105 results about "Holography" patented technology

The invention relates to the technical field of electronic manufacturing quality detection, and discloses a multilayer circuit board quality detection method and system, and the method comprises the steps: collecting the surface interference fringe data of a circuit board through a computer-generated holography technology, and reconstructing the three-dimensional position of an alignment mark; internal stress distribution is detected through a photoacoustic coupling system, and a three-dimensional stress tensor field is reconstructed; establishing a PCB deformation dynamic model by using a multi-layer time sequence deep learning network; establishing a stress deformation correlation model through a physical information graph neural network; realizing feed-forward compensation and process optimization according to a dynamic prediction result; according to the method, computer-generated holography, photoacoustic imaging and deep learning technologies are integrated, the registration precision and internal stress distribution of the multilayer circuit board can be detected in a lossless and high-precision mode, the dynamic change trend of the multilayer circuit board can be predicted, active compensation and process optimization are achieved, and the product quality and the manufacturing yield are effectively improved.

The invention discloses a phase recovery method based on non-interference coding aperture holography, and belongs to the field of computational optical imaging. According to the technology, phase information of an object is directly extracted from a single hologram through a physically-driven numerical optimization framework in combination with Wiener inverse filtering and an improved G-S (Gerchberg-Saxton) algorithm. A frequency domain inverse filter is constructed based on system modeling of a point diffusion hologram, noise interference is effectively suppressed, meanwhile, a historical gradient acceleration strategy is provided, a convergence path is optimized by dynamically adjusting an iteration step length, and the calculation efficiency is improved. The technology has the core advantages that the limitation of a traditional interference light path is broken through, precise optical alignment or multi-time out-of-focus surface data acquisition is not needed, the system architecture is simplified, the environmental adaptability is enhanced, and quantitative phase distribution reconstruction of transparent and weak scattering samples can be realized through single exposure.

The invention discloses a building engineering drawing and model integrated interaction system and method, and the method comprises the steps: carrying out the semantic association of a drawing and a model, generating a dynamic index, enabling a constructor to input a natural language instruction, and enabling the constructor to synchronously locate an index region and an index component corresponding to the natural language instruction in the drawing and the model, the drawing and the model of the corresponding index area are subjected to holographic projection synchronously, and the corresponding index component is highlighted, so that the information acquisition efficiency and accuracy are improved, the time cost of switching between the drawing and the model is reduced, and the construction efficiency is improved; furthermore, through comparative analysis of the drawings and the models, collision conflicts can be detected, an optimization scheme can be generated, construction errors of the drawings and the models are effectively reduced, meanwhile, change records and communication information of the drawings and the models are synchronously stored and updated, the accuracy of obtained information can be ensured, and therefore the interaction reliability of the drawings and the models is improved.

The invention belongs to the technical field of micro-nano optics, and discloses an on-chip metasurface and a multi-dimensional multiplexing holographic method based on the on-chip metasurface. Firstly, a unit structure of the on-chip metasurface is constructed, the unit structure comprises a substrate layer, an optical waveguide layer and a nanometer structure layer which are sequentially arranged from bottom to top, and the nanometer structure layer comprises a nanometer brick of a rectangular structure; a plurality of nano bricks with the same size contained in the on-chip metasurface form a nano brick array; and then according to a plurality of set target holographic images, the arrangement of the position and the corner of each nano brick in the nano brick array is obtained by using the combined coding of the circuitous phase and the geometric phase, a final on-chip metasurface is obtained after the arrangement is completed, and the three-dimensional multiplexing holography of the incident angle, the wavelength and the polarization is realized by using the on-chip metasurface. According to the invention, not only is the limitation of incidence in the orthogonal direction overcome, but also the information storage capacity and the information security are remarkably improved.

The invention discloses a design method and application of an on-chip integrated metasurface with respect to angle multiplexing, which breaks through the traditional multiplexing in the orthogonal x and y directions by exploring and utilizing the direction dependence of circuitous phase manipulation driven by guided waves; by optimizing and introducing roundabout phase responses of other angles, for all pre-designed beam incident angles, different images can be independently coded on different z planes by combining the characteristics of a Fresnel region multilayer z plane, and on-chip total space 3D holography is demonstrated by using a conjugate relationship of optical responses driven by opposite on-chip illumination. A plurality of holographic images can be observed in the whole space. According to the method, a plurality of angles are introduced through calculation optimization, the optical information storage density is greatly improved, the holographic quality represented by the angle multiplexing holography has low background noise and crosstalk, and it is indicated that the method has wide application prospects in the fields of data storage, 3D display and the like.

