The Fiber Multi-Object Spectrograph (FMOS) project: The Anglo-Australian Observatory role

Peter Gillingham, Anna Moore, Masayuki Akiyama, Jurek Brzeski, David Correll, John Dawson, Tony Farrell, Gabriella Frost, Jason Griesbach, Roger Haynes, Damien Jones, Stan Miziarski, Rolf Muller, Scott Smedley, Greg Smith, Lew Waller, Katie Noakes, Chris Arridge

Research output: Contribution to journalConference articlepeer-review

21 Citations (Scopus)


The Fiber Multi-Object Spectrograph (FMOS) project is an Australia-Japan-UK collaboration to design and build a novel 400 fiber positioner feeding two near infrared spectrographs from the prime focus of the Subaru telescope. The project comprises several parts. Those under design and construction at the Anglo-Australian Observatory (AAO) are the piezoelectric actuator driven fiber positioner (Echidna), a wide field (30 arcmin) corrector and a focal plane imager (FPI) used for controlling the positioner and for field acquisition. This paper presents an overview of the AAO share of the FMOS project. It describes the technical infrastructure required to extend the single Echidna "spine" design to a fully functioning multi-fiber instrument, capable of complete field reconfiguration in less than ten minutes. The modular Echidna system is introduced, wherein the field of view is populated by 12 identical rectangular modules, each positioning 40 science fibers and 2 guide fiber bundles. This arrangement allows maintenance by exchanging modules and minimizes the difficulties of construction. The associated electronics hardware, in itself a significant challenge, includes a 23 layer PCB board, able to supply current to each piezoelectric element in the module. The FPI is a dual purpose imaging system translating in two coordinates and is located beneath the assembled modules. The FPI measures the spine positions as well as acquiring sky images for instrument calibration and for field acquisition. An overview of the software is included.

Original languageEnglish
Pages (from-to)985-996
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue number2
Publication statusPublished - 2002
Externally publishedYes
EventInstrument Design and Performance for Optical/Infrared Ground-based Telescopes - waikoloa, HI, United States
Duration: 2002 Aug 252002 Aug 28


  • Astronomical instrumentation
  • Fiber positioner
  • Fibers
  • Piezo
  • Spectroscopy
  • Subaru telescope

ASJC Scopus subject areas

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


Dive into the research topics of 'The Fiber Multi-Object Spectrograph (FMOS) project: The Anglo-Australian Observatory role'. Together they form a unique fingerprint.

Cite this