On-sky results of focal-plane wavefront sensing and control with the asymmetric pupil vector-apodizing phase plate coronagraph

Steven P. Bos; Kelsey L. Miller; Julien Lozi; Olivier Guyon; Vikram M. Radhakrishnan; Emiel H. Por; Christoph U. Keller; David Doelman; Sebastien Vievard; Ananya Sahoo; Vincent Deo; Thayne Currie; Nemanja Jovanovic; Frantz Martinache; Matthew A. Kenworthy; Frans Snik

doi:10.1117/12.2562294

13 December 2020 On-sky results of focal-plane wavefront sensing and control with the asymmetric pupil vector-apodizing phase plate coronagraph

Steven P. Bos, Kelsey L. Miller, Julien Lozi, Olivier Guyon, Vikram M. Radhakrishnan, Emiel H. Por, Christoph U. Keller, David Doelman, Sebastien Vievard, Ananya Sahoo, Vincent Deo, Thayne Currie, Nemanja Jovanovic, Frantz Martinache, Matthew A. Kenworthy, Frans Snik

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Proceedings Volume 11448, Adaptive Optics Systems VII; 1144818 (2020) https://doi.org/10.1117/12.2562294
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We present new results with the Asymmetric Pupil vector-Apodizing Phase Plate (APvAPP), which combines coronagraphy and wavefront sensing to enable a 100% science duty cycle. We show on-sky results at SCExAO with a non-linear, model-based wavefront sensing algorithm improving the raw contrast by a factor of 2 at 2-4 lambda/D. We also report on the first on-sky demonstration of spatial Linear Dark Field Control with the APvAPP. Together, these algorithms improve the control speed, raw contrast gain and allow more modes to be corrected. Finally, we discuss the path towards coherent differential imaging with the APvAPP.

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Steven P. Bos, Kelsey L. Miller, Julien Lozi, Olivier Guyon, Vikram M. Radhakrishnan, Emiel H. Por, Christoph U. Keller, David Doelman, Sebastien Vievard, Ananya Sahoo, Vincent Deo, Thayne Currie, Nemanja Jovanovic, Frantz Martinache, Matthew A. Kenworthy, and Frans Snik "On-sky results of focal-plane wavefront sensing and control with the asymmetric pupil vector-apodizing phase plate coronagraph", Proc. SPIE 11448, Adaptive Optics Systems VII, 1144818 (13 December 2020); https://doi.org/10.1117/12.2562294

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KEYWORDS

Wavefront sensors

Coronagraphy

Model-based design

Coherence imaging

Point spread functions

Wavefronts

Colorimetry

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