288results about "Holographic object characteristics" patented technology

Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes: a display having a plurality of display elements and a driving device coupled to the driving device and configured to: obtain a hologram for the display, wherein the hologram comprises, for each display element of the plurality of display elements, a respective sum of electromagnetic (EM) field contributions of a plurality of primitives corresponding to at least one object to the display element; and generate, for each display element of the plurality of display elements, a respective modulation control signal based on the respective sum of EM field contributions of the plurality of primitives to the display element.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, an optical device includes: a first optically diffractive component including a first diffractive structure configured to diffract a first color of light having a first incident angle at a first diffracted angle, a second optically diffractive component including a second diffractive structure configured to diffract a second color of light having a second incident angle at a second diffracted angle, a first reflective layer configured to totally reflect the first color of light having the first incident angle and transmit the second color of light, and a second reflective layer configured to totally reflect the second color of light having the second incident angle. The first reflective layer is between the first and second diffractive structures, and the second diffractive structure is between the first and second reflective layers.

A hologram generation and streaming method and system using multi-PCs are provided. A hologram streaming service system according to an embodiment of the present invention comprises: a hologram generation server for generating a hologram streaming image by using multiple computers; and a hologram player for playing the hologram streaming image generated in the hologram generating server. Therefore, distributed processing of the multi-PCs is used to generate a hologram at high speed so that a service can be streamed without delay in real time even for a high-resolution hologram.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, an optical device includes: a first optically diffractive component including a first diffractive structure configured to diffract a first color of light having a first incident angle at a first diffracted angle, a second optically diffractive component including a second diffractive structure configured to diffract a second color of light having a second incident angle at a second diffracted angle, a first reflective layer configured to totally reflect the first color of light having the first incident angle and transmit the second color of light, and a second reflective layer configured to totally reflect the second color of light having the second incident angle. The first reflective layer is between the first and second diffractive structures, and the second diffractive structure is between the first and second reflective layers.

A system and a method for measuring occlusion of blood cells flowing in microfluidic channels is disclosed. The system includes an occlusion device having one or more microfluidic channels with a predefined cross-sectional area. The one or more microfluidic channels are configured to allow flow of a plurality of blood cells of a blood sample within an interior surface of the one or more microfluidic channels. Further, at least one imager is configured to generate one or more digital holography images or videos of the plurality of blood cells transiting the one or more microfluidic channels. Further, at least one processor is configured to receive the one or more digital holography images or videos and analyze the generated one or more digital holography images or videos to quantify and / or characterize occlusions formed within the one or more microfluidic channels.

An objective hologram quality evaluation method is provided. The quality evaluation method, according to an embodiment of the present invention, receives an original holographic fringe pattern and a target holographic fringe pattern to be compared, calculates the respective angular spectra of the inputted original holographic fringe pattern and the inputted target holographic fringe pattern, and calculates a PSNR obtained from the calculated angular spectra as a quality value of the target holographic fringe pattern. Since the angular spectrum of the holographic fringe pattern has the same characteristics without change according to distance, even a diffraction wavefront positioned at an arbitrary distance as well as the position of the holographic fringe pattern has the same PSNR value, thereby enabling objective quality evaluation for the holographic fringe pattern.

According to one embodiment, there is provided an optical film (10) with a recording surface (14), the recording surface (14) including: a computation element section (16) in which a phase component of light from each reconstruction point (22) of a reconstructed image is computed, the computation element section corresponding to each reconstruction point one by one; a phase angle recording area (18) in which a phase angle computed based on the phase component is recorded; and a phase angle non-recording area (20) in which the phase angle is not recorded, the phase angle computed based on the phase component being recorded in an overlapping area where the computation element section (16) and the phase angle recording area (18) overlap each other.

A particulate matter detection device takes holographic images of flowing particulate matter concentrated by a virtual impactor, which selectively slows down and guides larger particles to fly through an imaging window. The flowing particles are illuminated by a pulsed laser diode, casting their inline holograms on a CMOS image sensor in a lens-free mobile imaging device. The illumination contains three short pulses with a negligible shift of the flowing particle within one pulse and triplicate holograms of the same particle are recorded at a single frame revealing different perspectives of each particle. A deep neural network classifies the particles based on the acquired holographic images. The device was tested using different types of pollen and achieved a blind classification accuracy of 92.91%. This mobile and cost-effective device weighs ˜700 g and can be used for label-free sensing and quantification of various bio-aerosols over extended periods.

