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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2023-59-2-158-167</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-715</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Соотношения взаимности для интерференционных покрытий</article-title><trans-title-group xml:lang="en"><trans-title>Reciprocity relations for interference coatings</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сотский</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Sotsky</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сотский Александр Борисович – доктор физико-математических наук, профессор, профессор кафедры физики и компьютерных технологий</p><p>ул. Космонавтов, 1, 212022, Могилев</p></bio><bio xml:lang="en"><p>Alexander B. Sotsky – Dr. Sc. (Physics and Mathematics), Professor, Professor of the Department of Physicsand Computer Technologies</p><p>1, Kosmonavtov Str., 212022, Mogilev</p></bio><email xlink:type="simple">ab_sotsky@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чудаков</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chudakov</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чудаков Евгений Александрович – аспирант,младший научный сотрудник</p><p>ул. Космонавтов, 1, 212022, Могилев</p></bio><bio xml:lang="en"><p>Evgeny A. Chudakov – Postgraduate Student, JuniorResearcher</p><p>1, Kosmonavtov Str., 212022, Mogilev</p></bio><email xlink:type="simple">kenni_mark@bk.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Могилевский государственный университет имени А. А. Кулешова</institution></aff><aff xml:lang="en"><institution>Mogilev State A. Kuleshov&#13;
University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Могилевский государственный университет имени А. А. Кулешова</institution></aff><aff xml:lang="en"><institution>Mogilev State A. Kuleshov University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>06</day><month>07</month><year>2023</year></pub-date><volume>59</volume><issue>2</issue><fpage>158</fpage><lpage>167</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сотский А.Б., Чудаков Е.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Сотский А.Б., Чудаков Е.А.</copyright-holder><copyright-holder xml:lang="en">Sotsky A.B., Chudakov E.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/715">https://vestifm.belnauka.by/jour/article/view/715</self-uri><abstract><p>Путем анализа волновых уравнений обосновано совпадение энергетических коэффициентов отражения и пропускания для волн s- и p-поляризации при их падении на интерференционное покрытие со встречных направлений. Покрытие может характеризоваться произвольным пространственным профилем показателя преломления, ограничивающим условием является отсутствие в покрытии оптических потерь. Получены соотношения взаимности для энергетических коэффициентов отражения и прохождения естественного света для структуры в виде плоскопараллельной диэлектрической пластины с интерференционными покрытиями на ее противоположных сторонах. Показано, что при освещении структуры с поглощающей пластиной во встречных направлениях энергетические коэффициенты отражения могут различаться, а энергетические коэффициенты прохождения всегда совпадают. Использование соотношений взаимности для упрощения вычислений проиллюстрировано на примере расчета широкополосных просветляющих интерференционных покрытий, состоящих из чередующихся слоев Nb2O5 и SiO2, нанесенных на пластину из поликарбоната. В результате подтверждена корректность этих соотношений и показано, что оптимизированное просветляющее двухстороннее интерференционное покрытие обеспечивает примерно в 5 раз меньший по величине средний энергетический коэффициент отражения по сравнению с оптимизированным односторонним покрытием. </p></abstract><trans-abstract xml:lang="en"><p>By analyzing the wave equations, the coincidence of the energy reflection and transmission coefficients for the s- and p-polarization waves is herein substantiated when they are incident on the interference coating from opposite directions. The coating can be characterized by an arbitrary spatial profile of the refractive index, the limiting condition is the absence of optical losses in it. Reciprocity relations are obtained for the energy reflection and transmission coefficients of natural light for a structure in the form of a plane-parallel dielectric plate with interference coatings on its opposite sides. It is shown that when a structure with an absorbing plate is illuminated in opposite directions, the energy reflection coefficients can differ, while the energy transmission coefficients always coincide. Reciprocity relations are applied to the calculation of broadband antireflective interference coatings consisting of alternate layers Nb2O5 and SiO2 deposited on a polycarbonate plate. As a result, their correctness is confirmed and it is shown that the optimized antireflection two-sided interference coating provides approximately a five times lower averaged energy reflection coefficient compared to the optimized one-sided coating. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>интерференционное покрытие</kwd><kwd>соотношения взаимности</kwd><kwd>просветляющее покрытие</kwd></kwd-group><kwd-group xml:lang="en"><kwd>interference coating</kwd><kwd>reciprocity relations</kwd><kwd>antireflection coating</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Broadband antireflection coatings for visible and infrared ranges / F. Lemarquis [et al.] // CEAS Space J. – 2019. – Vol. 11, № 4. – P. 567–568. https://doi.org/10.1007/s12567-019-00266-8</mixed-citation><mixed-citation xml:lang="en">Lemarquis F., Begou T., Moreau A., Lumeau J. 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