According to various embodiments, systems and methods for transmitting acoustic waves in a region aided by reflection from environmental objects. An arrangement of acoustically reflective surfaces in an environment of a target can be detected to generate an environmental acoustic propagation channel model. An acoustic radiation pattern for reflecting one or more acoustic waves off of one or more acoustically reflective surfaces in the arrangement of acoustically reflective surfaces towards the target can be identified. A coherent acoustic beamforming device can be controlled to perform coherent beamforming of an acoustic hologram based on the acoustic radiation pattern to generate the one or more acoustic waves for reflection towards the target off of the one or more acoustically reflective surfaces.

There are provided volume holograms and combinations of lenticular lenses and holograms in particular for security applications. In embodiments, a volume hologram comprises a holographic medium (102) including a first optical interference structure which, upon illumination, replays a first image (110); wherein the first image includes a lenticular lens layer (111) including an array of lenticules and a lenticular image layer (113) including first (114) and second (115) interlaced images corresponding with the array of lenticules.

A method for generating at least one hologram includes at least one hologram projection device, at least one storage medium on which at least one previously played field game is at least partially stored, and at least one playback element communication with the storage medium for supplying the hologram projection device with data to be projected. The data include at least one data packet containing data of the previously played field game, and includes data of a location and/or time and/or physical condition of at least one game participant as a function of a playing time during a game. Thus, these data can be reproduced by the hologram projection device in real time, in order to reproduce the field game by the hologram.

An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.

One disclosed example provides a computing device comprising a logic subsystem comprising a processor, and memory storing instructions executable by the logic subsystem. The instructions are executable to display via a display system one or more holographic objects, receive depth image data from a depth image sensor, detect a user input setting a trajectory for a selected holographic object, in response to detecting the user input setting the trajectory for the selected holographic object, determine the trajectory for the selected holographic object set by the user input, determine, based upon the depth image data and the trajectory, a surface intersected by the trajectory of the selected holographic object, and display via the display system the selected holographic object as travelling along the trajectory and changing in form upon encountering the surface.

A projection system that facilitates the use of in-situ detection of a change in wavelength, thereby enabling appropriate compensation or corrections to be applied on the fly to improve the quality of the image in the primary image region. In-situ detection in this manner can allow wavelength changes due to both temperature fluctuations and hardware variations to be compensated for simultaneously, thereby reducing the time and expense for end of line hardware testing, and removing the need to perform in-situ mapping of the wavelength as a function of temperature. In this way, the quality of the image provided to a user can be improved in a simpler, more efficient manner.

A heads up display system with a variable focal plane includes a projection device to generate light representative of at least one virtual graphic, an imaging matrix to project the light representative of the at least one virtual graphic on at least one image plane, a display device to display the at least one virtual graphic on the at least one image plane, and a translation device to dynamically change a position of the imaging matrix relative to the display device based, at least in part, on a predetermined operational parameter to dynamically vary a focal distance between the display device and the at least one image plane.

A computing device and method are provided for transmitting a relevant subset of map data, called a neighborhood, to enable mutual spatial understanding by multiple display devices around a target virtual location to display a shared hologram in the same exact location in the physical environment at the same moment in time. The computing device may comprise a processor, a memory operatively coupled to the processor, and an anchor transfer program stored in the memory and executed by the processor.

A method that includes: recognizing by an object recognition device a physical object; comparing by the object recognition device the physical object with a fully completed object; identifying by the object recognition device a spatial position, an orientation and physical dimensions of the partially-completed physical object; creating by a three-dimensional (3D) modeling program a 3D model of the partially-completed physical object using the spatial position, the orientation and physical dimensions of the partially-completed physical object; inputting by the 3D modeling program to a holographic creation system a missing shape of the partially-completed physical object, the missing shape being a complementary portion of the partially-completed physical object; creating by the holographic creation system a 3D hologram of the complementary portion; displaying by a holographic projector the 3D hologram of the complementary portion adjacent to the partially-completed physical object.

A computing device and method are provided for transmitting a relevant subset of map data, called a neighborhood, to enable mutual spatial understanding by multiple display devices around a target virtual location to display a shared hologram in the same exact location in the physical environment at the same moment in time. The computing device may comprise a processor, a memory operatively coupled to the processor, and an anchor transfer program stored in the memory and executed by the processor.