The present invention relates to an automatic real-time label-free holography-activated sorting of the cell's technique. The technique provides high-discriminative power on the level of the individual cell. The technique includes rapid automated cell processing during cell visualization and flow, with high discriminative power on the level of the individual cell. The technique may be useful in detection of cancer and to identify different stages of oncogenesis.

The invention relates to a device for replicating a plurality of holograms. The apparatus comprises: a first carrying device for arranging a series of master elements of a plurality of master elements based on a plurality of holograms to be replicated in such a way that upper surfaces of the master elements are aligned in a horizontal plane; and a lamination module for removably laminating the photosensitive composite web onto the aligned upper surface of the master element. Further, the apparatus comprises: an exposure module for exposing the master element so as to copy the master hologram into the web of photosensitive composite; and a separation module for separating the exposed composite web from the master mask element. The master elements are removably incorporated in the first carrier device such that the sequence and / or composition of the master elements for replicating the plurality of holograms is variable. Furthermore, the master elements are merged in the first carrier such that two or more faces of the master elements are optically accessible for exposure.

One embodiment provides a method comprising obtaining a Fourier transform of an interference pattern, obtaining a central band component from the Fourier transform of the interference pattern, obtaining a sideband component from the Fourier transform of the interference pattern, obtaining a central band inverse Fourier transform image by performing an inverse Fourier transform of the central band component, obtaining a sideband inverse Fourier transform image by performing an inverse Fourier transform of the sideband component, and determining a fringe height reduction factor, the fringe height reduction factor corresponding to an interference fringe height reduction due to motion blur in the interference pattern, based on a comparison between the sideband inverse Fourier transform image and the central band inverse Fourier transform image.

There is provided an optical film (10) including a recording surface (14) on which a plurality of unit blocks (12) are disposed at regular intervals. For these unit blocks (12), phase components of light from a reconstruction point (22) are calculated. The recording surface (14) includes a calculated element region (16) provided with an array of the unit blocks (12) for which phase components of light from the reconstruction point (22) are calculated for reproduction of an image. A first image is a monotone reconstruction image having even brightness, and a second image is a grayscale image having brightness gradation.

A hologram image of an object is acquired in a state where the object is accommodated in a concave portion provided in a container with a bottom surface of the concave portion being curved. A phase image is generated from the hologram image. Processing of subtracting a phase component derived from a polynomial indicating a shape of the bottom surface of the concave portion from the phase image is performed to acquire a processed phase image.

An optically variable image device 1 forms an observable optically variable image / output light pattern, of light 11 scattered from a three-dimensional object / scene 7. A layer 2 of optical material has multiple pixels 3, each pixel encoded with a respective portion of the image, as a representation of scattered light 11 from the object / scene. That portion of the scattered light from the object / scene which is scattered from a respective sub-area 505,508 located on a pre-selected surface 6 of the object / scene corresponds by mapping to the respective pixel 305,308 in which its representation is encoded. Each pixel includes a respective optical structure with optical properties forming a respective phase modulated non-planar wavefront component 12 of the output light pattern. This component (i) corresponds to the respective portion of the image to be formed that is recorded in that pixel, and (ii) has a phase modulation that is characteristic of / a function of, the modulating optical properties of the respective optical structure of that pixel. The component’s shape is independent of the wavefront’s shape of the scattered light from the respective sub-area. The component formed by each pixel has at least one respective main propagation direction 1012,1015. The device may be for security / authentication.

