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<p>Transmittance and reflectance spectra of a commercial 200-μm-thick polyimide film were recorded in the wavelength range <i>λ</i> = 240–2500 nm. The spectral dependences of the real (<i>n</i>) and imaginary (<i>k</i>) parts of the refractive index of the film were calculated from these spectra using the known exact analytical relations. Absorption spectra and the real and imaginary parts of the dielectric permittivity were also calculated in the indicated wavelength range.</p>

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Optical-Constants Spectra of Commercial Polyimide Film in the Wavelength Range 240–2500 nm

  • 期刊论文

  • 发表日期：

    2025年9月20日

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  • V. S. Antropova,
  • I. A. Zlobin,
  • G. M. Mikheev

摘要

Transmittance and reflectance spectra of a commercial 200-μm-thick polyimide film were recorded in the wavelength range λ = 240–2500 nm. The spectral dependences of the real (n) and imaginary (k) parts of the refractive index of the film were calculated from these spectra using the known exact analytical relations. Absorption spectra and the real and imaginary parts of the dielectric permittivity were also calculated in the indicated wavelength range.