Video hologram and device for reconstructing video holograms with small region encoding
AssigneeSeeReal Technologies S.A.
InventorArmin Schwerdtner
Life of this patent
Estimating the term…
Abstract
In a video hologram that enables a three dimensional scene to be reconstructed, a specific region in the hologram encodes information for a particular, single point in the reconstructed scene. This region is the only region in the hologram encoded with information for that point, and is restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position. This contrasts with conventional holograms, in which the information needed to reconstruct a given point is distributed across the entire hologram.
Claims22
A hologram to be encoded into a hologram-bearing medium of a display device, the display device comprising:
- an optical system;
- at least one light source;
- and
- a hologram-bearing medium;
- the optical system imaging the light source into an image plane of the light source;
- the hologram being generated by a computer processor;
- a sequence of holograms forming a video hologram to be displayed by the device to enable video holography;
- the hologram comprising a region with information needed to reconstruct a single point of a three dimensional scene, the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source, the region being:
- (a) encoded with information for that single point in the reconstructed scene;
- (b) the only region in the hologram encoded with information for that point;
- (c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position;
- and
- (d) variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.
A computer adapted to generate a sequence of holograms to be encoded into a hologram-bearing medium of a display device, the display device further including:
- an optical system;
- and
- at least one light source;
- the optical system imaging the light source into an image plane of the light source, each hologram in said sequence comprising a region with information needed to reconstruct a single point of a three dimensional scene, the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source, the region being:
- (a) encoded with information for that single point in the reconstructed scene;
- (b) the only region in the hologram encoded with information for that point;
- (c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position;
- and
- (d) variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.
A display device adapted to generate a holographic reconstruction, the display device including
- an optical system;
- at least one light source;
- and
- a hologram-bearing medium;
- the optical system imaging the light source into an image plane of the light source, the hologram-bearing medium being encoded with a sequence of holograms, each hologram in said sequence comprising a region with information needed to reconstruct a single point of a three dimensional scene, the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source, the region being:
- (a) encoded with information for that single point in the reconstructed scene;
- (b) the only region in the hologram encoded with information for that point;
- (c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position;
- and
- (d) variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.
A method of generating a hologram that reconstructs a single point in a three dimensional scene for encoding the hologram into a hologram-bearing medium of a display device, the display device comprising:
- an optical system;
- at least one light source;
- and
- a hologram-bearing medium;
- the optical system imaging the light source into an image plane of the light source;
- a sequence of holograms forming a video hologram to be displayed by the device to enable video holography;
- the method of generating the hologram by a computer processor comprising the step of:
- (a) encoding into a region of the hologram information for that single point;
- the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source;
- (b) the region being the only region in the hologram encoded with information for that point;
- and
- (c) the region being restricted in size to form a small portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at a defined viewing position;
- and
- (d) the region being variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.
A hologram-bearing medium of a display device, the display device including:
- an optical system;
- at least one light source;
- and
- a hologram-bearing medium;
- the optical system imaging the light source into an image plane of the light source, the hologram-bearing medium being adapted to be encoded with a sequence of holograms, each hologram in said sequence comprising a region with information needed to reconstruct a single point of a three dimensional scene, the point being visible from a defined viewing position of an observer's eye being located approximately at the image plane of the light source, the region being:
- (a) encoded with information for that single point in the reconstructed scene;
- (b) the only region in the hologram encoded with information for that point;
- (c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position;
- and
- (d) variable in position and size, the position and size of the region depending on the location of the point and on the location of the defined viewing position.
Dependencies are inferred from the claim text.