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Bichromatic tetraphasic full-field optical coherence microscopy.

Rishyashring R Iyer1,2, Mantas Žurauskas1, Yug Rao1,2

  • 1University of Illinois Urbana-Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States.

Journal of Biomedical Optics
|April 8, 2024
PubMed
Summary
This summary is machine-generated.

Bichromatic tetraphasic (BiTe) full-field optical coherence microscopy (FF-OCM) offers dynamic intensity, phase, and spectroscopic contrast imaging without moving parts. This advanced FF-OCM technique maximizes information efficiency for biological sample characterization.

Keywords:
biological dynamicsoptical coherence microscopyphase imagingspectroscopic imaging

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Area of Science:

  • Biomedical Optics
  • Microscopy Techniques
  • Spectroscopy

Background:

  • Full-field optical coherence microscopy (FF-OCM) is widely used for backscattering and phase imaging.
  • Traditional FF-OCM methods suffer from limited functional information utilization and complex optical designs with moving parts for phase contrast.

Purpose of the Study:

  • To introduce a novel FF-OCM setup, bichromatic tetraphasic (BiTe) FF-OCM, for dynamic intensity, phase, and pseudo-spectroscopic contrast imaging.
  • To achieve single-shot, full-field, video-rate imaging without any moving parts.

Main Methods:

  • The BiTe FF-OCM setup utilizes anti-reflection (AR) coatings outside their rated bandwidths to generate four unique phase shifts.
  • These phase shifts are detected using two emission filters, enabling spectroscopic contrast generation.
  • The system captures dynamic intensity and phase profiles without artifacts or speckle noise.

Main Results:

  • BiTe FF-OCM successfully images scattering samples in three dimensions (3D).
  • The technique generates three complementary contrasts: intensity, phase, and color.
  • Demonstrated applications include observing cellular dynamics, imaging live micro-animals in 3D, capturing spectroscopic hemodynamics of tissues, and imaging microstructures with multi-color capabilities.

Conclusions:

  • BiTe FF-OCM enhances information efficiency in FF-OCM.
  • The design is simple, facilitating quantitative, dynamic, and spectroscopic characterization of biological samples.