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Dual beam optical coherence tomography with simultaneous orthogonal scanning

  • US 10,641,601 B2
  • Filed: 07/09/2018
  • Issued: 05/05/2020
  • Est. Priority Date: 09/08/2017
  • Status: Active Grant
First Claim
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1. A simultaneous orthogonal scanning dual beam optical coherence tomography (OCT) system, comprising:

  • a light source generating broadband light;

    a light distribution assembly distributing the light from the light source;

    a sample arm splitting a fraction of the light from the light distribution assembly into a horizontally polarized beam and a vertically polarized beam traveling along different optical paths, simultaneously emitting the horizontally polarized beam and the vertically polarized beam to a subject after converting the horizontally polarized beam and the vertically polarized beam by a sample arm polarization beam splitter such that scanning directions thereof by a galvanometer scanner are perpendicular to one another, and receiving a reflected horizontally polarized beam and a reflected vertically polarized beam from the subject;

    a reference arm splitting the other fraction of the light from the light distribution assembly and generating a reference beam containing a horizontal polarization component and a vertical polarization component by a reference arm polarization beam splitter;

    an interference assembly receiving the reflected horizontally polarized beam, the reflected vertically polarized beam, and the reference beam and generating an interference signal of horizontal polarization components and an interference signal of vertical polarization components allowing simultaneous acquisition of an XZ plane image and a YZ plane image perpendicular to one another; and

    a detection assembly converting the interference signals into electrical signals.

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