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    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
    
    Metadata
    Show full item record
    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
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2231926
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