83 results about "Optical encryption" patented technology

The invention discloses a total-space near-far field regulation and control method based on a coherent pixel super-structure surface. The method comprises the following steps: 1) constructing a nano-structure unit and a super-unit; 2) optimizing the structural parameters of the nano-structure unit according to the incident light wavelength lambda, and verifying the regulation and control effects of the super-unit I and the super-unit II; and 3) constructing a nano-structure array, wherein the nano-structure array comprises a plurality of super-units I and super-units II. Left-handed / right-handed circularly polarized light is set to be incident to the surface of the single-layer metastructure, binary nano printing of an image is achieved in a near field, and near-field nano printing intensities in a transmission space and a reflection space are complementary; different holographic patterns are respectively presented in the far-field transflective space, and the far-field transflective channels are regulated and controlled by mutually independent and continuous phases. By properly designing the single-layer nano brick, continuous and independent phase control of reflection and transmission spaces can be realized without additional equipment, far-field holographic imaging and near-field nano printing can be realized, and the single-layer nano brick can be applied to the fields of depth detection, three-dimensional imaging, optical encryption, high-resolution image storage and the like.

The invention relates to the technical field of block chains, and provides a food and drug-oriented block chain anti-counterfeiting traceability method and system, and the method comprises the following steps: S1, embedding interference fringes with encrypted information in a color image, and generating an optical encrypted image of a product; s2, dynamically binding the phase mode of the optically encrypted image with the hash value of the product of each block chain node; and S3, verifying the product based on the physical characteristics of the optical encryption image and the dynamic binding relationship between the phase mode of the optical encryption image and the block chain node. According to the invention, the technical problems of easy copying of physical labels, many forbidden scenes, high risk of data tampering, insufficient dynamic anti-counterfeiting capability and lagging of channel conflict detection in food and drug circulation are solved, dual interlocking verification of physical characteristics and digital characteristics is realized, real-time credible tracing of full links of food and drug production, circulation and consumption is ensured, and the product quality is improved. And a safe, reliable, flexible and universal anti-counterfeiting tracing solution is provided for the food and medicine industry.

The invention discloses a degeneracy-based multi-channel image encryption method for a phase change metasurface. Comprising the following steps: 1) designing # imgabs0 # nano bricks which are arranged according to a certain rule and have different sizes and directions on a metasurface to obtain a phase change metasurface with two near-field printing channels and a far-field holographic channel, and performing degeneracy distribution on the two near-field printing channels of the phase change metasurface to realize energy control on the two near-field printing channels; an independent channel is provided for far-field holographic projection by using an improved annealing algorithm and additional degree of freedom given by a Malus law, and dynamic display and switching of a far-field holographic image are realized; and 2) based on the obtained phase change metasurface, optical encryption of the three-channel image is realized by switching the state of the nano brick by utilizing the property of the phase change material. Three information channels are coded on a single phase metasurface by utilizing the flexibility of the multi-channel design and by means of the reversible and adjustable characteristics of the # imgabs1 # nanostructure, so that the information capacity and the safety can be remarkably improved.

The invention provides a collaborative optimization and task processing method and device and an optical encryption system, and relates to the technical field of computational optics, artificial intelligence and the like. The collaborative optimization method comprises the following steps: acquiring a training sample set, and acquiring an initially set optical parameter of an optical module; determining the optical parameter as a target parameter, and executing the following first processing: training a task processing model according to a training sample set and the target parameter; in response to determining that the first end condition is met, determining a reward value according to the target parameter and a newly obtained task processing model, and updating the target parameter according to the reward value based on a reinforcement learning mode; and in response to determining that the second end condition is not met, repeatedly executing the first processing according to the updated target parameter, and in response to determining that the second end condition is met, determining the newly obtained task processing model and the target parameter as a required collaborative optimization result. By means of the scheme, the accuracy of the processing result can be improved.

