• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    A two-band approach to nλ phase error corrections with LBTI's PHASECam

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    107011M.pdf
    Size:
    1.399Mb
    Format:
    PDF
    Description:
    Final Published version
    Download
    Author
    Maier, Erin
    Hinz, Philip
    Ertel, Steve
    Defrère, Denis
    Downey, Elwood
    Affiliation
    Univ Arizona, Steward Observ,
    Issue Date
    2018
    Keywords
    LBT
    Infrared interferometry
    Fringe tracking
    Fizeau imaging
    Nulling interferometry
    
    Metadata
    Show full item record
    Publisher
    SPIE-INT SOC OPTICAL ENGINEERING
    Citation
    E. R. Maier, P. M. Hinz, D. Defrère, S. Ertel, and E. Downey "A two-band approach to nλ phase error corrections with LBTI's PHASECam", Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107011M (9 July 2018); doi: 10.1117/12.2313627; https://doi.org/10.1117/12.2313627
    Journal
    OPTICAL AND INFRARED INTERFEROMETRY AND IMAGING VI
    Rights
    © 2018 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
    PHASECam is the Large Binocular Telescope Interferometer's (LBTI) phase sensor, a near-infrared camera which is used to measure tip/tilt and phase variations between the two AO-corrected apertures of the Large Binocular Telescope (LBT). Tip/tilt and phase sensing are currently performed in the H (1.65 mu m) and K (2.2 pm) bands at 1 kHz, and the K band phase telemetry is used to send tip/tilt and Optical Path Difference (OPD) corrections to the system. However, phase variations outside the range [-pi, pi] are not sensed, and thus are not fully corrected during closed-loop operation. PHASECam's phase unwrapping algorithm, which attempts to mitigate this issue, still occasionally fails in the case of fast, large phase variations. This can cause a fringe jump, in which case the unwrapped phase will be incorrect by a wavelength or more. This can currently be manually corrected by the observer, but this is inefficient. A more reliable and automated solution is desired, especially as the LBTI begins to commission further modes which require robust, active phase control, including controlled multi-axial (Fizeau) interferometry and dual-aperture non-redundant aperture masking interferometry. We present a multi-wavelength method of fringe jump capture and correction which involves direct comparison between the K band and currently unused H band phase telemetry.
    ISSN
    9781510619555
    9781510619562
    DOI
    10.1117/12.2313627
    Version
    Final published version
    Sponsors
    NASA [NSF 0705296]
    Additional Links
    https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10701/2313627/A-two-band-approach-to-n%ce%bb-phase-error-corrections-with/10.1117/12.2313627.full
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2313627
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.