Holographic viewing device, and computer-generated hologram for the same
The invention relates to a holographic viewing device that enables a given pattern to be properly viewed in place of light sources in a scene and is easy to fabricate and assemble with consistent characteristics, and a computer-generated hologram for the same. The invention provides a holographic viewing device in which computer-generated holograms 2 and 3 each constructed as a transmission Fourier transform hologram is fitted in a frame member 1 . At least one of phase information and amplitude information recorded in a certain predetermined peripheral site of the computer-generated hologram 2, 3 relative to an input pattern reconstructible from the computer-generated hologram is removed.
1. A holographic viewing device comprising:
a frame member and
a computer-generated hologram constructed as a transmission Fourier transform hologram is fitted in a frame member,
the computer-generated hologram further including:
a peripheral site being removed in order to fit said hologram in said frame member.
2. The holographic viewing device according to claim 1 , wherein the computer-generated hologram comprises a phase hologram.
3. The holographic viewing device according to claim 1 , wherein the computer-generated hologram has a phase distribution multivalued to four or more levels.
4. The holographic viewing device according to claim 1 , wherein the computer-generated hologram is in a rectangular matrix form in which a number of minuscule computer-generated hologram elements having identical characteristics are set together in parallel, and any one of pre-determined four corners of the computer-generated hologram does not contain a hologram element.
5. The holographic viewing device according to any one of claims 1 to 4 , wherein input image patterns recorded in computer-generated holograms fitted in right and Left frames of the viewing device have binocular parallax.
6. A computer-generated hologram for a holographic viewing device, which is constructed as a transmission Fourier transform hologram for the holographic viewing device, comprising:
a frame member and
a peripheral site being removed in order to fit said hologram in said frame member.
7. The computer-generated hologram according to claim 6 , wherein the computer-generated hologram comprises a phase hologram.
8. The computer-generated hologram according to claim 7 , wherein a phase distribution is multivalued to four or more levels.
9. The computer-generated hologram according to any one of claims 6 to 8 , wherein the computer-generated hologram is in a rectangular matrix form in which a number of minuscule computer-generated hologram elements having identical characteristics are set together in parallel and one of predetermined four corners of the computer-generated hologram does not contain a hologram element.