18 August 1997 Frequency domain NIR measurements with optical fibers: limits and perspectives
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Abstract
NIR spectroscopy and imaging are having an increasing interest as not invasive diagnostics, for the evolution experienced in the last years by both instrumentation technology and interpretation models. In the frequency domain, the informative content of the diffusive photons waves is primarily limited by the approximation of the reconstruction algorithm, according to the measurement precision of the whole diagnostic apparatus. In this work, the influence of optical fiber delivery and collection systems has been studied, to determine signal amplitudes and phase errors, according to refractive effects at the coupling areas, and to propagation effects as intermodal dispersion induced by bending and other mechanical instabilities of the fibers.
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Renzo Salimbeni, Renzo Salimbeni, G. Marconi, G. Marconi, Roberto Pini, Roberto Pini, Matteo Vannini, Matteo Vannini, } "Frequency domain NIR measurements with optical fibers: limits and perspectives", Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); doi: 10.1117/12.280303; https://doi.org/10.1117/12.280303
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