Fully tunable active polarization imager for contrast enhancement and partial polarimetry

Anna, Guillaume; Sauer, Hervé; Goudail, François; Dolfi, Daniel

doi:10.1364/ao.51.005302

Cited by 41 publications

(16 citation statements)

References 34 publications

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“…We want to note that some authors [40,41] have proved that the intensity contrast of a particular sample can be enhanced by selecting a direct gating configuration where the PSG-PSD polarizations are optimized. To make this selection of the optimal PSG-PSD channels, we need to know some a priori polarimetric information of the sample or measure its Mueller matrix.…”

Section: 73)mentioning

confidence: 99%

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Polarization gating based on Mueller matrices

et al. 2017

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Abstract. We present mathematical formulae generalizing polarization gating techniques. Polarization gating refers to a collection of imaging methods based on the combination of different controlled polarization channels. In particular, we show how using the measured Mueller matrix of a sample, a widespread number of polarization gating configurations can be evaluated just from analytical expressions based on the Mueller matrix coefficients. We also show the interest of controlling the helicity of the states of polarization used for polarization gating based metrology, as this parameter has an impact in the image contrast of samples. In addition, we highlight as well the interest of combining polarization gating techniques with tools of data analysis related to the Mueller matrix formalism, such as the well-known Mueller matrix decompositions. The method discussed in this work is illustrated with the results of polarimetric measurements done on artificial phantoms and real ex-vivo tissues.

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Section: 73)mentioning

confidence: 99%

“…Note that the MM based approach we propose not only can be combined with PG configurations, but also could be used to perform the optimizations proposed in Refs. [40,41].…”

Section: 73)mentioning

confidence: 99%

Polarization gating based on Mueller matrices

et al. 2017

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“…We observe this scene with an active polarimetric imager constituted of a white light source and liquid crystals variable retarders as the one presented in [15]. Our goal is to optimize the …”

Section: Optimization On Real World Imagementioning

confidence: 99%

Optimal configurations for active polarimetric imaging systems in the presence of different sources of Poisson shot noise

Anna

Goudail

Dolfi

2013

Optics Communications

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“…To perform this optimization in an adaptive way, liquid-crystal variable retarders (LCVRs) can be used [9]. For the sake of polarization accuracy of the PSA, a narrowband spectral filter is often inserted in the system, since the polarization response of LCVR is highly wavelength-dependent.…”

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confidence: 99%

“…The PSA is composed of two LCVRs (Meadowlark Optics) and a linear polarizer in the configuration described in Ref. [9], whose eigenstates are given by Eq. (5).…”

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confidence: 99%

Contrast optimization in broadband passive polarimetric imaging

Boffety

Goudail

2014

Opt. Lett.

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Polarimetric imaging is often performed using light with a narrow spectrum for the sake of polarization measurement accuracy. However, due to the use of narrowband filters, this reduces the amount of light entering the system and thus the signal-to-noise ratio. This may not be the best choice for target detection applications, where a high target contrast is required rather than polarimetric accuracy. We address contrast optimization for broadband passive polarimetric imaging. We show through simulation and experiments that polarimetric contrast can be significantly increased by broadening the spectrum of analyzed light. In addition, we show that the contrast can be optimized by taking into account the spectral dependence of the scene and of the polarization analysis devices.

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Fully tunable active polarization imager for contrast enhancement and partial polarimetry

Cited by 41 publications

References 34 publications

Polarization gating based on Mueller matrices

Polarization gating based on Mueller matrices

Optimal configurations for active polarimetric imaging systems in the presence of different sources of Poisson shot noise

Contrast optimization in broadband passive polarimetric imaging

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