79 results about "Holography" patented technology

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.

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 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.

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 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.

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.

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.

The invention discloses a correlated light holographic system based on optical first-order characteristics, and belongs to the technical field of correlated light holography. The problems that an existing quantum system is very fragile, the result of the existing quantum system is easily influenced by environmental noise, interaction with the environment can cause de-coherence of an entangled state, and compared with an unenhanced classical situation, the quantum holographic technology achieved through polarization entanglement is reduced are solved. The holographic technology is realized by utilizing the first-order correlation characteristic of light, and is compared with the viewpoint that the holographic technology can only be realized through second-order correlation in the prior art; therefore, the resolution of a space image is improved, and imaging can be carried out through dynamic stray light, even in the presence of strong noise. Compared with a quantum strategy, the method has better robustness in the face of environmental interference, and has potential application value in the future.

The present invention discloses a system and method for implementing Fresnel incoherent correlation holography super-resolution microscopy using a multiplexed SLM. The system comprises a microscope module, a polarization module, a spatial light modulation module, a holographic detection module, and an image processing module. The microscope module uses a light source to illuminate a sample and collects the sample light. The polarization module includes a lens and a polarization unit to generate polarized sample light. The spatial light modulation module includes a spatial light modulator and a conversion unit to input the second modulated sample light into the holographic detection module. The holographic detection module includes a second quarter-wave plate, an imaging lens unit, and a polarization camera. The image processing module acquires and processes the polarized image set to produce a reconstructed image. This method maintains the integrity of the zone plate pattern, solves the problems of random errors and reduced image quality in existing Fresnel incoherent correlation holography technology, and improves the flexibility of the system.

This application proposes an encoding method for holographic computation. The method includes: classifying different types of curves based on the morphological distribution of etched lines; calculating the coordinates of discrete points on the etched lines; dividing the index intervals of different curves according to their feature points using Newton's iteration method; and fitting the arc by finding the optimal solution of the set of feature point coordinates that can be fitted using a bisection method. The curves are closed curves, spiral curves, or non-spiral curves. This encoding method significantly reduces the amount of data required for etched line coordinates, achieving encoding with a small data volume, and the calculation process is simple. High-precision encoding can be achieved by setting the encoding precision.

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

The invention relates to a method (100) for performing data processing, in particular a computational operation, using holography, wherein the method generates an output data from a predetermined input data of a plurality of possible input data by means of the data processing, in particular the computational operation. The invention further relates to a transparent display device (200, 201, 202) for generating a two-dimensional transparent pattern for use as an optical processing scheme (320, 321) and / or as a holographic filter, in particular a Fourier hologram (302, 303), in the aforementioned method.

The present application relates to a kind of rail transit space electromagnetic radiation monitoring method and system based on radio frequency holography, comprising: obtaining three-dimensional surface boundary data and converting into spatial geometry coordinate matrix flow, receiving probe array collected signal extraction as amplitude aliasing radio frequency signal stream and executing time domain alignment calibration;Call coordinate matrix flow to signal stream mirror image unfolding synthesis virtual holographic antenna receiving data stream;Parse doppler frequency domain disturbance and construct mask level, evaluate channel conversion law and generate trigger token signal;Based on token signal, virtual data stream is screened and intercepted, and coherent holographic receiving flow data is obtained;Joint matrix flow is approximated in reverse to the intercepted data, and space holographic complex tensor is generated, and dynamic hologram is output after three-dimensional digital grid reconstruction.The present application solves the problem of how to reconstruct three-dimensional space electromagnetic radiation field in dynamically changing environment with multi-path reflection characteristics using non-coherent probe array with more simplified hardware structure.

The present invention relates to the field of information encryption technology, and specifically discloses an information encryption device based on spiral fractional-order photon orbital angular momentum holography, comprising a light source module, a first modulation module, a 4f system, a reflector, a second modulation module, and an imaging module. The device realizes the use of spiral fractional-order orbital angular momentum patterns as independent information encoding channels to encrypt information, which supplements integer-order orbital angular momentum pattern channels, greatly increases information channels, and improves the information capacity and encryption security of optical holography.

