Dual purpose focal plane masks for contemporaneous wavefront sensing and high-contrast imaging: hardware status

James Kent Wallace; Garreth Ruane; Nasrat Raouf; Tobias S. Wenger; A.J. Riggs; Jeffrey B. Jewell; Daniel N. Shanks

doi:10.1117/12.3020700

24 August 2024 Dual purpose focal plane masks for contemporaneous wavefront sensing and high-contrast imaging: hardware status

James Kent Wallace, Garreth Ruane, Nasrat Raouf, Tobias S. Wenger, A.J. Riggs, Jeffrey B. Jewell, Daniel N. Shanks

Author Affiliations +

Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave; 1309264 (2024) https://doi.org/10.1117/12.3020700
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Direct detection of earth-like planets using an internal coronagraph will require telescope wavefront stability on the order of ~ 10 picometers over a time scale of ~ 10 minutes. Passive wavefront stability of a space telescope at this level has never been demonstrated, yet active sensing and control is feasible. However, the sensing must be done during the science observation, and with a minimum of non-common path errors. The sensing and control must be done where it matters most – at the location of the focal plane mask. We have architected such a device, that will enable both of these capabilities. There are three key components of this optical element: 1) the coronagraphic field stop 2) the Zernike phase dimple and 3) the dielectric coating/antireflection surface. We will discuss the design and engineering of these key components, with an emphasis on the first iteration of the actual devices. We will also provide characterization of these devices in our metrology setup. Status of the testing and characterization of these devices in the vacuum, high-contrast optical testbed will also be discussed.

Citation Download Citation

James Kent Wallace, Garreth Ruane, Nasrat Raouf, Tobias S. Wenger, A.J. Riggs, Jeffrey B. Jewell, and Daniel N. Shanks "Dual purpose focal plane masks for contemporaneous wavefront sensing and high-contrast imaging: hardware status", Proc. SPIE 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, 1309264 (24 August 2024); https://doi.org/10.1117/12.3020700

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