The self-coherent camera-phasing sensor : from numerical simulations to early experiments

P. Janin-Potiron; P. Martinez; P. Baudoz; M. Carbillet; C. Gouvret; A. Spang

doi:10.1117/12.2232687

27 July 2016 The self-coherent camera-phasing sensor : from numerical simulations to early experiments

P. Janin-Potiron, P. Martinez, P. Baudoz, M. Carbillet, C. Gouvret, A. Spang

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 99066B (2016) https://doi.org/10.1117/12.2232687
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Extremely Large Telescopes (ELTs) are the next technological step when considering astrophysical observation. They will provide unprecedented angular resolution, thus improving the imaging capability and hopefully allow the imaging of the first Earth-like exoplanet. For technological and mechanical reasons, the primary mirror of these instruments will have to be segmented. To reach the image quality needed for the most demanding observational programs, the segments must be kept aligned below tens of nm RMS. The development of cophasing technics is of prime importance for the next generation of space- and ground-based segmented telescopes. We propose to describe in this paper a new focal plane cophasing sensor that exploits the scientific image of a coronagraphic instrument to retrieve simultaneously piston and tip-tilt misalignments. It is based on the self- coherent camera (SCC) principle and provides a non-invasive system and an efficient phasing sensor from the image domain. Numerical simulations have successfully demonstrated the proper functioning of this system and its algorithms. Along this, work to implement and test the self-coherent camera - phasing sensor (SCC-PS) is currently ongoing and a first look at the cophasing stage of the Segmented Pupil Experiment for Exoplanet Detection (SPEED) will be proposed.

Citation Download Citation

P. Janin-Potiron, P. Martinez, P. Baudoz, M. Carbillet, C. Gouvret, and A. Spang "The self-coherent camera-phasing sensor : from numerical simulations to early experiments", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99066B (27 July 2016); https://doi.org/10.1117/12.2232687

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