• DocumentCode
    520691
  • Title

    Speckle noise suppression by unbalanced nulling interferometer and adaptive optics

  • Author

    Yokochi, K. ; Nishikawa, J. ; Murakami, N. ; Abe, L. ; Tamura, M. ; Kurokawa, T.

  • Author_Institution
    Tokyo Univ. of Agric. & Technol., Koganei, Japan
  • fYear
    2010
  • fDate
    16-21 May 2010
  • Firstpage
    1
  • Lastpage
    2
  • Abstract
    We carried out a laboratory experiment of a pre-optical system for a stellar coronagraph to suppress stellar speckle noise for direct detection of exo-planets. It consists of an unbalanced nulling interferometer (UNI) and phase and amplitude correction (PAC) system. We observed that a speckle level in the focal plane was successfully suppressed (from 1.8×10−4 to 2.9×10−5) by the virtual wavefront correction of lambda/(100×7.0) rms in the UNI-PAC system.
  • Keywords
    Adaptive optics; Delta modulation; Dynamic range; Mirrors; Optical interferometry; Optical noise; Optical sensors; Planets; Sagnac interferometers; Speckle;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
  • Conference_Location
    San Jose, CA, USA
  • Print_ISBN
    978-1-55752-890-2
  • Electronic_ISBN
    978-1-55752-890-2
  • Type

    conf

  • Filename
    5500283
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=520691