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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Imaging linear polarimetry using a single ferroelectric liquid crystal modulator.

Luc Gendre¹, Alban Foulonneau, Laurent Bigué

¹Laboratoire Modélisation Intelligence Processus Systèmes (EA 2332), Ecole Nationale Supérieure d’IngénieursSud Alsace, Université de Haute-Alsace, 12 rue des Frères Lumière, 68093 Mulhouse Cedex, France. luc.gendre@uha.fr

|September 8, 2010

Summary

Ferroelectric liquid crystal cells function as tunable half-wave plates in polarimetry. This enables lightweight imaging polarimetric setups for accurate polarization analysis.

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Area of Science:

Optics and Photonics
Polarimetry
Liquid Crystal Devices

Background:

Ferroelectric liquid crystal (FLC) cells are typically used as bistable polarization rotators for analyzing crossed polarizations.
Traditional polarimetric setups can be complex and heavy, limiting their application in certain imaging scenarios.

Purpose of the Study:

To demonstrate the utility of ferroelectric liquid crystal cells as tunable half-wave plates in polarimetry.
To design and implement a lightweight imaging polarimetric system for linear polarization analysis.

Main Methods:

Utilizing a single ferroelectric liquid crystal cell as a tunable half-wave plate at its nominal wavelength.
Employing a single digital video camera integrated with the FLC modulator for polarization analysis.
Developing a partial Stokes polarimeter for real-time data acquisition.

Main Results:

The FLC cell's behavior closely mimics a tunable half-wave plate when driven correctly.
A partial Stokes polarimeter was successfully designed and implemented.
Accurate measurements of polarization azimuthal angle and degree of linear polarization were achieved at 150 frames per second.

Conclusions:

Ferroelectric liquid crystal cells offer significant advantages for lightweight imaging polarimetric setups.
The developed system provides fast and accurate linear polarization analysis, suitable for various applications.
This approach enhances the practicality and efficiency of polarimetric imaging.