Wide field amplitude and phase confocal microscope with parallel phase stepping

N. B E Sawyer, S. P. Morgan, Michael Geoffrey Somekh, C. W. See, X. F. Cao, B. Y. Shekunov, E. Astrakharchik

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

We describe a wide field phase sensitive confocal microscope based on correlation between speckles. In this system, parallel optical phase stepping provides for the simultaneous capture of four interferograms using a single camera, giving the system the potential to operate at high speed. The interferograms are mapped to a common frame of reference, removing any relative distortion in the process, so that phase, amplitude, and interference efficiency images can be obtained. We use a new phase stepping algorithm that accounts for the unequal phase steps and unbalanced beam amplitudes that are a consequence of the optical arrangement. Experimental results to show that the system operates as a wide field amplitude and phase confocal system are presented.
Original languageEnglish
Pages (from-to)3793-3801
Number of pages9
JournalReview of Scientific Instruments
Volume72
Issue number10
DOIs
Publication statusPublished - 1 Oct 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation

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