246 results about "Light diffraction" patented technology

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.

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.

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

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.

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.

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.

The invention relates to the technical field of metering characterized by adopting an optical method, solves the problem that measurement results are unstable and inaccurate due to the fact that measurement of absolute positions in the prior art is easy to interfere, and provides a measurement system and a measurement method based on light interference. The optical path maintaining device guides the initial light beam to the light diffraction device and guides the diffraction pattern generated by the light diffraction device to the light capturing device, and the diffraction pattern is obtained by modulating the initial light beam through the light diffraction device, so that the diffraction pattern contains specific coding information, and interference caused by subsequent environmental noise can be reduced. The light capturing device collects diffraction patterns and sends generated interference image signals to the calculation control device, due to the fact that the diffraction patterns corresponding to different position information are different, the generated interference image signals are different, and based on a pre-established image displacement model, the position information of the light capturing device is calculated. And the calculation control device processes the interference image signal to obtain a more accurate displacement measurement result.

A light diffraction element unit includes an optically-transparent substrate; a light diffraction element disposed on a main surface of the optically-transparent substrate; and a three-dimensional alignment mark disposed on the main surface in a vicinity of the light diffraction element and having a thickness greater than a thickness of the light diffraction element.

An optical computing system includes: an intensity modulation device group including at least two intensity modulation devices, each of which includes modulation cells, wherein each of the modulation cells of each of the intensity modulation devices carries out intensity modulation with respect to carrier light in accordance with one of signals to generate a signal light beam, and each of the signals corresponds to each of the intensity modulation devices; and a light diffraction element including diffraction cells having respective thicknesses or refractive indices set independently of each other, wherein each of the diffraction cells receives the signal light beam from each of the modulation cells of each of the intensity modulation devices corresponding to each of the diffraction cells, and by causing signal light beams to have respective different optical path lengths to the light diffraction element, the signal light beams have respective different phases.

The invention provides an angular spectrum laminated on-chip microscopic imaging system and method, and the method comprises the steps: respectively filtering and intercepting diffraction object light in different angular spectrum intervals through an angular spectrum filter, carrying out the optical coding, and collecting an object light diffraction image formed by the coding of the corresponding angular spectrum interval on an image sensor; and the synthetic angular spectrum information of the object is decoded through an angular spectrum lamination iterative algorithm, and finally, large-view-field and high-resolution object amplitude and phase distribution which are not constrained by the aperture of the imaging system are reconstructed.

The invention discloses an electro-dimming thin film with a composite grating structure. The electro-dimming thin film comprises a lower substrate, a plane dimming layer, a grating dimming layer and an upper substrate which are sequentially arranged from bottom to top. The plane dimming layer comprises a lower plane transparent electrode, a dye liquid crystal and an upper plane transparent electrode, and a flexible filler and a lower transparent spacer are arranged between the lower substrate and the plane dimming layer; the grating dimming layer comprises at least one level of grating structure, each level of grating structure is provided with a grating lower electrode, a grating liquid crystal and a grating upper electrode which are independently controlled, an isolating layer is arranged between every two adjacent electrodes, and the grating structures are filled with grating layer flexible filler. The electro-dimming thin film with the composite grating structure has the beneficial effects that the electro-dimming thin film with the composite grating structure realizes multi-dimensional regulation and control from basic shading to accurate light diffraction through layered design and multi-stage control, and has remarkable application value in the fields of intelligent glass, display equipment and the like.

The invention discloses an extreme ultraviolet spectrograph calibration method based on extreme ultraviolet diffraction, and relates to the technical field of spectrograph calibration, and the technical scheme is characterized in that a desktop type XUV light source generation device is used for generating XUV light beams; a diffraction device is arranged on the propagation path of the XUV light beam, so that the XUV light beam is diffracted; taking the FID spectral line of the helium atom 2p-1s as an energy reference point, and deducing part of unknown parameters of the diffraction device and the spectrometer according to the separation distance of + / -1 level diffraction beams measured at the position corresponding to the energy; in combination with a Gaussian fitting method, the positions of 0-level light beams and + / -1-level diffraction light beams at other positions on the detector are obtained, and according to a diffraction formula, energy corresponding to all positions on the XUV spectrometer is inverted; calibration precision is ensured by correcting copper mesh placement angle deviation and CCD image angle deviation. According to the invention, XUV light is diffracted by using the copper net, and global continuous calibration of the energy axis of the spectrometer is realized by combining with a characteristic spectral line with a known wavelength.