A prototype cryogenic pick-off arm for multi-IFU spectrometers

S. Ramsay Howat*, D. J. Robertson, A. Haslehurst, J. Schmoll, P. Parr Burman, R. Sharples, C. Dickson, P. Hastings, D. Lee, P. Luke, P. McMahon, N. Phillips, M. Wells, C. Cunningham, N. Dipper, R. Aspey

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


A prototype cryogenic 'pick-off arm for selecting a small field from the focal plane of a large telescope has been built and tested against a set of scientific requirements representative of those for proposed multi-integral-field spectrographs. In this paper, we present the design of the arm and the results of the cryogenic testing. Since the proposed instruments will require tens of arms, perhaps hundreds, we have also considered the industrialisation of the manufacture and assembly of the arms. We briefly discuss this aspect of the design and the possibilities for future instrumentation on Extremely Large Telescopes.

Original languageEnglish (US)
Pages (from-to)1371-1382
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART 3
StatePublished - 2004
Externally publishedYes
EventGround-based Instrumentation for Astronomy - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004


  • Instrumentation: cryogenic
  • Instrumentation: near-infrared
  • Materials: carbon fibre reinforced plastic
  • Materials: graphite epoxy
  • Multi-integral field units
  • Pick-off system

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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