The invention discloses a design method for realizing a virtual polarization element, relates to the field of optical device design, and aims to solve the problems of large size, difficulty in integration and limited regulation and control capability of a traditional polarization device. According to the method, a virtual polarization function (including a Jones matrix and an additional phase) is preset on a target plane, a plane wave weighting factor is solved through high-dimensional Fourier transform, and source plane light field distribution is generated through superposition. The metasurface is used as a platform, and accurate mapping from a source plane Jones matrix to a device structure is realized by adjusting geometric parameters of a nanostructure and combining a double-matrix holography. According to the design scheme, a polarization state with controllable spatial distribution can be generated as required in a two-dimensional plane at any propagation distance, and additional phase information can be flexibly superposed, so that the flexibility, precision and integration capability of light field regulation and control are remarkably improved, and technical support is provided for applications such as new-generation lens-free imaging, polarization coding communication, light field synthesis and the like.

The invention provides a metasurface-based method for performing effective phase encoding on incident light at any space angle, and belongs to the technical field of micro-nano optics and integrated photonics. According to the invention, the metasurface atomic displacement is associated with any predefined angle of the space incident light, and the gradient descent algorithm is adopted to optimize the phase matrix, so that effective phase coding in the whole angle space is realized. As a concept verification, the invention shows an omnidirectional angle multiplexing super-structure holography for any space light incidence, successfully realizes an augmented reality holographic image with as many as 22 channels, and proves that meaningful phase coding is realized by any incident angle degree of freedom, and the holographic image has the advantage of high signal-to-noise ratio. The arbitrary full-angle multiplexing holography shows good application potential in practical application aspects such as data storage, virtual / augmented reality and optical encryption.

A digital twin holography monitoring and self-healing system for wind turbines, characterized by the fact that it comprises sequentially connected components: a physical plane, including the body of the wind turbines (1), the multi-source sensor network deployed on it and the execution device; a data acquisition and transmission layer for acquiring and transmitting data from the aforementioned multi-source sensor network; Digital twin model layer for creating and running virtual twins that are synchronized with the physical entity layer, including geometric models, physical models, behavioral models, rule models, and data model fusion modules; Holographic monitoring and diagnostic layers for visualizing plant condition, health assessment, fault prediction, and diagnosis based on the digital twin layer; and A fault self-healing regulation layer serves to independently generate and execute regulation strategies based on diagnostic results, which are returned to the execution organization of the physical entity layer.

The invention relates to the technical field of chaotic cryptography, image encryption and information security, in particular to a multi-image encryption algorithm based on a hyper-chaotic system and computer-generated holography, which comprises the following steps: S1, generating a pseudo-random sequence for encryption by using the hyper-chaotic system; s2, preprocessing the original image based on computer-generated holography; s3, combining the generated pseudo-random sequence with the preprocessed image to realize image encryption; s4, through decryption operation corresponding to the encryption process, the original image is restored after the correct secret key is input; and S5, the decryption operation comprises inverse transformation and reconstruction operation on the encrypted image. The algorithm comprises an image preprocessing module, a hyperchaotic system module, a compressed sensing coding module, a computer-generated holographic encryption module, a decryption module and a post-processing module, the security of sensitive image data in the transmission and storage process can be ensured, and efficient and reliable guarantee is provided for sensitive image encryption in various fields.

The invention discloses an underwater polarization imaging device and method based on interference-free coded aperture correlation holography, and belongs to the field of computational optical imaging. According to the technical scheme, on the basis of an interference-free coded aperture correlation holographic system, two light paths are utilized, a target object hologram and a point spread function are synchronously collected through cross-polarization double light paths (0 degree and 90 degrees), after target information light is separated out through an underwater polarization imaging model, low-frequency background noise is filtered out through a nonlinear filtering reconstruction algorithm, and the target object hologram and the point spread function are obtained. And the phase-coded high-frequency object structure information is reserved, and the global estimation precision is optimized. According to the method, a complex optical path of traditional polarization imaging is simplified, the influence of local noise on polarization parameters is avoided, the image definition and the signal-to-noise ratio in a turbid underwater environment can be effectively improved, and the method is suitable for high-scattering scenes such as marine resource exploration, underwater robot navigation and military underwater target detection.

