Full Stokes polarimetric imaging using a single ferroelectric liquid crystal device

Imaging linear polarimetry using a single ferroelectric liquid crystal modulator.

In the field of polarimetry, ferroelectric liquid crystal cells are mostly used as bistable polarization rotators suitable to analyze crossed polarizations. This paper shows that, provided such a cell is used at its nominal wavelength and correctly driven, its behavior is close to that of a tunable half-wave plate, and it can be used with much benefit in lightweight imaging polarimetric setups....

Dynamic polarimetric imaging: Overview and implementation using liquid crystal cells

This paper gives an overview of dynamic polarimetric imaging techniques. Various methods are reviewed. Techniques using liquid crystal devices, incepted in the late 1990’s, are emphasized. Practical implementations are presented. We particularly focus on high-speed techniques (ie faster than 200 Hz).

Columnar liquid crystal as a unique ferroelectric liquid crystal

Dielectric relaxation in a ferroelectric liquid crystal

2014 We present an analytic calculation of the normal modes of distortion induced by a small transverse A.C. electric field on a ferroelectric liquid crystal close to its transition temperature Tc between the smectic A and C* phases. These normal modes are superpositions of electric polarization and angular molecular distortion. Compared to a previous work of Blinc and Zeks, we assume that the ...

Rapid time-gated polarimetric Stokes imaging using photoelastic modulators.

We report a rapid time-gated full Stokes imaging approach without mechanically moving parts, which is well-suited for biomedical applications, using two photoelastic modulators (PEMs). A charge-coupled device (CCD) with microsecond time-gating capability was used to acquire the images. To synchronize the CCD with the PEMs, thus gaining signal-to-noise ratio advantage, a field programmable gate ...