This application relates to a holographic display device comprising a backlight unit and a spatial light modulator, wherein the backlight unit is used to emit light. The spatial light modulator includes a plurality of pixels and a color filter layer comprising a plurality of color filter groups. The pixels are arranged in a zigzag pattern and configured to modulate at least one of the amplitude and phase of the light. Each of the color filter groups includes a first subgroup, a second subgroup, and a third subgroup, the first subgroup including a plurality of first color filters, the second subgroup including a plurality of second color filters, and the third subgroup including a plurality of third color filters, and each pixel is aligned with one of the first, second, and third color filters of the color filter layer.

The invention relates to a method for characterizing microorganisms present in a biological sample, said method comprising acquiring a real-time holographic digital image of the sample, generating a focused image by using a digital model for reconstructing the focused image, and characterizing bacteria based on the focused image. According to the invention, a plurality of calibration objects are provided in the acquisition field of view prior to acquisition of the holographic image, these objects having pre-characterized dimensions and refractive indexes and selected shapes, such that the interference pattern of the objects can be calculated using an image forming model for integrating the optical aberrations of the acquisition device. The optical aberration is limited according to the interference pattern of the object and the calculated interference pattern before the computer generates the focused image, and a digital model used to reconstruct the focused image integrates the quantized optical aberration.

The present invention relates to improved methods for determining the identity of biomolecules using interferometric light scattering instruments, and in particular for distinguishing between variants of biomolecules, such as viral serotypes, etc. Such methods have the potential to simplify testing for biological production, as well as for diagnosing disease, monitoring environmental problems and determining contaminants.

The invention relates to a method (1000) for manufacturing a hologram security element (2000) comprising the steps: Capturing (1010) image information; Calculating (1020) a phase image that corresponds to the image information in the far field; Folding (1030) the phase image with the imaging function of at least one optical element to assign the far field image information to a different display position; Arranging a holographic recording material in front of a reflective spatial phase modulator such that one side of the holographic recording material faces the spatial phase modulator, Exposure of the recording material with coherent light (52) from the side facing away from the spatial phase modulator, such that the coherent light incident on the side facing away from the spatial phase modulator interferes in the holographic recording material with the phase-modulated light reflected from the reflecting spatial phase modulator in order to store a hologram in the recording material (1100).

A holographic display system includes an eye tracker configured to determine a position of a feature of an eye, a light source configured to output image light, and a digital dynamic hologram. The digital dynamic hologram is configured to receive the image light from the light source. The digital dynamic hologram is further configured to spatially modulate the image light based on a target image to form a reconstructed image in the eye. The reconstructed image includes noise that is non-uniformly distributed across the reconstructed image based on the position of the feature of the eye.

The invention relates to a system (1) for digital holographic imaging, comprising at least the following components: a beam splitter (2) that defines four sides with a beam splitter surface (2a), a retroreflector array (3) that is arranged on the second or the third side (22, 23) and comprises a plurality of retroreflector elements (30), and a reference mirror (4) that is arranged on an adjacent side (23, 22) to the retroreflector array (3), wherein the system (1) is configured to impress wavelength-dependent phase shifts on object light (100) for each retroreflector element (3), said phase shifts being different for a plurality of retroreflector elements (3).

A volumetric display system including a volumetric display for displaying a scene viewable as a three-dimensional floating-in-the-air scene in a display space, enabling a user to reach a first object into the display space, a location determination unit locating real objects in the display space, providing a location of the first object when the first object is inserted into the display space, and a computer for receiving the location of the first object, detecting when the location of the first object is at a location where an object is displayed in the three-dimensional scene, thereby determining that the first object is viewable as touching the displayed object following a detection of the first object viewable as touching the displayed object, producing a new three-dimensional scene displaying the displayed object as if manipulated by the first object. Related apparatus and methods are also described.

A holographic projection system for forming, at a replay plane, a holographic reconstruction of a picture comprising an array of pixels, the system comprising a detector arrangement to detect light received by a first detection area (1205, fig.11); wherein an optical alignment process comprises: selecting a first pixel of the array of pixels; forming a first holographic reconstruction of a first picture, the first picture comprising a control region 1606 (1202, fig.11) comprising the selected first pixel; moving the first holographic reconstruction between a plurality of positions with respect to the first detection area in a first dimension 1604 of the replay plane (scanning / translating the holographic reconstruction with respect to a detector, for example using grating functions); and determining a value for a parameter (e.g power) of the light received by the detection area in each of the plurality of positions; wherein, if the parameter value does not meet a threshold condition over the plurality of positions, the optical alignment process is repeated using a second pixel of the array of pixels that neighbours the first pixel; and a second holographic reconstruction of a second picture is formed, the second picture comprising a control region 1608 comprising the second pixel.

