Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Barbara Kilosanidze; George Kakauridze; Irakli Chaganava; Teimuraz Kvernadze; Georgi Kurkhuli; Luis Oriol; Milagros Piñol; Qi-Huo Wei

doi:10.1117/12.2677357

4 October 2023 Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy

Barbara Kilosanidze, George Kakauridze, Irakli Chaganava, Teimuraz Kvernadze, Georgi Kurkhuli, Luis Oriol, Milagros Piñol, Qi-Huo Wei

Author Affiliations +

Proceedings Volume 12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV; 126770U (2023) https://doi.org/10.1117/12.2677357
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

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 real-time 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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Barbara Kilosanidze, George Kakauridze, Irakli Chaganava, Teimuraz Kvernadze, Georgi Kurkhuli, Luis Oriol, Milagros Piñol, and Qi-Huo Wei "Application of the polarization-holographic imaging Stokes spectropolarimeter in astronomy", Proc. SPIE 12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, 126770U (4 October 2023); https://doi.org/10.1117/12.2677357

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