Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, a system includes a display having a plurality of display elements and an optical device configured to diffract a plurality of different colors of light to the display. The optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors.

A spatial light modulator includes a semiconductor substrate and a plurality of micro-mirrors arranged on the semiconductor substrate to modulate light. Each of the micro-mirrors has a center and a perimeter. Each of the micro-mirrors includes a layer of a reflective material arranged on the semiconductor substrate. In in each of the micro-mirrors, the layer of the reflective material extends horizontally from the center towards the perimeter for a predetermined distance and slopes downwards towards the semiconductor substrate after the predetermined distance.

A system or method for augmenting a lightfield image can include receiving a plurality of images of a subject, overlaying augmentation content on the images, optionally obscuring portions of the augmentation content based on the perspective of the image and the subject, and displaying the aligned images and the augmentation content at a holographic display.

A digital hologram is represented by a set of coefficients respectively associated with a plurality of definition wavelets each defined by a tuple of coordinates in a multidimensional space. A method for reconstructing the digital hologram in order to display it by a display, includes the following steps: depending on at least one data item representative of a characteristic of the display, determining a transformation of the multidimensional space; and generating a reconstructed hologram by assigning each coefficient of at least some of the coefficients to a reconstruction wavelet defined by an image reconstruction tuple by the predetermined transformation of the tuple of coordinates defining the definition wavelet associate with the coefficient in question. An associated display method, reconstruction device and system are also described.

Disclosed is a method of generating a volume hologram using a point cloud and a mesh, in which a weight is given to a brightness of a light source according to a direction of a light in order to record a hologram of better quality. The method includes: (a) acquiring multi-view depth and color images; (b) generating point cloud data of a three-dimensional object from the acquired multi-view depth and color images; (c) generating mesh data of the three-dimensional object from the point cloud data of the three-dimensional object; (d) calculating a normal vector of each mesh from the mesh data of the three-dimensional object; (e) extracting three-dimensional data at a user viewpoint from the mesh data of the three-dimensional object by using the normal vector of the mesh; and (f) generating hologram data from three-dimensional data at the user viewpoint.

A system and/or method can be operable to receive a plurality of views of one or more scenes (e.g., from different perspectives) and generate a lightfield image and/or lightfield video from the plurality of views. The generated lightfield image and/or lightfield video can be encoded, transmitted, and/or decoded, for instance to facilitate sharing of the lightfield image and/or light field video.

Disclosed are high-density energy directing devices and systems thereof for two-dimensional, stereoscopic, light field and holographic head-mounted displays. In general, the head-mounted display system includes one or more energy devices and one or more energy relay elements, each energy relay element having a first surface and a second surface. The first surface is disposed in energy propagation paths of the one or more energy devices and the second surface of each of the one or more energy relay elements is arranged to form a singular seamless energy surface. A separation between edges of any two adjacent second surfaces is less than a minimum perceptible contour as defined by the visual acuity of a human eye having better than 20/40 vision at a distance from the singular seamless energy surface, the distance being greater than the lesser of: half of a height of the singular seamless energy surface, or half of a width of the singular seamless energy surface.

A system for generating holographic images or videos comprising a camera array, a plurality of processors, and a central computing system. A method for generating holographic images can include receiving a set of images and processing the images.

A beam deflector includes a first electrode layer including a plurality of line electrodes extending in a first direction and arranged parallel to each other in a second direction crossing the first direction; a second electrode layer separated from the first electrode layer by a predetermined distance to face the first electrode layer; and a deflection layer between the first electrode layer and the second electrode layer and having a plurality of optically anisotropic molecules controlled by an electric field formed between the first electrode layer and the second electrode layer. Each of the optically anisotropic molecules has an ellipse shape having a major axis and a minor axis, wherein the major axis is arranged to head for the first direction.

A system or device includes a member structure, a plurality of flexible members, and a plurality of tips disposed at ends of the flexible members. The member structure includes an ultrasonic emitter configured to emit an ultrasonic imaging signal. The plurality of flexible members are coupled to the member structure. The plurality of tips are disposed at ends of the flexible members. At least one tip of the plurality of tips includes an image sensor configured to receive an infrared exit signal.