Patent ID: 9715216
Date: 2017-07-25
CPC Classifications: G03H

Claim:
1. A method of fabricating a stereoscopic hologram of an object, the method comprising: capturing a sequence of two-dimensional images of the object, wherein said capturing comprises either: replaying said captured sequence of images one at a time using coherent light to reproduce said sequence of captured images on a diffusing screen; recording a first volume hologram during said replaying of said captured sequence of images, wherein said recording comprises recording holograms of said captured images on said diffusing screen by recording a hologram of each said replayed image of said captured sequence on said diffusing screen in a different spatial location on a surface of said first volume hologram; replaying said first volume hologram to replay together said images recorded in said different spatial locations on said surface of said first volume hologram, said replayed images forming a stereoscopic image of said object in a replay plane of said first volume hologram; recording a second, volume reflection hologram of said replayed stereoscopic image of said object replayed by said first volume hologram to provide said stereoscopic hologram of said object; and further comprising: providing a contrast-enhancing background image for said second volume reflection hologram, said contrast-enhancing background image being a two-dimensional captured image, derived from said captured sequence of two-dimensional images, which matches said second volume reflection hologram, said contrast-enhancing background image including said fiducial part; wherein said contrast-enhancing background image is a planar photographic printed image printed separately to said second volume reflection hologram, and wherein said second volume reflection hologram overlays said printed image; wherein the second, volume reflection hologram is a white light viewable reflection hologram whose image plane, as defined by the focal plane of a said captured image, coincides with the surface of a film layer of said second, volume reflection hologram; and aligning said fiducial part of said contrast-enhancing background image with said fiducial part in said second volume reflection hologram.