Rapid hologram generation through backward ray tracing and adaptive-resolution wavefront recording plane

Abstract

An advanced method for rapidly computing holograms of large 3D objects combines backward ray tracing with adaptive resolution Wavefront Recording Plane (WRP) and adaptive angular spectrum propagation. In the initial phase, a WRP with adjustable resolution and sampling interval based on the object's size is defined to capture detailed information from large 3D objects. The second phase employs an adaptive angular spectrum method (ASM) to efficiently compute the propagation from the large-sized WRP to the small-sized CGH. The computation process is accelerated using CUDA and OptiX. Optical experiments confirm that the algorithm can generate high-quality holograms with shadow and occlusion effects at a resolution of 1024×1024 in 29 ms.