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Guidestar-free image-guided wavefront-shaping

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Document pages: 11 pages

Abstract: Optical imaging through scattering media is a fundamental challenge in manyapplications. Recently, substantial breakthroughs such as imaging throughbiological tissues and looking around corners have been obtained by the use ofwavefront-shaping approaches. However, these require an implanted guide-starfor determining the wavefront correction, controlled coherent illumination, andmost often raster scanning of the shaped focus. Alternative novel computationalapproaches that exploit speckle correlations, avoid guide-stars and wavefrontcontrol but are limited to small two-dimensional objects contained within thememory-effect correlations range. Here, we present a new concept, image-guidedwavefront-shaping, allowing non-invasive, guidestar-free, widefield, incoherentimaging through highly scattering layers, without illumination control. Mostimportantly, the wavefront-correction is found even for objects that are largerthan the memory-effect range, by blindly optimizing image-quality metrics. Wedemonstrate imaging of extended objects through highly-scattering layers andmulti-core fibers, paving the way for non-invasive imaging in variousapplications, from microscopy to endoscopy.

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