609 results about "Holographic imaging" patented technology

Apparatus, system, and method for enabling eye-to-eye contact in video conferences. In general, the system and apparatus employ means for generating video images corresponding to real images that would be produced if a video camera were disposed at or behind a video display having a field of view directed toward a target object such as a participant. An image (either real, reflected, or holographic) is formed based on light reflected off of the target object, and object light corresponding to the image is received by the video camera, which produces a video signal containing the image. Typically, the means for generating the video images employs direct imaging, reflective imaging, or holographic imaging. The means for generating the video images are also configured in such a manner as to be substantially transparent to video conference participants viewing the display images on the video display. A similar configuration is deployed at two or more conference rooms, thereby enabling participants to communicate with one another using eye-to-eye contact.

An experiential digitalized multi-screen seamless cross-media interactive opening teaching laboratory is integrated in testing, researching and analyzing. Experiment and data analysis are performed in a real teaching environment; under support of the multi-screen interactive technology, the laboratory comprises a laboratory functional partition, an operation support system, a data working system, an experiment information acquisition system and an audio and video input and output device; a screen jilting function among multiple mobile terminals is realized; the data working system comprises a server, a database, education resource cloud, a U-teaching system, a learning analysis and evaluation system, a mobile device, a cross-screen management module, a recording and broadcasting system and an Internet; learning space for cross-media interactive learning is provided, technologies of holographic imaging, multi-screen interaction, learning analysis and the like are integrated, and seamless fusion of the physical space and the virtual space is realized; seamless fusion of supporting technologies from formal learning to informal learning, multiple learning modes, cross-terminal, cross-media and the like is realized, and good learning experience is provided for learners.

A method of imaging an object, such as a diseased human heart or bone, in a nontransparent medium, such as the human body, involves placing an array of transmitters and receivers in operational association with the medium. The transmitters generate a harmonic (frequency domain) or pulse (time domain) primary electromagnetic field (EM) which propagates through the medium. The primary field interacts with the object to produce a scattered field, which is recorded by the receivers. The scattered EM field components measured by the receivers are applied as an artificial EM field to generate a backscattering EM field. Cross power spectra of the primary and backscattering fields (in the frequency domain) or cross correlation between these fields (in the time domain) produce a numerical reconstruction of an EM hologram. The desired properties of the medium, such as conductivity or dielectric permittivity, are then derived from this hologram.

The present invention seeks to introduce a new delivery system, interactive platform and controller compliment for an allied touchscreen media; with said media particularly comprising repository-sourced mobile game applications configured for native operation. Mapping systems are dynamic and include an interface for user manipulation of immersive, 3-D holographic imaging modalities to advance input in a video-game environment. A series of specialty-input controllers for interaction with said touchscreen media are also advanced by the inventor; including those designed for remote and mappable manipulation of an actionable sensor input where salient to the input dynamics of an engaged gaming title. A user worn artificial muscle interface that reacts to game events are also advanced by the inventor.

The invention discloses a human body security inspection system used for millimeter wave active three-dimensional holographic imaging. The system comprises a cylindrical main body frame provided with an outlet and an inlet, a first millimeter wave transceiver and a second millimeter wave transceiver as well as a first millimeter wave switch antenna array and a second millimeter wave switch antenna array which are correspondingly connected; a rotary scanning and driving device is used for driving the first millimeter wave switch antenna array and the second millimeter wave switch antenna array to rotate oppositely; a control device is used for controlling the rotary scanning and driving device as well as the first millimeter wave transceiver and the second millimeter wave transceiver to cause the first millimeter wave transceiver and the second millimeter wave transceiver to respectively carry out parallel cylindrical rotating scanning on area to be scanned in a first scanning area and a second scanning area; and a parallel image processing device is used for synthesizing a three-dimensional holographic image of personnel to be inspected according to acquisition data of the first millimeter wave transceiver and the second millimeter wave transceiver and spatial position information of the acquisition data. By adopting the human body security inspection system used for millimeter wave active three-dimensional holographic imaging, disclosed by the invention, detecting velocity on the personnel to be inspected is improved.

A method of producing a holographic screen for reconstruction of uniformly magnified three-dimensional images from projected integral photographs. The screen is produced as an array of holographic imaging elements whose center distances and focal lengths have been scaled-up uniformly by the magnification factor. In the preferred embodiment, when illuminated with a white light reference beam, the screen reconstructs a linear array comprising an alternating series of red, green, and blue vertical lines. However, when an enlarged integral photograph representative of a three-dimensional scene is correctly projected onto the screen, a uniformly magnified three-dimensional image of that scene is reconstructed. The screen may be manufactured as rectangular tiles that are assembled to form the entire screen.

