First on-sky results, performance, and future of the HiCIBaS-LOWFS

Guillaume Allain; Denis Brousseau; Simon Thibault; Cédric Vallée; Mireille Ouellet; Jean-Pierre Véran; Olivier Daigle

doi:10.1117/12.2314354

17 July 2018 First on-sky results, performance, and future of the HiCIBaS-LOWFS

Guillaume Allain, Denis Brousseau, Simon Thibault, Cédric Vallée, Mireille Ouellet, Jean-Pierre Véran, Olivier Daigle

Proceedings Volume 10703, Adaptive Optics Systems VI; 107035T (2018) https://doi.org/10.1117/12.2314354
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

HiCIBaS-LOWFS is a spatially modulated pyramid wavefront sensor to be used on the HiCIBaS project, a high-contrast imaging balloon borne telescope, as a fine pointing and atmospheric turbulence sensor. Since the project will be using a relatively small telescope on a limited budget, creative solutions must be developed to respond to the requirements for such systems. For example, we need a linear response to large error in order to be able to correct for pointing error in a photon-limited regime caused by the telescope small size. Most solutions aren't well suited for the optical design in HiCIBaS since the high-contrast coronagraph and the Low-Order Wavefront Sensor (LOWFS) both run as separate instruments. The design is centered around the modification of existing pyramid wavefront sensor by adding static, spatial modulation to an otherwise unmodulated system. The spatial modulation is achieved by adding an axicon (a conical optical element) at an imaged telescope pupil plane. This has for effect to add a very large non- common path aberration between the imaging plane and the wavefront sensor. This has for effect to shape the point-spread function incident on the pyramid to a ring shape, which minimize diffraction effect on the apex of imperfect pyramids. We present the first lab results involving the wavefront sensor and its performances for wavefront reconstruction and pointing accuracy. We also discuss the first on-sky results that were recorded with the 1.6-m telescope at the Observatoire du Mont-Megantic in Qubec, Canada using Universite Lavals optical AO test-bench. These results pave the way to the design and integration of the wavefront sensor in the context of the HiCIBaS project.

Citation Download Citation

Guillaume Allain, Denis Brousseau, Simon Thibault, Cédric Vallée, Mireille Ouellet, Jean-Pierre Véran, and Olivier Daigle "First on-sky results, performance, and future of the HiCIBaS-LOWFS", Proc. SPIE 10703, Adaptive Optics Systems VI, 107035T (17 July 2018); https://doi.org/10.1117/12.2314354

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