نتایج جستجو برای: light velocity measurement

تعداد نتایج: 944527  

Journal: :IEEE Geoscience and Remote Sensing Letters 2021

In contrast to topographic laser scanning, hydrography must take into account the presence of two media. A pulsed beam, which enters water from air at an oblique angle, is refracted air-water boundary in direction plumb line. This change described by Snellius' law caused a slower speed light wave water, i.e., phase velocity. Light scattering turbidity gives rise further deviations straight path...

2009
O. L. Muskens A. Lagendijk

We present a new broadband technique for the measurement of diffuse light transport through opaque scattering media. Using the spectral correlations introduced by a scattering medium onto a white-light supercontinuum spectrum, the diffusion constant of light is determined over a wide spectral range in the visible and near infrared. Independent broadband measurements of both the transport mean f...

Journal: :Optics letters 2009
O L Muskens A Lagendijk

We present a broadband technique for the measurement of diffuse light transport through opaque scattering media. Using the spectral correlations introduced by a scattering medium onto a white-light supercontinuum spectrum, the diffusion constant of light is determined over a wide spectral range in the visible and the near IR. Independent broadband measurements of both the transport mean free pa...

2012
Ji Ho Jeong Kwanil Lee Je-Myung Jeong Sang Bae Lee

So far, Brillouin scattering based sensors have been studied as promising technology for a distributed temperature or strain measurement in structural health monitoring [1-10]. Intrinsically, Brillouin scattering is an effect caused by acoustic vibrations in the medium when laser light travels in a medium such as an optical fiber. Since the sound wave is traveling, light is also subjected to a ...

Journal: :The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 1902

2009
N. Le Thomas H. Zhang R. Houdré A. Talneau

The dispersive properties of waves are strongly affected by inevitable residual disorder in man-made propagating media, in particular in the slow wave regime. By a direct measurement of the dispersion curve in k space, we show that the nature of the guided modes in real photonic crystal waveguides undergoes an abrupt transition in the vicinity of a band edge. Such a transition that is not highl...

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