61results about "Digital holography electronic component" patented technology

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.

A projection system comprising a display device, a hologram engine and a waveguide. The display device is arranged to display a hologram of an image and spatially modulate light in accordance with the hologram to form a holographic wavefront. The hologram engine is arranged to calculate the hologram. The hologram is arranged to angularly distribute light within the holographic wavefront in accordance with spatial position within the image such that continuous angular ranges of the holographic wavefront respectively correspond with continuous regions of the image. The waveguide comprising a pair of parallel reflective surfaces arranged to waveguide the holographic wavefront therebetween. A first surface of the pair of parallel reflective surfaces is partially reflective-transmissive so as to form an output comprising a plurality of emission zones for the holographic wavefront. The hologram engine is arranged to modify the hologram to at least partially compensate for a decrease in intensity of the emission from each successive emission zone of the waveguide caused by the partial reflection-transmissions at the first surface during waveguiding.

A method comprising: receiving a first signal indicating a first viewing position of a user within a viewing space of a head-up display; determining a first intensity for a first target image based on a distance between the first viewing position and a predetermined reference viewing position within the viewing space; and illuminating a first hologram corresponding to the first target image to holographically reconstruct the first target image at the first intensity; then, receiving a second signal indicating a second viewing position of the user within the viewing space, wherein the second viewing position is different to the first viewing position; and determining a second intensity for a second target image based on a distance between the second viewing position and the predetermined reference viewing position within the viewing space; illuminating a second hologram corresponding to the second target image to reconstruct the second target image at the second intensity; wherein the second intensity is different to the first intensity, and a difference between the first intensity and the second intensity indicates whether the second viewing position is closer to the predetermined reference viewing position or further from the predetermined reference viewing position compared to the first viewing position.

The invention relates to a system for a functionalized door pane through which person- and / or object-related authorization control can be performed. For person-related control, a holographically based, stereoscopic Holocam, which can be integrated into the pane, can be included. Furthermore, a holographic display, which can also be integrated into the pane, can be included. By appropriate methods, the authorization control can be performed, and a door locking mechanism and a holographic display can be controlled by the control device.

An image reproduction device 6 reproduces an image including N different parameters of a wavelength range or the like, and comprises: a multiplexed hologram acquisition unit 61 for acquiring N to 2N multiplexed holograms obtained by multiplex-recording interference patterns for each parameter; a parameter selection unit 63 for selecting the parameters one by one; a hologram generation unit 64 for generating a calculation hologram including two light waves having the selected parameters from the multiplexed holograms; and a light wave restoration unit 65 for restoring one of the two light waves from the calculation hologram.

A method and apparatus for controlling lightfield and / or holographic media to be streamed to a client, determining a bandwidth based on a status of a client buffer, splitting the scene of the lightfield and / or holographic media, determining whether the assets are present in the client buffer, mapping the assets to respective ones of the split scenes and to the client buffer, controlling a transmission assets to the client buffer based on the bandwidth, the mapping, and whether one or more of the assets are determined to be present in the client buffer, and controlling the client to reuse at least one of the assets when rendering at least one of the split scenes.

A method of determining a hologram of an image for a system comprising a display device and viewing system. The display device is arranged to display the hologram. The viewing system is arranged to view the hologram through a pupil expander. The pupil expander provides a plurality of light propagation paths from the display device to the viewing system. The method comprises first to fifth stages. The first stage comprises determining a first complex light field at an entrance pupil of the viewing system. The first complex light field results from the propagation of light from a display plane of the display device along at least one light propagation path of the pupil expander. The first stage also comprises cropping in accordance with the entrance pupil of the viewing system. The second stage comprises determining a second complex light field at a sensor plane of a sensor of the viewing system. The second complex light field results from the propagation of light of the first complex light field from the entrance pupil through a lens of the viewing system. The second stage also comprises modifying the amplitude component in accordance with the image. The third stage comprises determining a third complex light field at the entrance pupil. The third complex light field results from the reverse propagation of light of the second complex light field from the sensor plane back through the lens. The third stage also comprises cropping in accordance with the entrance pupil. The fourth stage comprises determining a fourth complex light field at the display plane. The fourth complex light field results from the propagation of light of the third complex light field back along the at least one light propagation of the pupil expander. The fourth stage also comprises cropping in accordance with the display device. In a fifth stage, the hologram is extracted from the fourth data set.

An apparatus for additively manufacturing three-dimensional objects includes one or more laser beam sources configured to generate a laser beam, and one or more modulation devices disposed downstream of the one or more laser beam sources and configured to receive the laser beam and modulate the laser beam to generate a modulated beam. One or more computing systems are configured to generate one or more output images based on an input to the one or more computing systems of a wavefront pattern, wherein the one or more output images are generated by at least one of a graphics processing unit (GPU) or an integrated circuit. The one or more computing systems are configured to control the one or more modulation devices to generate the modulated beam with the wavefront pattern based on at least one output image of the one or more output images.

There is provided a light engine 1200 arranged to provide a viewing system with spatially modulated light. The viewing system has an entrance pupil 1209. The light engine comprises a display device 12

A method of reconstructing an image from a hologram, comprising: receiving an image for display within a display area of a display system, wherein the display area is visible from a viewing area spatially separated therefrom; determining a first image component of the image; calculating a hologram of the image, wherein the hologram is configured to angularly distribute light in dependence on position within the image such that angularly distributed light corresponds to respective contiguous regions of the image; displaying the hologram on a display device and spatially modulating light in dependence on the displayed hologram; propagating the spatially modulated light through a pupil expander arranged to provide a plurality of different light propagation paths for the spatially modulated light from the display device to the viewing area, wherein each light propagation path corresponds to a respective contiguous region of the image due to the angular distribution of light from the hologram, wherein the method comprises allocating more data processing resources to calculating the hologram in respect of the first image component of the image than the second image component.

A geometric phase in-line scanning holography system for a transmissive object, includes: a polarization sensitive lens, which receives a linear polarization beam to generate a first spherical wave of right-sided circularly polarized light and a second spherical wave of left-sided circularly polarized light; a scan means for scanning the transmissive object by using an interference beam generated between the generated first and second spherical waves; a first beam splitter, which receives a beam having been transmitted through the transmissive object, so as to split the received beam into first and second output beams; first and second polarizers for polarizing the first and second output beams, respectively; and first and second photodetectors for detecting output beams having passed through the first and second polarizers.

The invention relates to a measurement method for determining at least one replication parameter for a replication method using at least one master element. The measurement method involves providing: a master element comprising a reflection hologram; a light source; a detector; and a diffuser. The diffuser is positioned between the master element and the detector. The measurement method also involves irradiating the master element with light by means of the light source, sensing an intensity distribution of the light exiting the diffuser by means of the detector, and determining at least one replication parameter on the basis of the sensed intensity distribution.

A method of producing an optoelectronic component (10, 20, 30, 40, 50, 60) comprises the following method steps. A carrier (101) is provided with a holographic medium (104) attached to atop side (102) of the carrier (101). An optoelectronic semiconductor chip (105) is arranged at a bottom side (103) of the carrier (101) and the optoelectronic semiconductor chip (105) is connected to the carrier (101) rigidly. The optoelectronic semiconductor chip (105) is designed to emit electromagnetic radiation. A hologram is generated by illuminating the holographic medium (104). The hologram is designed as an optical component for electromagnetic radiation emitted by the optoelectronic semiconductor chip (105).

An apparatus for additively manufacturing three-dimensional objects includes one or more laser beam sources configured to generate a laser beam, and one or more modulation devices disposed downstream of the one or more laser beam sources and configured to receive the laser beam and modulate the laser beam to generate a modulated beam. One or more computing systems are configured to generate one or more output images based on an input to the one or more computing systems of a wavefront pattern, wherein the one or more output images are generated by at least one of a graphics processing unit (GPU) or an integrated circuit. The one or more computing systems are configured to control the one or more modulation devices to generate the modulated beam with the wavefront pattern based on at least one output image of the one or more output images.

A method of head-up display is provided. The method comprises receiving a signal indicating that a viewing position within a viewing window has changed. The method further comprises changing an intens

Systems and methods of determining a hologram of an image for a system comprising a display device and viewing system are disclosed. Some embodiments implement a multi-stage procedure comprising (i) determining a first complex light field at an entrance pupil of the viewing system, (ii) determining a second complex light field at a sensor plane of a sensor of the viewing system, (iii) determining a third complex light field at the entrance pupil, and (iv) determining a fourth complex light field at the display plane. Some embodiments include extracting a hologram from a data set corresponding to the fourth complex light field.

A method and system for processing a computer-generated hologram (CGH) are disclosed. The system for processing a CGH includes a CGH generation device and a display device. The CGH generation device repeatedly performs propagating object data from a first depth layer to a second depth layer, changing amplitude data of the object data to second predetermined amplitude data, reverse-propagating the object data from the second depth layer to the first depth layer, changing the amplitude data of the object data to first predetermined amplitude value data, and generating a CGH by using object data.

Method for obtaining an image of a sample (10), comprising: - a) illumination of the sample using a light source (11); - b) acquisition, using an image sensor (16), of a first image (I1,P0) of the sample (10), formed in the detection plane (P0), the first image being representative of an exposure light wave (14) propagating from the sample, towards the image sensor, along a first optical path (L1); the method comprising, following b) - c) modification of an optical refractive index, between the image sensor and the sample; - d) following c), acquisition, of a second image (I2,P0) of the sample, representative of the exposure light wave (14) along a second optical path (L2); - e) Implementation of an iterative algorithm combining the first and second images to obtain an image of the sample. Figure 2A

Method of manufacture, involving flip chip bonding and apparatus for Liquid Crystal on Silicon [LCOS] Spatial Light Modulator (SLM) [Fig. 17; 550], comprising: Substrate comprising first and second op

In some embodiments, holographic presentations despite using holographic displays having limited viewing angles may be facilitated. In some embodiments, a user may be detected via one or more sensors associated with a holographic display system, where the holographic display system being configured with a first viewing angle. Based on the detection of the user, a direction of the user may be determined. The first viewing angle of the holographic display system may also be determined. For example, the holographic display system may determine a current first viewing angle. Based on the direction of the user, the first viewing angle may be adjusted such that the user becomes within the adjusted first viewing angle of the holographic display system.

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.

A system for displaying a holographic image of an object behind a real object surface, including a computing unit for computing data for displaying a three-dimensional image of an object, a location measurement unit for measuring a location of a surface of a real object, a display for displaying the three dimensional image of the object, wherein the computing unit is adapted to compute data to display the three-dimensional image of the object at least partly behind the surface of the real object. Related apparatus and methods are also described.

Methods, apparatus, devices, subsystems, and systems for holographically displaying live scenes including one or more three-dimensional (3D) objects are provided. In one aspect, a method includes capturing optical holograms of a live scene, digitizing / processing the optical holograms, and holographically reconstructing the live scene based on the digitized / processed holograms. In another aspect, a method includes capturing images / videos of a live scene, computing corresponding holograms, and holographically reconstructing the live scene based on the computed holograms.

A method of reconstructing an image from a hologram. The method comprises first to fifth steps. The first to fifth steps may be performed in order. The first step comprises receiving an image for display within a display area. The display area is viewable or visible from a viewing area spatially separated therefrom. The second step comprises determining a first image component of the image. The third step comprises determining or calculating a hologram of the image. The hologram is configured to angularly distribute light in accordance with position within the image such that angular channels of angularly distributed light correspond with respective continuous regions of the image. The fourth step comprises displaying the hologram on a display device and spatially modulating light in accordance with the displayed hologram. The fifth step comprises propagating each spatially modulated light through a pupil expander arranged to provide a plurality of different light propagation paths for the spatially modulated light from the display device to the viewing area. Each light propagation path corresponds to a respective continuous region of the image owing to the angular distribution of light from the hologram. The fifth step may be achieved by arranging the pupil expander to receive the spatially modulated light from the display device. Notably, the method comprises apportioning more data processing resources to calculation of the hologram with respect to the first image component than a second image component of the image.

A method of modulating a depth of a hologram, the method includes: obtaining hologram data; determining a scale factor based on a hardware specification of a holographic display to display a three-dimensional (3D) hologram image in a space by using the hologram data; and modulating depth information of the hologram data based on the scale factor.

Provided is a method for providing optimized holograms by extracting system characteristics of a holographic display. A hologram providing method according to an embodiment may extract system characteristics of a holographic display by using a hologram that is generated by a holographic display system from a reference image, and a hologram that is numerically reconstructed from the reference image, and may provide holograms generated by reflecting the extracted system characteristics to the holographic display system. Accordingly, realism of holograms may be maximized.

A projection system comprising a display device, a hologram engine and a waveguide. The display device is arranged to display a hologram of an image and spatially modulate light in accordance with the hologram to form a holographic wavefront. The hologram engine is arranged to calculate the hologram. The hologram is arranged to angularly distribute light within the holographic wavefront in accordance with spatial position within the image such that continuous angular ranges of the holographic wavefront respectively correspond with continuous regions of the image. The waveguide comprising a pair of parallel reflective surfaces arranged to waveguide the holographic wavefront therebetween. A first surface of the pair of parallel reflective surfaces is partially reflective-transmissive so as to form an output comprising a plurality of emission zones for the holographic wavefront. The hologram engine is arranged to modify the hologram to at least partially compensate for a decrease in intensity of the emission from each successive emission zone of the waveguide caused by the partial reflection-transmissions at the first surface during waveguiding.

A holographic projection system, a method and apparatus for processing a holographic projection image, an electronic device, a computer readable storage medium, and a computer program product are provided. The system includes a near field communication information storage, for storing image content configuration information readable a by near field communication mechanism; and a holographic projection body provided with a near field communication scanner, for reading the image content configuration information in the near field communication information memory through the near field communication scanner and presenting a holographic projection corresponding to the image content configuration information.

Method and system for characterizing submicron and / or nanoparticles by the use of subwavelength interferometric microscopy, the method comprising illuminating a sample comprising at least one particle and determining a first parameter indicative of scattering cross section of the at least one particle from a detected first portion of light and determining a second parameter indicative of scattering cross section of the at least one particle from a detected second portion of light.

An augmented reality eyeglass includes a near-eye display that includes an image amplitude modulated light source coupled with a spatial phase modulator or active area panel modulator and optically coupled with an eye coupling optic. The image amplitude modulated light source can include a light emitting 2D display panel or a light source coupled to an image amplitude modulator. The eye coupling optic can include a volume holographic diffraction grating.