The present invention discloses a nano-printing angle multiplexing method based on phase-type holography, comprising the following steps: S1, acquiring different target grayscale images and compensating the image intensities accordingly; S2, combining the object light amplitude distribution of the compensated grayscale images with a preset periodic phase distribution to form different object lights, and then interfering and superimposing each with a preset reference light to obtain a corresponding phase-type holographic phase distribution; S3, secondary encoding each phase-type holographic phase distribution into a selected multiplexing angle to obtain a final printing angle multiplexing phase distribution, where each multiplexing angle corresponds to an observation angle; S4, determining the angular arrangement of nanobricks based on the final printing angle multiplexing phase distribution. The present invention enables different observation angles to correspond to different images, enabling switching of displayed images by transforming information channels (i.e., transforming the observation angle).

The invention belongs to the technical field of image coding, and relates to a phase image coding method and system based on random vector optical complex coherence degree measurement. Phase information is loaded into a spatial distribution phase difference of an incoherent light source orthogonal complex electric field; constructing a cross-spectral density matrix function of the partially coherent vector light field by using a coding system; obtaining a plurality of orthogonal vector electric field mode bases based on a mode decomposition theory and a cross-spectral density matrix function of the partially coherent vector light field so as to obtain a plurality of modes of partially coherent vector light beams on a light source surface; measuring each vector mode of the partially coherent vector light beam from the interference light intensity by using an off-axis holographic technology, and constructing an orthogonal polarization field of the partially coherent vector light beam of each mode; full-dimensional complex coherence degree information is obtained based on an orthogonal polarization field of a partially coherent vector light beam, so that phase information is recovered by utilizing a decoding system, and image coding and complex coherence degree full-dimensional measurement based on vector partially coherent light are realized.

To address the limitation of existing methods in achieving transparency within the visible spectrum, this invention provides a metasurface unit for full-space millimeter-wave frequency multiplexing holography based on a complex amplitude metasurface. This unit comprises three metal layers and two transparent substrates, arranged from top to bottom as a first metal layer, a first transparent substrate, a second metal layer, a second transparent substrate, and a third metal layer. A full-space millimeter-wave frequency multiplexing holographic device based on a complex amplitude metasurface is also provided. Furthermore, a method for full-space millimeter-wave frequency multiplexing holography based on a complex amplitude metasurface is provided. This invention's method enables efficient and reliable design of frequency multiplexing metasurface holograms.

The invention relates to the field of optical holography, in particular to a holographic metasurface design method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: providing a preset superatom library, wherein the preset superatom library comprises phases and transmissivity responses of superatoms with different sizes under different wavelengths; randomly generating an initial metasurface, wherein the initial metasurface comprises a plurality of super atoms; providing a target image, and obtaining a reconstructed image corresponding to the target image according to the initial metasurface and a preset superatom library; obtaining a total loss function of the target image and the reconstructed image; and adjusting the superatom size of each superatom until the total loss function meets a set condition, designing a metasurface according to the final superatom size, and designing the metasurface according to the final superatom size. According to the holographic metasurface design method and device, the electronic equipment and the computer readable storage medium provided by the invention, the technical effects of improving the metasurface design efficiency and reducing the metasurface design cost can be achieved.

A method of using computer-generated holography to determine a corrective lens prescription comprises computing a hologram of an image. An aberration phase map is computed using a set of Zernike pol

The invention relates to a ghost imaging method based on computer-generated holography, a computing device and a readable storage medium, and the method comprises the steps: constructing a matrix on an object plane, further generating a corresponding positive and negative matrix set, generating a holographic phase diagram corresponding to the positive and negative matrix set on a light source plane through a computer-generated holography technology, and obtaining sets # imgabs0 # and # imgabs1 #, # imgabs2 #, # imgabs3 # and # imgabs4 #; each holographic phase diagram in # imgabs2 # and # imgabs3 # is loaded into a spatial light modulator to serve as an illumination speckle to be projected to the plane of an object to be measured, the total light intensity of each illumination speckle after transmission or reflection is received by a barrel detector, and a set # imgabs4 # and # imgabs5 # formed by signals received by the barrel detector is obtained; the real light intensity distribution # imgabs8 # and # imgabs9 # formed when each holographic phase diagram in # imgabs6 # and # imgabs7 # is propagated to an object plane is calculated by using a Fresnel diffraction formula, a set # imgabs10 # and a set # imgabs11 # are obtained, and finally, a high-resolution image of an object to be measured is reconstructed by using # imgabs12 #, # imgabs13 #, # imgabs14 # and # imgabs15 # in combination with a second-order correlation function. The imaging resolution can be improved under the condition that the imaging system is not changed, and the method has wider applicability.