Novel metrology for tilting spine multi-fiber positioners

Peter Gillingham*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

A few telescope projects plan to feed spectrographs through thousands of fibres, needing metrology accuracy for feedback of just a few μm. This generally requires accuracy at the metrology camera better than 0.1 arcsec, which can be frustrated by local seeing. With fiducials situated with the array of science fibres, seeing displacements can be calibrated, with accuracy depending on the fiducial spacing. Fiducials within the field usually require sacrificing science fibres but AAO's positioner for MSE will take advantage of its tilting spines and a special but simple metrology camera to provide a multitude of fiducials within the field with no such sacrifice.

Original languageEnglish
Title of host publicationAdvances in Optical Astronomical Instrumentation 2019
EditorsSimon Ellis, Céline d'Orgeville
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-2
Number of pages2
ISBN (Electronic)9781510631472
ISBN (Print)9781510631465
DOIs
Publication statusPublished - 3 Jan 2020
EventAdvances in Optical Astronomical Instrumentation 2019 - Melbourne, Australia
Duration: 9 Dec 201912 Dec 2019

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume11203
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdvances in Optical Astronomical Instrumentation 2019
CountryAustralia
CityMelbourne
Period9/12/1912/12/19

Keywords

  • Local seeing
  • Multi-fiber positioner
  • Optical metrology

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