Influence of size parameter and refractive index of the scatterer on polarization-gated optical imaging through turbid media |
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Authors: | Shukla Prashant Sumathi R Gupta Sharad Pradhan Asima |
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Affiliation: | Department of Physics and Center for Laser Technology, Indian Institute of Technology Kanpur, India. |
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Abstract: | The influence of incident polarized light, refractive index, and size parameter of the scatterer on achievable resolution and contrast (image quality) of polarization-gated transillumination imaging in turbid media is reported here. Differential polarization detection led to significant improvement of image quality of an object embedded in a medium of small-sized scatterers (diameter Dor=lambda,g>or=0.7), the improvement in image quality was less pronounced using either linear or circular polarization gating when the refractive index of the scatterer was high (ns=1.59), but for a lower value of refractive index (ns=1.37), image quality improved with the differential circular polarization gating. We offer a plausible explanation for these observations. |
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