SLM-based active focal-plane coronagraphy: status and future on-sky prospects

Jonas G. Kühn; Laurent Jolissaint; Audrey Bouxin; Polychronis Patapis

doi:10.1117/12.2562579

2 February 2021 SLM-based active focal-plane coronagraphy: status and future on-sky prospects

Jonas G. Kühn, Laurent Jolissaint, Audrey Bouxin, Polychronis Patapis

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114511S (2021) https://doi.org/10.1117/12.2562579
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We recently started to investigate how liquid-crystal on silicon (LCOS) spatial light modulator (SLM) would perform as programmable focal-plane phase mask (FPM) coronagraphs. Such “adaptive coronagraphs” could potentially help adapt to observing conditions, but also tackle specific science cases (e.g. binary stars). Active FPMs may play a role in the context of segmented telescope pupils, or to implement synchronous coherent differential imaging (CDI). We present a status update on this work, notably early broadband contrast performance results using our new Swiss Wideband Active Testbed for High-contrast imaging (SWATCHi) facility. Finally, we unveil the upcoming near-infrared PLACID instrument, the Programmable Liquid-crystal Adaptive Coronagraphic Imager for the 4-m DAG observatory in Turkey, with a first light planned for the end of the year 2022.

Conference Presentation

Citation Download Citation

Jonas G. Kühn, Laurent Jolissaint, Audrey Bouxin, and Polychronis Patapis "SLM-based active focal-plane coronagraphy: status and future on-sky prospects", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114511S (2 February 2021); https://doi.org/10.1117/12.2562579

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