354 results about "Light diffraction" patented technology

A system for displaying a virtual image (310) to a user comprises a light engine (111) that generates display light (290) representing the virtual image, a diffractive waveguide (335) that focuses a first component light of the generated display light at a first focal distance from an eye of the user and focuses one or more additional component lights of the generated display light at one or more different other focal distances from the eye of the user, and one or more processors (1002) communicatively coupled to the light engine and configured to modify the virtual image to correct for a perceived distortion of at least one of the one or more additional component lights.

The invention discloses a virus infection positioning detection method and system based on diffractive optics. The method comprises the following steps: acquiring diffraction fingerprints corresponding to all to-be-detected cells in an imaging area by utilizing a diffraction imaging principle; respectively extracting texture features of each diffraction fingerprint in the imaging area by using a gray level co-occurrence matrix method; the extracted texture features are compared with standard texture features pre-stored in a relation model of cell morphological change and diffraction fingerprints, so that the'cell state 'of each cell to be detected in the imaging area can be obtained, and the virus infection state of each cell in the imaging area can be positioned and identified. The efficient light diffraction spectrum system is used for virus infection detection, and the requirement for professionals and expensive and complex professional field detection equipment is eliminated. The continuous and high-throughput evaluation on the cell condition after virus infection is met, and a foundation is laid for popularization and application of a virus infection instant detection platform.

The invention discloses a spatial diffraction deep neural network asymmetric multifunctional imaging method and system, and is suitable for the field of optical signal processing. The system is composed of a signal input module, an all-optical diffraction neural network module and a signal acquisition module. The signal input module is responsible for providing a light source and a modulation element and is used for generating and modulating a light field signal. And the all-optical diffraction neural network module adopts a double-loss function optimization strategy to carry out asymmetric training. Specifically, different loss functions are introduced in different transmission directions to train different functions at the same time, so that diversified processing of signals is realized. And the signal acquisition module is responsible for acquiring and storing a final calculation result. Different imaging functions can be realized according to different signal input directions, so that diversified requirements of optical signal processing are met, the blank of related fields is filled, and a brand new thought is provided for further research and application of the optical imaging field.

Provided is an external electrode paste capable of improving the strength and moisture resistance reliability of a dry film. This external electrode paste which is used for forming an external electrode of a multilayer ceramic electronic component comprises: an acrylic resin and an ethyl cellulose-based resin which are at least partially copolymerized; a Cu powder; a glass powder; and a solvent. For D50_Cu of the Cu powder and D50_Glass of the glass powder obtained by a laser diffraction scattering-type particle size distribution measurement method, the ratio (D50_Glass / D50_Cu) of D50_Glass to D50_Cu is 0.13-0.67, D50_Cu is 3.0 μm or less, and the BET specific surface area (SSA_Glass) of the glass powder is 1.7-20 m2 / g. <sp / >

The invention discloses an all-optical vortex beam orbital angular momentum mode identification method and system, and relates to the field of optical information processing and optical computing, and the method comprises the steps: S1, constructing a multi-layer architecture all-optical diffraction network; s2, dividing the output detection surface after the diffraction network into a plurality of preset space regions; s3, the vortex light beams carrying orbital angular momentum OAM information sequentially penetrate through the all-optical diffraction network, spatial evolution of a light field in the propagation process is completed, and vortex light classified according to intensity distribution is output; s4, mapping the topological charges of the vortex light to different sub-regions of the detection surface in an intensity distribution form; and S5, performing intensity acquisition on each area on the detection surface through a detector, and determining an OAM mode type of the input light field based on the mode number corresponding to the area with the maximum light intensity. The method is used for performing high-robustness identification on the orbital angular momentum vortex light mode of the vortex light in the presence of a random phase scattering medium.