The invention relates to an anti-counterfeiting and anti-channel conflict system and method for realizing multi-code association by using invisible tagging, and belongs to the technical field of commodity anti-counterfeiting and traceability. Comprising the following steps that S1, a composite image containing a latent code is generated on a commodity identification carrier, and the latent code is fused with an original image through an optical encryption algorithm and needs to be read by special equipment; s2, generating a dynamic corresponding relationship between the anti-counterfeiting code and the hidden code, and establishing a dynamic association rule between the validity state of the anti-counterfeiting code and the physical integrity of the hidden code; s3, dynamically binding the hidden code with the commodity code, the anti-counterfeiting code and the order data in a commodity ex-warehouse stage to form a multi-dimensional association relationship; s4, the associated data is encrypted and then written into the block chain network, a main chain stores a data abstract, and a side chain stores encryption details; and S5, reading the hidden codes through verification equipment, verifying multi-code consistency and regional compliance, and triggering a grading alarm if goods fleeing or tampering exists. The data corresponding relation between the invisible code and the anti-counterfeiting code designated position is achieved, double-layer hiding and dynamic correspondence are achieved, one-product multi-code association is achieved, the counterfeiting threshold and the counterfeiting threshold are further greatly improved, and the inspection easiness is improved.

The invention discloses an optical encryption film material as well as a preparation method and application thereof, and the preparation method of the optical encryption film material comprises the following steps: uniformly mixing terephthalic acid, aliphatic dibasic acid and water to obtain a mixed aqueous solution; under the stirring action, 1, 5-pentamethylene diamine is slowly and dropwise added into the mixed aqueous solution, and a transparent salt solution is obtained; carrying out condensation polymerization reaction on the transparent salt solution to obtain nylon synthetic resin; preparing the nylon synthetic resin into a film; and carrying out two-way stretching on the film to obtain the optical encryption film material. The preparation method of the optical encryption thin film material is simple and low in cost, and the optical encryption material with higher cost performance can be prepared.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

The invention provides an optical encryption communication method and system based on up-conversion pulse response, and relates to the technical field of information encryption, and the method comprises the steps: converting to-be-encrypted original data into coded data according to a preset transcoding rule; according to the coded data and a luminescence characteristic mapping table, target excitation parameters of the laser pulse are determined, the target excitation parameters comprise the target width of the laser pulse, and the luminescence characteristic mapping table is used for representing luminescence characteristics of each luminescence wave band in the up-conversion luminescent material; and exciting the up-conversion luminescent material by using a laser pulse with a target excitation parameter, so that the up-conversion luminescent material emits a fluorescence signal corresponding to the coded data. Therefore, the target excitation parameter of the laser pulse can be determined by utilizing the light emitting characteristic of the light emitting wave band in the up-conversion light emitting material, so that the emission of the fluorescence signal is realized, namely, the encrypted communication can be realized by controlling the laser pulse without switching and controlling multiple light sources, and the efficiency of the encrypted communication is improved.

The application discloses a kind of asymmetric color image optical encryption methods based on generalized singular value decomposition, including encryption process and decryption process, encryption process: asymmetric optical encryption system of color image, the technical scheme adopted is, in encryption system, a kind of double random phase encoding encryption scheme based on generalized singular value decomposition is designed, color image is first encoded into complex matrix, the complex matrix obtained is modulated with phase plate by generalized singular value decomposition, then encryption is carried out in optical Fourier transform domain using phase truncation technique, finally the ciphertext is received by charge coupled device.The application mainly aims at the problem that existing asymmetric encryption system based on phase truncation cannot resist special attack, a kind of modulation method based on generalized singular value decomposition is designed to image and random phase plate, the encryption algorithm can realize color image encryption, effectively resist shear attack, noise attack, chosen-plaintext attack and special attack.

The present application relates to the technical field of wireless charging, and particularly relates to a safety interlocking system for infrared laser long-distance wireless charging; through cooperation of spatial distribution of multiple photodiodes and hardware structure, when the light path is invaded by foreign matters, the control circuit can quickly cut off the high-power laser output, and the three-dimensional layout eliminates the spatial blind area of single-point detection, the polarization discrimination element in the transmitting end device and the phase delay element in the receiving end device are combined to construct an optical encryption closed loop, only the light received by the sensor after being inversely reflected to the receiving end rotatable polarization state is allowed, the in-phase polarized light reflected by ordinary mirror foreign matters is effectively blocked, the risk of mirror deception reflection attack in the high-power scene is greatly reduced, and through the pure hardware phase-locked loop frequency decoding circuit, only the reflected light output logic level carrying the preset modulation frequency is output, direct current and low-frequency interference of sunlight and illumination light sources are filtered from the physical layer.

