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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.2025-2-20-27</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-2305</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>ГОСУДАРСТВЕННЫЕ ЭТАЛОНЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STATE STANDARDS</subject></subj-group></article-categories><title-group><article-title>Государственный первичный эталон единиц оптической силы и коэффициента передачи модуляции очковой оптики и объективов ГЭТ 205-2025</article-title><trans-title-group xml:lang="en"><trans-title>State primary standard of units of optical power and modulation transfer function of spectacle optics and objectives GET 205-2025</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0237-4738</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вишняков</surname><given-names>Г. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Vishnyakov</surname><given-names>G. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Геннадий Николаевич Вишняков</p><p>Москва</p></bio><bio xml:lang="en"><p>Gennady N. Vishnyakov</p><p>Moscow</p></bio><email xlink:type="simple">vish@vniiofi.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>Левина</surname><given-names>Э. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Levina</surname><given-names>E. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Элина Юрьевна Левина</p><p>Москва</p></bio><bio xml:lang="en"><p>Elina U. Levina</p><p>Moscow</p></bio><email xlink:type="simple">elina@vniiofi.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/0000-0002-4356-301X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Минаев</surname><given-names>В. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Minaev</surname><given-names>V. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Леонидович Минаев</p><p>Москва</p></bio><bio xml:lang="en"><p> </p><p>Vladimir L. Minaev</p><p>Moscow</p></bio><email xlink:type="simple">minaev@vniiofi.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений; Московский государственный технический университет имени Н.Э. Баумана</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute for Optical and Physical Measurements; Bauman Moscow State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute for Optical and Physical Measurements</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute for Optical and Physical Measurements; HSE University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>06</month><year>2025</year></pub-date><volume>74</volume><issue>2</issue><fpage>20</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2025</copyright-statement><copyright-year>2025</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/2305">https://www.izmt.ru/jour/article/view/2305</self-uri><abstract><p>Качество формируемого оптической системой изображения определяется её частотно-контрастной характеристикой или коэффициентами передачи модуляции на различных пространственных частотах. Для обеспечения единства измерений коэффициентов передачи модуляции и создания эталонной базы по воспроизведению, хранению и передаче единицы коэффициента передачи модуляции усовершенствован Государственный первичный эталон единиц оптической силы очковой оптики ГЭТ 205-2013 в части воспроизведения единицы коэффициентов передачи модуляции в диапазоне длин волн 450–1550 нм. Представлены состав, принцип работы и основные метрологические характеристики Государственного первичного эталона единиц оптической силы и коэффициента передачи модуляции очковой оптики и объективов ГЭТ 205-2025. В состав ГЭТ 205-2025 входит установка для измерения коэффициентов передачи модуляции оптических систем и набор эталонных объективов. ГЭТ 205-2025 обеспечивает единство измерений коэффициентов передачи модуляции оптических систем в спектральном диапазоне дискретных значений длин волн 450–1550 нм и позволяет передавать эту единицу методом сличения с помощью компаратора рабочим эталонам, в качестве которых выступают меры коэффициентов передачи модуляции в виде линз. От рабочих эталонов методом прямых измерений коэффициент передачи модуляции передаётся соответствующим средствам измерений: устройствам для измерения коэффициентов передачи модуляции, системам измерения частотно-контрастной характеристики, скамьям оптическим, станциям контроля качества оптических систем.</p></abstract><trans-abstract xml:lang="en"><p>The quality of the image formed by the optical system is determined by its modulation transfer function at various spatial frequencies. To ensure the uniformity of measurements of the modulation transfer function and create a reference base for the reproduction, storage and transmission of modulation transfer function, the State primary standard of optical power units for eyeglass optics GET 205-2013 was improved in terms of reproducing the modulation transfer function in the wavelength range 450–1550 nm. The composition, principle of operation and main metrological characteristics of the State primary standard of units of optical power and modulation transfer function of eyeglass optics and objectives GET 205-2025 are presented. The GET 205-2025 includes an installation for measuring the modulation transfer function of optical systems and a set of reference lenses. GET 205-2025 ensures the uniformity of measurements of the modulation transfer function of optical systems in the spectral range of discrete wavelength values 450–1550 nm and allows you to transfer the modulation transfer function by comparison using a comparator to working standards. From working standards by direct measurement, the modulation transfer function is transferred to modulation transfer function measuring instruments: modulation transfer function measuring devices, contrast transfer function measuring systems, optical benches, optical system quality control stations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>государственный первичный эталон</kwd><kwd>коэффициент передачи модуляции</kwd><kwd>объектив</kwd></kwd-group><kwd-group xml:lang="en"><kwd>state primary standard</kwd><kwd>modulation transfer function</kwd><kwd>objective</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в 2024 г. согласно соглашению № 172-03-2024-004 от 16.01.2024 г. о предоставлении субсидий из федерального бюджета организациям на возмещение затрат, связанных с осуществлением расходов в области обеспечения единства измерений «Разработка, совершенствование, содержание государственных первичных эталонов единиц величин, а также разработка и совершенствование государственных первичных референтных методик (методов) измерений»</funding-statement><funding-statement xml:lang="en">The work was completed in 2024 in accordance with Agreement no. 172-03-2024-004 dated January 16, 2024 on the provision of subsidies from the federal budget to organizations for reimbursement of expenses related to the implementation of expenses in the fi eld of ensuring the uniformity of measurements “Development, improvement, maintenance of state primary standards of units of quantities, as well as the development and improvement of state primary reference measurement methods”</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">Гудмен Д. 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