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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-1672</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>ПРИБОРЫ И МЕТОДЫ СПЕКТРОСКОПИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DEVICES AND METHODS OF SPECTROSCOPY</subject></subj-group></article-categories><title-group><article-title>Электрически управляемая жидкокристаллическая твист-планар линза Френеля</article-title><trans-title-group xml:lang="en"><trans-title>Electrically Controlled Liquid Crystal Twist-Planar Fresnel Lens</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>Мельникова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Melnikova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">Melnikova@bsu.by</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>Пантелеева</surname><given-names>Е. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Panteleeva</surname><given-names>E. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Горбач</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbach</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Толстик</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Tolstik</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Рушнова</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Rushnova</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Кабанова</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kabanova</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>23</day><month>10</month><year>2024</year></pub-date><volume>91</volume><issue>5</issue><fpage>741</fpage><lpage>746</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мельникова Е.А., Пантелеева Е.П., Горбач Д.В., Толстик А.Л., Рушнова И.И., Кабанова О.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Мельникова Е.А., Пантелеева Е.П., Горбач Д.В., Толстик А.Л., Рушнова И.И., Кабанова О.С.</copyright-holder><copyright-holder xml:lang="en">Melnikova E.A., Panteleeva E.P., Gorbach D.V., Tolstik A.L., Rushnova I.I., Kabanova O.S.</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/1672">https://zhps.ejournal.by/jour/article/view/1672</self-uri><abstract><p>   На основе метода фотоориентации азокрасителя AtA-2 разработана электрически управляемая линза Френеля, представляющая собой микроструктурированный жидкокристаллический элемент с чередующимися кольцами с твист- и планарной ориентациями директора жидкого кристалла. Показано, что использование управляющего напряжения позволяет контролировать эффективность фокусировки лазерного излучения, а также выключать линзу. Определено оптимальное управляющее напряжение (~3 В), при котором достигается максимальная эффективность фокусировки и удовлетворительное качество построения изображений в широком спектральном диапазоне от 530 нм до 1.1 мкм.</p></abstract><trans-abstract xml:lang="en"><p>   Based on the method of photo-orientation of azo dye AtA-2, an electrically controllable Fresnel lens has been developed, representing a microstructured liquid crystal element with alternating rings with twist- and planar orientations of the liquid crystal director. It is shown that the use of the control voltage allows one to control the efficiency of laser radiation focusing, as well as to turn off the lens. The optimum value of the control voltage (~3 V) is determined, at which the maximum focusing efficiency and satisfactory quality of imaging in a wide spectral range from 530 nm to 1.1 μm are achieved.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>линза Френеля</kwd><kwd>дифракционная линза</kwd><kwd>нематический жидкий кристалл</kwd><kwd>фотоориентация</kwd><kwd>электрически управляемая дифракция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Fresnel lens</kwd><kwd>diffraction lens</kwd><kwd>nematic liquid crystal</kwd><kwd>photo-orientation</kwd><kwd>electrically controlled diffraction</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке ГПНИ “Конвергенция-2025”</funding-statement><funding-statement xml:lang="en">The work was carried out with the financial support of the State Research Institute “Convergence-2025”</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">Y.-H. 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