A device (1) for sorting objects immersed in a flowing medium is described. The device comprises a holographic imaging unit comprising a plurality of holographic imaging elements (2), a fluid handling unit comprising a plurality of microfluidic channels (3) for conducting flowing medium along a corresponding holographic imaging element (2) and comprising a microfluidic switch (5) arranged downstream of an imaging region in the microfluidic channel for controllably directing each object in the flowing medium into a selected one of a plurality of outlets (6). The device also comprises a processing unit (7) adapted for real-time characterization of the holographic diffraction image obtained for each of the objects thereby taking into account at least one predetermined object type signature. The processing unit (7) furthermore is adapted for controlling the microfluidic switch (5) in response to the characterization.

The invention discloses a scanning method for a millimeter-wave active three-dimensional holographic-imaging human body security check system. The scanning method comprises the following steps: a rotary scanning and driving device is controlled by a control device to drive a first millimeter-wave switch antenna array and a second millimeter-wave switch antenna array to respectively rotate in parallel in opposite directions in a first scanning zone and a second scanning zone so as to carry out cylindrical rotating scanning to a zone to be scanned; and a parallel image processing device synthesizes the three-dimensional holographic image of a person to be detected according to the collected data from a first millimeter-wave transceiver and a second millimeter-wave transceiver and the spatial position information of the collected data.

The present invention discloses a scanning method combing a human body security check system with frequency division and space division to avoid opposite radiation interference. During scanning, the operating frequency of a detection signal provided by a first millimeter wave transceiver is different with that of a detection signal provided by a second millimeter wave transceiver at the same moment; and in addition, during scanning, the detection altitude of an antenna unit in a first millimeter wave switching antenna array is different with that of an antenna unit in a second first millimeter wave switching antenna array at any moment. The method avoids the opposite radiation interference in switching antenna arrays on both sides of a millimeter wave active three-dimensional holographic imaging human body security check system, so as to improve the level of imaging definition.

The present invention relates to a three-dimensional (3D) hologram display system. The 3D hologram display system includes a projector device for projecting an image upon a display medium to form a 3D hologram. The 3D hologram is formed such that a viewer can view the holographic image from multiple angles up to 360 degrees. Multiple display media are described, namely a spinning diffusive screen, a circular diffuser screen, and an aerogel. The spinning diffusive screen utilizes spatial light modulators to control the image such that the 3D image is displayed on the rotating screen in a time-multiplexing manner. The circular diffuser screen includes multiple, simultaneously-operated projectors to project the image onto the circular diffuser screen from a plurality of locations, thereby forming the 3D image. The aerogel can use the projection device described as applicable to either the spinning diffusive screen or the circular diffuser screen.

The invention discloses a fault detecting device of near field acoustic holography sound image mode identification and a detecting method thereof in the field of industrial detection. The device comprises a microphone array, a scanner frame, a reference source, a clamped rib plate, an excitation source and a data acquiring system. The invention adopts sound pressure amplitude and distribution changes under mechanical normal and fault states, borrows ideas from applications of an image diagnosis technology in other fields and utilizes image processing, feature extracting and mode identifying technologies to process a near field acoustic holography image. Experiments show that the method is effective, vibration source positioning and identifying functions coordinated with the holographic imaging technology is proven, the image feather extracting and mode identifying technologies are combined with the acoustic imaging technology, thus broadening the application range of the acoustic imaging technology and bringing a set of effective acoustic fault diagnosis technologies and feasibility of being widely used in engineering thereof.

A methods and apparatus for the detection and exploration of buried objects and hydrocarbons uses two separate signals having different frequency characteristics combined to enable interferometric analysis and imaging systems including radar, sonar, seismological, and general acoustical systems. The measurement and analysis of absorption and other elastic moduli are derived from a three-dimensional display of interferometric information. Interferometric holography also employs the unique characteristic record of frequency, phase, and amplitude of more than one signal.

The invention relates to the technical field of architectural design and construction, in particular to a BIM-based holographic imaging full-decoration simulation display method and display system. A three-dimensional information model of a building and an internal partition wall parameter family are built by BIM modeling software; interior structures are designed by adjusting partition wall family parameters and the partition wall position; and the diversity of the interior structures and individualized design of decorating schemes are achieved. The effect of selection and modification by residents can be displayed by a three-dimensional real image projected through a holographic imaging technology; a user can intuitively experience the difference of the decorating schemes; and through rendering animation, the user can carry out live-action experience on each detail of the decorating scheme in the projected three-dimensional animation scene, and can intuitively determine the decorating schemes without visiting model houses. Auxiliary acceptance is carried out through a three-dimensional scheme map and an animated image; and the display method and the display system help the user who does not know the decoration carry out comparison acceptance and ensure that the decoration reaches design requirements of the user.

