192 results about "Optical diffraction" patented technology

The invention provides a high-speed defect identification method and system based on optical diffraction imaging, and relates to the technical field of optics, and the method comprises the following steps: constructing a composite optical diffraction unit comprising a programmable optical metasurface and a quantum phase modulator, optimizing and determining modulation characteristics through a multi-target constraint function, and collecting a quantum coding diffraction image. The quantum state phase reconstruction network is used for processing the image and extracting characteristic parameters, and a result is obtained through analysis of a defect identification model. According to the invention, rapid defect identification with high spatial resolution is realized, and the detection efficiency and accuracy are improved.

Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, an optical device includes: a first optically diffractive component including a first diffractive structure configured to diffract a first color of light having a first incident angle at a first diffracted angle, a second optically diffractive component including a second diffractive structure configured to diffract a second color of light having a second incident angle at a second diffracted angle, a first reflective layer configured to totally reflect the first color of light having the first incident angle and transmit the second color of light, and a second reflective layer configured to totally reflect the second color of light having the second incident angle. The first reflective layer is between the first and second diffractive structures, and the second diffractive structure is between the first and second reflective layers.

Snapshot phase-shifting diffraction modules and associated systems and methods are described that enable high spatial and temporal resolution phase imaging with high immunity to environmental factors such as vibrations and temperature changes. One example optical diffraction phase module includes a polarization grating to produce two circularly polarized light beams with opposite polarizations, a first lens to receive the two circularly polarized beams, and a spatial filter positioned at a focal plane of the first lens. The spatial filter includes two openings, one to spatially filter one of the two circularly polarized light beams, and another opening to allow another circularly polarized light beam to pass. The module also includes a second lens to focus the received light onto an image plane and to enable a phase measurement based a plurality of interferograms. The phase module can be incorporated into a microscope system that operates a reflection or a transmission mode.

The invention discloses an all-optical vortex beam orbital angular momentum mode identification method and system, and relates to the field of optical information processing and optical computing, and the method comprises the steps: S1, constructing a multi-layer architecture all-optical diffraction network; s2, dividing the output detection surface after the diffraction network into a plurality of preset space regions; s3, the vortex light beams carrying orbital angular momentum OAM information sequentially penetrate through the all-optical diffraction network, spatial evolution of a light field in the propagation process is completed, and vortex light classified according to intensity distribution is output; s4, mapping the topological charges of the vortex light to different sub-regions of the detection surface in an intensity distribution form; and S5, performing intensity acquisition on each area on the detection surface through a detector, and determining an OAM mode type of the input light field based on the mode number corresponding to the area with the maximum light intensity. The method is used for performing high-robustness identification on the orbital angular momentum vortex light mode of the vortex light in the presence of a random phase scattering medium.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, an optical device includes: a first optically diffractive component including a first diffractive structure configured to diffract a first color of light having a first incident angle at a first diffracted angle, a second optically diffractive component including a second diffractive structure configured to diffract a second color of light having a second incident angle at a second diffracted angle, a first reflective layer configured to totally reflect the first color of light having the first incident angle and transmit the second color of light, and a second reflective layer configured to totally reflect the second color of light having the second incident angle. The first reflective layer is between the first and second diffractive structures, and the second diffractive structure is between the first and second reflective layers.

The invention belongs to the technical field of optical calculation, and discloses an error-adaptive optical diffraction neural network in-situ training method, which comprises the following steps: based on the phase of each phase modulation layer, calculating the light field complex amplitude Uk of the input sample complex amplitude on the rear surface of each phase modulation layer and the light field complex amplitude Uo of the input sample complex amplitude on an output plane after forward propagation; calculating an error light field P based on Uo, carrying out three-dimensional central symmetry on a back propagation light path of the error light field P without changing the phase distribution of each phase modulation layer, and calculating the light field complex amplitude of the complex amplitude of the symmetrical error light field on the front surface of each phase modulation layer after forward propagation; the method comprises the steps of obtaining the light field complex amplitude Un + 1-k'of P back propagation to the rear surface of each phase modulation layer, calculating the gradient related to a loss function based on Uk and Un + 1-k 'so as to carry out updating, and carrying out the next round of training until a preset training round or loss convergence is reached. The method can adapt to errors existing in an optical system.

