Polarization-holographic gratings for analysis of light 1 Analysis of completely polarized light

Kilosanidze, Barbara; Kakauridze, George

doi:10.1364/ao.46.001040

Cited by 35 publications

(11 citation statements)

References 11 publications

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“…describe the local polarization ellipse, we used the same formalism as Kilosanidze and Kakauridze [18]. To create a rotational pattern, we chose a four-beams configuration.…”

Section: Polarization Holography With Four Beamsmentioning

confidence: 99%

Polarization holography for vortex retarders recording: laboratory demonstration

et al. 2015

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This paper will present a prototype of the first set of vortex retarders made of liquid crystal polymers recorded by polarization holography. Vortex retarders are birefringent plates characterized by a rotation of their fast axis. Liquid crystals possess birefringent properties and they are locally orientable. Their orientation is defined by the perpendicular to the local orientation of the recording field. Polarization holography is a purely optical recording method. It is based on the superimposition of coherent and differently polarized beams. It is used to shape the electric field pattern to enable the recording of vortex retarders. The paper details the mathematical model of the superimposition process. The recording setup is exposed; it is characterized by a nearly common path interferometer. Two sets of measurements allowing the prediction of the retarder's features are presented and compared. Finally, the experimentally recorded retarder is shown, its characteristics are investigated and compared to the predicted ones.

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“…describe the local polarization ellipse, we used the same formalism as Kilosanidze and Kakauridze [18]. To create a rotational pattern, we chose a four-beams configuration.…”

Section: Polarization Holography With Four Beamsmentioning

confidence: 99%

Polarization holography for vortex retarders recording: laboratory demonstration

et al. 2015

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“…Such an element was created by means of polarization-holographic method 15 , when several polarization-holographic gratings with different profile of the anisotropy and gyrotropy in the band (gratings C , 90 L , 45 L ) are recorded on one and the same area of polarization-sensitive material, so that the diffracted beams have been spatially separated. [10][11][12] We use polarization-sensitive materials for recording polarization-holographic gratings and elements on their basis. In such materials under the action of polarized light a photoanisotropy and photogyrotropy of optical parameters are induced.…”

Section: Theoretical Modelmentioning

confidence: 99%

A new real-time polarimetric method for determining the distribution of stressed state in different constructions

Kakauridze

Kilosanidze

Kvernadze

et al. 2015

Photonic Instrumentation Engineering II

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A new real-time nondestructive polarimetric method is suggested for the determination of the stressed state distribution in different objects. Light reflected from the object is polarized in a varying degree, and the distribution of the polarization state in the object image is related to the distribution of stresses in it. Method is based on the obtaining the distribution pattern of the polarization state of light in the object image, which is formed by an objective. The integral polarization-holographic diffraction element developed by us is used for real time complete analysis of the polarization state of light at each point of the image, formed by the element in the diffraction orders. The simultaneous measurement of the intensities in four diffracted beams by means of a matrix of photodetectors and the appropriate software enable the polarization state of an analyzable light and its change to be obtained in real time. The laboratory model is presented. The correlation relations between the polarization state of light reflected from the sample with the distribution of the dosated mechanical stresses is considered. The theoretical model is presented. The experimental results are shown for different samples with one-and two-axis stress distribution. The method is nondestructive, i.e. there is no need to drill holes or openings or sticking transparent photoelastic plates on the object to determine the stresses. This method will enable the distance monitoring and diagnosis of already existing constructions to be carried out. This method will differ by universality, simplicity, high speed and comparative cheapness.

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“…[12][13][14][15] In the process of diffraction, the element decomposes light incoming on them onto orthogonal circular and linear basis. As a result the element forms 3 beams in +1-st and 3 beams in -1-st orders of diffraction: two orthogonal circularly polarized beams with intensities C I + , C I − , two linearly polarized beam 45 I with an azimuth +45 0 with equal intensities and two linearly polarized beams 90 I with an azimuth +90 0 with equal intensities, and also nondiffracted beam with a state of polarization identical to incoming beam by a state of polarization.…”

Section: Theoretical Modelmentioning

confidence: 99%

Determination of the characteristics of the surface of objects at optical remote sensing by the polarization-holographic imaging Stokes spectropolarimeter

Kilosanidze

Kakauridze

2011

SPIE Proceedings

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The Polarization-Holographic Imaging Stokes Spectro-Polarimeter developed by us is proposed to use for the determination of the characteristics of the surface of objects at optical remote sensing. Only one integral polarizationholographic element is used in such a spectropolarimeter as an analyzing detail, which makes real time complete analysis of the polarization state of light (determination of all the four Stokes parameters) possible, as well as the determination of the distribution of the polarization state of light in the image of recognizable object and the dispersion of this distribution, which provides additional information while identifying an object. A theoretical model showing the connection of the Stokes parameters of light reflected from a recognizable object with the characteristics of the material of the reflecting surface of the object has been developed that allows the appropriate correlation connections to be set. Experimentally the possibility of obtaining the distribution of the values of the Stokes parameters is shown for the samples from different materials and of a different geometric form.

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Polarization-holographic gratings for analysis of light 1 Analysis of completely polarized light

Cited by 35 publications

References 11 publications

Polarization holography for vortex retarders recording: laboratory demonstration

Polarization holography for vortex retarders recording: laboratory demonstration

A new real-time polarimetric method for determining the distribution of stressed state in different constructions

Determination of the characteristics of the surface of objects at optical remote sensing by the polarization-holographic imaging Stokes spectropolarimeter

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