An integrated optical circuit for holographic information processing is disclosed. The optical circuit comprises a photorefractive medium and two transmitter arrays. The transmitter arrays are adapted for locally changing the refractive index of the photorefractive medium for holographic encoding of the information in a working plane of the photorefractive medium by transmitting light via optical paths into the photorefractive medium such that an interference pattern is generated in the working plane. The optical paths and the working plane are arranged in a single optical plane.

An ultrasonic apparatus (100) for creating a holographic ultrasound field (1) comprises an ultrasound source device (10) being adapted for creating an ultrasound wave, and a transmission hologram device (20) having a transmission hologram (21) and an exposed acoustic emitter surface (22), said transmission hologram device (20) being acoustically coupled with the ultrasound source device (10) and being arranged for transmitting the ultrasound wave through the acoustic emitter surface (22) and creating the holographic ultrasound field in a surrounding space, wherein the acoustic emitter surface (22) is a smooth surface which do not influence the field distribution of the ultrasound wave. Furthermore, a method of creating a holographic ultrasound field in an object (3), wherein the ultrasonic apparatus (100) is used, and applications of the ultrasonic apparatus (100) are described.

A device for mixed reality includes a base, a curved mirror, a first holder, and a second holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed on the base, disposed in front of the concave surface and within a focal length of the curved mirror, and configured to support a portable apparatus to be oriented at an angle. The second holder is disposed on the base and supports the curved mirror to face the portable apparatus.

A device for mixed reality includes a curved mirror and a first holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed in front of the concave surface and within a focal length of the curved mirror and configured to support a portable apparatus. The first holder has a curved surface configured to reflect a sound wave from the portable apparatus to the curved mirror.

A mixed reality assembly includes a curved mirror, a display apparatus, a motion detection module, and a display control module. The display apparatus is within a focal length of the curved mirror and has a display surface facing the curved mirror. The motion detection module is configured to detect a motion of a real object. The display control module is configured to control a display image on the display surface in response to the detected motion of the real object.

A method for displaying a hologram to a variable direction including using circuitry to determine a direction from a holographic projector to a viewer for projecting a hologram to a viewer, and projecting a hologram in the determined direction, in which the projecting the hologram includes reflecting from a same mirror as the determining the direction of the viewer, and the circuitry controls the projecting the hologram to a direction corrected for a difference in direction between a projecting unit and a tracking unit relative to the mirror. Related apparatus and methods are also described.

A head-mounted display device comprises a rendering engine configured to generate a hologram representative of a three-dimensional object. The hologram includes depth information that causes the three-dimensional object to be rendered with a focus that is determined by the depth information. The device also includes a spatial light modulator that modulates light from a light source as indicated by the hologram. A switchable hologram comprises multiple stacked switchable gratings. Each of the stacked switchable gratings is associated with one or more resulting exit pupil locations on a viewing surface. The system also comprises an eye tracker configured to map a viewing direction of a user's eye to a viewing location on the viewing surface. A processor is configured to activate a particular switchable grating within the switchable transmission hologram that is associated with an exit pupil location that aligns with the viewing location.

Disclosed are a mobile terminal having a hologram output unit and a method for controlling the same. The mobile terminal, comprises: a hologram output unit configured to output a hologram object to an output space outside the mobile terminal; an image sensor configured to sense a portion of a human body located within the output space of the hologram object; a feedback output unit configured to output a feedback signal; and a controller configured to: determine a relative position between the hologram object output by the hologram output unit and the portion of the human body sensed by the image sensor; detect, based on the relative position between the hologram object and the portion of the human body, that the portion of the human body approaches the hologram object, and control, based on the detection that the portion of the human body approaches the hologram object, the feedback output unit to transmit the feedback signal towards the portion of the human body that is detected to approach the hologram object.

A method is disclosed that includes receiving an instruction to generate a virtual place-located anchor at a virtual location that is world-locked. Data items from a target data source are received. A subset of the data items is linked to the virtual place-located anchor. A first display device is caused to display virtual content of the subset of data items at the virtual place-located anchor. If a condition under which a second user is authorized to view the virtual content is satisfied, a second display device is caused to display the virtual content at the virtual place-located anchor.

A holographic display image projector system including an input light source for generating an at least partially coherent optical input beam and an imaging system for transforming an image representation in the Fourier domain into a corresponding holographic image in the spatial domain. The image projector includes a spatial light modulator having a reflective phase manipulating surface and being responsive to an electric control signal to generate a two-dimensional phase profile on the reflective phase manipulation surface to diffract the optical input beam into a diffracted beam having a plurality of diffraction components angularly separated in a first dimension. A coupling prism having a first surface positioned such that a first subset of the diffraction components is refracted through the first surface to the imaging system, wherein upon refraction, an angular separation of the first subset of diffraction components is increased by at least a factor of 2.