Pages (from-to)12338-12343
Number of pages6
JournalOptics Express
Volume15
Issue number19
DOIs
StatePublished - Sep 17 2007

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Closed loop, DM diversity-based, wavefront correction algorithm for high contrast imaging systems'. Together they form a unique fingerprint.

Cite this