Direct determination of diffusion properties of random media from speckle contrast. Extended depth of field through wave-front coding. in Image Recovery: Theory and Application (ed. Phase retrieval algorithms: a comparison. Looking through walls and around corners. Correlations and fluctuations of coherent wave transmission through disordered media. Memory effects in propagation of optical waves through disordered media. Knox–Thompson and triple-correlation imaging through atmospheric turbulence. Laser Speckle and Related Phenomena (Springer, 1984).Īyers, G., Northcott, M. Attainment of diffraction limited resolution in large telescopes by Fourier analysing speckle patterns in star images. Imaging blood cells through scattering biological tissue using speckle scanning microscopy. Non-invasive imaging through opaque scattering layers. Superpenetration optical microscopy by iterative multiphoton adaptive compensation technique. Controlling light in scattering media non-invasively using the photoacoustic transmission matrix. Speckle-scale focusing in the diffusive regime with time reversal of variance-encoded light (TROVE). Photoacoustic-guided convergence of light through optically diffusive media. Deep-tissue focal fluorescence imaging with digitally time-reversed ultrasound-encoded light. Fluorescence imaging beyond the ballistic regime by ultrasound-pulse-guided digital phase conjugation. Time-reversed ultrasonically encoded optical focusing into scattering media. Image restoration through thin turbid layers by correlation with a known object. Looking around corners and through thin turbid layers in real time with scattered incoherent light. Imaging through turbid layers by scanning the phase conjugated second harmonic radiation from a nanoparticle. Hsieh, C.-L., Pu, Y., Grange, R., Laporte, G. Exploiting disorder for perfect focusing. Scattered light fluorescence microscopy: imaging through turbid layers. High-speed scattering medium characterization with application to focusing light through turbid media. Image transmission through an opaque material. Popoff, S., Lerosey, G., Fink, M., Boccara, A. Control of light transmission through opaque scattering media in space and time. Focusing and compression of ultrashort pulses through scattering media. In situ wavefront correction and its application to micromanipulation. Measuring the transmission matrix in optics: an approach to the study and control of light propagation in disordered media. Focusing coherent light through opaque strongly scattering media. Controlling waves in space and time for imaging and focusing in complex media. Image-based adaptive optics for two-photon microscopy. Principles of Adaptive Optics 3rd edn (Academic, 2010).ĭébarre, D. Holographic imaging through a random medium. Wavefront-reconstruction imaging through random media. Going deeper than microscopy: the optical imaging frontier in biology. Speckle Phenomena in Optics: Theory and Applications (Roberts & Co., 2007). It has the potential to enable imaging in currently inaccessible scenarios. Our single-shot lensless technique is simple, does not require wavefront-shaping nor time-gated or interferometric detection, and is realized here using a camera-phone. We experimentally demonstrate single-shot imaging through scattering media and around corners using spatially incoherent light and various samples, from white paint to dynamic biological samples. Here, we show that, owing to the ‘memory-effect’ for speckle correlations, a single high-resolution image of the scattered light, captured with a standard camera, encodes sufficient information to image through visually opaque layers and around corners with diffraction-limited resolution. Despite many recent advances, no current method can perform non-invasive imaging in real-time using diffused light. The fundamental problem is that inhomogeneous samples such as biological tissue randomly scatter and diffuse light, preventing the formation of diffraction-limited images. Optical imaging through and inside complex samples is a difficult challenge with important applications in many fields.
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