The invention provides a professional influence evaluation and dynamic deduction method and system based on a knowledge graph and a storage medium. The method comprises the steps of 1, constructing a structured knowledge set representing entities and relationships in a professional field; 2, calculating a global influence absolute score of a target entity based on the structured knowledge set in the step 1; step 3, based on the global influence absolute score in the step 2, performing context-aware context influence analysis; and 4, performing prospective influence deduction based on disturbance simulation of the structured knowledge set in the step 1. The method has the beneficial effects that 1, the holography and objectivity of an evaluation basis are realized, and the credibility and fairness of an evaluation result are fundamentally improved; 2, a uniform and data-driven evaluation scale is established, and cross-organization and cross-region fair benchmarking is realized for the first time; and 3, a context-aware multi-level analysis capability is provided, so that the evaluation has unprecedented depth and fineness.

Multi-sensor radar microDoppler holography is described. An example of a method includes performing a 2D Fourier transform calculation for multiple sets of raw Radar sensor data to generate Doppler spatial frequency map data, the raw sensor data including at least a first set of raw sensor data associated with a first Radar sensor at a first location and a second set of raw sensor data associated with a second Radar sensor at a second, different location; performing a DWT calculation of the Doppler spatial frequency map data; applying phase compensation to generate phase compensated data transforms; adding the phase compensated data transforms to generate a sum; performing an inverse 2D Fourier transform calculation to generate a transform result; and extracting microDoppler information and Doppler information extraction from the transform result.

The invention discloses a composite film with a dynamic optical anti-counterfeiting function, which belongs to the technical field of optical anti-counterfeiting, and comprises a base material layer, a release layer, an imaging layer, a plating layer, a dynamic optical function layer, a protective layer and an adhesive layer which are sequentially laminated, the imaging layer is provided with a static holographic pattern formed by compression molding; the dynamic optical functional layer comprises a photo-thermal response type semi-crystalline polymer and near-infrared absorption dye dispersed in the photo-thermal response type semi-crystalline polymer, has a three-dimensional cross-linked network structure formed by ultraviolet curing, and can generate a dynamic anti-counterfeiting effect by triggering reversible phase change through irradiation of laser with set wavelength. The invention also discloses a preparation method of the composite film. Through integration of dual anti-counterfeiting mechanisms of static holography and dynamic response, the comprehensive requirements of high safety, low cost, easy verification and environmental adaptability are met, and the method is particularly suitable for high-end anti-counterfeiting application which needs to be embedded into a card through a lamination process.

The invention discloses an information storage device and method based on fractional orbital angular momentum multiplexing holography, and relates to the technical field of holography. According to the method, arbitrary conversion from the fractional orbital angular momentum to the integer orbital angular momentum is combined with traditional integer orbital angular momentum holography, and fractional orbital angular momentum multiplexing holography is achieved. The topological charge interval of the adjacent channels can be less than 1, so that the capacity is improved; the decoding process is jointly encrypted by the fractional topological charge and the conversion process, so that the confidentiality is enhanced; during demultiplexing, a target channel forms a Gaussian light spot on a receiving surface, a non-target channel forms stray light on the receiving surface, crosstalk between the target channel and the non-target channel is low, and fidelity is improved.

According to the vector vortex beam generation method applied to the SERF magnetic field measurement device, a vector vortex beam is generated according to a light field distribution formula of the vortex beam in combination with a computer-generated holography method and a polarization mode decomposition method, then iterative optimization is carried out on parameters such as the phase, the amplitude and the polarization direction in the beam in a global NSGA-II algorithm and local SPGD algorithm combination mode, and finally the vector vortex beam is generated. And then judging whether the electron steady-state polarizability uniformity meets the expectation or not, if so, ending the optimization, taking the optimized light beam as a pumping light beam to pump alkali metal atoms, and carrying out subsequent magnetic field measurement, and if not, changing parameters and continuing optimization until the electron steady-state polarizability uniformity meets the expectation. Compared with a traditional Gaussian beam, the atomic polarizability in the air chamber is stabilized at a required value, the atomic spin gradient field of the device is effectively inhibited, the differential performance of the device is enhanced, and the sensitivity of the SERF magnetic field measurement device is improved.

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 decorative foil (100) infusing partial metallized holography with printing design is disclosed A carrier film provides a structural support. A release layer (130) positioned beneath the carrier film by a coating process. A protection layer (140) is coated by a coating process. A replication layer (150) positioned below the protection layer. The replication layer accepts and retains an optical image for creating a hologram. A reflection layer is positioned below the replication layer. A masking layer (170) placed beneath a reflection layer (160) to protect holographic image. A bonding layer (180) positioned below the masking layer. A printing layer (190) applied over a partially metalized film layer positioned beneath the bonding layer. A plurality of colored layers (200) positioned beneath the printing layer. A primer layer (210) positioned beneath the plurality of colored layers. An adhesive layer (220) to affix a detachable transfer layer assembly (120) onto a substrate.

