A Caltech Library Service

New NIR spectro-polarimetric modes for the SCExAO instrument

Lozi, Julien and Guyon, Olivier and Kudo, Tomoyuki and Zhang, Jin and Jovanovic, Nemanja and Norris, Barnaby and Martinod, Marc-Antoine and Groff, Tyler D. and Chilcote, Jeffrey and Tamura, Motohide and Bos, Steven and Snik, Frans and Vievard, Sébastien and Sahoo, Ananya and Deo, Vincent and Martinache, Frantz and Kasdin, Jeremy (2020) New NIR spectro-polarimetric modes for the SCExAO instrument. In: Adaptive Optics Systems VII. Proceedings of SPIE. No.11448. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114487C. ISBN 9781510636835.

[img] PDF (Conference Poster) - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Polarization Differential Imaging (PDI) is one of the most productive modes of current high-contrast imagers. Dozens of new protoplanetary, transition and debris disks were imaged recently for the first time, helping us understand the processes of planet formation, and giving clues on the mass of potential planets inside these disks, even if they cannot be imaged directly. The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is equipped with a fast visible dual-camera polarimetric module, VAMPIRES, already producing valuable scientific observations of protoplanetary disks and dust shells. In addition, we recently commissioned two new polarimetric modules in the infrared. The first one is a spectro-polarimetric mode using the CHARIS Integral Field Spectrograph (IFS). A Wollaston prism was added in front of the IFS, reducing the field-of-view to 2x1 arcsec to accommodate for the imaging of both polarizations on the same detector without sacrificing the spectral resolution of the instrument, in any of its spectral modes. The second module, similar to VAMPIRES, uses a low-noise high frame rate C-RED ONE camera combined with a Ferroelectric Liquid Crystal (FLC) device to modulate and record the polarization at high-speed, freezing effectively the atmospheric speckles for higher precision. We present on-sky results of the new polarimetric capabilities taken during the commissioning phase. In addition, we show future capabilities that are already scheduled to increase the performance of these modules, especially the addition of non-redundant masks, as well as a polarimetric vector Apodizing Phase Plate (vAPP) coronagraph.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Poster
Lozi, Julien0000-0002-3047-1845
Guyon, Olivier0000-0002-1097-9908
Kudo, Tomoyuki0000-0002-9294-1793
Jovanovic, Nemanja0000-0001-5213-6207
Norris, Barnaby0000-0002-8352-7515
Groff, Tyler D.0000-0001-5978-3247
Chilcote, Jeffrey0000-0001-6305-7272
Tamura, Motohide0000-0002-6510-0681
Snik, Frans0000-0003-1946-7009
Vievard, Sébastien0000-0003-4018-2569
Sahoo, Ananya0000-0003-2806-1254
Martinache, Frantz0000-0003-1180-4138
Kasdin, Jeremy0000-0002-6963-7486
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11448
Record Number:CaltechAUTHORS:20210120-103432640
Persistent URL:
Official Citation:Julien Lozi, Olivier Guyon, Tomoyuki Kudo, Jin Zhang, Nemanja Jovanovic, Barnaby Norris, Marc-Antoine Martinod, Tyler D. Groff, Jeffrey Chilcote, Motohide Tamura, Steven Bos, Frans Snik, Sébastien Vievard, Ananya Sahoo, Vincent Deo, Frantz Martinache, and Jeremy Kasdin "New NIR spectro-polarimetric modes for the SCExAO instrument", Proc. SPIE 11448, Adaptive Optics Systems VII, 114487C (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107590
Deposited By: Tony Diaz
Deposited On:20 Jan 2021 18:44
Last Modified:16 Nov 2021 19:04

Repository Staff Only: item control page