The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor

Glenn A. Howe; Christopher B. Mendillo; Kuravi Hewawasam; Jason Martel; Susanna C. Finn; Timothy A. Cook; Supriya Chakrabarti

doi:10.1117/12.2274122

1 September 2017 The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor

Glenn A. Howe, Christopher B. Mendillo, Kuravi Hewawasam, Jason Martel, Susanna C. Finn, Timothy A. Cook, Supriya Chakrabarti

Author Affiliations +

Proceedings Volume 10400, Techniques and Instrumentation for Detection of Exoplanets VIII; 104001Z (2017) https://doi.org/10.1117/12.2274122
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

The Planetary Imaging Concept Testbed Using a Recoverable Experiment - Coronagraph (PICTURE-C) mission will directly image debris disks and exozodiacal dust around three nearby stars from a high-altitude balloon using a vector vortex coronagraph. We present experimental results of the PICTURE-C low-order wavefront control (LOWFC) system utilizing a Shack-Hartmann (SH) sensor in an instrument testbed. The SH sensor drives both the alignment of the telescope secondary mirror using a 6-axis Hexapod and a surface parallel array deformable mirror to remove residual low-order aberrations. The sensor design and actuator calibration methods are discussed and the preliminary LOWFC closed-loop performance is shown to stabilize a reference wavefront to an RMS error of 0.30 ± 0.29 nm.

Citation Download Citation

Glenn A. Howe, Christopher B. Mendillo, Kuravi Hewawasam, Jason Martel, Susanna C. Finn, Timothy A. Cook, and Supriya Chakrabarti "The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor", Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001Z (1 September 2017); https://doi.org/10.1117/12.2274122

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