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Luo, Qiaoen; Patel, Justin A; Webb, Kevin J (, Physical Review Research)A randomly scattering analyzer with a multi-element fixed detector aperture located in the far field is introduced as a means to access enhanced spatial sensing information associated with far-subwavelength spatial features. This sensing method allows far-subwavelength spatial resolution with coherent fields scattered from a moving object, or some other relative change that causes a modified field incident on the detector aperture. Experimental optical speckle correlation data with a translated diffusing structure show the salient features, and understanding in relation to the experimental variables is supported by numerical simulations. The conclusion is that more-heavily-scattering analyzers provide better spatial resolution because the measurements are more sensitive to changes in the incident field. Such randomly scattering analyzers offer a new dimension for sensitive coherent optical metrology related to various sensing and motion application domains requiring large offset distances.more » « less
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Bentz, Brian Z.; Lin, Dergan; Patel, Justin A.; Webb, Kevin J. (, IEEE Transactions on Image Processing)
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