The application discloses a kind of photochromic circular polarized luminescent carbon dots long afterglow composite materials and preparation method and application thereof, belong to chiral luminescent functional material technical field;The composite material with photochromic and long afterglow luminescence characteristics carbon dots as luminescent center, and with cellulose nanocrystal through self-assembly to form chiral composite system with cholesteric helical structure.Carbon dots provide fluorescent emission, photochromic and long afterglow luminescence characteristics, while the chiral structure of cellulose nanocrystal can selectively circularly polarized modulation to luminescence, so as to realize the enhancement of circular polarized luminescent signal.The composite material can realize reversible photochromic luminescence behavior under ultraviolet irradiation, and produce long afterglow emission after excitation stops, while showing obvious circular polarized luminescence characteristics.The material has the advantages of stable structure, simple preparation method, high functional integration, etc., and has good application prospect in information anti-counterfeiting, optical encryption, chiral optoelectronic devices and intelligent display fields.

The invention relates to the technical field of optical encryption, and discloses a thermal control optical encryption method, device and equipment, a storage medium and a computer program product, and the method comprises the steps: transmitting terahertz light waves in a specific frequency range to a terahertz metasurface when confidential information and an encryption demand are received, and obtaining a first terahertz signal; adjusting the temperature of the terahertz metasurface according to an encryption requirement, and collecting a second terahertz signal generated after the first terahertz signal is modulated by the terahertz metasurface based on an adjustment result; and generating an original password according to the first terahertz signal and the second terahertz signal, and encrypting the confidential information through the original password to obtain encrypted data. The transmission rate of terahertz light on the metasurface is changed through accurate temperature control, rapid modulation of terahertz signals is achieved, encryption of optical information is completed according to the modulation result, and encryption flexibility and security are greatly improved.

The invention discloses a bionic circular dichroism optical encryption device based on a tiger structure, and the device comprises a first substrate, a first conductive layer, a first electrode patch, an information encryption layer, a second conductive layer, a second electrode patch, and a second substrate. Wherein the information encryption layer adopts a double-layer Z-shaped structure design to simulate a tiger function, an upper layer fixing structure corresponds to a left half tiger of a palm tube, and a lower layer dynamic rotating structure corresponds to a right half tiger held by a user. A ciphertext transmission system is constructed by regulating and controlling three key parameters of an inclination angle, a rotation angle and an electromagnetic wave incidence angle of the lower layer structure, and steganography information can be accurately decrypted by using a specific CD key only when the three key parameters meet preset matching conditions at the same time. According to the invention, the dynamic adjustable circular dichroism (CD) is innovatively realized, and an optical security system for information encryption is constructed through the bionic design of key matching.

The application relates to a surface enhanced Raman scattering (SERS) substrate, a preparation method and application thereof, and belongs to the technical field of Raman spectrum detection. The substrate comprises, from bottom to top, a substrate layer, a distributed Bragg reflector, a chalcogen phase change material functional layer and a nanoscale metal structure layer. The distributed Bragg reflector is composed of a periodic structure stack of medium materials with different refractive indexes. The distributed Bragg reflector is coupled with the nanoscale metal structure layer to excite a Tamm state. The chalcogen phase change material functional layer can realize reversible regulation of amorphous state and crystalline state under external light excitation, changes the Tamm state resonance wavelength to regulate the SERS enhancement effect. The application realizes high-sensitivity detection through double enhancement of the Tamm state and localized surface plasmon resonance, has the characteristics of non-volatility, reconfigurability, high reproducibility and design flexibility, is convenient to operate, stable in performance, and is suitable for fields of chemical biological sensing, laboratory chip systems and optical encryption.

