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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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Multimodal fluorescence microscope with fast adaptive polarimetry.

Berta Martínez-Prat1, Oriol Arteaga1, Francesc Sagués1

  • 1Universitat de Barcelona and Institute of Nanoscience and Nanotechnology (IN2UB), Martíi Franquès 1, 08028, Barcelona, Spain.

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|October 11, 2023
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Summary

This study introduces a cost-effective quantitative polarimetry microscope for observing optical anisotropy. The new instrument enables real-time analysis of birefringent materials, advancing microscopy for diverse scientific fields.

Keywords:
AnisotropyBirefringenceFluorescence microscopyOptical microscopy

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Biomedical Imaging

Background:

  • Polarized light microscopy is crucial for studying optically anisotropic materials but often yields qualitative data.
  • Quantitative polarimetry is typically expensive and slow, limiting real-time analysis of dynamic processes.
  • Existing methods struggle to quantify the spatial distribution of optical anisotropy.

Purpose of the Study:

  • To develop a custom, cost-effective optical microscope for quantitative polarimetry.
  • To enable real-time measurement of local optical axis and birefringence.
  • To create a multimodal instrument by integrating polarimetry with fluorescence microscopy.

Main Methods:

  • Construction of a custom quantitative polarimetry microscope using off-the-shelf components.
  • Development of a system capable of extracting local optical axis and birefringence.
  • Integration of polarimetry with simultaneous fluorescence microscopy.

Main Results:

  • The custom microscope achieves quantitative polarimetry at the cost of a standard scientific polarizing microscope.
  • The instrument can measure local optical axis and birefringence at frequencies of several Hz.
  • The multimodal system combines polarimetry with fluorescence imaging for enhanced analysis.

Conclusions:

  • The developed instrument offers a low-cost, high-speed solution for quantitative polarimetry.
  • This technique significantly improves the ability to study optical anisotropy in various materials.
  • The multimodal capabilities open new avenues for research in materials science and biomedical applications.