TY - GEN
T1 - Linear dark field control
T2 - Adaptive Optics Systems V
AU - Miller, Kelsey
AU - Guyon, Olivier
N1 - Publisher Copyright:
© 2016 SPIE.
PY - 2016
Y1 - 2016
N2 - This paper presents the early-stage simulation results of linear dark field control (LDFC) as a new approach to maintaining a stable dark hole within a stellar post-coronagraphic PSF. In practice, conventional speckle nulling is used to create a dark hole in the PSF, and LDFC is then employed to maintain the dark field by using information from the bright speckle field. The concept exploits the linear response of the bright speckle intensity to wavefront variations in the pupil, and therefore has many advantages over conventional speckle nulling as a method for stabilizing the dark hole. In theory, LDFC is faster, more sensitive, and more robust than using conventional speckle nulling techniques, like electric field conjugation, to maintain the dark hole. In this paper, LDFC theory, linear bright speckle characterization, and first results in simulation are presented as an initial step toward the deployment of LDFC on the UA Wavefront Control testbed in the coming year.
AB - This paper presents the early-stage simulation results of linear dark field control (LDFC) as a new approach to maintaining a stable dark hole within a stellar post-coronagraphic PSF. In practice, conventional speckle nulling is used to create a dark hole in the PSF, and LDFC is then employed to maintain the dark field by using information from the bright speckle field. The concept exploits the linear response of the bright speckle intensity to wavefront variations in the pupil, and therefore has many advantages over conventional speckle nulling as a method for stabilizing the dark hole. In theory, LDFC is faster, more sensitive, and more robust than using conventional speckle nulling techniques, like electric field conjugation, to maintain the dark hole. In this paper, LDFC theory, linear bright speckle characterization, and first results in simulation are presented as an initial step toward the deployment of LDFC on the UA Wavefront Control testbed in the coming year.
KW - Electric field conjugation (EFC)
KW - Linear dark field control (LDFC)
KW - Speckle nulling
KW - Wavefront control
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UR - http://www.scopus.com/inward/citedby.url?scp=85002509816&partnerID=8YFLogxK
U2 - 10.1117/12.2232120
DO - 10.1117/12.2232120
M3 - Conference contribution
AN - SCOPUS:85002509816
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Adaptive Optics Systems V
A2 - Marchetti, Enrico
A2 - Veran, Jean-Pierre
A2 - Close, Laird M.
PB - SPIE
Y2 - 26 June 2016 through 1 July 2016
ER -