Computer Generated Holography: Techniques, Applications, and Future Directions

Computer-generated holography (CGH) is the technique for recording interference patterns and reconstructing images. This chapter discusses the fundamental principle of generating holograms through computational and mathematical algorithms. Moreover, we explore the diverse applications of CGH, particularly in display technology such as spatial light modulators and the manipulation of laser beams. Within this study, we conduct numerical simulations and mathematical models to create binary holograms for phase and amplitude modulation of incident beams. Additionally, we derive mathematical concepts for generating fork gratings to produce helical beams. Furthermore, we investigate the conversion of Gaussian profiles into nearly uniform flat-top beams using apodizing filters. We also employ CGH concepts for wavefront sensing to measure aberrations in the incident beams. The proof of principle is demonstrated through simulation and experimental validation.