Abstract
This paper describes the implementation of an imaging polarimeter using a single ferroelectric liquid crystal light modulator. It provides partial imaging Stokes information at 234 Hz, much faster than polarimeters using nematic light modulators. This information is obtained for dynamic scenes in reflection or transmission. Partial Stokes information contains the first three Stokes parameters. With this information, imaging of the linear degree of polarization and of the angle of polarization can be obtained and imaging linear depolarization can be quantified.
Highlights
Polarization imaging can provide information which does not appear in classic intensity imaging
We propose to use an accordable high speed ferroelectric light modulator as a polarization rotator in an imaging polarimeter
The first three Stokes components and DOPL and polarization angle can be evaluated at 234 Hz
Summary
Polarization imaging can provide information which does not appear in classic intensity imaging. Partial polarimetric information may be sufficient: circularly polarized light is not useful and only linearly polarized light is considered, which comes down to evaluating the first three Stokes parameters. Getting all possible information about linear polarization, ie degree of polarization and direction, comes down to evaluating the first three Stokes parameters. Such implementations have already been proposed, using either two bistable modulators [15, 16] or a single accordable modulator. Accordable modulators are usually nematic liquid crystal light modulators, but the latter usually run at low frame rates, typically 20-50 Hz. In this paper, we propose to use an accordable high speed ferroelectric light modulator as a polarization rotator in an imaging polarimeter
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