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Stokes Dynamic Polarimeter for Non-Organic and Organic Samples Characterization.

Dora-Luz Almanza-Ojeda1, Daniela Rodriguez-Sotelo1, Rogelio Castro-Sanchez1

  • 1Department of Electronics Engineering, Universidad de Guanajuato, Salamanca 36885, Mexico.

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|March 26, 2022
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Summary
This summary is machine-generated.

This study introduces an automatic Stokes dynamic polarimeter for material characterization. The system accurately measures light polarization properties to determine material quality using the Stokes-Mueller formalism.

Keywords:
Mueller matrixlight polarizationphotoelastic modulatorsurface fruitsynchronization

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Instrumentation

Background:

  • Light polarization properties are crucial for assessing linear-optical media.
  • The Stokes-Mueller formalism is standard for analyzing light polarization.
  • Existing Stokes polarimeters vary in resolution, speed, and light requirements.

Purpose of the Study:

  • To implement an automatic Stokes dynamic polarimeter for characterizing biological and non-biological materials.
  • To develop a system capable of calculating the Mueller matrix in reflection and transmission modes.

Main Methods:

  • Utilized two asynchronous photoelastic modulators and two nano-stepper motors.
  • Employed a 36-measure method for numerical Mueller matrix calculation via software, avoiding image processing.
  • Configured the system for He-Ne laser reflection or transmission measurements with 2% accuracy.

Main Results:

  • Successfully calculated the Mueller matrix for various samples in both reflection and transmission modes.
  • Validated system accuracy by calculating mean squared error against reference values for air and a mirror.
  • Demonstrated the efficiency of the proposed optical array for material characterization.

Conclusions:

  • The developed automatic Stokes dynamic polarimeter is an efficient tool for material analysis.
  • The system provides accurate Mueller matrix calculations without image processing.
  • The findings are validated through experimental results and comparison with existing literature.