PRISM Research May Overcome Fundamental Imaging Trade-Offs
Electrical Engineering Professor Jason Fleischer and his students Christopher Barsi and Wenjie Wan have developed a new type of imaging that could overcome limitations of current optics, such as the trade-off between magnification (“zooming”) and field of view. Conventional lenses use refraction to bend light rays towards a detector, e.g. retina or film. Since the amount of bending is limited, rays at wide angles that make it through the lens may not be recorded. The new technique uses nonlinear materials to mix the incoming light waves, meaning that information from the lost rays gets transmitted to rays that are detected.The mixing gives an image that is completely distorted at the detector, but he and his group developed a computer algorithm that could unscramble the light.
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Nonlinear Imaging by using and
reconstructing wave mixing.