Reconstructing objects with display zero order light suppression

An optical device comprising:

• an optically diffractive component;
• and
• an optically redirecting component,
• wherein the optically diffractive component is configured to diffract light at an incident angle onto a display comprising a plurality of display elements spaced with gaps on the display, the light comprises a plurality of different colors of light, the display is configured to diffract a portion of the light illuminating the display elements, and the optically redirecting component is configured to transmit the portion of the light to form a holographic scene and to redirect display zero order light away from the holographic scene in a three-dimensional (3D) space, the display zero order light comprising reflected light from the display, and
• wherein the optical device is configured such that the display zero order light is incident on the optically redirecting component at a redirecting incident angle larger than that of the diffracted portion of the light, and the optically redirecting component is configured to diffract the display zero order light through the optically redirecting component with a substantially larger diffraction efficiency than the diffracted portion of the light.

A system comprising:

• a display comprising display elements separated with gaps on the display;
• and
• an optical device comprising:
• an optically diffractive component;
• and
• an optically redirecting component,
• wherein the optically diffractive component is configured to diffract light at an incident angle onto a display comprising a plurality of display elements spaced with gaps on the display, and wherein the light comprises a plurality of different colors of light,
• wherein the display is configured to diffract a portion of the light illuminating the display elements,
• wherein the optically redirecting component is configured to transmit the portion of the light to form a holographic scene and to redirect display zero order light away from the holographic scene in a three-dimensional (3D) space, the display zero order light comprising reflected light from the display,
• wherein the optical device is configured such that the display zero order light is incident on the optically redirecting component at a redirecting incident angle larger than that of the diffracted portion of the light, and the optically redirecting component is configured to diffract the display zero order light through the optically redirecting component with a substantially larger diffraction efficiency than the diffracted portion of the light, and
• wherein the optical redirecting component is configured to diffract display zero order light of the plurality of different colors of light reflected by the display at different diffraction angles towards different directions in the 3D space, the display zero order light comprising reflected light of the plurality of different colors of light by the display.