Linear dark field control: simulation for implementation and testing on the UA wavefront control testbed

Kelsey Miller; Olivier Guyon

doi:10.1117/12.2232120

2 September 2016 Linear dark field control: simulation for implementation and testing on the UA wavefront control testbed

Kelsey Miller, Olivier Guyon

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 99094G (2016) https://doi.org/10.1117/12.2232120
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

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.

Citation Download Citation

Kelsey Miller and Olivier Guyon "Linear dark field control: simulation for implementation and testing on the UA wavefront control testbed", Proc. SPIE 9909, Adaptive Optics Systems V, 99094G (2 September 2016); https://doi.org/10.1117/12.2232120

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available