The present invention relates to a system for replicating an object in holography, comprising: means for irradiating the object with a beam at a set angle of incidence; means for adapting an extent of the beam before the beam is incident on the object, based at least in part on the set angle of incidence. Furthermore, the invention relates to a corresponding device and method and a corresponding computer program.

Automated holography using WiFi radiation may be triggered by an event such as a shooting, weather event, fire, or mass casualty. A method begins with sensors detecting a triggering event. The sensors may be mounted on access points, buildings, or other nearby structures. The sensors may be of different types, including aural sensors for detecting noises, such as gunshots, visual sensors, vibration sensors, and the like. The sensors then contact nodes within a predetermined distance of the triggering event using a network router. Additional nodes may include other access nodes within the predetermined distance, relays, repeaters, other network routers, and user devices. After contacting the applicable nodes, automatic mapping of an interior of the location of the triggering event is performed using WiFi radiation. The interior mapping of the location of the triggering event is then transmitted to at least one emergency service.

The invention discloses a visible light dual-wavelength polarization multiplexing metasurface hologram and a preparation method thereof, and relates to the technical field of micro-nano manufacturing. The super-surface hologram is composed of a super-atom array based on a nanoimprint technology, wherein the period of the super-atom array in the x direction and the period of the super-atom array in the y direction are 450 nm, and the height of the super-atom array is 800 nm. In the superatom array, all superatoms are of cuboid columnar structures, and a main body is composed of a polymer doped with titanium dioxide nanoparticles; the size and the position of each super atom are determined according to a GS algorithm; the GS algorithm is used for calculating the phase information of the target image under the polarized light with the corresponding wavelength; the wavelength polarized light comprises X polarized light of 532 nm and Y polarized light of 671 nm. According to the method, the problems of long manufacturing process period, small scale, high cost and the like of a traditional metasurface device can be solved, and a new development thought is provided for a multi-color imaging technology based on metasurface holography.

The holographic hot stamping film molding press comprises a coating box, a pressure-resistant plate and a plurality of mold pressing rollers, the pressure-resistant plate is arranged at the bottom of the coating box, the mold pressing rollers are arranged at the top of the pressure-resistant plate respectively, side plates are fixedly installed on the two sides of the coating box, a containing box is arranged in the pressure-resistant plate, and the containing box is arranged in the containing box. A collecting box is movably installed in the containing box, a coating plate is arranged in the coating box, two vertical plates are arranged at the bottom of the coating plate, and through the arrangement of the side plates, the containing box, the vertical plates, a supporting shaft, an inclined plate and a guiding and conveying pipe, scraped coating flows to the surface of the inclined plate through a groove formed in the coating plate; the vertical plate and the inclined plate are connected through the supporting shaft, bubbles can be discharged easily, the defects caused by the unsmooth surface of the coating are avoided, the coating recycling quality is improved, and the coating is guided to the position of the flow guide groove along the inclined plate and finally flows into the collecting box along the guide pipe to be collected.

This invention proposes a zoom microprojector based on metasurface holography, comprising a laser, a transmissive metasurface, and an electrowetting liquid lens. To achieve system miniaturization, the transmissive metasurface and the electrowetting liquid lens are integrated into a single cavity, with the electrowetting liquid lens located behind the transmissive metasurface. During the metasurface fabrication process, a 3D Fourier transform algorithm is proposed to generate a 3D metasurface hologram, thereby fabricating the transmissive metasurface. The liquid lens is a small-aperture liquid lens designed based on the electrowetting principle to cooperate with the transmissive metasurface to achieve zoom microprojection. When the laser emitted from the laser illuminates the transmissive metasurface, the 3D image diffracted by the metasurface passes through the electrowetting liquid lens. The position and size of the 3D image can be adjusted according to the voltage of the liquid lens, thus achieving a 3D zoom projection effect.

An apparatus and method are introduced to produce a hologram of an object from electromagnetic radiation, such as incoherent light, received from the object. The electromagnetic radiation is received by a receiving assembly and transformed into a plurality of co-linear co-propagating beams with different focal distances. The interference of the plurality of beams is enabled by projecting components of each beam along a common polarization direction. The interference patterns thus formed are recorded and then processed to form the hologram of the object.

