Try out PMC Labs and tell us what you think. Learn More. The time-reversed ultrasonically encoded TRUE optical focusing technique is a method that is capable of focusing light deep within a scattering medium. This study sheds light on the allocation of photon budget in each step of the TRUE technique, the impact of low signal on the phase measurement error, and the eventual impact of the phase measurement error on the strength of the TRUE optical focus. Because biological tissues are optically turbid, biomedical optical techniques have very limited penetration depth.
Penetration of Laser Light at 808 and 980 nm in Bovine Tissue Samples
Penetration of Laser Light at and nm in Bovine Tissue Samples
Try out PMC Labs and tell us what you think. Learn More. Background data: Low-level laser therapy LLLT is frequently used to treat musculoskeletal pathologies. Some of the therapeutic targets are several centimeters deep. Power density measurements were taken for each wavelength at the various depths.
At the present, synthetic aperture radar is the only sensor technology capable of large-area recording of high-resolution image data, day and night and independent of weather conditions. The independence of weather is of fundamental importance for observing tropical rain forests, which are very frequently covered by thick clouds. But the systematic monitoring of many other areas also requires a sensor that delivers the necessary measurement data every pass, in spite of the cloud cover and rain. For observing Polar Regions over the whole year, it is moreover necessary that the imaging be independent of the illumination by the sun. Only thus can glacial motion, variations in ice growth, ice structure changes etc.
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