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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1791</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>СПЕКТРОСКОПИЯ ТВЕРДЫХ ТЕЛ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPECTROSCOPY OF SOLIDS</subject></subj-group></article-categories><title-group><article-title>Спектральные зависимости оптических констант коммерческой полиимидной пленки в диапазоне длин волн 240—2500 нм</article-title><trans-title-group xml:lang="en"><trans-title>Optical Constants Spectra of Commercial Polyimide Film in the Wavelength Range of 240—2500 nm</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>Антропова</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zlobin</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ижевск</p></bio><bio xml:lang="en"><p>Izhevsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Злобин</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Antropova</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ижевск</p></bio><bio xml:lang="en"><p>Izhevsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3607-5795</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михеев</surname><given-names>Г. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikheev</surname><given-names>G. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михеев Геннадий М. - д.ф.-м.н., профессор, главный научный сотрудник, руководитель, лаборатория лазерных методов исследований УдмФИЦ УрО РАН.</p><p>Ижевск</p></bio><bio xml:lang="en"><p>Gennady M. Mikheev.</p><p>Izhevsk</p></bio><email xlink:type="simple">mikheev@udman.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Удмуртский федеральный исследовательский центр УрО РАН</institution></aff><aff xml:lang="en"><institution>Udmurt Federal Research Center, Ural Branch of the Russian Academy of Sciences</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>09</month><year>2025</year></pub-date><volume>92</volume><issue>4</issue><fpage>445</fpage><lpage>450</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Антропова В.С., Злобин И.А., Михеев Г.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Антропова В.С., Злобин И.А., Михеев Г.М.</copyright-holder><copyright-holder xml:lang="en">Zlobin I.A., Antropova V.S., Mikheev G.M.</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://zhps.ejournal.by/jour/article/view/1791">https://zhps.ejournal.by/jour/article/view/1791</self-uri><abstract><p>Измерены спектры пропускания и отражения коммерческой полиимидной пленки толщиной 200 мкм в диапазоне длин волн λ = 240—2500 нм. С применением известных точных аналитических соотношений из измеренных спектров рассчитаны спектральные зависимости действительной (n) и мнимой (k) частей показателя преломления пленки. В указанном диапазоне длин волн рассчитаны спектры поглощения, действительная и мнимая части диэлектрической проницаемости.</p></abstract><trans-abstract xml:lang="en"><p>Transmittance and reflectance spectra of a commercial 200 μm thick polyimide film were recorded in the wavelength range of λ = 240—2500 nm. By applying the known exact analytical relations, these spectra were used to calculate the spectral dependencies of an imaginary (n) and a real (k) part of the refractive index of the film. In the indicated wavelength range the absorption spectra, real and imaginary parts of the dielectric permittivity were also calculated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коэффициенты пропускания и отражения</kwd><kwd>дисперсия оптических констант</kwd><kwd>аномальная дисперсия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>transmittance and reflectance</kwd><kwd>dispersion of optical constants</kwd><kwd>anomalous dispersion</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства науки и высшего образования РФ (№ гос. регистрации 1022040600237-3-1.3.2) с использованием оборудования ЦКП “Центр физических и физико-химических методов анализа, исследования свойств и характеристик поверхности, наноструктур, материалов и изделий” УдмФИЦ УрО РАН.</funding-statement><funding-statement xml:lang="en">State assignment of the Ministry of Science and Higher Education of the Russian Federation (state registration number 1022040600237-3-1.3.2)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">M. 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