The principles of nonlinear optics

The single-shot coherent power-spectrum imaging method has the potential to improve the algorithm speed for obtaining images of objects hidden by opaque scattering media under coherent illumination. In order to extend the single-shot coherent power-spectrum imaging method for real-time imaging of hidden objects with complex structures and large non-sparsity, we propose an optimized method. By applying strengthened Fourier-domain constraints with nonlinear modulus and corresponding necessary optimized algorithm to the method, the experimental results demonstrate that, with only one piece of power-spectrum pattern obtained by a camera separated by scattering media from the object with complex structures, our imaging method can quickly reconstruct the clear object image with low error rate. Furthermore, the success rate and the resuming time of the image reconstruction process for complex objects hidden by scattering media had been much improved, which make the method prospective for wide application range of real-time coherent scattering imaging of practical objects.