The invention discloses an absolute calibration method for an interferometer with spherical output wavefront. An interferometer, a spherical standard lens, a computer-generated hologram and a plane mirror are included. Firstly, the computer-generated holography works in a spherical mode a, the computer-generated holography is placed in and out of focus positions of an interferometer for measurement, and then the computer-generated holography is rotated by 180 degrees for measurement; after the four steps of measurement are completed, the computer-generated holography works in a spherical mode b, the computer-generated holography is placed in and out of focus positions of the interferometer for measurement, and then the computer-generated holography is rotated by 180 degrees for measurement; then the plane mirror is placed at the cat eye position for measurement; according to computer-generated hologram manufacturing error characteristics, through the nine times of measurement, all errors in measurement results are decoupled, computer-generated hologram manufacturing errors including substrate errors, pattern distortion errors and etching depth errors are removed, interferometer system errors are obtained, and absolute calibration of the interferometer system errors is completed; the method is ingenious in design, high in precision and high in engineering application value.

The invention discloses a cooperative control method and system based on space-time holography and neural reasoning. The cooperative control method and system are applied to an optical cable embedded optical fiber wireless heterogeneous communication scene. According to the method, a system comprising a central server / gateway, a weak coupling multi-core fiber backbone network and a distributed micro-nano node group is constructed, node construction updates a space-time hologram and deduces average field statistics, group collaborative optimization is realized based on an average field game and a neural network, individual decision is completed through neural active reasoning, and closed-loop collaborative control is formed. The method solves the contradiction of energy uncertainty, computing power dimension disaster and perception-decision splitting in the prior art, improves the network survival time, the cooperation efficiency, the data quality and the environment robustness, and is suitable for high-precision perception scenes such as intelligent power grids and long-distance pipelines.

The application relates to the field of micro-nano optical technology, and particularly discloses a wafer-on-chip waveguide and super-structure surface integrated device for realizing arbitrary polarization holography, which comprises a super-structure surface, a waveguide and a substrate arranged in sequence from top to bottom; a complete unit of the super-structure surface comprises four nano pillars arranged on the waveguide; the nano pillars have anisotropic structures and have fixed relative positions in one unit; the nano pillars in the same row of one unit have perpendicular rotation angles; the nano pillars can extract light waves from the waveguide, the light waves extracted by the four nano pillars in the same unit interfere with each other to form scattered light with specific amplitude, phase and polarization; by changing the size and rotation angle of the nano pillars, sudden phase, geometric phase and detour phase of the fixed distance between the nano pillars can be utilized to realize holographic images with arbitrary polarization states.

Directing a holographic wavefront along a first plane to an input side of an optical assembly 600 the wavefront is divided into first and second portions; each portion is re-routed in separate directi

The invention discloses an image reconstruction method and imaging system based on multimode fiber holography and polarization coding, and the method comprises the following steps: S1, outputting a laser light source, eliminating the reflected light through an isolator, and carrying out the light beam expansion through a first lens and a second lens; s2, dividing the expanded light beam into a reference arm and a signal arm by using an optical splitter; s3, in the signal arm, generating a hologram containing spatial position information through a DMD, dynamically switching polarization states through an optical relay device, and forming holographic light field distribution of different polarization states in a three-dimensional space; s4, the modulated multi-polarized light field is coupled through a microscope objective to enter a multimode optical fiber; s5, the optical fiber output end forms a speckle pattern carrying polarization information through the achromatic lens group; and S6, collecting a speckle pattern through a camera, and realizing holographic image reconstruction by adopting a U-Net neural network. According to the invention, high-fidelity image transmission and reconstruction in the multimode optical fiber are realized.

An image matching device 100 according to the present disclosure comprises: an acquisition unit 121 that acquires a hologram to be matched, the hologram being obtained by photographing, through holography, an object to be matched; and a matching unit 122 that matches the hologram to be matched with a registered hologram, which is a hologram that was registered in advance.

The invention relates to the field of photonic crystal manufacturing, in particular to a multi-beam laser holography complex period photonic crystal manufacturing system and method, and the system is provided with a laser, a multi-beam generation element, a beam collimation element, a displacement table, a spatial light modulator, a focusing lens, a photoresist plate, a multi-axis displacement table and an upper computer. The upper computer is used for controlling the displacement table, the spatial light modulator and the multi-axis displacement table, laser is emitted from the laser device and passes through the multi-beam generation element in the normal direction to generate multiple beams of coherent light, the multiple beams of coherent light are collimated into parallel light through the beam collimation element, and the parallel light is transmitted to the spatial light modulator through the multi-axis displacement table. A spatial light modulator is controlled by an upper computer to change the phase and polarization state of each parallel light beam, and then each parallel light beam is converged to a photoresist plate through a focusing lens. The large-area complex period photonic crystal can be repeatedly prepared on a large scale under modularization, high integration and fine control, and the method plays an important role in the optical fields of optical integration, optical communication and the like.