Demonstration of coronagraphs and wavefront control at the testbed EXIST

Naoshi Murakami; Mizuki Asano; Shunya Sato; Kenta Yoneta; Jun Nishikawa

doi:10.1117/12.3018382

23 August 2024 Demonstration of coronagraphs and wavefront control at the testbed EXIST

Naoshi Murakami, Mizuki Asano, Shunya Sato, Kenta Yoneta, Jun Nishikawa

Author Affiliations +

Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave; 1309220 (2024) https://doi.org/10.1117/12.3018382
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

We have built a laboratory testbed called the Exoplanet Imaging System Testbed (EXIST) to develop future highcontrast imaging technologies. The main objective of the EXIST is the development of broadband coronagraph and wavefront control techniques. The EXIST is equipped with several fiber-coupled laser and broadband light sources to model star and planets. A spatial light modulator (SLM) is used to carry out the wavefront control in front of the coronagraph. We incorporated a variety of coronagraphic masks, including four-quadrant, eightoctant, and 12-sector phase masks. These masks exhibit second-, fourth-, and sixth-order starlight suppression properties, respectively. When combined with the wavefront control, higher-order coronagraphic masks provided better dark hole contrast. This paper reports on recent experimental results and prospects for future technological development at the EXIST.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Naoshi Murakami, Mizuki Asano, Shunya Sato, Kenta Yoneta, and Jun Nishikawa "Demonstration of coronagraphs and wavefront control at the testbed EXIST", Proc. SPIE 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, 1309220 (23 August 2024); https://doi.org/10.1117/12.3018382

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