The present disclosure relates to a device for printing dual holographic, including a plurality of lasers that represents different wavelengths, a plurality of dichroic lenses and mirrors that combine beams output from the plurality of lasers into one beam and output the combined beam as a white beam, a plurality of beam splitters that separates the white beams output through the plurality of dichroic lenses and mirrors, transmit the separated white beams to a stereogram printing device, a wavefront printing device, and a reference beam, separates a beam heading to the reference beam, and transmits the separated beam to the stereogram printing device and the wavefront printing device, and a computer that controls the stereogram printing device and the wavefront printing device so that a hologram is printed with the beam transmitted through the beam splitters.

A holographic display includes a light source configured to emit incoherent light, a spatial light modulator (SLM) disposed at a Fourier plane of the light source and configured to modulate the incoherent light and emit the modulated incoherent light as diffused light, and at least one lens disposed downstream of the spatial light modulator and configured to focus the modulated incoherent light, and the spatial light modulator receives an RGB-D image signal and converts the incoherent light array incident from the light source into a first light, which is a coherently-reconstructed incoherent sum (CRIS) for implementing a 3D hologram.

A method for a display device begins by receiving data representative of a set of two-dimensional (2D) scene layers, with each 2D scene layer having a corresponding predetermined display depth in a focus space, and generating a first hologram pattern for each 2D scene layer of the set of 2D scene layers to create a set of first hologram patterns, where each first hologram pattern of the a set of first hologram patterns is adapted to place an associated 2D scene layer at infinite depth. The method continues by using a mathematical lens function to convert each first hologram pattern of the set of first hologram patterns to a second hologram pattern to create a set of second hologram patterns, where each second hologram pattern is adapted to place an associated 2D scene layer at a corresponding predetermined display depth in the focus space. Finally, the method continues by aggregating the set of second hologram patterns to provide an aggregated hologram pattern.

The present invention improves user experience. The information processing apparatus includes a grouping unit (21) that groups a plurality of pixels constituting one or more objects included in one piece of image data into one or more groups, a phase adjustment unit (22) that assigns a phase pattern having a different phase difference for each of the one or more groups to the plurality of pixels, and a calculation unit (30) that generates hologram data from the image data to which the phase pattern is imparted.

There is provided a hologram quality assessment method. The quality assessment method according to an embodiment may receive an input of an original holographic fringe pattern and a target holographic fringe pattern which is a comparison target, may calculate angular spectra of the inputted original holographic fringe pattern and target holographic fringe pattern, respectively, and may calculate a PSNR as a quality value of the target holographic fringe pattern from the calculated angular spectra. Since the angular spectrum of the holographic fringe pattern has the same characteristic without a change according to a distance, not only a diffraction wavefront that is positioned at a position of the holographic fringe pattern but also a diffraction wavefront positioned at a certain distance may have the same PSNR value. Accordingly, objective quality assessment for a holographic fringe pattern is possible.

Concealed Individualized Hologram Security Element and Method and Device for Verification The invention relates to a method (1000) for producing a hologram security element (2000) comprising the steps: capturing (1010) image information; calculating (1020) a phase image that corresponds to the image information in the far field; folding (1030) the phase image with the imaging function of at least one optical element to assign the far-field image information to a different display position;Arranging a holographic recording material in front of a reflective spatial phase modulator, such that one side of the holographic recording material faces the spatial phase modulator, exposing the recording material with coherent light (52) from the side facing away from the spatial phase modulator, so that the coherent light incident on the holographic recording material from the side facing away from the spatial phase modulator interferes with the phase-modulated light reflected from the reflective spatial phase modulator in order to store a hologram in the recording material (1100). The invention further relates to a manufacturing device, a verification method and a verification device.