An arrangement of receivers and transmitters used in wideband holographic imaging using a reduced number of physical antenna elements compared to established techniques and systems. At least one of the receivers is configured to receive the reflected signal from three or more of transmitters, and at least one transmitter is configured to transmit a signal to an object, the reflection of which will be received by at least three receivers. The improved arrays are easily incorporated into existing microwave and millimeter wave holographic imaging equipment utilizing the existing mechanical features of this equipment, as well as the existing wideband holographic imaging algorithms and electronics for constructing images.

The invention provides a millimeter wave transceiving module for a holographic imaging safety inspection system, which comprises a millimeter wave radio frequency transceiving front end 1, a millimeter wave transceiving switch tree 2 and a millimeter wave transceiving antenna array 3. The millimeter wave radio frequency transmitting front end is used for sequentially transmitting millimeter wave signals to a detected object via the millimeter wave transmitting antenna array through fast electronic switching of the transmitting switch tree; and the scattered millimeter wave signals reflected by the object are received by the millimeter wave receiving antenna array and then sequentially enter into the millimeter wave radio frequency receiving front end through the electronic switching of the receiving switch tree. Necessary amplification and digital sampling treatment are performed on the output signals of the module, and a millimeter wave holographic image of the object can be recovered by operation through the millimeter wave holographic algorithm for safety inspection application. The module adopts full-system single-chip integration, is stable in performances and good in consistency, and further has the product advantages of low cost, easiness in large-scale production and small volume (light load).

A display pixel array is illuminated by infrared light in a frequency band. An infrared holographic imaging signal is generated by driving a holographic pattern onto the display pixel array. An image of an exit signal of the holographic infrared imaging signal is captured with an image pixel array. The image pixel array is configured to capture the infrared light and reject light outside the frequency band.

The invention discloses a single-pixel terahertz holographic imaging device and method. Monochromatic terahertz light emitted by a terahertz laser source is transformed into parallel light with larger beamwidth by a beam expander device, and then divided into object light and reference light through a beam splitter; the object light is encoded by a modulation device in airspace after irradiating an object; the reference light passes through an adjustable phase shifter on the light path after being reflected by a plane mirror; the object light is converged with the reference light on a second beam splitter after being reflected by the plane mirror, enters a single-pixel detector at the focus point of a condenser lens after being converged by the condenser lens; a signal output by the single-pixel detector is fed to a control module to carry out image reconstruction; and terahertz holographic compression sensing imaging of the object is achieved by changing combination of a space code on the modulation device and a phase on the adjustable phase shifter for a plurality of times. The single-pixel terahertz holographic imaging device and method have the advantages that real three-dimensional imaging of the tested object is achieved by combining phase-shifting digital holography with a compression sensing principle, and the single-pixel terahertz holographic imaging device and method are pioneering inventions in the field of terahertz imaging.

The invention discloses a scan method of a human security system utilizing frequency division technology to avoid opposite radiation interference. The method comprises that in a scan period, at a same time, work frequency of detection signals which are provided by a first millimeter wave transceiver and a second millimeter wave transceiver are different. According to the invention, opposite radiation interference of two sides switch antenna arrays of a millimeter wave active three-dimensional holographic imaging human body security system is avoided, and an imaging sharpness level is raised.

The invention discloses an all-solid digital holography imaging system capable of reducing speckle noise, and belongs to the technical field of optical diffraction imaging and digital holography. The all-solid digital holography imaging system capable of reducing the speckle noise comprises a hologram shooting light path, a spatial light modulator, a sample to be detected, an image sensor and a computer. The reference light in the hologram shooting light path is directly incident to the image sensor, the object light in the hologram shooting light path passes through the spatial light modulator and the sample to be detected and then is incident to the image sensor, both the image sensor and the spatial light modulator are connected with the computer, under the control of different phase information provided by the computer, the spatial light modulator is loaded with different random phase mask plates, every time a random phase mask plate is loaded, the image sensor is controlled to record a hologram for one time, multiple holograms are continuously and automatically obtained, and all reproductive images of the holograms are overlapped. The speckle noise of the reproductive images of the digital holography imaging system can be automatically reduced, and the all-solid digital holography imaging system capable of reducing the speckle noise can be used for imaging detection which is relatively high in requirements for instantaneity and distinguishability.

The invention relates to a radio frequency receiving and transmitting front end for a millimeter wave holographic imaging security check system, which comprises a millimeter wave voltage-controlled oscillator, a millimeter wave low-nose amplifier and a millimeter wave quadrature mixer, wherein the millimeter wave voltage-controlled oscillator is connected with the millimeter wave quadrature mixer; the millimeter wave low-nose amplifier is connected with the millimeter wave quadrature mixer; the millimeter wave voltage-controlled oscillator is used for generating a millimeter wave radio frequency signal to be transmitted to a target and a local oscillation signal to be fed back to the millimeter wave quadrature mixer directly; the millimeter wave low-nose amplifier is used for receiving the radio frequency signal carrying the scatter amplitude and phase information of the target to perform low-noise amplification; and the millimeter wave quadrature mixer is used for performing the quadrature mixing of the millimeter wave local oscillation signal directly fed back by the millimeter wave voltage-controlled oscillator and the radio frequency signal amplified by the millimeter wave low-nose amplifier. In the invention, after necessary preamplification and digital sampling treatment of the output signal, the millimeter wave holographic image of the target can be restored by using a millimeter wave holographic algorithm.

