47 results about "Source plane" patented technology

The invention discloses a method for generating a flat-topped beam array, and the method comprises the steps: introducing a multi-Gaussian function and a hyperbolic function, carrying out the superposition of the hyperbolic function, and constructing a weighting function and a kernel function with Gaussian distribution intensity based on the superposed hyperbolic function and multi-Gaussian function; introducing a partially coherent light construction formula, and constructing a cross spectral density function of a multi-cosine multi-Gaussian correlation light field containing a multi-cosine function at a source plane by combining a weighting function and a kernel function; introducing a free space transmission formula, and constructing a light intensity expression of the multi-cosine multi-Gaussian correlation light field at any transmission distance according to a cross spectral density function of the multi-cosine multi-Gaussian correlation light field, namely, an expression of the multi-cosine multi-Gaussian correlation light field; adjusting parameters of the transmission distance and the multi-cosine multi-Gaussian correlation light field to obtain flat-topped beam arrays with different row numbers and column numbers, and realizing an array form with adjustable flat-topped sub-beams; according to the invention, the number of the sub-beams of the flat-topped beam array can be effectively regulated and controlled.

The invention discloses a method for regulating and controlling a cosine multi-Gaussian correlation structure light field, and the method comprises the steps: introducing a hyperbolic cosine function and a multi-Gaussian function, and constructing a weighting function and a kernel function based on the hyperbolic cosine function and the multi-Gaussian function; introducing a partially coherent light construction formula, and constructing a cross spectral density function of a cosine multi-Gaussian correlation structure light field at the source plane by combining a weighting function and a kernel function; introducing a free space transmission formula, and constructing a light intensity expression of a cosine multi-Gaussian correlation structure light field at any transmission distance according to a cross spectral density function, namely, an expression of the cosine multi-Gaussian correlation structure light field; adjusting the transmission distance and parameters of the cosine multi-Gaussian correlation structure light field to obtain light intensity distribution regulation and control of the cosine multi-Gaussian correlation structure light field, and further obtaining an array form in which sub-beams are flat-topped beams according to the light intensity distribution regulation and control; according to the invention, controllable transmission of the cosine multi-Gaussian correlation structure light field can be realized, and effective regulation and control of the array form in which the sub-beams are flat-topped beams can be realized.

The disclosure provides an optical system, a semiconductor processing system, and a method for processing a semiconductor wafer. In one example, the optical system includes: (1) a light source configured to provide source light to a source plane to form a plurality of first subbeams, (2) optical elements configured to modify each of the plurality of first subbeams to form a plurality of interrogation spots on a wafer according to a predetermined pattern, wherein the optical elements are further configured to modify each of the plurality of first subbeams upon reflection from the wafer to form a plurality of second subbeams upon an image plane, and (3) a spectrometer configured to receive collected light from the plurality of second subbeams.

An optical lens assembly includes: a first element group including: a first lens group with positive refractive power, including one or two lenses; a second element group including: a second lens group with positive refractive power, including two or three lenses; an optical element including, in order from a visual side to an image source side: an absorptive polarizer, a reflective polarizer and a first phase retarder; and a partial-reflective-partial-transmissive element; and a third element group including an image source plane. The first element group, the second element group and the third element group are arranged in order from the visual side to the image source side. When the optical lens assembly satisfies a specific condition, the weight of the device can be reduced, the zoom function can be provided, and the image quality can be ensured.

A method of fabricating a MMIC system includes providing an engineered substrate including a growth substrate and a device layer coupled to the growth substrate, fabricating a plurality of MMIC device elements using the device layer, and providing a carrier substrate including a plurality of metallic structures. The method also includes bonding the plurality of metallic structures to the plurality of MMIC device elements, removing a portion of the growth substrate, and removing a portion of the carrier substrate. The method further includes forming a ground / power plane coupled to the growth substrate, forming a plurality of vias passing from the ground / power plane to one or more of the plurality of MMIC device elements, and joining a cooling structure to the carrier substrate.

This application discloses a fast and interpretable homography decomposition method, relating to the field of computer vision technology. The method includes: obtaining a first anchor point pair, a second anchor point pair, and two sets of auxiliary point pairs based on a source image and a target image; calculating a first similarity transformation matrix based on the first anchor point pair and a second similarity transformation matrix based on the second anchor point pair; the first similarity transformation maps the first anchor point pair to a standard anchor point, and the second similarity transformation maps the second anchor point pair to the standard anchor point; calculating the parameters of a kernel transformation matrix using the auxiliary point pairs on the source plane and the target plane; the kernel transformation matrix has the property of preserving the standard anchor points; and synthesizing a homography matrix from the source plane to the target plane based on the first similarity transformation matrix, the second similarity transformation matrix, and the kernel transformation matrix. This application aims to solve the problems of low computational efficiency, scene limitations, and lack of algebraic and geometric meaning in existing homography calculation methods.

The invention belongs to the technical field of optical thin film detection, and particularly discloses an optimization method of an optical thin film detection system, which is used for solving the problems of weak interference resistance, poor pollution resistance and insufficient complex scene adaptation of the traditional detection system. The method comprises the following steps: pre-selecting a light needle beam with a needle-point-shaped cross section as a light source, defining a source plane light field, and constructing a limited energy generation condition through apodization operation; setting a plurality of groups of regulation and control parameters for three transmission states of diffraction, non-diffraction and focusing; building an experiment system to generate a directional light needle light beam, simulating pollution and interference scenes, and collecting light field data of different transmission nodes before and after interference; and quantizing the light field similarity through a witness function, screening an optimal regulation and control parameter, and integrating the optimal regulation and control parameter to a detection system. According to the invention, the anti-interference and information stability are improved from the light source essence, the method is adaptive to ultrathin, multi-layer thin film and complex environment detection, the detection precision and long-term stability are obviously improved, and both practicability and economy are taken into account.

