Using asymmetry patterns of back scattered signals for object detection through scattering media.

What is it about?

The method propagates identical twin beams that are very close to each other to probe through heavily scattering media to search for a hidden object. When the detected region is normal to the beam projection, the back scattered light will be highly symmetric. When the detected region has a tilting angle, the back scattered light will present an asymmetry preference with regard to radii from the beam centers. The asymmetry preference can be extracted and compared with theoretical calculation to find out the actual value of surface tilts. As a result, the surface profile can be reconstructed with a collection of surface tilt samples.

Featured Image

Why is it important?

Contrary to normal uses of Lidars and other method to detect hidden object through scattering media, our method is a relatively low cost system that can be implemented in many underwater UAVs. The method doesn't see as far as a good Lidar system, but can typically extend visibility range by a factor between 3-5.

Perspectives