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Handbook of Coherent-Domain Optical Methods: Biomedical by Dmitry A. Zimnyakov (auth.), Valery V. Tuchin (eds.)

By Dmitry A. Zimnyakov (auth.), Valery V. Tuchin (eds.)

This instruction manual presents finished insurance of laser and coherent-domain equipment as utilized to biomedicine, environmental tracking, and fabrics technological know-how. all over the world leaders in those fields describe the basics of sunshine interplay with random media and current an outline of simple examine. the newest effects on coherent and polarization homes of sunshine scattered by way of random media, together with tissues and blood, speckles formation in a number of scattering media, and different non-destructive interactions of coherent gentle with tough surfaces and tissues, let the reader to appreciate the foundations and purposes of coherent diagnostic concepts. The accelerated moment variation has been completely up-to-date with specific emphasis on novel coherent-domain suggestions and their functions in drugs and environmental technological know-how. quantity 1 describes cutting-edge equipment of coherent and polarization optical imaging, tomography and spectroscopy; diffusion wave spectroscopy; elastic, quasi-elastic and inelastic gentle scattering spectroscopy and imaging; electronic holographic microscopy, the Fourier remodel mild scattering technique, and coherent diffractive imaging; wavefront sensing, aberration size and adaptive optics for ophthalmology; and laser distant sensing. quantity 2 provides the recent and transforming into box of coherent optics in optical coherence tomography (OCT). a number of functions of OCT and confocal microscopy, together with biomedical endoscopy, are mentioned. a distinct part covers Mueller matrix polarimetry, nonlinear laser fluorescence spectroscopy, and triplet-triplet annihilation assisted upconversion as optical instruments for probing the actual parameters of fabrics and typical natural compounds.

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Extra resources for Handbook of Coherent-Domain Optical Methods: Biomedical Diagnostics, Environmental Monitoring, and Materials Science

Example text

This promising possibility of DWS burn depth diagnostics was demonstrated by D. Boas and A. Yodh [50] using the pig burn model suggested by N. Nishioka and K. Schomacker at the Wellman Institute in Boston (Fig. 16). A He-Ne laser with an output power of 8 mW was used as the light source in their experiments. The laser light was coupled into a multi-mode optical fiber with a core diameter of 200 mm. 4 mm with respect to the source fiber. The light-collecting fibers were connected to a photodetector (photon-counting photo-multiplier tube (PMT)) via an electronically controlled fiber-optical switch.

5). The values of tcd were determined by the method illustrated in Fig. 4. Normalized values of module of the field correlation functions were obtained from experimentally measured intensity correlation functions by using the Siegert relation. Moreover, measurements of the “conventional” correlation time as the half-width of the normalized field correlation functions were performed. 5 shows a logarithmic plot of the experimentally measured concentration dependences of tcd and Dt0:5 (“conventional” correlation time estimated as the halfwidth of the correlation peak).

18) where Dg ¼ clà =3 is the photon diffusion coefficient, c is the light speed in the scattering medium, and ms 0 is the reduced scattering coefficient. It should be noted that the term 1 0 2 2  r ðtÞ vm ko D 3 s describes additional losses of correlation due to dynamic scattering in disordered media and can be interpreted as “correlation absorption” caused by the dynamic processes. The presence of any kind of scattering medium dynamics is manifested as the appearance of the additional “absorbance” term in the correlation diffusion equation.

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