The invention discloses a scanning structured light microscopic imaging method and system, and the method comprises the steps: generating a vortex structured light field with spiral phase distribution according to the three-dimensional morphology characteristics of a target sample, synchronously collecting a reflection signal and a fluorescence signal, and obtaining a multi-mode excitation light field data set; performing multi-modal signal fusion processing according to the multi-modal excitation light field data set to generate a multi-dimensional fusion feature map; and according to the multi-dimensional fusion feature map, performing three-dimensional image reconstruction processing by adopting a physical model constrained compressed sensing reconstruction algorithm and combining prior topological information of the sample, and inhibiting motion artifacts and optical diffraction noise through a dynamic sparse base optimization technology to obtain an artifact-inhibited high-resolution microscopic image. According to the embodiment of the invention, motion artifacts and optical diffraction noise can be effectively inhibited, and high-resolution microscopic images can be obtained.

The present disclosure relates to the technical field of optical computing, and particularly relates to an intelligent optical computing chip cluster architecture and system. The architecture comprises: a plurality of optical computing chips, and optical path channels are established between the plurality of optical computing chips by using spatial phase adjustment to modulate light beams; and high-speed optical communication and optical diffraction network computing are performed between the plurality of optical computing chips by performing time-domain intensity modulation on the optical path channels. The present disclosure adopting the above scheme can realize the interconnection computing of optical computing chips in the spatial dimension, and does not rely on electricity for information transmission.

The application discloses a kind of low-quality image super-resolution reconstruction methods based on adversarial generative network, including, with the generation dynamic point diffusion function of differentiable optical diffraction calculation layer, and based on the function, wavefront aberration dynamic compensation mechanism is established, wavefront aberration is predicted and compensated, and the low-resolution input feature of optimization is obtained;According to the optimization feature, generator and discriminator are trained using physical constraint adversarial training strategy, and high-resolution image conforming to optical physical law is generated;The diffraction characteristics of high-resolution image are optimized through multi-scale diffraction consistency verification module, to ensure the physical authenticity and consistency of image under different resolutions;The application can effectively handle the complex degradation characteristics of low-quality image, improve the detail quality and optical rationality of generated image.

The invention provides an optical diffraction tomography resolving method, device and equipment, and belongs to the technical field of optical diffraction tomography. The method comprises the following steps: acquiring an off-axis interference image of a target sample; preprocessing the off-axis interference image to obtain a target refractive index distribution diagram; and taking the target refractive index distribution diagram as input, carrying out iterative reconstruction on the refractive index distribution condition of the target sample through a preset algorithm until the difference between a theoretical scattered field calculated based on the refractive index distribution condition and an actual scattered field measured by an experiment meets a preset condition, and obtaining a resolving result diagram, the preset algorithm is generated by combining total variation regularization and a beam propagation method, and is realized by using a GPU (Graphics Processing Unit) under CUDA (Compute Unified Device Architecture). High-precision and high-efficiency recovery of the three-dimensional refractive index of a sample is realized, and the resolving efficiency and accuracy of optical diffraction tomography are improved.

The invention discloses a light field display method and system with holography as a representation medium, and the method comprises the following steps: S1, collecting a multi-view image of a target scene, carrying out the coding of the multi-view image, and generating a light field tensor containing space and angle information; s2, mapping the light field tensor in the step S1 into a two-dimensional space phase diagram; s3, converting the two-dimensional space phase diagram in the step S2 into a modulation diagram used for driving a spatial light modulator; and S4, driving the spatial light modulator to perform light wavefront modulation according to the modulation graph in the step S3, and reproducing the image of the target scene through optical diffraction. According to the invention, integration from dynamic scene information acquisition to high-quality three-dimensional image reproduction is realized, a low-redundancy and high-fidelity processing link is realized, and the efficiency and quality of holographic display are greatly improved.

