Research On Self Modulation Ghost Imaging Based On Dynamic Scattering Medium

Ghost imaging was realized by calculating the coincidence between the intensity of light passing through an object and the measurement matrix of a reference light path to obtain the image information of the object.Usually,the complex and varied environments interfere with the light signal,thereby affecting image quality.However,the special imaging way of ghost imaging can reduce the interference of environmental noise and achieve clear imaging in extreme environments.Ghost imaging plays an important role in such fields as military,medical,and marine exploration.We firstly introduced the principle of ghost imaging and described its imaging model.Secondly,the feasibility of ghost imaging was verified by theoretical simulation of the waveform of light passing through the object,which generated by simulation and the waveform of reference light were analyzed.Then by changing the imaging parameters such as the amount of collected data and the size of the light source to obtain simulation results of image reconstruction.In the experiment,a pseudo-thermal ghost imaging experimental device was generated laser light source was modulated by slowly rotating frosted glass to create a pseudothermal light source with random fluctuations in intensity,which formed an experimental system of lensless pseudo-thermal ghost-imaging;then compared the qualities of reconstructed images under different imaging conditions.Then a self modulated ghost imaging(SMGI)method based on dynamic scattering media was proposed,which directly uses dynamic random speckles formed by the interaction between free particles that undergo Brownian motion in the medium and the light source as the reference light.Through examining this self modulated light source by simulating ghost imaging,then confirming this method is feasible and superior by optical experiments and ghost imaging algorithm.Then,target extraction is carried out for the reconstruction results,and image evaluation indexes are calculated.The data obtained are better than those of ghost imaging system using Frosted glass.It is found that this new method of SMGI can better obtain the image information of an object to be imaged and simplify ghost imaging system to its better application and also suitable for imaging in environments with high scattering media such as dense fog and mixed pursuit underwater..