II: Dispersion Relations and Phase Retrieval in Optical Spectroscopy

Peiponen, Kai–Erik; Vartiainen, Erik M.; Asakura, Toshimitsu

doi:10.1016/s0079-6638(08)70337-8

Cited by 27 publications

(37 citation statements)

References 79 publications

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“…. The methods used here are discussed in detail in references [15,16,17]. Optical constants deduced using the oscillator model and the maximum entropy model are shown in Figure 10.…”

Section: Optical Modelingmentioning

confidence: 99%

Optical reflection spectroscopy of thick corrosion layers on 304 stainless steel

et al. 2007

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Corrosion resistant structural materials of both iron and nickel based alloys are used in the electric power industry for the construction of the coolant loops of both conventional and nuclear power generating stations. These materials, in the presence of high temperature (e.g. 287° C), high pH (e.g. 10.0 @ 20°C) water with dissolved hydrogen will oxidize and form corrosion films that are double metal oxides (or spinels) of the form AB 2 O 4. This work describes optical reflectivity techniques that have been developed to study the growth of these films in situ. The optical technique uses a dualbeam specular reflection spectrometer to measure the spectrum of reflected light in small angle (i.e. < 15°) scatter. The reflection spectra are then calibrated using a set of corrosion coupons with corrosion films that are well known. Results are compared with models based on multilayer reflection and Mie scattering from a particle size distribution. Surface roughness is found to be the dominant cause of reduced reflection as the films grow.

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“…. The methods used here are discussed in detail in references [15,16,17]. Optical constants deduced using the oscillator model and the maximum entropy model are shown in Figure 10.…”

Section: Optical Modelingmentioning

confidence: 99%

Optical reflection spectroscopy of thick corrosion layers on 304 stainless steel

et al. 2007

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“…This is the starting point of the MEM analysis. Previously (17) has been derived using a more complicated formalism based on the utilization of the entropy concept, calculus of variables, and Lagrange multipliers [75,76] that are not present here.…”

Section: The Maximum Entropy Modelmentioning

confidence: 99%

“…The MEM has been employed in various calculations of linear and nonlinear spectral properties of media with limited spectral range [15][16][17][18][19][20]. Recently, we applied the MEM on the calculation of the optical properties of nanospheres in a liquid matrix [21][22][23], and showed that the effective complex refractive index of the liquid can always be retrieved from the spectral SPR reflectance.…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon resonance reflectance from nanoparticles in a liquid matrix: Retrieval of the optical properties using the maximum entropy model

Saarinen

Vartiainen

Peiponen

2009

Sensors and Actuators B: Chemical

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“…The complex refractive index (complex number) of a red wine can be approximated, by fitting the recorded reflectance curve to Fresnel's equation [15] as follows:…”

Section: Complex Refractive Index and Turbidity Analysismentioning

confidence: 99%

Multifunction spectrometer for optical inspection of red wine

Niskanen

Mutanen

Lehtonen

et al. 2008

Sens. & Instrumen. Food Qual.

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The main goal of this study was to develop an apparatus that makes it possible to measure both, color, refractive index and light scattering (turbidity) of red wines using a single device only. Typically such measurement of red wine quality requires three different measurement devices. As an example of the efficiency of the present device we studied the change of the thermo-optical and time-dependent optical properties of red wine samples. Here we report on change of optical properties of two Merlot wine samples, which were obtained by opening authentic red wine bottles and preserving a set of samples both at room and refrigerator temperature for 26 days, respectively. The interesting feature with both red wine samples was that the light scattering, i.e. the turbidity of the samples, increased as a function of time due to oxidation process. It is suggested that the multifunction spectrophotometer can be applied for optical inspection of red and other wine products.

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II: Dispersion Relations and Phase Retrieval in Optical Spectroscopy

Cited by 27 publications

References 79 publications

Optical reflection spectroscopy of thick corrosion layers on 304 stainless steel

Optical reflection spectroscopy of thick corrosion layers on 304 stainless steel

Surface plasmon resonance reflectance from nanoparticles in a liquid matrix: Retrieval of the optical properties using the maximum entropy model

Multifunction spectrometer for optical inspection of red wine

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