Innovative polarization-holographic imaging Stokes spectropolarimeter for astronomy

Kilosanidze, Barbara; Kakauridze, George; Kvernadze, Teimuraz; Kurkhuli, Georgi

doi:10.1117/12.2253749

Cited by 2 publications

(1 citation statement)

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“…The simultaneous measurements of intensities of four diffracted orders allow the real time complete analysis of the polarization state of light to be carried out (to determine all four Stokes parameters) through the relations developed by Kilosanidze & Kakauridze. [10][11][12] Note that the polarization-holographic element of such configuration forms 6 diffraction orders, only four of which are used during polarization state analysis, At the same time, the intensities of two diffracted orders remain unused which significantly reduces the efficiency of the element. The use of an element of this configuration was caused by the need to use real-existing recording polarization-sensitive materials for which the functions of reaction to polarized light do not satisfy a certain condition.…”

Section: Polarization-holographic Diffraction Elementmentioning

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 Diffraction Elementmentioning

confidence: 99%