A holographic imaging spectrometer, apparatus, and / or method enables the projection of a two-dimensional (2D) slice (having spectral information) of a four-dimensional (4D) probing object. A 4D probing source object is illuminated to emit an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam having spectral information. Collector optics (e.g., an imaging lens) focuses the diffracted plane beam having spectral information to a 2D slice (having spectral information) of the 4D probing source object. The focused 2D slice having spectral information is projected onto a 2D detector array surface. In addition, the holographic element may have multiple multiplexed holograms that are arranged to diffract light from the corresponding slice of the 4D probing source object to a non-overlapping section of the detector.

The present invention extends on-chip lensless microscope systems (10), including optofluidic microscope (OFMs) and holographic imaging microscopes to incorporate computational photography principles. A LF-OFM system 10 includes at least one plasmonic lens (50) with apertures (38), at least one microfluidic channel (28), and an image sensor array (24). The system (10) is capable of generating an image through computational photography.

A method of displaying a Computer Generated Holographic (CGH) image by a display, including setting pixel values of a Spatial Light Modulator (SLM) included in a Head Mounted Display (HMD), producing a interference based holographic image at a first location by projecting coherent light onto the SLM, and re-imaging the holographic image from the first location to form a holographic image in front of an eye of a viewer wearing the HMD. Related apparatus and methods are also described.

The invention discloses a space-division-technology-based scanning method of a human body security check system for avoiding opposite radiation interference. According to the method, during scanning, the detection heights of antenna units in a first millimeter wave switch antenna array and a second millimeter wave switch antenna array are kept different at any time. With the scanning method disclosed by the invention, the opposite radiation interference of the switch antenna arrays on two sides of a millimeter wave active three-dimensional holographic imaging human body security check system is avoided and the imaging definition level is improved.

The invention provides an anti-fake film comprising a base material layer (1), a holographic imaging layer (2) with holographic images, a partially-hollow brightening layer (3) and a light variation composite structure which are sequentially superposed, wherein the light variation composite structure presents a colour at one viewing angle and presents two different colours at the other viewing angle; the light variation composite structure comprises a first layer and a second layer; the first layer is arranged between the brightening layer (3) and the second layer and is partially hollow; the not hollow area of the first layer is at least partially exposed from the hollow area of the brightening layer (3); and the second layer is at least partially exposed from the hollow areas of the brightening layer (3) and the first layer. In addition, the invention also provides a method for manufacturing the anti-fake film.

The invention relates to a surface-type millimeter wave scanning three-dimensional holographic imaging safety check system which comprises a millimeter wave signal emission driving module, a millimeter wave signal acquisition module, a millimeter wave signal processing module, a millimeter wave emission antenna and a millimeter wave reception antenna. The millimeter wave emission antenna and the millimeter wave reception antenna form a surface-type millimeter wave antenna array, wherein the surface-type millimeter wave antenna array is used for scanning a region to be detected; the millimeter wave emission antenna is connected with the millimeter wave signal emission driving module; the millimeter wave reception antenna is connected with the millimeter wave signal acquisition module; and the millimeter wave signal processing module is connected with the millimeter wave signal acquisition module. According to the surface-type millimeter wave scanning three-dimensional holographic imaging safety check system, through the surface-type millimeter wave antenna array, single scanning time is greatly reduced; and meanwhile, since equipment does need to be subjected to mechanical rotation, equipment wearing is not easy to cause, service time of the equipment is substantially prolonged and equipment fault is reduced.

The invention belongs to the technical field of micro-nano optics, polarization optics and optical holographic, and discloses a polarization multiplexing holographic imaging method based on a transmission type all-medium metasurface. A response main wavelength <lambda> is determined; geometric parameters of a unit structure are determined; a GS phase recovery algorithm is adopted to obtain phase distribution of the unit structure responding to the main wavelength; the pixel point of each element is expanded into a 2*2 array by adopting a Dammann grating method, and the obtained each pixel unitcomprises information responding to horizontal polarized light and information responding to vertical polarized light; and a synthesized silicon nano-antenna array is irradiated by horizontal polarized light and vertical polarized light with the wavelength of <lambda>, and different holographic images are reconstructed. According to the method, phase modulation of 0-2 <pi> can be realized only bychanging the size of the short axis of the silicon nano-antenna, and an embossment phase modulation structure of any step number can be realized equivalently; and a simple process, high processing error tolerance and quite high stability and reliability are achieved.