The invention discloses a grating waveguide device and waveguide system based on a polarization volume grating technology, and belongs to the technical field of augmented reality display. The device comprises a waveguide substrate and a grating structure, the grating structure adopts a liquid crystal material to form a periodic refractive index modulated PVG through a light-induced orientation and self-assembly process, the polarization state of a light beam can be selectively regulated and controlled, and the rainbow pattern phenomenon caused by ambient light diffraction is inhibited. The efficient diffraction and total internal reflection transmission of the multi-wavelength light beam are realized by optimizing the grating period, the Bragg inclination angle and the waveguide matrix parameters and combining Zemax simulation to optimize the light beam propagation path. The waveguide system can be matched with AR glasses, a head-mounted display and other devices, the intensity of the rainbow lines is remarkably reduced under the complex ambient light condition, and high-definition and distortion-free visual experience is provided.

The invention relates to a glass heating system, a heating wire arrangement method and device and a vehicle, and belongs to the technical field of vehicles. The system comprises a glass body, a camera module and a heating wire, wherein the camera module comprises a first camera and a second camera, the visual field area of the first camera is located in the visual field area of the second camera, and the overlapping area between the visual field area of the first camera and the glass body is a first area; the arrangement position of the heating wire on the glass body does not comprise the first area. Therefore, in the scheme, the arrangement position of the heating wire can avoid the first area, that is, the overlapping area between the view area of the first camera and the glass body is avoided, so that the light diffraction phenomenon does not occur in the first area, the influence of the light diffraction phenomenon on the imaging quality of the first camera is avoided, the imaging quality of the first camera is favorably improved, and the imaging quality of the first camera is improved. Particularly, under the application scene that the camera module is used for intelligent driving, the safety of intelligent driving is improved.

An electronic device may include a waveguide that directs light to an eye box. The waveguide may include a diffractive grating structure. A projector may generate image light coupled into the waveguide by a first input coupler. A light source may generate supplemental light coupled into the waveguide by a second input coupler. The diffractive grating structure may couple the image light out of the waveguide within a central region of the field of view (FOV) of an eye box and may couple the supplemental light out of the waveguide at a location within a peripheral region of the FOV. The location may be outside of the central region by at least 10 degrees. A gaze tracking sensor may estimate a user's gaze direction at the eye box. A processor may wake or power down the projector responsive to the gaze direction overlapping the location for a predetermined time period.

Provided are a light guide element in which incidence light can be emitted with high use efficiency and a wide FOV can be obtained for use in AR glasses, and an image display device and a sensing apparatus that include the light guide element. The light guide element includes a light guide plate and first to third diffraction elements, in which the first diffraction element diffracts incidence light in two or more different directions to be incident into the light guide plate, the second diffraction element includes a plurality of diffraction elements that diffract the light to the third diffraction element, the third diffraction element emits the light from the light guide plate, and at least one of the first diffraction element or the third diffraction element has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction.

A display device includes a display array comprising a plurality of binary pixels, each binary pixel comprises at least one light source with two light source modulating pixels configured to form three or more binary patterns. A device further includes a first layer above the at least two light source modulating pixels, the first layer comprises a light diffraction material across the binary pixel, wherein the light diffraction material is configured to cause a first modification of a first binary pattern to output a first light, cause a second modification of a second binary pattern to output a second light, and cause a third modification of a third binary pattern to output a third light, wherein the first, second and third output light have substantially different visual characteristics.

A weapon sight includes a chassis and an optical system. The chassis is coupleable to a firearm. The optical system is coupled to the chassis and includes a light source, a collimator, a mirror, a diffraction grating, and a hologram. The light source is a light emitting diode (LED) that emits light. The collimator receives the light from the light source and reflects the light in parallel rays. The folding mirror receives the light from the collimator and reflects the light in the parallel rays. The diffraction grating receives the light from the folding mirror and diffracts the light. The hologram receives the light from the diffraction grating to output a reticle visible by a user of the weapon sight.

A computing device may include a display having a periodic structure. The computing device includes a light source that emits light towards at least a portion of the display, and the periodic structure of the display may diffract tire light into a plurality of light dots that are projected onto a scene. The computing device includes a camera, that may capture the plurality of light dots in the scene. The computing device may determine depth values associated with the plurality of light dots.

