Polarization signatures of spherical and conical targets measured by Mueller matrix imaging polarimetry

Gerligand, Pierre-Yves; Chipman, Russell A.; Sornsin, Elizabeth A.; Smith, Matthew H.

doi:10.1117/12.278987

Cited by 8 publications

(5 citation statements)

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“…Linear DOP evaluation can be used to compare and classify rough and smooth surfaces with a polarization signature. 3 The DOP image also permits one to distinguish between metallic and scattering materials 14 and between different painted surfaces. 20 The DOP has values between zero and one and provides a summary of the object's depolarizing ability in a single figure.…”

Section: Considerations About the Degree Of Polarizationmentioning

confidence: 99%

“…Observation of polarization properties of a scene can provide valuable information about the local nature of objects. Therefore, imaging polarization can be used with much benefit in applications such as medical imaging, 1,2 metrology, [3][4][5] and remote sensing. 6,7 Imaging polarization can be used to study the depolarization due to objects, and then to discriminate materials that would have had the same appearance if polarization had not been taken into account.…”

Section: Introductionmentioning

confidence: 99%

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High-speed degree-of-polarization imaging with a ferroelectric liquid-crystal modulator

Jaulin

2008

Opt. Eng

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Images describing polarimetric characteristics of objects are more and more used when studying complex scenes. In some cases, only the depolarization phenomenon, mostly due to scattering, proves of interest and estimating the degree of polarization ͑DOP͒ is sufficient. For a linearly polarized beam under normal incidence, when the materials in the scene exhibit neither birefringence nor dichroism, this comes down to an intensity measurement in two crossed directions. Nevertheless, the classical optical setup, consisting mainly of a rotating polarizer used as a polarization state analyzer, gives good-quality images, but cannot provide dynamic information. In this paper, we propose to use a ferroelectric liquid-crystal modulator in an imaging polarimeter. We demonstrate the use of this modulator as a polarization state analyzer for frame rates up to about 400 Hz. Provided a fast camera is used, we show that the polarimeter allows us to surpass the classical video frame rate. We propose a setup using a rapid CCD camera ͑up to 233 Hz͒. Images in DOP are of very high quality and hold their own against images obtained with a classical polarizer. With a faster camera, we were able to obtain images at up to 400 Hz.

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Section: Considerations About the Degree Of Polarizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-speed degree-of-polarization imaging with a ferroelectric liquid-crystal modulator

Jaulin

2008

Opt. Eng

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“…Polarization imaging can provide information which does not appear in classic intensity imaging. Applications of imaging polarimetry can be found in a growing number of fields: medical imaging [1,2], metrology [3]- [5], remote sensing [6,7] or for the discrimination between materials with the same appearance [8]. In some cases, 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.…”

Section: Introductionmentioning

confidence: 99%

High speed partial Stokes imaging using a ferroelectric liquid crystal modulator

Jaulin¹,

Bigué²

2008

J. Eur. Opt. Soc.-Rapid Publ.

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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.

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“…Polarimetric analysis of scenes is known as a valuable technique in a growing number of fields (see for instance [1][2][3][4] ). Nevertheless, capturing good-quality polarimetric images in order to determine Stokes or Mueller parameters, or simply the degree of polarization, remains difficult and slow, ad is often restricted to laboratory conditions.…”

Section: Introductionmentioning

confidence: 99%

High-speed portable polarimeter using a ferroelectric liquid crystal modulator

Bigué¹,

Cheney²

2007

Polarization Science and Remote Sensing III

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The implementation of an imaging polarimeter able to capture dynamic scenes is presented. Our prototype is designed to work at visible wavelengths and to operate at high-speed, ie above 200 Hz, contrary to commercial or laboratory liquid crystal polarimeters previously reported in the literature. It has been used in the laboratory with controlled illumination conditions (wavelength, coherence or incoherence, incidence, …) as well as in a natural environment with sunlight or any lamp or light source. The device consists of commercial components whose cost is moderate. The polarizing element is based on a ferroelectric liquid crystal modulator which acts as a half-wave plate at its design wavelength. The device has been fully characterized and verified to work up to 1 kHz. It produces a 90° polarization rotation. In this Orthogonal State Configuration Imagery (OSCI), images in degree of polarization (DOP) can be obtained with simple postprocessing of two consecutive images. With a commercial CCD camera, operation up to 360 Hz is demonstrated, resulting in images whose quality is equivalent to that of classical low speed polarimeters.

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Polarization signatures of spherical and conical targets measured by Mueller matrix imaging polarimetry

Cited by 8 publications

References 0 publications

High-speed degree-of-polarization imaging with a ferroelectric liquid-crystal modulator

High-speed degree-of-polarization imaging with a ferroelectric liquid-crystal modulator

High speed partial Stokes imaging using a ferroelectric liquid crystal modulator

High-speed portable polarimeter using a ferroelectric liquid crystal modulator

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