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US 11,360,429 B2Granted
Reconstructing objects with display zero order light suppression
AssigneePacific Light & Hologram, Inc.
InventorsKamran Qaderi, Stephen John Hart, Robert Alan Hess, Jonathan Seamus Blackley
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Abstract
Methods, apparatus, devices, and systems for reconstructing three-dimensional objects with display zero order light suppression are provided. In one aspect, a method includes illuminating a display with light, a portion of the light illuminating display elements of the display, and modulating the display elements of the display with a hologram corresponding to holographic data to diffract the portion of the light to form a holographic scene corresponding to the holographic data, and to suppress display zero order light in the holographic scene. The display zero order light can include reflected light from the display.
Claims25
A method comprising:
- guiding light to illuminate a display, a first portion of the light illuminating display elements of the display;
- modulating the display elements of the display with a hologram corresponding to holographic data to i) diffract the first portion of the light to form a holographic scene corresponding to the holographic data, and ii) suppress display zero order light in the holographic scene, the display zero order light comprising reflected light from the display, wherein the diffracted first portion of the light forms a reconstruction cone with a viewing angle, and guiding the light to illuminate the display with the light comprises guiding the light to illuminate the display at an incident angle that is larger than a half of the viewing angle;
- and
- configuring the hologram such that the diffracted first portion of the light forms the reconstruction cone that is same as a corresponding reconstruction cone to be formed by the diffracted first portion of the light if the light is normally incident on the display,
- wherein the holographic data comprises a respective phase for each of the display elements, the method further comprises configuring the hologram by adding a corresponding phase to the respective phase for each of the display elements, and the corresponding phases for the display elements are compensated by the incident angle such that the holographic scene corresponds to the respective phases for the display elements, and
- wherein the corresponding phase for each of the display elements is expressed as:
- Ø=2π(x cos θ+y sin θ)/λ,
- where Ø represents the corresponding phase for the display element, λ, represents a wavelength of the light, x and y represent coordinates of the display element in a global 3D coordinate system, and θ represents an angle corresponding to the incident angle.
5 more elements
An optical device comprising:
- an optically diffractive component;
- and
- an optically blocking component,
- wherein the optically diffractive component is configured to diffract light at an incident angle to illuminate a display, with a portion of the light illuminating display elements of the display, and the optically blocking component is configured to block display zero order light in a holographic scene formed by the portion of the light diffracted by the display elements, the display zero order light comprising reflected light from the display,
- wherein the display is configured to be modulated with a hologram corresponding to holographic data to diffract the portion of the light to form the holographic scene,
- wherein the diffracted portion of the light forms a reconstruction cone with a viewing angle, and the light is illuminated on the display at an incident angle that is larger than a half of the viewing angle,
- wherein the hologram is configured such that the diffracted portion of the light forms the reconstruction cone that is same as a corresponding reconstruction cone to be formed by the diffracted portion of the light if the light is normally incident on the display,
- wherein the holographic data comprises a respective phase for each of the display elements, and the hologram is configured by adding a corresponding phase to the respective phase for each of the display elements, and the corresponding phases for the display elements are compensated by the incident angle such that the holographic scene corresponds to the respective phases for the display elements, and
- wherein the corresponding phase for each of the display elements is expressed as:
- Ø=2π(x cos θ+y sin θ)/λ,
- where Ø represents the corresponding phase for the display element, λ represents a wavelength of the light, x and y represent coordinates of the display element in a global 3D coordinate system, and θ represents an angle corresponding to the incident angle.
8 more elements
A system comprising:
- a display comprising display elements separated with gaps on the display;
- and
- an optical device arranged adjacent to the display, the optical device comprising:
- an optically diffractive component;
- and
- an optically blocking component,
- wherein the optically diffractive component is configured to diffract light at an incident angle to illuminate a display, with a portion of the light illuminating display elements of the display, and the optically blocking component is configured to block display zero order light in a holographic scene formed by the portion of the light diffracted by the display elements, the display zero order light comprising reflected light from the display,
- wherein the display is configured to be modulated with a hologram corresponding to holographic data to diffract the portion of the light to form the holographic scene,
- wherein the diffracted portion of the light forms a reconstruction cone with a viewing angle, and the light is illuminated on the display at an incident angle that is larger than a half of the viewing angle,
- wherein the hologram is configured such that the diffracted portion of the light forms the reconstruction cone that is same as a corresponding reconstruction cone to be formed by the diffracted portion of the light if the light is normally incident on the display,
- wherein the holographic data comprises a respective phase for each of the display elements, and the hologram is configured by adding a corresponding phase to the respective phase for each of the display elements, and the corresponding phases for the display elements are compensated by the incident angle such that the holographic scene corresponds to the respective phases for the display elements, and
- wherein the corresponding phase for each of the display elements is expressed as:
- Ø=2π(x cos θ+y sin θ)/λ,
- where Ø represents the corresponding phase for the display element, λ represents a wavelength of the light, x and y represent coordinates of the display element in a global 3D coordinate system, and θ represents an angle corresponding to the incident angle.
11 more elements
A method of fabricating an optical device, the method comprising:
- forming an optically diffractive component on a first side of a substrate;
- and
- forming an optically blocking component on a second side of the substrate opposite to the first side,
- wherein the optically diffractive component is configured to diffract light at an incident angle to illuminate a display, with a portion of the light illuminating display elements of the display, and the optically blocking component is configured to block display zero order light in a holographic scene formed by the portion of the light diffracted by the display elements, the display zero order light comprising reflected light from the display,
- wherein the display is configured to be modulated with a hologram corresponding to holographic data to diffract the portion of the light to form the holographic scene,
- wherein the diffracted portion of the light forms a reconstruction cone with a viewing angle, and the light is illuminated on the display at an incident angle that is larger than a half of the viewing angle,
- wherein the hologram is configured such that the diffracted portion of the light forms the reconstruction cone that is same as a corresponding reconstruction cone to be formed by the diffracted portion of the light if the light is normally incident on the display,
- wherein the holographic data comprises a respective phase for each of the display elements, and the hologram is configured by adding a corresponding phase to the respective phase for each of the display elements, and the corresponding phases for the display elements are compensated by the incident angle such that the holographic scene corresponds to the respective phases for the display elements, and
- wherein the corresponding phase for each of the display elements is expressed as:
- Ø=2π(x cos θ+y sin θ)/λ,
- where Ø represents the corresponding phase for the display element, λ represents a wavelength of the light, x and y represent coordinates of the display element in a global 3D coordinate system, and θ represents an angle corresponding to the incident angle.
8 more elements
Dependencies are inferred from the claim text.