High-contrast imaging with a self-coherent camera

Raphaël Galicher; Johan Mazoyer; Pierre Baudoz; Gérard Rousset

doi:10.1117/12.2025298

26 September 2013 High-contrast imaging with a self-coherent camera

Raphaël Galicher, Johan Mazoyer, Pierre Baudoz, Gérard Rousset

Proceedings Volume 8864, Techniques and Instrumentation for Detection of Exoplanets VI; 88640M (2013) https://doi.org/10.1117/12.2025298
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Direct imaging of exoplanets is very challenging because the planet is 10⁴ to 10¹⁰ fainter than the star at a separation of a fraction of arcsec. Several coronagraphs have been proposed to reduce the contrast ratio but their performance strongly depends on the level of phase and amplitude aberrations that induce speckles in the science image. An active control of the aberrations and a posteriori calibration are thus required to reach very high contrasts. Classical adaptive optics are not sufficient for this purpose because of non-common path aberrations. Our team proposed a self-coherent camera that spatially modulates the speckles in the science image. It is then possible to both actively control a deformable mirror and calibrate the residuals a posteriori. The current paper is an overview of the developments we have been working on for 7 years. We present the principle of the self-coherent camera, laboratory performance obtained in monochromatic light, and upgrades of the technique to make it achromatic.

Citation Download Citation

Raphaël Galicher, Johan Mazoyer, Pierre Baudoz, and Gérard Rousset "High-contrast imaging with a self-coherent camera", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640M (26 September 2013); https://doi.org/10.1117/12.2025298

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