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Opt Lett. 2005 May 15;30(10):1168-70.

Backscattering target detection in a turbid medium by use of circularly and linearly polarized light.

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  • 1Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, City College of New York, Graduate School of City University of New York, New York, New York 10031, USA.


The polarization properties of the backscattered light from a turbid medium containing large-diameter (10.143-microm) and small-diameter (0.202-microm) spherical polystyrene particles are studied. It is shown that the difference in the polarization properties of the emerging light that originates at the target and that is backscattered from the medium allows for improvement of image contrast by use of polarized light. Based on the images obtained by the CCD camera, the polarization memory effect with circularly polarized light is demonstrated to have an advantage over the linear polarization technique in imaging a highly reflective target inside a turbid medium containing large particles.

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