Dynamic polarization holography: methods and applications

Kilosanidze, Barbara; Kakauridze, George; Chaganava, Irakli

doi:10.1117/12.821766

Cited by 3 publications

(5 citation statements)

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“…Based on such element we have developed the Polarization-Holographic Imaging Stokes Spectro-Polarimeter (PHISSP) for astronomy to determine an instant polarization state of a point source object and the distribution of a polarization on an extended objects image for different spectral ranges. [21][22][23] A schematic picture of diffraction on the polarizationholographic element, a photo of the PHISSP and its principal schema are shown on The input part of the polarimeter is equipped with two controllable apertures of variable size, the width of which varies from 0 to 3 mm. Thus, through them, it is possible to obtain a combined aperture in the form of a rectangular aperture (height up to 3 mm and a width of up to 0.01 mm), as well as in a square form up to 3 x 3 mm in size.…”

Section: Polarization-holographic Stokes Imaging Astropolarimetermentioning

confidence: 99%

Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Kilosanidze,

Kakauridze,

Chaganava

et al. 2023

Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV

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An innovative polarization-holographic imaging Stokes spectropolarimeter is presented. The main analyzing unit of such a polarimeter is the integral polarization-holographic diffraction element, which enables the complete analysis of the polarization state of incoming light to be carried out in real-time. It decomposes the incoming light into diffraction orders, the intensities of which vary depending on the polarization state of the light source. After the simultaneous diffraction order intensity measurements of the corresponding points or areas in the diffraction orders, we get the realtime Stokes images of the light source, which allows determining the entire polarization state of a point or extended space object for different spectral regions and variable polarization. A working aperture can be from 0.5 cm up to 5 cm in diameter. The results of studies on improving the stability and diffraction efficiency of the element are presented. Measurements of the polarization state by the standard star were carried out to calibrate the spectropolarimeter. Polarimetric measurements of some astronomical objects have been carried out. The resulting errors are better than 10 -2 . The polarization-holographic imaging Stokes spectropolarimeter has no mechanically moving or electrically tunable optical elements, has no internal reflections, and is universal, compact, cost-effective, and lightweight.

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Section: Polarization-holographic Stokes Imaging Astropolarimetermentioning

confidence: 99%

Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Kilosanidze,

Kakauridze,

Chaganava

et al. 2023

Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV

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“…Though, the optimal polymer structure was found. It is based on isophthalic acid Ph-IzoPh-MCh (9). Doping bisazodye o-TBAP in this polymer matrix forms a transparent amorphous material in which optical anisotropy is induced by light with a wavelength of 457 nm (maximum absorption for the medium) the induced anisotropy in this media keep stored at temperature up to 80-85°C.…”

Section: Development Of the Polarization-sensitive Materialsmentioning

confidence: 99%

“…It appears obvious that mobile and active hydrogen atoms belongs to hydroxyl groups in dye o-TBAP (4) plays a major role due to external hydrogen bonds with adjacent molecules of the polymer matrix. In order to obtain high-performance and moisture-proof material which also enable store the induced photoanisotropic effects resistant to extreme ambient temperatures, we synthesized a polymer with high glass transition temperature (9) Ph-IzoPh-MCh, and (10) Ph-TerePh-MCh by interfacial polycondensation between phenolphthalein as bisphenol A and dichloranhydride phthalic acid. Ph-IzoPh-MCh (9) Ph-TerePh-MCh (10) The highest thermal stability of polymers is typical for linear and rigid structures of macromolecules in particular synthesized Ph-TerePh-MCh (10).…”

Section: Development Of the Polarization-sensitive Materialsmentioning

confidence: 99%

“…These are media on the basis of azodyes introduced in different polymer matrices, silver halide emulsions, azobenzene side-chain polymers and so on. [3][4][5][6][7][8][9] Such media are widely used as recording media in polarization holography for the creation of polarization-holographic optical elements, in Veigert-photography, in the tasks of optical information processing. For the media application in polarization holography the following characteristics are required: high sensitivity to the actinic polarized light, high values of induced anisotropy, high-resolution, high stability for stable materials and the possible quick relaxation time for dynamic materials, as well as reversibility and material post-processing absence.…”

Section: Introductionmentioning

confidence: 99%

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Development of high-performance, stable, and moisture-resistant polarization-sensitive materials

Chaganava¹,

Kakauridze²,

Kilosanidze³

et al. 2011

SPIE Proceedings

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New stable polarization-sensitive materials are developed on the hydrophobic components basis which doesn't require an additional moisture protection. Bisazodye ortho-tolidinebisazophenol chromophoric component was synthesized which is liposoluble analogue of water-soluble azodye Mordant Pure Yellow M. This bisazodye were used to develop the hydrophobic materials films which can be applied as a protective layer themselves. To increase the thermal stability we have synthesized material by introducing bisazodye into the main-chain of macromolecule of thermally stable polymer. The different types of polarization-holographic gratings with high diffraction efficiency of 30-50% were recorded on the obtained materials by laser beams (441 -488 nm).

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“…Up to now different polarization-sensitive materials have been synthesized and investigated well enough both stable in which anisotropy rises under the action of actinic polarized light when energetic exposure increases and it retains a long time after the illumination stops and also dynamic polarization-sensitive media with dark relaxation. These are media on the basis of azodyes introduced in different polymer matrices, silver halide emulsions, azobenzene sidechain polymers and so on [3][4][5][6][7][8][9] . Such media are widely used as recording media in polarization holography for the creation of polarization-holographic optical elements, in Veigert-photography, in the tasks of optical information processing.…”

Section: Introductionmentioning

confidence: 99%

Photoanisotropy in polarization-sensitive medium developed on the basis of polar water-soluble components

Chaganava

Kakauridze²,

Kilosanidze³

2011

SPIE Proceedings

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In order to obtain a polarization sensitive materials with improved characteristics, there was conducted intensify interaction between the components of recording media through the interaction between the molecular electrostatic forces. For creating materials there were used various organic dyes capable of photochemical geometric isomerization under the influence of actinic polarized light with a wavelength closed to the maximum of the absorption spectrum of each dye. Various polarization sensitive materials have been synthesized based on the polar water-soluble components. Substantial improvement photoanisotropic characteristics of these materials are revealed due to previously added ionizing functional groups in the chromophoric components. It is shown particular exemplary embodiment of synthesis the materials composed of dyes which communicate with certain polymers via dipole-ionic bonds. The research data of medium properties on their base have been brought up for the consideration. In the same way photoanisotropic materials are created on basis of various polar polymer matrixes which separate macromolecules are capable of establishing dipole-dipole bonds with each other. Thanks to this circumstance a supplementary number of polymer fragments which cannot afford direct connection with dye molecules are also able to get drawing into the photoanisotropy inducting processes. It is displayed the influence of such interactions on material kinetics and value of attainable photoanisotropy. A capability of achievement extremely high values of photoanisotropy is produced on the material samples based on the dyes with expanded number of ionized substituent.

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Dynamic polarization holography: methods and applications

Cited by 3 publications

References 0 publications

Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Development of high-performance, stable, and moisture-resistant polarization-sensitive materials

Photoanisotropy in polarization-sensitive medium developed on the basis of polar water-soluble components

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