Technology of infrared radiation polarizer

Valentin G. Kolobrodov; Grygorij S. Tymchik; Volodymyr I. Mykytenko; Anatolii M. Kylivnyk; Ryszard Romaniuk; Piotr Kisała; Ainur Kozbakova; Bakhyt Yeraliyeva

doi:10.1117/12.2569786

12 June 2020 Technology of infrared radiation polarizer

Valentin G. Kolobrodov, Grygorij S. Tymchik, Volodymyr I. Mykytenko, Anatolii M. Kylivnyk, Ryszard Romaniuk, Piotr Kisała, Ainur Kozbakova, Bakhyt Yeraliyeva

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Proceedings Volume 11456, Optical Fibers and Their Applications 2020; 1145609 (2020) https://doi.org/10.1117/12.2569786
Event: Optical Fibers and Their Applications 2020, 2020, Bialowieza, Poland

Abstract

Among the various characteristics of infrared radiation, the degree of polarization is not often used in radiation analysis. The main reason is that polarization is less informative characteristic compared to others for most practical tasks. Also obtaining polarized radiation in infrared spectrum is relative complex and expensive act. In some cases, such as remote sensing, the improvement of spatial, radiometric and spectral resolution approaches it’s physical limit. It becomes relevant to obtain additional information of a different nature, such as polarization information. Modern infrared radiation polarizers based on diffraction gratings are quite expensive. The article explores the possibility of creating infrared polarizers based on a planeparallel plate, to which radiation falls at an Brewster angle. It is shown that the polarizer operating on transmittance will be more efficient than reflecting radiation polarizer, since it does not deviate the optical axis by a significant angle. Such a polarizer provides a polarization degree of 90% and a transmittance of about 50%.

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Valentin G. Kolobrodov, Grygorij S. Tymchik, Volodymyr I. Mykytenko, Anatolii M. Kylivnyk, Ryszard Romaniuk, Piotr Kisała, Ainur Kozbakova, and Bakhyt Yeraliyeva "Technology of infrared radiation polarizer", Proc. SPIE 11456, Optical Fibers and Their Applications 2020, 1145609 (12 June 2020); https://doi.org/10.1117/12.2569786

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KEYWORDS

Polarization

Polarizers

Germanium

Infrared radiation

Reflection

Transmittance

Refraction

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