The invention discloses a multi-optical characteristic composite film and a blending pouring preparation method, and belongs to the technical field of optical encryption and anti-counterfeiting. According to the method, polyvinylpyrrolidone (PVP), sorbitol and polyethylene glycol (PEG) are introduced to serve as dispersing agents to play a coating role on SiO2 and CNC, so that the compatibility of SiO2 and CNC is improved, the SiO2 can form a homogeneous film after coating due to the fact that the refractive index of the dispersing agents is similar to that of SiO2, and therefore the transparency of the film is improved; good dispersibility and high transparency enable SiO2 in the composite film to present gorgeous iridescent color. The obtained composite film shows the structural color of a CNC photon layer under natural light, shows the bright structural color of CNC under natural light, shows the SiO2 structural color with a dynamic change effect under a point light source, shows the structural color and fingerprint texture texture of CNC under a super depth-of-field microscope, and shows the birefringence color of CNC under a polarizing microscope. The film with multiple optical characteristics has great application potential in the fields of optical anti-counterfeiting, information encryption and the like.

The application relates to an optical encryption method and an optical encryption system, the method comprising: loading spatial plaintext information to be encrypted into an optical path to obtain an optical beam carrying the spatial plaintext information; modulating the optical beam into a time-varying optical field through a complex medium, wherein the dynamic characteristics of the complex medium vary with time and repeat in a fixed period, and the periodic variation of the optical field is determined by the fixed period; collecting information of the optical field in a preset time period within the fixed period as time-domain ciphertext data. In the optical encryption, an additional key control parameter, i.e. the optical field information in a specific time period within the selection period, is introduced to generate the ciphertext, the generation of the ciphertext becomes more complex and unpredictable, the key space is expanded, the leakage of the periodic characteristics of the optical field is avoided, and the security of the system is significantly enhanced. Meanwhile, since the encryption no longer depends on complete time sequence data, the requirement for the hardware performance is reduced, the implementation cost is further reduced, and the encryption efficiency is improved.

The invention discloses a photochromic core-shell structure organic metal silicon nano composite material and preparation and application thereof, and the composite material is prepared by the following method: under a heating condition, respectively preparing a platinum (II) complex Pt-AP and a spiropyrane derivative SP-AP; the preparation method comprises the following steps: under a room temperature condition, taking tetraethoxysilane as a silicon dioxide precursor, adding Pt-AP into an alkaline solution of ethanol and water, and reacting to obtain core silicon dioxide nanoparticles Pt-SiO2; and then carrying out resuspension, adding a surfactant, SP-AP and tetraethoxysilane, and carrying out a reaction to obtain the photochromic organic metal silicon nano composite material with the core-shell structure. The preparation process is simple, purification is easy, the obtained photochromic composite material and the nanofiber film have reversible response to ultraviolet light and visible light, and the high-performance and multifunctional dynamic optical encryption effect can be achieved.

The invention discloses a multi-image narrowband display and encryption method based on an F-P cavity integrated metasurface. According to the method, two metasurface structures with different sizes are integrated above an F-P cavity with proper cavity length and thickness, so that the device is endowed with a dual-band narrow-band transmission filtering characteristic, and independent regulation and control on amplitude and polarization are realized under respective resonant wavelengths. Specifically, the two metasurface structures present a significant polarization-independent transmissivity difference at a wavelength 1, and present as a quarter-wave plate with a polarization conversion function at a wavelength 2. An array is constructed based on the device, and three different binary images (images 1, 2 and 3) can be encrypted and hidden in the structural array by using the dual-band narrow-band filtering and the amplitude and polarization regulation and control characteristics of the device. Wherein the gray value of the image 1 determines the size of the metasurface structure at any position, and the image 2 and the image 3 determine the rotation angle of the metasurface structure at the position. Specifically, under the wavelength 1, right-handed circularly polarized light is incident, and an encrypted image 1 can be observed; under the wavelength 2, right-handed circularly polarized light is incident and detected by polarization analyzers with polarization angles of 0 degree and 45 degrees respectively, and the encrypted image 2 and the encrypted image 3 can be observed. Due to the dual-band narrow-band filtering characteristic of the method, a clear image cannot be observed under a non-filtering wavelength, and the security of metasurface optical encryption is improved.

