48 results about "Holography" patented technology

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 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.

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.

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 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.

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.

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 present application relates to the field of structured light three-dimensional measurement technology, and particularly relates to a method for reconstructing and improving least square iterative phase unwrapping based on four-step phase shifting. An object light field is obtained on an imaging plane after a lens in a holography process; four reference light fields are generated by changing the phase of the reference light to interfere with the object light field, four-step phase shifting holograms are obtained, and an arctangent calculation is performed to obtain a wrapped phase map; a discrete Poisson equation of the wrapped phase map is established according to the least square method, and iterative solving is performed to obtain the real phase of the wrapped phase map. The unwrapping algorithm of the present application is optimized by the least square method multiple iterations, so that the partial derivative of the real phase and the difference value of the wrapped phase difference are minimized, the unwrapping error under noise is effectively reduced, and the Poisson equation is introduced for iterative solving, so that the quality of phase unwrapping is improved, and the robustness of the algorithm is improved.

The invention discloses a terahertz metasurface polarization coding encryption method based on angular spectrum modulation, and belongs to the technical field of information encryption. In the encryption method, to-be-encrypted information is mapped to an optical transfer function of a metasurface, so that an angular spectrum of an input plaintext image is modulated under specific linearly polarized light, and then a ciphertext image is generated through inverse Fourier transform. During decryption, Fourier transform is carried out on a ciphertext image obtained under a correct polarization condition, and information is recovered through angular spectrum difference analysis. According to the method, an optical 4f system can be used as a framework, a terahertz metasurface composed of rotating rectangular hole structure units is used as an angular spectrum modulator, and 2-bit information coding is achieved through different arrangement strategies of the metasurface. According to the method, a direct mapping strategy is adopted, the method does not need to depend on a complex iterative optimization algorithm like traditional metasurface holography, the design process is simplified, decoupling of encrypted data and physical hardware is achieved, and system flexibility and digital compatibility are improved. Meanwhile, the method is combined with a specific polarization observation and coding mechanism, so that the information security is further enhanced. The invention provides an effective solution for information encryption and anti-counterfeiting of the terahertz wave band.

The utility model relates to the technical field of displays, and provides a touch display with a rotary lamp effect, which comprises a touch screen and a liquid crystal display, the liquid crystal display is arranged in the touch screen, rotary lamp tubes are arranged on two sides of the touch screen, each rotary lamp tube consists of a rotary motor mechanism, an LED (light-emitting diode) lamp strip and a transparent protective tube, and a metal plate structural member is arranged on the back of the touch screen. Based on the visual persistence effect, the rotary lamp tube is almost transparent but can display dynamic images after rotating at a high speed, a unique visual effect like holography is created on the touch display, unprecedented immersive experience is brought to a user, and attraction and interestingness of display content in the entertainment industry are greatly improved; by accurately controlling the turning-on and turning-off time of the high-brightness LED lamps on the LED lamp strips, complete 2D and 3D image contents can be presented on the rotary cylindrical surface, so that animation playing, holographic pattern displaying and various wonderful patterns can be easily realized, and diversified content display requirements are met.

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 present disclosure relates to a scanning holography-based substrate alignment apparatus and method, wherein the apparatus includes: a sample fixing unit including a plurality of holders configured to support substrates at different positions by fixing each of the substrates at both ends thereof, each of the substrates including a substrate and a chip; a sample transfer unit configured to move the substrates at the different positions supported by the plurality of holders to a specific position; a holographic information receiving unit configured to receive holographic information about the substrates at the different positions from a holographic optical apparatus; a substrate position determination unit configured to analyze the holographic information through a holographic signal processing apparatus to determine position information for the substrates at the different positions; and a substrate position re-aligning unit configured to re-align the substrates at the different positions using the position information.

The invention belongs to the technical field of laser processing, and particularly relates to a method for processing computer-generated holography based on femtosecond laser, which comprises the following steps of: 1, designing a CGH pattern which is adaptive to femtosecond laser and is processed on a quartz glass substrate according to an optical detection requirement; 2, processing parameters of a femtosecond laser are set, and lattice damage and thermal distortion of the quartz glass substrate are reduced through the non-thermal processing characteristic of the femtosecond laser; according to the method, the non-thermal processing characteristic of femtosecond laser is adopted, a mask photoetching step necessary for a traditional process is omitted, processing characteristic constraint and substrate error compensation during CGH pattern design are combined, and real-time deviation compensation of a high-precision online confocal sensor is matched, so that the problems of environmental pollution caused by traditional reactive ion etching and structure falling caused by physical vapor deposition are solved, and the quality of the product is improved. And the problems of long processing period and insufficient precision caused by thermal damage are solved, and high-efficiency and high-precision processing of the CGH on the quartz glass substrate is realized.

