Fast generation of holograms

摘要

Systems, methods, and devices that generate and display a holographic image(s) of a 3-D real or synthetic object scene are presented. A holographic generator component (HGC) partitions a 3-D object scene into a horizontal stack of regularly spaced vertical sub-planes that are each contributed to a respective sub-line. The HGC converts the sequence of sub-lines into a collection of diffraction patterns, which are summed up and interfered with a reference beam to generate the complete hologram, which can be or can approximate a Fresnel hologram. A multi-rate filter is employed to facilitate converting sub-lines to diffraction patterns more quickly. The multi-rate filtering can be realized using convolution in the spatial domain, realized in the frequency domain using a fast Fourier transform, and/or realized in the frequency domain using a graphic processing unit.

主权项

1. A system, comprising:
a hologram generator component (HGC) configured to convert a three-dimensional (3-D) object scene into a sequence of sub-lines and generate a Fresnel hologram representative of the 3-D object scene based at least in part on the sequence of sub-lines, wherein the HGC is further configured to generate a diffraction pattern from scan planes respectively corresponding to sub-lines in the sequence of sub-lines, and wherein the HGC further comprises a multi-rate filter component configured to employ an interpolation filter to interpolate at least one empty gap in the sequence of sub-lines to suppress the at least one empty gap, wherein the at least one empty gap results from an up-sample of the sequence of sub-lines; and at least one display component configured to present the Fresnel hologram.