Evolutionary timescales of AO-produced speckles at NIR wavelengths

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Author
Goebel, Sean B.
Guyon, Olivier
Hall, Donald N. B.
Jovanovic, Nemanja
Atkinson, Dani E.
Affiliation
Univ Arizona, Steward Observ
Univ Arizona, Coll Opt Sci
Issue Date
2016-07-26
Keywords
Extreme adaptive optics
SCExAO
SAPHIRA
speckles
high-contrast imaging

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Publisher
SPIE-INT SOC OPTICAL ENGINEERING
Citation
Sean B. Goebel ; Olivier Guyon ; Donald N. B. Hall ; Nemanja Jovanovic and Dani E. Atkinson " Evolutionary timescales of AO-produced speckles at NIR wavelengths ", Proc. SPIE 9909, Adaptive Optics Systems V, 990918 (July 26, 2016); doi:10.1117/12.2231926; http://dx.doi.org/10.1117/12.2231926
Journal
ADAPTIVE OPTICS SYSTEMS V
Rights
© 2016 SPIE
Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
Abstract
We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExA0 instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 A/D away from the diffraction-limited PSF in H-band (-1.6 m) images collected at 1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.
ISSN
0277-786X
DOI
10.1117/12.2231926
Version
Final published version
Additional Links
http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2231926
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