Journal ArticleDOI
Spectral analysis of a one-dimensional scattering medium with the differential multiply subtractive Kramers-Kronig method
TLDR
In this paper, the phase spectrum is reconstructed from the amplitude spectrum in a finite spectral range with the aid of one or more phase-anchoring values using spectral ballistic imaging to partially mitigate the finite-range effects.Abstract:
The differential multiply subtractive Kramers-Kronig (DMSKK) method is utilized for deriving the optical spectral response of a 1D scattering medium The technique is based on the multiply subtractive Kramers-Kronig technique, where the phase spectrum is reconstructed from the amplitude spectrum in a finite spectral range with the aid of one or more phase-anchoring values We employ a new phase-anchoring technique in the DMSKK method to partially mitigate the finite-range effects This method incorporates spectral ballistic imaging to anchor the phase difference (instead of the phase directly) at one or more reference wavelengths The simplicity of phase derivative measurements and its utilization in the DMSKK method are emphasized by a simple experimentread more
Citations
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Journal ArticleDOI
Optical imaging of hidden objects behind clothing
TL;DR: Results are presented of an experimental technique that was developed for acquiring the impulse response, based upon the Kramers-Kronig algorithm, and have been applied for optical imaging of objects hidden behind clothing.
Journal ArticleDOI
Theoretical study on the electronic and optical properties of bulk and surface (001) In x Ga 1-x As
Xuefei Liu,Xuefei Liu,Zhao Ding,Zijiang Luo,Xun Zhou,Jiemin Wei,Wang Yi,Xiang Guo,QiZhi Lang +8 more
TL;DR: In this article, the optical properties of surface and bulk InxGa1-xAs materials are compared systematically for the first time, and the results show that the considered optical properties vary with increasing indium composition in an opposite way.
Journal ArticleDOI
Combined analysis of static and dynamic extinction characteristics of microbial spores and mycelia as a mid-infrared extinction material
TL;DR: In this article, a method via combined static and dynamic analysis extinction performance is presented, combining with the reflection spectra measured by a Nicolet FT-IR spectrometer, and transmittance determined by smoke box test of microbial materials in 3 ∼ 5 μ m.
Journal ArticleDOI
Efficient impulse response reconstruction from the amplitude spectrum
TL;DR: An efficient digital signal processing algorithm is suggested, which includes several fast Fourier transforms, to efficiently reconstruct the impulse response of a diffusive medium from its amplitude spectrum.
Journal ArticleDOI
Efficient phase spectrum reconstruction with the discrete multiply subtractive anchoring algorithm
Er'el Granot,Shmuel Sternklar +1 more
TL;DR: In this paper, the authors apply the multiply subtractive anchoring method for phase spectrum retrieval, which is based on the fast Fourier transform and Lagrange polynomials.
References
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Journal ArticleDOI
On the Theory of Dispersion of X-Rays
TL;DR: In this article, a general formula for the index of refraction in terms of the atomic absorption coefficient α and the critical frequencies is given, from the condition, experimentally verified, that the electrons in the atom for impressed frequencies, large compared to their natural frequencies, shall act like free electrons as far as the index is concerned, a relation is obtained for α.
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Spectroscopy and Imaging with Diffusing Light
Arjun G. Yodh,Britton Chance +1 more
TL;DR: Visually opaque media are ubiquitous in nature as mentioned in this paper, and light is transported through these materials in a process similar to heat diffusion, where a vanishingly small number of photons travel straight through such substances.
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Optical image reconstruction using frequency-domain data: simulations and experiments
TL;DR: In this paper, a finite-element reconstruction algorithm for optical data based on a diffusion equation approximation is presented and confirmed by a series of simulations and experiments using phantoms having optical properties in the range of those expected for tissues.
Journal ArticleDOI
Modified Kramers–Kronig Analysis of Optical Spectra
TL;DR: In this article, a modified Kramers-Kronig integral is derived, which offers greater convergence than the conventional expression when reflectance data are available over a limited range.
Journal ArticleDOI
Exciton-Optical Properties of TlBr and TlCl
TL;DR: In this article, the effect of strain on thallous-halide films has been investigated, and a technique developed for producing essentially strain-free films was developed for the optical constants.