A holographic 3D display system is described that (1) always presents true-colored and true-orthoscopic 3D images regardless of whether the object is thin or thick, or the image is virtual or real and (2) accomplishes an effective data/signal compression apparatus that accommodates to both off-the-shelf detector and display arrays, of both amicable gross array dimensions and palpable individual pixel sizes. It provides a rectilinear-transforming digital holography (RTDH) system for recording and displaying virtual, real, or both virtual and real, orthoscopic three-dimensional images, the system comprising: (a) a focal-plane compression-domain digital holographic recording/data capturing (FPCD-DHR) sub-system; (b) a 3D distribution network for receiving, storage, processing and transmitting the digital-holographic complex wavefront data signals generated by the digital complex wavefront decoder (DCWD) to at least one location; and (c) a focal-plane compression-domain digital holographic display (FPCD-DHD) sub-system located at the at least one location.

The present invention relates to a large-size bionic holographic three-dimensional dynamic display method with large field of view. The method includes: a computer generated hologram (CGH) is loaded on a spatial light modulator; a large field angle is formed by changing the optical path through a microlens array or a diffractive optical element having same optical property with the microlens array disposed on a light-emitting surface of pixel structure of the spatial light modulator. Each microlens of the microlens array has one-to-one correspondence with each pixel of the pixel structure of the spatial light modulator. The cost is saved and design of the system structure is simplified while field view of the three-dimensional holographic display is expanded and large size is reappeared. The pixels in the spatial light modulator are fully utilized to avoid loss of resolution, and the display precision is provided to meet the growing demand of people.

A hologram-based character recognition method in which representative characters are respectively matched to fingers and a group of characters including character objects is matched to representative characters, includes: displaying, when a first movement of a predetermined finger is detected, in a space a hologram image in which a predetermined representative character among the representative characters matched to the predetermined finger is arranged at a center and the character objects included in the group matched to the predetermined representative character are arranged around the predetermined representative character. The method further includes: recognizing the predetermined representative character as an input when a second movement of the predetermined finger is detected; and recognizing one of the one or more character objects as an input when the second movement of the predetermined finger is detected after the predetermined finger is dragged or moved to said one of the one or more character objects.

A holographic display method includes calculating a hologram, displaying it on a spatial light modulator (SLM) and illuminating it with coherent light. The hologram includes hologram pixels each having a hologram pixel value. The hologram is calculated using steps including: performing the inverse Fourier transform of the product of an object field and a negative quadratic phase exponential representative of positive optical power; and restricting each calculated hologram pixel value to one of a plurality (greater than two) of allowable pixel values to form a constrained hologram, which is displayed on the SLM. Each light-modulating pixel of the SLM is operable in a plurality of light-modulation levels corresponding to the plurality of allowable pixel values. The SLM is illuminated with coherent light to form a replay field including conjugate images: a real holographic reconstruction and a virtual holographic reconstruction having greater intensity than that of the real holographic reconstruction.

Aspects of the present invention provide an approach for authentication of a user of a computer system by displaying holographic objects in a bounded field of view of a user, identifying movement of the user interacting with the holographic objects, comparing the interacting movement to authentication information linking user authentication to a movement defined within confidence limits, and when the identified user movement indicates the user interacted with the displayed holographic objects within the defined confidence limits, authenticating the user on the computer system.

A holographic reconstruction of scenes includes a light modulator, an imaging system with at least two imaging means and an illumination device with sufficient coherent light for illumination of hologram coded in the light modulator. The at least two imaging means are arranged such that a first imaging means is provided for the magnified imaging of the light modulator on a second imaging means. The second imaging means is provided for imaging of a plane of a spatial frequency spectrum of the light modulator in a viewing plane at least one viewing window. The viewing window corresponds to a diffraction order of the spatial frequency spectrum.

A light filed (LF) display system for displaying holographic content to viewers in an amusement park (e.g., as part of an amusement park ride). The LF display system in an amusement park includes LF display modules tiled together to form an array of LF modules. In some embodiments, the LF display system includes a tracking system and/or a viewer profiling module. The tracking system and viewer profiling module can monitor and store characteristics of viewers on the amusement park ride, a viewer profile describing a viewer, and/or responses of viewers to the holographic content during the amusement park ride. The holographic content created for display on an amusement park ride can be based on any of the monitored or stored information.

Energy relays may be formed to have various surface profiles. Methods and devices are disclosed for forming energy relays with energy propagation paths configured to account for various energy relay surface profiles so that the energy relays can direct energy through the surfaces of the energy relays with the desired angular profiles and angular extent.

Presenting a three-dimensional (3D) holographic visual and haptic warning is provided. An indication that a first individual who needs supervision is approaching a situation is received. A three-dimensional (3D) holographic visual and haptic warning is presented to the first individual who needs supervision prior to the first individual reaching the situation.

Presenting a haptic hologram warning is provided. An indication that a first individual who needs supervision is approaching a situation is received. A haptic hologram is presented to the first individual who needs supervision prior to the first individual reaching the situation.