Fast linearized coronagraph optimizer (FALCO) IV: coronagraph design survey for obstructed and segmented apertures

G. Ruane; A. Riggs; C. T. Coker; S. B. Shaklan; E. Sidick; D. Mawet; J. Jewell; K. Balasubramanian; C. C. Stark

doi:10.1117/12.2312973

21 August 2018 Fast linearized coronagraph optimizer (FALCO) IV: coronagraph design survey for obstructed and segmented apertures

G. Ruane, A. Riggs, C. T. Coker, S. B. Shaklan, E. Sidick, D. Mawet, J. Jewell, K. Balasubramanian, C. C. Stark

Author Affiliations +

Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave; 106984U (2018) https://doi.org/10.1117/12.2312973
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Coronagraph instruments on future space telescopes will enable the direct detection and characterization of Earth-like exoplanets around Sun-like stars for the first time. The quest for the optimal optical coronagraph designs has made rapid progress in recent years thanks to the Segmented Coronagraph Design and Analysis (SCDA) initiative led by the Exoplanet Exploration Program at NASA's Jet Propulsion Laboratory. As a result, several types of high-performance designs have emerged that make use of dual deformable mirrors to (1) correct for optical aberrations and (2) suppress diffracted starlight from obstructions and discontinuities in the telescope pupil. However, the algorithms used to compute the optimal deformable mirror surface tend to be computationally intensive, prohibiting large scale design surveys. Here, we utilize the Fast Linearized Coronagraph Optimizer (FALCO), a tool that allows for rapid optimization of deformable mirror shapes, to explore trade-offs in coronagraph designs for obstructed and segmented space telescopes. We compare designs for representative shaped pupil Lyot and vortex coronagraphs, two of the most promising concepts for the LUVOIR space mission concept. We analyze the optical performance of each design, including their throughput and ability to passively suppress light from partially resolved stars in the presence of low-order aberrations. Our main result is that deformable mirror based apodization can suffciently suppress diffraction from support struts and inter-segment gaps whose widths are on the order of ~0.1% of the primary mirror diameter to detect Earth-sized planets within a few tens of milliarcseconds from the star.

Citation Download Citation

G. Ruane, A. Riggs, C. T. Coker, S. B. Shaklan, E. Sidick, D. Mawet, J. Jewell, K. Balasubramanian, and C. C. Stark "Fast linearized coronagraph optimizer (FALCO) IV: coronagraph design survey for obstructed and segmented apertures", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106984U (21 August 2018); https://doi.org/10.1117/12.2312973

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