Towards controlled Fizeau observations with the Large Binocular Telescope

Eckhart Spalding, Phil Hinz, Steve Ertel, Erin Maier, Jordan Stone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations


The Large Binocular Telescope Interferometer (LBTI) can perform Fizeau interferometry in the focal plane, which accesses spatial information out to the LBT's full 22.7-m edge-to-edge baseline. This mode has previously been used to obtain science data, but has been limited to observations where the optical path difference (OPD) between the two beams is not controlled, resulting in unstable fringes on the science detectors. To maximize the science return, we are endeavoring to stabilize the OPD and tip-tilt variations and make the LBTI Fizeau mode optimized and routine. Here we outline the optical configuration of LBTI's Fizeau mode and our strategy for commissioning this observing mode.

Original languageEnglish (US)
Title of host publicationOptical and Infrared Interferometry and Imaging VI
EditorsPeter G. Tuthill, Michelle J. Creech-Eakman, Antoine Merand
ISBN (Print)9781510619555
StatePublished - 2018
Event2018 Optical and Infrared Interferometry and Imaging VI - Austin, United States
Duration: Jun 11 2018Jun 15 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Other2018 Optical and Infrared Interferometry and Imaging VI
Country/TerritoryUnited States


  • LBTI
  • Large Binocular Telescope
  • interferometry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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