High-Stable In-Line-and-Off-Axis Hybrid Digital Holography Using High-Resolution Reconstruction Under Spatial and Frequency Constraints.

A high-stable in-line-and-off-axis hybrid digital holography is reported for stable and high-resolution imaging. Employing a reflective conjugate 4 f configuration, our approach acquires focused off-axis and in-line holograms. In this case, the reconstruction is implemented using an iterative algorithm in which the low-resolution phase information about off-axis hologram and the amplitude information about in-line hologram are combined as the initial value. During the iterative process, the iterative constraints are performed in the spatial and frequency domains until the algorithm converges and yields the high-resolution results. After simulation, the reconstruction performance of the approach was demonstrated by reconstructing the amplitude and phase images of standard phase-resolution plate and bee wings.