Abstract:
Scattering imaging has attracted widespread attention because of its ability to clearly image through scattering media such as biological tissue. In recent years, scattering imaging based on speckle autocorrelation has developed rapidly because of its noncontact nature, lack of prior information and single-frame imaging characteristics. However, speckle autocorrelation imaging is limited by the optical memory effect (OME). When the distance between multiple targets is beyond the range of OME, the autocorrelation information of different targets is aliasing in the correlation domain, resulting in a sharp drop in image quality. Based on the basic principles of the optical memory effect and speckle correlation imaging, firstly, we introduce the imaging techniques related to speckle autocorrelation and speckle correlation. Then, the main technologies and related applications of expanding the OME range are shown. Finally, we summarize the current problems of wide-field imaging technology based on speckle correlation and make suggestions for future developments and applications.
下载:
