104results about "Active addressable light modulator" patented technology

Aspects of the disclosure include a method for controlling a vehicle via a holographic interface. Aspects include detecting a request, by an occupant of the vehicle, to display a holographic user interface and instructing a holographic display device to display the holographic user interface. Aspects also include detecting an interaction between the occupant and the holographic user interface, identifying a desired action for the vehicle based on the interaction, and instructing the vehicle to perform the desired action.

A flying-over beam pattern scanning hologram microscope device includes: a scan beam generation unit which converts of a first beam and a second beam to a first spherical wave; a scanning unit, which includes a spatial modulation scanner for controlling the scan beam in the horizontal direction, and a translation stage for moving an object in the vertical direction at the rear end of the projection unit; the projection unit projecting the scan beam onto an object plane; and a light collection unit which detects a beam that has passed through the objective lens again after being reflected or fluoresced from the object.

Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and an optical device. The optical device includes: an optical guiding device configured to guide light to propagate along a first direction within the optical guiding device, the light comprising multiple colors of light; an in-coupling diffractive structure configured to diffract the light to propagate in the optical guiding device; and a plurality of out-coupling diffractive structures arranged downstream of the in-coupling diffractive structure along the first direction and configured to diffract at least part of the light out of the optical guiding device along a second direction different from the first direction towards the display. Each of the plurality of out-coupling diffractive structures is configured to separate the multiple colors of light from each other while suppressing crosstalk between the multiple colors of light.

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).

The lighting device of the present application includes a light source unit having a light emitting element; a spatial light phase modulator that performs spatial light phase modulation on incident light from the light source unit, thereby generating a plurality of reproduced images having intervals therebetween on an image surface; and a projection unit that superimposes and projects the plurality of reproduced images on a projection surface through separate projection lenses.

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.

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.

In a spatial light modulation device, a detection unit detects light modulated by a spatial light modulation unit. An estimation unit estimates an incident position of the light onto the spatial light modulation unit on the basis of a detection result obtained by the detection unit. A phase pattern set by a pattern setting unit includes a phase pattern arranged to form a plurality of focused light spots on the detection unit using the light modulated in the set phase pattern. The detection unit detects intensity information of the focused light spots. The estimation unit estimates the incident position of the light onto the spatial light modulation unit on the basis of a comparison result obtained from the intensity information of the plurality of focused light spots detected by the detection unit.

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.

This disclosure provides an apparatus for modulating light, the apparatus comprising a substrate having a plurality of electrical interconnects disposed on its top surface and an array of optical modulation elements disposed on the substrate. The optical modulation elements of the apparatus include an array of optical modulation elements, the array including a bottom electrode disposed on the substrate, wherein the bottom electrode is coupled to an electrical interconnect among the plurality of electrical interconnects, a bottom surface of a first dielectric layer is located above the bottom electrode, and a quantum well layer covering the top surface of the first dielectric layer. A second dielectric layer is then configured to cover the top surface of the quantum well layer, wherein each optical modulation element of the optical modulation element array is spatially separated from each of the other optical modulation elements of the array, and the top electrode is located on top of the optical modulation element array.

In a spatial light modulation device 10, a detection unit 7 detects light modulated by a spatial light modulation unit 3. An estimation unit 35 estimates an incident position P2 of the light onto the spatial light modulation unit 3 on the basis of a detection result obtained by the detection unit 7. A phase pattern P1 set by a pattern setting unit 31 includes a phase pattern arranged to form a plurality of focused light spots on the detection unit 7 using the light modulated in the set phase pattern P1. The detection unit 7 detects intensity information of the focused light spots. The estimation unit 35 estimates the incident position P2 of the light onto the spatial light modulation unit 3 on the basis of a comparison result obtained from the intensity information of the plurality of focused light spots detected by the detection unit 7.

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 aspect of the present disclosure provides a hybrid recording system, wherein the hybrid recording system, with respect to incident light from a target object, comprises an objective lens, a circular polarizer, a geometric phase lens, a variable waveplate, a linear polarizer, and an image sensor that are sequentially arranged and aligned with one optical axis, and wherein the variable waveplate operates in an ON mode to convert a wavefront of two orthogonal circular polarization components that are output from the geometric phase lens into two orthogonal linear polarization components, or operates in an OFF mode.

A holographic storage optical system, relating to the field of holographic storage optics, includes: a first metasurface provided in an optical path of a S-polarized writing light beam, configured to split the writing light beam into a first polarized light and a second polarized light exhibiting an off-axis focusing characteristic; a second metasurface provided in the optical path of the second polarized light, configured to reflect the second polarized light into parallel light; a mask with a target image provided in the optical path of the parallel light; a third metasurface provided in the optical path of the second polarized light and configured to focus the parallel light after it passes through the mask; and a photosensitive material provided at an intersection of the first polarized light and the focused polarized light. The present application simplifies the construction of the holographic storage optical system.

To provide a sub-hogel configuration for a high-definition light field display.SOLUTION: Optical devices and three dimensional light field display technologies are also described, and more particularly, three dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and engineered metasurfaces that act as directional optical elements for light field displays. The described sub-hogel structure designs and methods are suitable for achromatic metasurfaces to provide directional pixels for multi-view light field color displays.SELECTED DRAWING: Figure 1

The image output device disclosed herein facilitates the enlargement of stereoscopic images. This image output device includes a spatial modulator, an image illumination unit, and an addressing light illumination unit. The spatial modulator has a main surface, a back surface, and multiple pixels, reflects light illuminating the main surface, and modulates the phase of the light for each pixel. The image illumination unit illuminates light containing a two-dimensional optical image on the main surface. The addressing light illumination unit illuminates addressing light containing a diffraction grating pattern on the back surface. Each pixel of the spatial light modulator changes its phase modulation amount according to the intensity of the addressing light illuminating from the back surface. The addressing light illumination unit is configured such that the direction of the diffraction grating pattern on the back surface dynamically changes. The image illumination unit illuminates a two-dimensional optical image on the main surface corresponding to the direction of the diffraction grating pattern.

A pixel driver arranged to drive a display device (e.g. phase modulator, LCOS SLM) to display a first and second colour pixel patterns on an array of pixels at the same time. The driver comprises n da

Disclosed is a hologram display device, which includes a light source unit that provides source light, and a light modulation panel spaced apart from the light source unit and including unit pixels and forming a circular shape on a plane, and each of the unit pixels includes first sub-pixels, second sub-pixels, and third sub-pixels, and the number of first sub-pixels included in each of the unit pixels decreases with distance from a center of the light modulation panel moving toward an outer edge of the light modulation panel.

Methods, devices, and systems are provided for displaying three-dimensional objects by individually diffracting light of different colors. In one aspect, an optical diffractive device includes a first diffractive element, a second diffractive element, and a color-selective polarizer therebetween. The first diffractive element is configured to diffract light of a first color in a first polarization state incident at a first angle of incidence with a first diffraction efficiency at a first diffraction angle and to diffract light of a second color in a second polarization state with a diffraction efficiency substantially less than the first diffraction efficiency. The polarizer is configured to rotate a second polarization state of the second color light to the first polarization state. The second diffractive element is configured to diffract light of the second color in the first polarization state with a second diffraction efficiency at a second diffraction angle substantially equal to the first diffraction angle.

The invention relates to a method for verifying a hologram security element (2000) comprising a computer-generated phase hologram (2100) exposed in a manner similar to or identical with a Denisyuk reflection hologram, wherein the computer-generated phase hologram (2100) is the phase image corresponding to the image information in the far field, folded with an imaging function of at least one optical element, and wherein the method comprises the steps: Illumination of coherent light onto the hologram security element (2000) and projection of the light diffracted at the hologram security element onto a reconstruction plane, acquisition of image information (2150) projected onto the reconstruction plane and evaluation of the image information (2150) against a specification, output of a verification decision depending on the comparison with the specification.

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 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.

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 an illuminator, a spatial light modulator (SLM) coupled to the illuminator, a beam redirector and an ocular lens coupled to the SLM. A controller is operably coupled to the SLM and the beam redirector and configured to provide exit pupils at eyebox locations where a holographic image may be observed. The exit pupils provided in a time-sequential manner, forming a grid of exit pupils / eyebox locations. An eye tracking system may be used to center the grid around the current eye pupil position, to provide a larger overall eyebox for viewing the holographically generated image.

A method (100) of designing a segmented display device (1) having a plurality of elements (5) arranged in an array (3), each element (5) providing an individual output such that the plurality of elements (5) form a collective output of the device (1), wherein each element (5) is actuatable to control the individual output, the method (100) comprising: providing (102) a set (7) of images (9) representing a set of collective outputs from the device (1); generating (104) phase maps (13) of the images (9), the phase maps (13) having a phase value for each element (5) of the plurality of elements (5); and based on the phase maps (13), generating a plurality of non-overlapping groups of elements, wherein the elements (5) in each group are arranged to be actuated together as a segment (15) to cause display of any one of the set of collective output.

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.

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.

The invention relates to a light modulation device having pixels. Roughly half of the pixels are reflective pixels and the other half of the pixels are transmissive pixels. The reflective pixels are arranged in an alternating pattern with the transmissive pixels in the same substrate plane. The light modulation device further has a backplane having transistors and data lines for conducting signals to the pixels. Each pixel is assigned at least one transistor and at least two data lines. The transistors and data lines of each adjacent pair of a reflective pixel and a transmissive pixel are arranged underneath the reflective pixel.

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 computer-generated holographic (CGH) display system is described which has an angular resolution at a viewing position and a limiting aperture width. The CGH visualisation system comprises: an illum