The invention belongs to the field of molecular sieve material characterization, and particularly relates to a method for analyzing aluminum atom pairs in a ZSM-5 molecular sieve based on super-resolution fluorescence microscopic imaging, which comprises the following steps: activating a ZSM-5 molecular sieve sample; contacting the obtained sample with probe molecules; washing the ZSM-5 molecular sieve sample, and removing unbound or nonspecifically bound probe molecules; imaging the marked sample by using a super-resolution fluorescence microscope to obtain an image sequence containing a single fluorescent molecule emission event; processing the image sequence, determining a space coordinate of each fluorescence event, and reconstructing a super-resolution fluorescence image exceeding an optical diffraction limit; and based on the space coordinates of the fluorescent dots in the super-resolution fluorescence image, carrying out statistics to obtain the position, surface density or distribution information of the aluminum atom pairs in the ZSM-5 molecular sieve. According to the method disclosed by the invention, nanoscale spatial resolution, direct imaging and quantitative analysis of Al-pair in ZSM-5 (Zeolite Socony Mobil-5) can be realized.

The utility model discloses a seamless moulding press, and particularly relates to the technical field of packaging film production, the seamless moulding press comprises a supporting seat, the left side and the right side of the front part of the upper end of the supporting seat are both connected with supporting plates, and the upper part and the lower part between the opposite surfaces of the two supporting plates are both rotatably connected with an unwinding roller; the front side of the middle of the upper end of the supporting seat is fixedly connected with a tension adjusting mechanism, the middle of the upper end of the supporting seat is fixedly connected with a deviation rectifying mechanism, the rear side of the middle of the upper end of the supporting seat is fixedly connected with a mold pressing assembly, and the rear side of the upper end of the supporting seat is fixedly connected with a winding assembly. According to the plate-seam-free molding press, the tension of a film material can be detected and adjusted in real time through the arranged tension adjusting mechanism, it is ensured that the film material is accurately attached to the holographic roller, pattern ghosting, blurring or microstructure deformation caused by stretching or loosening of the film material is avoided, and therefore the consistency of the optical diffraction effect of an anti-fake pattern is effectively improved.

The invention discloses a low-quality image super-resolution reconstruction method based on a generative adversarial network, and the method comprises the steps: generating a dynamic point spread function through a differentiable optical diffraction calculation layer, building a wavefront aberration dynamic compensation mechanism based on the dynamic point spread function, predicting and compensating wavefront aberration, and obtaining optimized low-resolution input features; according to the optimization features, training a generator and a discriminator by adopting a physical constraint adversarial training strategy, and generating a high-resolution image conforming to an optical physical rule; the diffraction characteristic of a high-resolution image is optimized through a multi-scale diffraction consistency verification module, and the physical authenticity and consistency of the image under different resolutions are ensured; according to the invention, the complex degradation characteristic of the low-quality image can be effectively processed, and the detail quality and optical rationality of the generated image are improved.

According to the method, a cavity black body and a diaphragm hole form an infrared light source, coarse adjustment of a two-dimensional displacement mechanism and fine adjustment of a three-dimensional high-precision displacement mechanism are combined, and an imaging optical system and a narrow-band filter are matched, so that the crosstalk test of a detector with the pixel spacing of 15 microns and below is realized. Through multi-area sampling, multi-band coverage testing and weighted average data processing, the problem that a traditional small-light-spot system is limited by optical diffraction limits is effectively solved, the testing accuracy is remarkably improved, the deficiency of a crosstalk detection method of a small-pixel infrared focal plane detector is overcome, detector evaluation means are enriched, and the detection efficiency is improved. The method is suitable for performance evaluation of infrared imaging system core devices.

