1 September 2017 The low-order wavefront control system for the PICTURE-C mission: preliminary testbed results from the Shack-Hartmann sensor
Author Affiliations +
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.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Glenn A. Howe, Christopher B. Mendillo, Kuravi Hewawasam, Jason Martel, Susanna C. Finn, Timothy A. Cook, 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); doi: 10.1117/12.2274122; https://doi.org/10.1117/12.2274122
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT

Status of the NGS adaptive optic system at the MMT...
Proceedings of SPIE (October 25 2004)
Wavefront control system for the Keck telescope
Proceedings of SPIE (September 11 1998)
Adaptive optics at the IOE, CAS
Proceedings of SPIE (February 23 2009)
A Near Infrared Astronomical Adaptive Optics System
Proceedings of SPIE (September 20 1989)
Upgrade on 61 element adaptive optical system for 1.2 m...
Proceedings of SPIE (October 25 2004)

Back to Top