The application discloses a kind of equipment failure early warning detection methods based on digital radar holography scanning, it is related to the technical field of failure early warning, including, the abnormal propagation direction and parameter relationship transmission characteristics between the analysis secondary abnormal distribution set and primary abnormal distribution set, form abnormal evolution chain, extract abnormal structure mode of abnormal evolution chain by structure analysis, and execute fault fitting processing, generate multidimensional fault fitting set;Estimate the abnormal evolution trend of multidimensional fault fitting set, generate operation risk index set, execute abnormal evolution consistency determination to operation risk index set, generate failure early warning result set.The application deduces and constructs abnormal evolution chain by counterfactual state, realizes the explicit modeling to equipment "normal operation relationship mode", makes abnormal change from "discrete identification" to "structured evolution analysis", improves failure early warning foresight and reliability.

This invention relates to a method, apparatus, and operation method for generating orbital angular momentum images based on light scattering in the field of holographic projection technology. The image generation method includes: based on a target image and a transfer matrix... t Build K The first scattering hologram; in the first... k The vortex phase is superimposed on the scattering hologram to obtain the th scattering hologram. k A scattering hologram with OAM selectivity; K The scattering holograms of the individual OAM channels are linearly superimposed to obtain the scattering hologram of the OAM multiplexed channel. H Mul ; Scattering hologram of vortex beam multiplexed by OAM H Mul The projected image is obtained after passing through the scattering medium. This invention changes the encoding method of OAM holography from OAM-based spatial-frequency domain transformation to matrix operations based on the scattering medium transmission matrix, breaking the limitation of traditional OAM holographic resolution being limited by the highest-order OAM mode, thereby enabling the generation of high-capacity, super-resolution OAM holographic projection images.

The invention relates to a method (100) for carrying out a computing operation by means of holography, wherein in the method, an output data item is generated, by means of the computing operation, from a specified input data item of a multiplicity of possible input data items. The invention also 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 application discloses a method for simultaneously realizing color nano printing and color holography and a metasurface, and the method comprises the following steps: constructing a nano brick array; obtaining a color nano printing image, determining the long axis and the short axis of the nano brick in the nano brick structure unit at each position according to the color presented by the nano brick structure unit with different size parameters; obtaining a color holographic image, and determining the turning angle of the nano brick in the nano brick structure unit at each position; arranging the nano brick structure unit with the corresponding size at each position according to the corresponding nano brick turning angle determined above, and obtaining the required metasurface; and incident white light on the metasurface, and the reflected light forms a color nano printing image on the metasurface; and incident circularly polarized light with wavelengths of λ R , λ G , λ B on the metasurface, and a color holographic image is displayed on the design distance plane. The application can realize the display multiplexing of the color nano printing image and the color holographic image simultaneously by using one metasurface, and the information storage density is high.

This invention discloses a multi-dimensional joint control method for electromagnetic beams based on anisotropic holographic metasurfaces. It aims to address the shortcomings of existing multi-beam multi-dimensional control capabilities and the problems of inter-beam coupling and interference. The method includes: 1) constructing a target field according to the requirements of the actual application scenario, selecting a feed source, and determining its excitation reference field; 2) calculating the metasurface impedance components using tensor holography theory based on the target field and reference field to complete the physical structure design; 3) introducing a fully polarized modulation matrix into the target field expression and adding power allocation coefficients for beams of different polarizations to achieve joint control of arbitrary polarization and different energy ratios; 4) introducing a spatial multiplexing strategy into the beam field to jointly optimize the propagation direction and initial radiation position of different beams; and simultaneously combining polarization isolation and amplitude-phase modulation to achieve stable multi-beam transmission. This invention can effectively improve the anti-interference capability and energy utilization of multi-beam transmission, meeting the requirements of system applications.

The present disclosure relates to a system for replicating a holographic article, the system comprising: means for illuminating the article with a light beam at a set angle of incidence; means for adjusting a spatial extent of the light beam prior to impingement of the light beam on the article based at least in part on the set angle of incidence. Furthermore, the present disclosure relates to a corresponding apparatus, a method and a corresponding computer program.