The invention relates to the technical field of microscopic imaging, and provides a bimodal imaging system, an imaging method, a device and a storage medium, and the method comprises the steps: generating two laser beams as illumination light and reference light respectively; in the light intensity diffraction tomography mode, lighting light is turned on, the electric diaphragm is turned off to block the reference light, the lighting light passes through an imaging objective lens switched into a low-power objective lens in a first path, and a light intensity diffraction tomography image of the sample is obtained; lighting light is turned on in the optical diffraction tomography mode, an electric diaphragm is turned on to enable the reference light to be propagated along a second path, the lighting light passes through an imaging objective lens switched into a high-power objective lens in a first path, and an optical diffraction tomography image of the sample is obtained; bimodal microscopic imaging is realized based on the light intensity diffraction tomography image and the optical diffraction tomography image; the bimodal imaging system disclosed by the invention is integrated in a set of light path system, and unmarked refractive index imaging of global appearance and local characteristics of a sample can be realized by switching different modes under the control of the subsystem, so that bimodal microscopic imaging is realized.

The invention discloses an ultrahigh space-time resolution detection imaging method and system, and relates to the technical field of optics, and the method comprises the following steps: carrying out the photon space-time dynamic modulation of multi-wavelength short-short pulse laser, and enabling the number of photons in a single-pulse local irradiation field to be in a single-photon / few-photon state; the patterned photons subjected to photon space-time dynamic modulation are distributed and miniaturized to a sample containing fluorescent molecules for double / multi-photon excitation under few-photon irradiation, and double / multi-photon fluorescence is collected; through a high temporal-spatial resolution detection means, spectral information, life information and spatial position information of dual / multiphoton fluorescence are obtained, fluorescence information in a field of view is reconstructed, and super-resolution imaging and positioning of the whole field of view are completed. According to the invention, large-view-field, high-frame-frequency and super-resolution fluorescence detection imaging can be realized, and opportunities are provided for solving the major scientific problem of optical diffraction limit and realizing super-resolution fluorescence microscopy technology innovation.

The invention discloses a space customization three-dimensional column vector light beam array generation method based on a metasurface, and belongs to the field of micro-nano optics, diffraction optics and structured light field regulation and control. The implementation method comprises the following steps of: independently regulating and controlling left-hand circular polarization and right-hand circular polarization components of incident light based on geometric and propagation phase joint modulation of the metasurface; a metasurface, a phase distribution coding lens factor of a polarization channel, a Dammann vortex grating with opposite basic topological charges and a spiral Dammann zone plate are independently optimized, and left-handed and right-handed circular polarization components generate a three-dimensional vortex beam array with opposite spatial topological charges in a near-field Fresnel domain; the left-handed circular polarization vortex array and the right-handed circular polarization vortex array with opposite topological charges are coherently superposed to form a spatially customized three-dimensional column vector light beam array, and the vector characteristic of each light beam in the array depends on the amplitude ratio, the phase difference and the topological charges of the left-handed circular polarization component and the right-handed circular polarization component on each diffraction order. According to the invention, the regulation dimension of the column vector light beam can be expanded.

The invention discloses a super-diffraction dark spot microscopic imaging method based on nonlinear focal spot competition. The hollow light beams with different wavelengths are subjected to incoherent overlapping in a focus area, the double hollow light beams generate excitation photon nonlinear absorption competition in a fluorophore peripheral overlapping area, super-diffraction dark spots are finally generated in a focal plane, and stable fluorescence signals are formed in a small-size signal detection area. A target signal is extracted through a weak signal locking amplification technology. The optical diffraction limit is broken through, so that high-precision positioning of the to-be-observed object in the diffraction limit area becomes possible. The optical power needed by the system is low, the detection sensitivity is high, the device structure is simple, and the system is suitable for high-resolution observation in the fields of biomedicine, nano materials and the like.

