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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">pimi</journal-id><journal-title-group><journal-title xml:lang="ru">Приборы и методы измерений</journal-title><trans-title-group xml:lang="en"><trans-title>Devices and Methods of Measurements</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-9506</issn><issn pub-type="epub">2414-0473</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2220-9506-2018-9-4-296-305</article-id><article-id custom-type="elpub" pub-id-type="custom">pimi-403</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>Средства измерений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Measuring instruments</subject></subj-group></article-categories><title-group><article-title>Повышение спектрального разрешения многощелевого спектрометра с дифракционной решеткой для спектроскопии с пространственным разрешением</article-title><trans-title-group xml:lang="en"><trans-title>Increasing of Spectral Resolution of Multislit Imaging Spectrometer with Diffractive Grating</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>Гулис</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Gulis</surname><given-names>I. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: Гулис И.М. – Белорусский государственный университет, пр. Независимости, 4, г. Минск 220030, Беларусь.    e-mail: gulis@bsu.by</p></bio><bio xml:lang="en"><p>Address for correspondence: Gulis I.M. – Belarusian State University, Nezavisimosty Ave., 4, Minsk 220030, Belarus.    e-mail: gulis@bsu.by</p></bio><email xlink:type="simple">gulis@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>Купреев</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kupreyeu</surname><given-names>A. G.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian State University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>17</day><month>12</month><year>2018</year></pub-date><volume>9</volume><issue>4</issue><fpage>296</fpage><lpage>305</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гулис И.М., Купреев А.Г., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Гулис И.М., Купреев А.Г.</copyright-holder><copyright-holder xml:lang="en">Gulis I.M., Kupreyeu A.G.</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://pimi.bntu.by/jour/article/view/403">https://pimi.bntu.by/jour/article/view/403</self-uri><abstract><p>Для спектроскопии с пространственным разрешением представляет интерес регистрация нестационарных процессов, в частности мгновенная гиперспектроскопия, позволяющая получать куб данных I(x,y,λ) в одном акте измерения. Целью работы являлось повышение спектрального разрешения в приборах для спектроскопии с пространственным разрешением, в которых пространственная фильтрация изображения объекта осуществляется многощелевой маской, в качестве диспергирующего элемента используется дифракционная решетка (что обеспечивает практически неизменную дисперсию в рабочем спектральном диапазоне), а проекция куба данных представляется в виде совокупности локальных спектров от отдельных фрагментов объекта.</p><p>Изображение на детекторе формируется телецентрической системой из двух объективов, настроенных на бесконечность и расположенных так, что их передние фокусы совпадают. Размещенная в точке совпадения фокусов диафрагма пропускает лишь пучки нужного порядка, что в совокупности с полосовыми светофильтрами на входе устраняет типичную для систем с дифракционной решеткой проблему отсечения всех порядков дифракции кроме рабочего. Предложенный подход реализован в двух разработанных схемных решениях спектрометров: в первом телецентрическая система построена на основе двух многолинзовых изображающих объективов, во втором – на основе внеосевых параболических зеркал.</p><p>В рамках данной работы предложены варианты оптимизации схемных решений, предусматривающие обеспечение нормального падения световых пучков на маску, а также компенсацию кривизны поля изображения, что позволяет повысить разрешение системы и расширить область применения рассмотренных схемных решений многощелевых дисперсионных спектрометров; рассмотрено схемное решение, представляющее собой синтез обоих подходов. Согласно результатам моделирования, полуширина пятен рассеяния в направлении дисперсии Δl ≤ 10 мкм, лишь в отдельных точках поля Δl ≤ 15 мкм, что соответствует пределу спектрального разрешения δλ ≤ 10 нм на диапазоне 450–750 нм.</p></abstract><trans-abstract xml:lang="en"><p>Registration of non-stationary processes, namely snapshot hyperspectral imaging that allows to capture data cube I(x,y,λ) in one measurement act, is of interest for imaging spectroscopy.</p><p>The purpose of the work is increasing of spectral resolution of imaging spectrometers with spatial filtering of object image using multislit mask, where a diffractive grating is used as disperser (providing almost constant dispersion in working spectral range), and the data cube is projected on a detector as a set of local spectra from object fragments.</p><p>An image is formed on detector by a two-objective telecentric system composed from two lenses focused on infinity so that their front focuses are matched. A diaphragm in the match point allows passing only for beams of needed diffraction order, so along with a bandpass filter near the system entrance they solve a typical problem of diffractive systems – elimination of beams of all orders but a needed one. The approach is implemented in two proposed designs of spectrometers: in the first a telecentric system is based on two multi-lens imaging objectives, in the second – is based on two reflective off-axis parabolic objectives.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мгновенная гиперспектроскопия</kwd><kwd>многощелевой дисперсионный спектрометр</kwd><kwd>параболический зеркальный объектив</kwd><kwd>телецентрическая система</kwd></kwd-group><kwd-group xml:lang="en"><kwd>snapshot hyperspectroscopy</kwd><kwd>multislit dispersive spectrometer</kwd><kwd>parabolic mirror lens</kwd><kwd>telecentric system</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">Xie, Y. Remote sensing imagery in vegetation mapping: a review / Y. Xie, Z. Sha, M. Yu // Journ. of Plant Ecology. – 2008. – Vol. 1, no. 1. – P. 9–23. 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