In this talk, I will introduce the concept of synthetic wavelength imaging, a computational imaging technique that enables robust phase retrieval even in the presence of strong phase scrambling caused by environmental fluctuations or by scattering media. By combining the complex optical fields captured at two closely spaced wavelengths, we synthesize a field at a much longer beat or synthetic wavelength. This synthetic field effectively encodes the holographic information of the scene while exhibiting significantly reduced sensitivity to phase perturbations at optical scales, effectively rendering them negligible. I will discuss the fundamental principles, trade-offs, and practical considerations of this approach, and share applications currently being explored in the Computational 3DIM Lab, including 3D imaging, remote sensing and biomedical endoscopy.
Balaji et al. (Wed,) studied this question.