The invention relates to the field of optical diffraction, and provides a reflective grating blank, a manufacturing method and a detection system thereof, the reflective grating blank comprises a semi-transparent layer and a reflective layer, the semi-transparent layer is parallel to the reflective layer, the semi-transparent layer comprises a plurality of parallel lines which are arranged at equal intervals, and when a light beam irradiates the surface of the semi-transparent layer, the parallel lines are parallel to the semi-transparent layer. The lines transmit part of light beams and reflect other light beams, the light beams transmitting the semi-transparent layer irradiate the reflecting layer, and the reflecting layer reflects all the light beams. By adopting the reflective grating blank, the resolution ratio of grating pitch measurement can be greatly improved.

To provide an optoelectronic device.SOLUTION: An optoelectronic device comprises a plurality of light transmissive regions extending through the device along a first axis and allowing light to pass through. The transmissive regions may be arranged along a plurality of transverse configuration axes. Emissive regions may be positioned between adjacent transmissive regions along a plurality of configuration axes to emit light from the device. Each transmissive region has a lateral closed boundary having a shape to alter at least one characteristic of a diffraction pattern indicated when the light is transmitted through the device to mitigate interference by the pattern. An opaque coating may include at least one aperture defining a corresponding transmissive region to prevent transmission of light which is transmitted through the opaque coating other than through the transmissive region(s). The device can form a face of a user device having a body and housing a transceiver disposed to receive light along at least one light transmissive region.SELECTED DRAWING: Figure 1

The present application belongs to the field of lithography and neural networks, and specifically discloses a method for extracting angularly resolved polarized scattering overlay errors based on optical diffraction, comprising: performing polarization differentiation on the frequency domain image of the objective lens back focal plane of the overlay mark to be measured to obtain a target image corresponding to the overlay mark to be measured; inputting the target image into a trained error extraction network to obtain the overlay error value of the overlay mark to be measured; wherein the error extraction network is trained based on training samples and identification labels corresponding to the training samples; the training samples are obtained by utilizing the nanostructure morphology parameters and material optical constants of the overlay mark in combination with pre-examination measurement conditions, and polarized through an established forward optical characteristic model of the overlay mark. The present application can improve the accuracy of overlay error extraction.

The invention provides a double-state interference morphology measurement method and system for a discontinuous precision surface, and belongs to the technical field of optical precision measurement. Based on a Fizeau interferometer, interference images in a focusing state and an out-of-focus state are respectively acquired, two-dimensional structure information and height information of a sample with a discontinuous precise surface are respectively extracted, and two-state data fusion is carried out, so that three-dimensional morphology reconstruction is realized. The method breaks through the limitation of the optical diffraction limit on the resolution, avoids the failure problem of a traditional phase unwrapping algorithm at a discontinuous boundary, remarkably enhances the environmental interference resistance, improves the calculation efficiency, is suitable for high-precision surface measurement of a vacuum chuck and the like with a large number of discontinuous characteristics, and has a wide application prospect. And a reliable solution is provided for high-end manufacturing quality control.

The invention relates to the technical field of microscopic imaging, and discloses a multi-level physical model and double-domain deep learning structured light illumination imaging reconstruction method, which comprises the following steps: firstly, constructing a multi-level physical degradation model based on illumination light field modulation, optical diffraction sensor discrete sampling and photoelectric noise, and generating a simulation data set containing random errors; then constructing a deep neural network containing spatial domain and frequency domain branches, and performing iterative training on the network by using a joint loss function; and finally, acquiring an original structured light stripe image of a real sample, inputting the original structured light stripe image into the trained model to execute end-to-end reasoning, and outputting a super-resolution fluorescent microscopic image. According to the method, the problem of obtaining real pairing training data is solved through physical simulation, high-frequency detail recovery is enhanced by utilizing frequency domain constraint, reconstruction artifacts are effectively removed, the imaging resolution is improved, and the spatial resolution and edge sharpness of a reconstructed image are improved while the ringing effect and background noise are effectively suppressed.