Systems and methods for performing contactless wellhead displacement measurements include receiving a shadowgraph from an imaging sensor based on a shadow generated by a portion of a wellhead blocking light from a coherent infrared light source, the infrared light having a wavelength away from water absorption wavelengths and solar maxima wavelengths. A feature is detected in the shadowgraph based on interference patterns in the shadowgraph caused by diffraction of the light. The feature represents an edge of the portion of the wellhead. A displacement of the wellhead is measured based on the location of the feature in the shadowgraph and a previously detected location of the feature.

To provide an electrolyte particle for use in the manufacture of a solid oxide electrochemical cell, which is a solid electrolyte sintered body constituting a solid oxide electrochemical cell and which can be efficiently manufactured by sintering a densified sintered body having a high relative density at, for example, 1200°C or lower, and a dispersion liquid containing the electrolyte particle.SOLUTION: The present invention relates to an electrolyte particle containing at least one selected from (A) stabilized zirconia consisting of 3.0 to 10.0 mol% scandium oxide, 0 to 2.0 mol% cerium oxide, and 88.0 to 97.0 mol% zirconium oxide, (B) stabilized zirconia consisting of 0.5 to 15.0 mol% yttrium oxide and 85.0 to 99.5 mol% zirconium oxide, and (C) stabilized zirconia consisting of 0.5 to 15.0 mol% ytterbium oxide and 85.0 to 99.5 mol% zirconium oxide, and having a volume average particle diameter of 50 to 150 nm measured using a laser diffraction method.SELECTED DRAWING: Figure 1

Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

The present disclosure relates to a waveguide for an augmented reality or virtual reality display, a display, and a method of manufacturing a waveguide. In one embodiment, a waveguide for an augmented reality or virtual reality display comprises: an output diffractive element comprising a plurality of optical structures in a photonic crystal; a first main surface of the waveguide and a second main surface of the waveguide, the first main surface being separated from the second main surface in a direction perpendicular to the plane of the waveguide, where light propagates along the waveguide towards the output diffractive element by undergoing total internal reflection between the first main surface and the second main surface, a plurality of optical structures are arranged in a plane of the waveguide in an array configured to receive light from an input direction and diffract the light into a plurality of stages, some of which are diffracted in the plane of the waveguide at an angle to the input direction to provide a 2D extension across the plane of the waveguide, and the other stages are coupled out towards the viewer in a direction perpendicular to the plane of the waveguide.

The invention discloses a multicolor shoe material preparation method and mold, and the method comprises the following steps: preparing a mold which comprises an upper mold and a lower mold, the upper mold is internally provided with an upper mold cavity, and the lower mold is internally provided with a lower mold cavity; the surface of the upper mold cavity and the surface of the lower mold cavity are polished to form polished surfaces, the mirror surface effect is formed, a plurality of regularly-arranged grooves are carved in the polished surfaces through laser, light diffraction occurs when incident light makes contact with the grooves, and the multi-color colorful effect is formed on the polished surfaces of the upper mold cavity and the lower mold cavity; raw materials are placed in the mold, the upper mold cavity and the lower mold cavity are filled with the raw materials, the raw materials are formed in the mold, the colorful effect of the surfaces of the upper mold cavity and the lower mold cavity is formed on the surface of the shoe material, and a product is taken out after mold opening to obtain the shoe material with the colorful effect on the surface. In the forming process, the multi-color dazzling effect is directly generated on the surface of the shoe material, follow-up procedure treatment is not needed, efficiency is improved, and cost is reduced.

Disclosed herein is a waveguide-based display comprising: an optically transparent substrate; an input grating comprising an emptied periodic structure (EPS) supported by the substrate, where the input grating diffracts light into total internal reflection (TIR) within the substrate; a folded grating including an EPS or a volume Bragg grating (VBG), where the folded grating receives the TIR light and expands the TIR light in a first direction; and an output grating including an EPS or a VBG. The output grating receives the expanded light and outputs the light, and the input grating is spatially separated from the folding grating and the output grating.

