Looking around an opaque surface and through a diffused media: a holographic approach

Retrieving the information about the object which is hidden around a corner or obscured by a diffused surface has a vast range of applications. Over the time many techniques have been tried to make this goal realizable. Here, we are presenting methods to retrieve the object from the scattered light using digital holography and ensemble averaging. The methods are fast as no phase correction, complicated image processing, scanning of the object or some kind of wave shaping is required. The method is very realistic and can be used for any kind of object or complicated structure. Though our holographic techniques based approach is functionally more restrictive in the sense that it requires a reference beam for holographic recording, but the system is much simpler and requires no special equipment such as a femtosecond laser, a high-speed streak camera and SLM.