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<p>The quality of an image formed by an optical system is determined by its modulation transfer factors at different spatial frequencies. In order to ensure uniformity in the measurement of modulation transfer factors and to create a&#xa0;standards base for the reproduction, maintenance, and dissemination of the corresponding unit, GET 205-2013 State primary standard for the optical power of spectacle lenses was improved in terms of realizing the unit of the modulation transfer factor within the wavelength range of 450–1550 nm. The composition, operating principle, and main metrological characteristics of GET 205-2025 State Primary Standard for the optical power and modulation transfer function of spectacle lenses and objectives are presented. GET 205-2025 comprises a&#xa0;setup for measuring the modulation transfer factors of optical systems and a&#xa0;set of standard objectives. GET 205-2025 ensures uniformity in measuring the modulation transfer factors of optical systems within the discrete spectral range of 450–1550 nm and provides a&#xa0;means to transfer the corresponding unit to working standards (measures of modulation transfer factors in the form of lenses) by means of a&#xa0;comparator, i.e., via the comparison method. From the working standards, the modulation transfer factor is transferred via the direct measurement method to appropriate measuring instruments: devices and systems for measuring modulation transfer factors, optical benches, and test stations for optical systems.</p>

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GET 205-2025 State Primary Standard for the optical power and modulation transfer function of spectacle lenses and objectives

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Gennady N. Vishnyakov,
  • Elina Yu. Levina,
  • Vladimir L. Minaev

摘要

The quality of an image formed by an optical system is determined by its modulation transfer factors at different spatial frequencies. In order to ensure uniformity in the measurement of modulation transfer factors and to create a standards base for the reproduction, maintenance, and dissemination of the corresponding unit, GET 205-2013 State primary standard for the optical power of spectacle lenses was improved in terms of realizing the unit of the modulation transfer factor within the wavelength range of 450–1550 nm. The composition, operating principle, and main metrological characteristics of GET 205-2025 State Primary Standard for the optical power and modulation transfer function of spectacle lenses and objectives are presented. GET 205-2025 comprises a setup for measuring the modulation transfer factors of optical systems and a set of standard objectives. GET 205-2025 ensures uniformity in measuring the modulation transfer factors of optical systems within the discrete spectral range of 450–1550 nm and provides a means to transfer the corresponding unit to working standards (measures of modulation transfer factors in the form of lenses) by means of a comparator, i.e., via the comparison method. From the working standards, the modulation transfer factor is transferred via the direct measurement method to appropriate measuring instruments: devices and systems for measuring modulation transfer factors, optical benches, and test stations for optical systems.