An anti-light leakage diffractive optical waveguide apparatus (100), comprising a waveguide substrate (100a), and an in-coupling grating (110) and an out-coupling grating (120) which are formed on the substrate (100a). The out-coupling grating (120) comprises a two-dimensional grating structure (120A) formed on one substrate surface (101) of the waveguide substrate (100a), the two-dimensional grating structure (120A) comprising a structure surface (11) extending along a direction parallel to the substrate surface (101), and a plurality of optical unit structures (10) arranged in an array along the structure surface (11), the optical unit structures (10) being columnar structures, an end face (10a) and a side wall (10b) which is connected between the end face (10a) and the structure surface (11) being formed on each optical unit structure (10), and the end faces (10a) being inclined with respect to the substrate surface (101). The anti-light leakage diffractive optical waveguide apparatus (100) modulates the depth / height direction of the two-dimensional grating structure (120A), facilitating the suppression of light leakage on the field-of-view side and improving the out-coupling efficiency of the diffractive optical waveguide to an observation window.

An apparatus is provided. The apparatus includes a light guide configured to guide a first light to propagate in the light guide. The device also includes an optical film coupled with the light guide, the optically anisotropic molecules in the optical film being configured with an in-plane orientation pattern having an in-plane pitch along a predetermined in-plane direction. Azimuth angles of the optically anisotropic molecules are configured to vary non-linearly in a predetermined in-plane direction within in-plane pitches of the in-plane orientation pattern. The optical film is configured to diffract the first light into a plurality of second light at a plurality of predetermined different diffraction efficiencies at a plurality of positions of the optical film.

A retinal projection device includes: a switching unit capable of switching an optical path of a beam; a combiner that converts the beam into parallel light; and a notch filter that passes circularly polarized light with a first polarity in light of the red wavelength, passes circularly polarized light with the second polarity in light of the green wavelength, and passes circularly polarized light with the first polarity in light of the blue wavelength. The combiner includes: a first holographic diffraction layer that diffracts circularly polarized light with the first polarity in a first wavelength range including the red wavelength; a second holographic diffraction layer that diffracts circularly polarized light with the second polarity in a second wavelength range including the green wavelength; and a third holographic diffraction layer that diffracts circularly polarized light with the first polarity in a third wavelength range including the blue wavelength.

A display system includes a display region configured to form an image thereacross for viewing by a viewer and including a light emitting region configured to emit light and a light non-emitting region not configured to emit light; and a light diffractive layer configured to be between the viewer and the display region and disposed substantially parallel to, and spaced apart along a thickness direction of the display system from, the display region. The light diffractive layer includes a light diffractive region configured to diffract light and a light non-diffractive region not configured to diffract light. The light diffractive and non-diffractive regions of the light diffractive layer are aligned, and substantially coextensive in length and width, with the respective light non-emitting and emitting regions of the display region.

Quantitative phase imaging (QPI) is a label-free computational imaging technique that provides optical path length information of objects. Here, a diffractive QPI network architecture is disclosed that can synthesize the quantitative phase image of an object by converting the input phase information of a scene or object(s) into intensity variations at the output plane. A diffractive QPI network is a specialized all-optical device designed to perform a quantitative phase-to-intensity transformation through passive diffractive / reflective surfaces that are spatially engineered using deep learning and image data. Forming a compact, all-optical network that axially extends only ˜200-300λ (λ=illumination wavelength), this framework replaces traditional QPI systems and related digital computational burdens with a set of passive substrate layers. All-optical diffractive QPI networks can potentially enable power-efficient, high frame-rate and compact phase imaging systems that might be useful for various applications, including, e.g., on-chip microscopy and sensing.

Systems and methods are disclosed herein that include a polarization sorting metasurface microlens array device. In a particular embodiment, a polarization imaging device is provided. A polarization imaging apparatus includes: an image light source; a metasurface lenslet array including a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets include a plurality of first metasurface lenslets configured to diffract image light into first polarized light in a first direction and second polarized light in a second direction; and an image sensor in an optical path of the first polarized light and the second polarized light, and wherein the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarized light and a second image sensing unit positioned to sense the second polarized light.