An optical encryption camera includes a sensor array and a filter positioned over the sensor array to receive light prior to the sensor array. The filter includes a multiplexing mask and a scaling mask in sequence. The multiplexing mask and the scaling mask combine to provide an encryption key to encrypt image data prior to capture.

This invention discloses a compressed optical encryption scheme based on ghost imaging and image authentication. During encryption, the target object is illuminated using Hadamard speckle lighting, and the intensity of the reflected light is collected by a bucket detector. To improve data transmission security, a steganography method is introduced to hide the data. The collected bucket signals are encoded into a series of random binary speckle sequences and hidden within a projection pattern used to illuminate the authentication image. During the measurement of the authentication image, diffraction data is collected using the bucket detector to obtain the sequence authentication key data. Once the receiver is authenticated, the corresponding key is sent to recover the secret image. This invention introduces an authentication method, improves the security of information transmission, compresses the data, and the proposed encryption method has high decryption quality and security.

The present invention discloses a mechanically modulated optical encryption system and a dynamic holographic image switching method. The system includes a light source, a composite phase plate, a convex lens and an image acquisition device arranged in sequence. The composite phase plate includes two phase plates arranged in parallel. The two phase plates are encoded with vortex phase information. The image phase is increased on one of the phase plates. At least one of the phase plates is connected to a rotation drive device, which is used to modulate the phase of the corresponding phase plate. The light beam emitted by the light source is modulated by the composite phase plate and outputs vortex light. The topological charge of the vortex light is adjusted by regulating the relative rotation amount of the two phase plates. At the same time, a dynamic holographic image switching method based on the above system is disclosed. The relative rotation angle of the two phase plates is related to the topological charge of the output vortex light. A simple composite phase plate structure is used to realize single-beam multi-topological charge output, reduce system complexity, and store high-density information with only two phase plates at low cost.

This invention provides a photosensitive polyurethane film with a surface grating, its preparation method, and its applications. The photosensitive polyurethane film with a surface grating exhibits well-defined and controllable photoresponse characteristics. Its core mechanism lies in the photosensitive monomer responding to light stimulation of a specific wavelength through a dimerization reaction: under ultraviolet light irradiation, the photosensitive monomer in the film undergoes a [2+2] cycloaddition to generate a four-membered cyclobutane dimer. This response mechanism is clear, the triggering path is independent, and the response efficiency is high. It effectively overcomes the limitations of existing coumarin derivatives, which can only achieve self-healing technology. By controlling parameters such as irradiation time and number of irradiations, multi-dimensional information storage can be achieved, significantly improving information storage capacity and stability. This effectively solves the urgent problem of high-capacity information storage in the current field of optical encryption materials, providing a feasible technical path for improving the performance and expanding the practical applications of optical encryption materials.

The present invention relates to a liquid crystal vector holographic generating element, a preparation method, and applications thereof. The element comprises: a first substrate and a second substrate; a first alignment film formed on the first substrate near the second substrate; a second alignment film formed on the second substrate near the first substrate; a vector holographic phase control pattern disposed on the first and second alignment films; first and second spacer particles disposed between the first and second alignment films; and a liquid crystal layer disposed within the internal space formed by the first and second alignment films, the first and second alignment films, and the first and second spacer particles. The liquid crystal vector holographic element produced by the present invention can reconstruct arbitrary holographic patterns and vector distributions, is inexpensive to manufacture, and is easy to prepare. It can be widely used in fields such as multi-channel optical communications, optical information storage, and enhanced optical encryption.

The present application relates to an optical encryption device, an optical decryption device and an optical encryption communication system, the encryption device comprising: a control unit for generating a control signal based on a pre-encryption protocol; an optical control unit for encoding the plaintext optical signal based on the control signal to obtain the ciphertext optical signal; wherein the encryption protocol is based on the correspondence between the refractive index distribution of the optical control element and the control signal; the optical control element comprises an electrically controllable adjustable scattering medium, the electrically controllable adjustable scattering medium comprises a plurality of tunable anisotropic micro elements, and the refractive index distribution of the electrically controllable adjustable scattering medium can be changed based on the control signal loaded thereon. The system of the present application has good response speed and response accuracy, so as to improve the communication efficiency and communication quality of the communication system under the premise of ensuring the communication security.

