Share Email Print
cover

Proceedings Paper

The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.

Paper Details

Date Published: 1 September 2017
PDF: 9 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104001Z (1 September 2017); doi: 10.1117/12.2274122
Show Author Affiliations
Glenn A. Howe, Univ. of Massachusetts Lowell (United States)
Christopher B. Mendillo, Univ. of Massachusetts Lowell (United States)
Kuravi Hewawasam, Univ. of Massachusetts Lowell (United States)
Jason Martel, Univ. of Massachusetts Lowell (United States)
Susanna C. Finn, Univ. of Massachusetts Lowell (United States)
Timothy A. Cook, Univ. of Massachusetts Lowell (United States)
Supriya Chakrabarti, Univ. of Massachusetts Lowell (United States)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

© SPIE. Terms of Use
Back to Top