A method for identifying an unknown target in a complex environment by using an all-optical diffraction neural network is characterized in that the adopted all-optical diffraction neural network is composed of multiple layers of phase-type diffraction optical elements, multiple wavefront regulation and control can be performed on a light field corresponding to an input image, and classification and identification of the image are completed in an optical domain after diffraction propagation of a certain distance; on the basis of a diffraction neural network, an anti-interference recognition mechanism is provided, concepts of a target object and an interferent which need to be specifically classified are provided in a diffraction neural network training stage, and a loss function and a constraint condition are set respectively; in combination with a wavelength multiplexing mechanism, different target object classification tasks are independently processed under different wavelength channels, so that classification results of all wavelength channels are integrated in a full-wave band range, the classification task of unknown targets in a complex environment is realized, and the advantages of high speed and low energy consumption of the all-optical diffraction neural network are exerted. The limitations of simple application scene, small target number and the like of the optical neural network are overcome.

Microscopy imaging that allows for multiple mRNAs, proteins and metabolites to be spatially resolved at a subcellular level provides valuable molecular information which is a crucial factor for understanding tissue heterogeneity as for example within the tumor micro environment. The current invention describes a method (High Density-SUMI-Seq) which combines the use of Spatial Unique Molecular Identifier in situ localization and identification (by in situ sequencing or sequential fluorescence hybridization) of rolonies derived from rolling circle amplification of circular oligonucleotides and in vitro sequencing of target amplified RNA or DNA in combination with SUMI identification at a subcellular level with no optical diffraction limitation in the amount of amplified target information that can be analyzed per cell. Apart from amplified RNA or DNA, the High Density-SUMI-Seq method can also be applied using linear oligonucleotides to spatially resolve proteins and metabolites to provide multiomics results.

The invention discloses a multi-wavelength channel diffraction neural network system based on threshold screening and a processing method, and belongs to the technical field of artificial intelligence and optical computing. Comprising an encoding module used for encoding task information corresponding to different to-be-processed tasks to multiple light beams with different working wavelengths output by a light source module to form multiple task channel light fields; the optical diffraction module comprises a plurality of modulation layers; the optical diffraction module is used for receiving the task channel light fields and realizing diffraction modulation and threshold screening of the task channel light fields by changing the metasurface structures on different modulation layers; each task channel light field shares the same set of diffraction modulation parameters, namely parameters such as phase, mask generation and threshold; threshold screening: comparing the mask generation parameter with a threshold parameter, performing binarization selection on the phase parameter according to a comparison result, and screening out a target phase parameter; the output detection module detects the output light intensity. Task channels are expanded, and the system integration degree is improved.

A laser processing device for generating a plurality of grooves in a surface comprises an optical diffraction arrangement adapted to receive a laser radiation and to generate an output radiation hereupon, the output radiation having a plurality of intensity maxima. An actuator arrangement is provided for generating a relative movement between the output radiation and the surface, wherein each intensity maximum generates a groove of the plurality of grooves.

The present invention relates to the field of optical detection technology, and specifically provides an optical needle generation method, a spatial light modulator, a detection arm optical path, and an OCT system for an OCT system. The method sets the number of focal points on the optical axis according to the target optical needle parameters, and optimizes the focal point position and interval; then generates a phase diagram of the target optical needle, and loads the phase diagram through a spatial light modulator. After the light beam is modulated by the spatial light modulator, the target optical needle can be generated. Compared with the traditional quartz optical diffraction element-based method, which has the disadvantage of having a fixed number of focal points and phase distribution and only being applicable to fixed parameter light beam adjustment, the present invention uses a spatial light modulator to modulate the generated optical needle, and can dynamically adjust the number of focal points and focal depth length by adjusting the spatial light modulator, thereby realizing dynamic modulation of the optical needle. The present invention further applies this method to a spatial light modulator, and for the first time uses a spatial light modulator in a detection arm optical path and an OCT system to modulate the detection beam.

Embodiments herein relate to systems, apparatuses, or processes directed to an integrated optical coupler that may be used to optically couple a waveguide and a PIC. In embodiments, the integrated optical coupler may include an optical diffraction grating mechanism, an optical lens, and a Faraday rotator. In embodiments, the integrated optical coupler may at least partially within a housing. Other embodiments may be described and / or claimed.