Interferometric characterization of rotation stages for X-ray nanotomography

Research output: Contribution to journalArticle

Abstract

The field of three-dimensional multi-modal X-ray nanoimaging relies not only on high-brilliance X-rays but also on high-precision mechanics and position metrology. Currently available state-of-the-art linear and rotary drives can provide 3D position accuracy within tens to hundreds of nm, which is often insufficient for high resolution imaging with nanofocused X-ray beams. Motion errors are especially troublesome in the case of rotation drives and their correction is more complicated and relies on the metrology grade reference objects. Here we present a method which allows the characterisation and correction of the radial and angular errors of the rotary drives without the need for a highly accurate metrology object. The method is based on multi-probe error separation using fiber-laser interferometry and uses a standard cylindrical sample holder as a reference. The obtained runout and shape measurements are then used to perform the position corrections using additional drives. We demonstrate the results of the characterization for a piezo-driven small rotation stage. The error separation allowed us to measure the axis runout to be approximately ±1.25 μm, and with active runout compensation this could be reduced down to ±42 nm.

Details

Authors
  • Tomas Stankevic
  • Christer Engblom
  • Florent Langlois
  • Filipe Alves
  • Alain Lestrade
  • Nicolas Jobert
  • Gilles Cauchon
  • Ulrich Vogt
  • Stefan Kubsky
Organisations
External organisations
  • KTH Royal Institute of Technology
  • Synchrotron SOLEIL
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number053703
JournalReview of Scientific Instruments
Volume88
Issue number5
StatePublished - 2017 May 1
Peer-reviewedYes