Practical Electron Microscopy and Database

Based on developments in holography theory and computational techniques, significant progress has been made in overcoming the twin image problem inherent in traditional in-line holography. One of the key solutions to this issue was the development of off-axis holography, which allowed the spatial separation of the object and its mirror image by introducing an angular difference between the reference and object beams. This innovation marked a turning point, as it enabled more accurate reconstruction of holograms. Furthermore, as computation and digital sensors evolved, both the recording (writing) and reconstruction (reading) of holograms shifted from purely optical methods to digital approaches. This transition has facilitated greater precision and flexibility, enabling advanced algorithms to enhance the quality and interpretation of holographic images, a shift that has expanded the scope and application of holography beyond its initial optical confines.