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Demonstration of state-locked control of tiled system

  • Yuchuan Yang*
  • , Xiao Wang
  • , Junwei Zhang
  • , Hui Luo
  • , Fuquan Li
  • , Xiaojun Huang
  • , Feng Jing
  • *Corresponding author for this work
  • National University of Defense Technology

Research output: Contribution to journalArticlepeer-review

Abstract

The stability of phased-array optics is a crucial issue for farfield focal-spot quality. The tiled approach of phasing optical elements is a widely used technique. Here it is adopted to maintain the long-time stability of a tiled system by a proportional-integral-differential (PID) algorithm. Experimental data is taken with 2×1 tiled-flat square mirrors driven by 3-axis piezoelectric actuators. The feedback frequency is over 80 Hz and the displacement error is below 4 nm. The optical measurement results show that the state-locked operation is continuously maintained for hourlong periods in PID control mode.

Original languageEnglish
Article number093601
JournalOptical Engineering
Volume50
Issue number9
DOIs
StatePublished - Sep 2011
Externally publishedYes

Keywords

  • Proportional-integral-differential algorithm
  • Statelocked control
  • Tiled apertures

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