Simultaneous multi-segmented mirror orientation test system using a digital aperture based on sheared Fourier analysis

Heejoo Choi, Isaac Trumper, Matthew Dubin, Wenchuan Zhao, Dae Wook Kim

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

This paper presents a simultaneous multi-segmented mirror orientation test system (SMOTS) using localized sheared images. A CMOS camera captures images of reflected 2D sinusoidal patterns from the test mirrors as their orientation changes. Surface orientation is measured to within 0.8 µrad (0.16 arcseconds) for a flat mirror. In addition, we measure the variation of seven mirror segments simultaneously. Furthermore, SMOTS is applied to measure the orientation of two concave mirrors with an accuracy of 2.7 µrad (0.56 arcseconds). The measurement time for seven segments is 0.07 s. This technique can monitor the mirror segment orientation in an open/closed-loop for various optical setups.

Original languageEnglish (US)
Pages (from-to)18152-18164
Number of pages13
JournalOptics Express
Volume25
Issue number15
DOIs
StatePublished - Jul 24 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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