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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">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2023-1-36-43</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1488</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>ТЕПЛОФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THERMOPHYSIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Температуропроводность оптических материалов и изделий:  определение термографическим экспресс-способом без вырезки образцов из массива</article-title><trans-title-group xml:lang="en"><trans-title>Measurement of the thermal diffusivity of optical materials and products by a new thermographic express method that does not require cutting samples from bulk</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6804-7057</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Головин</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Golovin</surname><given-names>Yu. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Иванович Головин</p><p>Тамбов</p><p>Москва</p></bio><bio xml:lang="en"><p>Yuri I. Golovin</p><p>Tambov</p><p>Moscow</p></bio><email xlink:type="simple">yugolovin@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9600-8140</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самодуров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Samodurov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Алексеевич Самодуров</p><p>Тамбов</p></bio><bio xml:lang="en"><p>Alexander A. Samodurov</p><p>Tambov</p></bio><email xlink:type="simple">samsasha@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Головин</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Golovin</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Юрьевич Головин</p><p>Тамбов</p></bio><bio xml:lang="en"><p>Dmitri Yu. Golovin</p><p>Tambov</p></bio><email xlink:type="simple">tarlin@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8020-2507</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тюрин</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tyurin</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Иванович Тюрин</p><p>Тамбов</p></bio><bio xml:lang="en"><p>Alexander I. Tyurin</p><p>Tambov</p></bio><email xlink:type="simple">tyurin@tsu.tmb.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7578-0505</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дивин</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Divin</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Георгиевич Дивин</p><p>Тамбов</p></bio><bio xml:lang="en"><p>Alexander G. Divin</p><p>Tambov</p></bio><email xlink:type="simple">agdv@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Захаров</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakharov</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Андреевич Захаров</p><p>Тамбов</p></bio><bio xml:lang="en"><p>Yuri А. Zakharov</p><p>Tambov</p></bio><email xlink:type="simple">sci.zah@ya.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тамбовский государственный университет им. Г. Р. Державина; Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Derzhavin Tambov State University;</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Тамбовский государственный университет им. Г. Р. Державина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Derzhavin Tambov State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Тамбовский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tambov State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>20</day><month>03</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>36</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1488">https://www.izmt.ru/jour/article/view/1488</self-uri><abstract><p>Дан краткий обзор методов измерения температуро- и теплопроводности твёрдых материалов и показано, что применение большинства методов требует вырезки из исследуемых материалов образцов определённой геометрии, поэтому данные методы малопригодны для контроля готовой продукции. Предложен экспресс-метод определения температуро- и теплопроводности полупрозрачных материалов (элементов оптики), не требующий вырезки образца из контролируемого объекта. Суть метода заключается в регистрации и анализе нестационарного температурного поля на поверхности объекта контроля с помощью скоростной тепловизионной камеры. В качестве регистратора динамического температурного поля применён тепловизор – бесконтактный и быстродействующий прибор, обрабатывающий большой объём информации (каждый из сотен тысяч пикселов матрицы профессионального тепловизора является датчиком температуры в малой области поверхности). Пятно нестационарного нагрева создано сфокусированным пучком лазера. Предложен ступенчатый режим работы лазера – скачкообразное включение и работа в режиме непрерывного облучения с постоянной интенсивностью в течение всего времени измерений. Информация о температуро- и теплопроводности получена при изучении нестационарного температурного поля, образованного путём распространения тепловой энергии из пятна на периферию. Коэффициент температуропроводности определён по первичным данным тепловизора с использованием оригинальных алгоритма и программного обеспечения. Установлена специфика измерений температуро- и теплопроводности полупрозрачных материалов (элементов оптики): малый коэффициент поглощения излучения и возможная кривизна поверхности (например, линз), которая требует принятия специальных мер. Вследствие большого объёма информации, содержащейся в динамических картинах теплового поля, и возможности усреднения по большому массиву данных, среднее квадратическое отклонение результата измерения коэффициента температуропроводности не превышает 2 %. Учёт особенностей предложенного метода даёт возможность создавать портативные средства измерений теплофизических характеристик и контроля качества оптических материалов и изделий в производственных условиях, а также оценивать степень деградации свойств материалов и изделий в полевых условиях.</p></abstract><trans-abstract xml:lang="en"><p>Thermal diffusivity a and thermal conductivity λ are important for many building, structural and functional material applications. They determine the intensity of heat transfer, the quality of thermal insulation, the rate of heating / cooling, reaching a stationary mode, and the efficiency of power equipment. In laser technology, the radiation strength of the optical components of the system depends upon them, and in laser technologies with material removal they determine the speed and quality of processing. Most methods for measuring a and λ in solid materials require cutting out samples of a certain geometry, which makes them unsuitable for testing finished products. The paper proposes and describes an express method for determining a and λ in translucent materials, which does not require cutting a sample from a controlled object. It consists in the analysis of a non-stationary temperature field on the surface of the test object using a high-speed thermal imaging camera. The unsteady heating spot was created by a focused laser beam. It was switched on abruptly and operated in the mode of continuous irradiation with a constant intensity during the entire time of measurements. Heat propagated from this spot to the periphery, creating a non-stationary temperature field containing information about a and λ. The a value was extracted from the primary data using original algorithms and software. A thermal imager, as a recorder of a dynamic temperature field, provides a number of advantages – non-contact, high speed and a large amount of information (each of the many hundreds of thousands of pixels of a professional thermal imager matrix is a temperature sensor in a small surface area). Measurements of a and λ in semitransparent materials of laser optics have their own specifics. The low radiation absorption coefficient and the possible curvature of the surface (for example, in lenses) require special measures, which are described in the article. Due to the large amount of information contained in the dynamic patterns of the thermal field and the possibility of averaging over a large data array, the RMS of the thermal diffusivity measurement does not exceed 2 %.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>теплофизические характеристики</kwd><kwd>коэффициент температуропроводности</kwd><kwd>оптические материалы</kwd><kwd>инфракрасная термография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermophysical characteristics</kwd><kwd>thermal diffusivity</kwd><kwd>optical materials</kwd><kwd>infrared thermography</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">: работа выполнена при поддержке Российского научного фонда (грант № 20-19-00602) и частичной поддержке Министерства науки и высшего образования Российской Федерации в рамках проекта по соглашению № 075-15-2021-709 (уникальный идентификатор проекта RF-2296.61321X0037), направленного на поддержку оборудования Центра коллективного пользования (ЦКП) ТГУ им. 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