Subsampled scanning holographic imaging (SuSHI) for fast, non-adaptive recording of three-dimensional objects

Optical scanning holography enables the recording of three-dimensional (3D) objects involving scattering or fluorescence emission. However, the time-consuming raster scanning process prevents real-time tracking of dynamic events. We propose a compressed sensing approach to reduce the number of measurements required by scanning only along a low-density spiral trajectory, thus reducing the acquisition time. Through simulation-based performance characterization, we show that the 3D objects can be accurately restored with only 4% of holographic measurements. We also apply spiral scanning to actual holographic systems to show five to twenty-five times speed improvement in the imaging frame rate with high reconstruction fidelity. This approach thus would be critically important for single-pixel holographic recording of dynamic events, including microbead tracking and optical sectioning of 3D scenes.