The invention relates to the technical field of optical encryption, and discloses a holographic encryption and decryption system based on a neuromorphic optical reserve pools, which comprises a holographic recording subsystem, a neuromorphic optical encryption subsystem and a machine learning decryption subsystem, and is characterized in that the holographic recording subsystem is used for generating an original hologram of a three-dimensional object to be encrypted; the method comprises the following steps: acquiring an original hologram, converting the original hologram into a time sequence holographic signal, inputting the time sequence holographic signal into a neuromorphic optical encryption subsystem, completing nonlinear dynamic encryption of the time sequence holographic signal, generating a ciphertext hologram, inputting the ciphertext hologram into a machine learning decryption subsystem, and recovering a decryption hologram from the ciphertext hologram. The invention further discloses a holographic encryption method based on the neuromorphic optical reserve pool.

The optical encryption camera includes a sensor array (404) and a filter (402) positioned above the sensor array to receive light before the sensor array. The filter, in turn, includes a multiplexing mask (106) and a scaling mask (108). The multiplexing mask and the scaling mask combine to provide an encryption key for encrypting image data prior to capture.

This invention relates to a polarization-customized holographic device based on a spin-decoupled plasmonic metasurface, belonging to the fields of micro-nano optics, diffraction optics, and holographic imaging. The device employs a three-layer metal-dielectric-metal reflective structure, consisting of a bottom metal reflective surface, an intermediate dielectric spacer layer, and a top anisotropic metaatomic layer. The top metaatomic layer is composed of various periodically arranged metaatoms. By superimposing the propagation phase and geometric phase, phase decoupling between left-handed circular polarization (LCP) and right-handed circular polarization (RCP) is achieved, allowing independent control of their phase delays. Precise customization of the output linear polarization direction is achieved by adjusting the phase difference between the two. This invention breaks the lock-in relationship between geometric phase and spin state in existing metasurface holographic devices, achieving highly integrated, high-quality polarization-customized holographic imaging. It exhibits stable performance over a wide spectral range and large incident angles, and can be widely applied in optical encryption, secure displays, and optical communications.

This invention relates to the field of image encryption and discloses an optical image asymmetric encryption method based on nonnegative matrix factorization. The encryption method includes the following steps: S1, generating a preliminary encryption result through a first optical transformation based on the original image and a first random phase mask; S2, generating an encrypted result through a second optical transformation based on the preliminary encryption result and a second random phase mask; S3, performing nonnegative matrix factorization on the encrypted result to generate an image matrix and a coefficient matrix; S4, using the coefficient matrix as ciphertext and the image matrix as the private key to complete image encryption. This invention significantly improves the security of optical encryption. It combines nonnegative matrix factorization with double random phase coding to construct an asymmetric encryption mechanism that effectively resists known plaintext, chosen plaintext, and special attacks, while also being robust to cropping and noise interference. The framework is highly scalable and applicable to image and audio data encryption.

The invention provides an optical encryption processing chip and processing system based on tunable micro-ring arrays, the chip comprises a light generation unit, a data loading unit, a data encryption unit, a data processing unit, a digital-to-analog converter and an analog-to-digital converter, the data encryption unit is constructed based on N * N tunable micro-ring arrays, a data loading unit loads to-be-processed data sent by a data processing unit to signal light, and then a data encryption unit constructed based on N * N micro-ring arrays encrypts the to-be-processed data on the signal light based on encryption weight information sent by the data processing unit to obtain encrypted signal light. An on-chip optical domain encryption result can be obtained through one-time operation by utilizing an optical encryption processing chip based on the tunable micro-ring array through a designed transmission and calculation integrated optical processing architecture, the increasing high-parallel operation requirement is met, the optical domain encryption processing chip is matched with a control algorithm loaded on a data processing unit, and the on-chip optical domain encryption processing system is suitable for being applied to a data processing unit. The tunable micro-ring array is controlled in real time through the electrical port, so that the whole optical chip can work continuously in all weather, and the encrypted data transmission capability and the anti-interference capability of the optical chip are enhanced.