Analytical Method for Computing Video Holograms in Real Time

Analytic method for computing a video hologram of a scene which comprises a multitude of object points for use in a holographic display device with at least one light modulator means,

• Where a visibility region (VR) is defined within a periodicity interval of the reconstruction of the video hologram,
• Where then a modulator region (MR) is defined by the defined visibility region together with each object point of the scene to be reconstructed, where a sub-hologram of the object point to be reconstructed is computed in each modulator region, and where the total hologram is created by superposition of sub-holograms,
• Where the complex hologram values of a sub-hologram are determined in a modulator region of the light modulator means from the wave front of the object point to be reconstructed, in that the transmittance functions or modulation functions of a projection element, which is modelled in the modulator region (MR), which comprises at least one modelled prism (P), and in whose focal point the object point (OP) to be reconstructed lies, are computed and analysed, where the sub-hologram (SH) of those object points are computed using the mentioned functions.