Analytic method for computing video holograms in real time

摘要

An analytical method for computing a video hologram for a holographic reproduction device having at least one light modulation means is disclosed, wherein a scene split into object points is encoded as a whole hologram and can be seen as a reconstruction from a visibility region, located within a periodicity interval of the reconstruction. The visibility region, together with each object point of the scene to be reconstructed, defines a subhologram and the whole hologram is generated from a superposition of subholograms, wherein the complex hologram values of a subhologram are determined from the wave front of the respective object point to be reconstructed in a modulator region of the light modulation means, by calculating and evaluating the transmission or modulation functions of an imaging element formed in the modulator region. The object point to be reconstructed is located in the focal point of the imaging element.

主权项

1. A method for computing a video hologram of a scene to be reconstructed, the scene to be reconstructed comprising a multitude of object points, for use in a holographic display device with at least one light modulator means, the method comprising the steps of:
defining a visibility region within a periodicity interval of the video hologram of the scene to be reconstructed; for each object point, defining a modulator region by the defined visibility region together with each object point of the scene to be reconstructed, where a sub-hologram of an object point of the scene to be reconstructed is computed for each modulator region, and where an entire video hologram is created by superposition of said sub-holograms; determining complex hologram values of a sub-hologram in a modulator region from a wave front of an object point to be reconstructed by computing modulation functions of an imaging element which is modeled in a respective modulator region of said holographic display device, and which includes a focal point in which the object point to be reconstructed lies, where the sub-hologram of said object point is computed using the modulation functions.