The invention relates to a light leakage prevention diffraction optical waveguide which comprises a waveguide substrate, an input diffraction optical element and an output diffraction optical element. Incident light is coupled into the waveguide substrate through the input diffractive optical element, and is coupled out of the waveguide substrate step by step through the output diffractive optical element after being totally reflected in the waveguide substrate; the input diffractive optical element and the output diffractive optical element are respectively and independently arranged to be of a periodic grating structure, and a grating of the output diffractive optical element is arranged to be an asymmetric surface relief grating. The grating tilt direction of the output diffractive optical element and at least one further grating structure parameter are modulated such that the diffraction efficiency of the output diffractive optical element towards the out-coupling side exceeds the diffraction efficiency away from the out-coupling side, and the diffraction efficiency towards the out-coupling side varies spatially. According to the invention, the inclined grating or blazed grating easy to process is used in the coupling-out area, and the optical performance of the diffraction optical waveguide is considered by modulating the grating parameters, so that the effects of effectively weakening light leakage and ensuring the privacy of a user are achieved.

An optical computing device includes: one or more light-diffraction elements each of which includes microcells, wherein each of the microcells has an individually set thickness or refractive index; and an optical signal input section that simultaneously inputs an optical signal and a delayed optical signal obtained by delaying the optical signal to the one or more light-diffraction elements.

An illuminated glass element, including a glass pane with a first surface, a second surface, and a side edge face extending therebetween. The glass pane is equipped with at least one light source, which is suitable for coupling light into the glass pane such that the light propagates in the glass pane, in particular by total reflection at the first surface and the second surface. The glass pane is provided with at least one light-scattering structure, which is suitable for coupling said light out of the glass pane via the first surface and / or via the second surface. The glass pane is also provided, in a peripheral edge region, at least in sections, with a light trap, which is suitable for reducing the emission of the light via the side edge face. The light trap is formed from a light-scattering or light-diffracting layer on the first surface and an opaque element on the second surface.

A method includes obtaining, using at least one under display camera, one or more first image frames associated with a first diffraction pattern and one or more second image frames associated with a second diffraction pattern. The first diffraction pattern and the second diffraction pattern are related through a transformation. The method also includes generating a first deblurred image using the one or more first image frames and a second deblurred image using the one or more second image frames. The method further includes combining the first and second deblurred images while exploiting complementary types of image artifacts created by the first and second diffraction patterns to generate an image of a scene.

The embodiment of the invention provides an exposure system for a wafer edge and a photomask contained in the exposure system. The photomask includes a frame, an opening surrounded by the frame, a phase inversion layer underlying the frame, and an intensity attenuation layer underlying the phase inversion layer. An inner sidewall of the phase inversion layer and an inner sidewall of the intensity attenuation layer are exposed to the opening. An inner sidewall of the phase inversion layer and an inner sidewall of the intensity attenuation layer extend beyond an inner sidewall of the frame in a first direction. According to the invention, the structure with optical phase inversion and intensity adjustment is used to improve the problem of light diffraction at the edge of the wafer.

The present invention relates to a wavelength multiplexing focusing control device and its implementation method, the device includes a voltage-adjustable optical resonant cavity, a first dielectric metasurface layer and a second dielectric metasurface layer; wherein the voltage-adjustable optical resonant cavity includes a glass substrate, a metal metasurface, a liquid crystal layer, a metal metasurface, and a glass substrate arranged in sequence, and different coding modes are formed by applying voltages in different regions of the optical resonant cavity; the metasurface layer includes a silicon micron column structure and a dielectric substrate, and a diffraction neural network is used to simulate the diffraction process of multi-wavelength incident light, and the phase distribution of the double-layer metasurface layer is calculated; the overall amplitude distribution of the liquid crystal layer is changed by dynamically adjusting the external voltage to achieve continuous scanning of the focus point position of the light beam. The problem that traditional focusing control devices are insufficient in control accuracy and response speed is solved, and the device of the present invention has the characteristics of flexible design, small size, easy integration, easy processing, etc., and provides a more efficient and flexible beam control method.