The invention discloses a station weighting-based micro-seismic event plane positioning confidence ellipse calculation method, which comprises the following steps of: screening P-wave arrival time data simultaneously received by a plurality of stations, and calculating an initial seismic source position coordinate and an arrival time residual error of each station; the arrival time equation is linearized, and a design matrix and an initial weight matrix are constructed; constructing a normal equation based on the design matrix and the station weight matrix, solving a parameter correction amount, and updating a seismic source position coordinate and a seismic moment; calculating a covariance matrix and extracting a sub-matrix, performing eigenvalue decomposition to obtain eigenvalues and eigenvectors, and calculating an ellipse area under a preset confidence level; respectively resetting the weight of each station to zero, recalculating the area of the confidence ellipse, constructing an influence index of the station on the area of the ellipse, and adjusting the weight of the station according to the influence to obtain an updated weight matrix; and judging a convergence state based on the relative change rate of the confidence ellipse area, and outputting a final seismic source plane position and confidence ellipse parameters during convergence. According to the invention, rapid and accurate positioning operation of a micro-seismic monitoring scene can be realized.

A laser vibration measuring instrument series reciprocating optical frequency modulation calibration method and device belong to the field of photoelectric measurement. The calibration device is mainly composed of a calibrated laser vibration measuring instrument, a first acousto-optic modulator, a second acousto-optic modulator, a lens, a first sinusoidal signal source, a second sinusoidal signal source, an FM signal source and a plane mirror. For the laser signal emitted by the laser vibration measuring instrument, the reversibility of the optical path is used, the "I" type optical path structure is used, the output frequency translation and modulation control of the laser vibration measuring instrument are realized by using the twice optical frequency modulation mode of the same group of optical devices combined with twice optical frequency translation, the laser Doppler effect caused by different vibration waveform values is simulated, the modulated laser is completely returned to the calibrated laser vibration measuring instrument along the original path, the change waveform of the frequency value is replaced by the change waveform of the vibration speed value, and the calibration of the laser vibration measuring instrument is realized. The present application has the advantages of portability, wide frequency range, wide amplitude range calibration, high precision and good stability.

The application discloses a method for generating a flat-top beam array, comprising the following steps: introducing a multi-Gaussian function and a hyperbolic function, superimposing the hyperbolic function, constructing a weight function and a kernel function with Gaussian distribution intensity based on the superimposed hyperbolic function and the multi-Gaussian function; introducing a partial coherent light construction formula, combining the weight function and the kernel function to obtain a cross-spectral density function of a multi-cosine multi-Gaussian correlation light field containing a multi-cosine function at a source plane; introducing a free space transmission formula, constructing an intensity expression of the multi-cosine multi-Gaussian correlation light field at an arbitrary transmission distance according to the cross-spectral density function of the multi-cosine multi-Gaussian correlation light field, that is, an expression of the multi-cosine multi-Gaussian correlation light field; adjusting the transmission distance and the parameters of the multi-cosine multi-Gaussian correlation light field to obtain a flat-top beam array with different numbers of rows and columns, and realizing an array form with adjustable flat-top sub-beams; and the application can effectively control the number of the flat-top beam array sub-beams.

The invention relates to a method for improving PDN impedance simulation efficiency. The method comprises the following steps: determining an initial coverage block diagram according to the distribution of a power supply plane and a target device; by taking the maximum distance between the adjacent power supply plane and the ground plane as a reference value, externally expanding the boundary of the initial coverage block diagram by 7 times of the reference value, and generating an optimized coverage block diagram; cutting the simulation model based on the boundary of the optimized coverage block diagram, and reserving a model part in the range of the optimized coverage block diagram; and simulating the cut model and acquiring an impedance curve of the target frequency band. According to the method, the initial coverage block diagram is determined by analyzing the power plane and target device distribution, a main power supply path and a peripheral key area are focused, the initial coverage block diagram is expanded by 7 times by taking the maximum distance between the adjacent power plane and the ground plane as a reference value based on an electromagnetic field distribution theory, and more than 99% of effective field intensity is ensured to be covered; the precision loss caused by model cutting is avoided, and the technical problem in complex PCB single board simulation is effectively solved.

The present invention relates to an imaging system and method for radiographic inspection. An imaging system for radiographic inspection comprises: an inspection area, including an imaging area; a first ray source assembly, all first target points of which are arranged in a first ray source plane; a first detector assembly, a plurality of first detector units of which are arranged in a detector plane, the detector plane being spaced apart from the first ray source plane by a predetermined distance along a direction of travel of an inspected object; and a ray source control device, which is configured to cause the first ray source assembly to simultaneously emit X-rays from at least two first target points to the imaging area when an area of ​​interest of the inspected object is at least partially located in the imaging area, wherein, among the at least two first target points of the first ray source assembly that simultaneously emit X-rays to the imaging area, the ray emission range of each first target point can cover the imaging area, and the first detector crystals corresponding to the ray emission ranges of any two first target points do not overlap with each other.

The invention provides a liquid crystal assembly and a display device. The liquid crystal assembly comprises a first liquid crystal layer and a second liquid crystal layer, and the first liquid crystal layer and the second liquid crystal layer are located on one side of the light-emitting face of the display panel and are sequentially arranged in the direction away from the display panel. In the first working mode, the first liquid crystal layer works in a first liquid crystal prism state, the second liquid crystal layer works in a second liquid crystal prism state, and equivalent focuses of the first liquid crystal layer and the second liquid crystal layer fall on a display image source plane; and in the second working mode, the first liquid crystal layer works in a liquid crystal lens state, the second liquid crystal layer works in a third liquid crystal prism state, and the equivalent focus of the second liquid crystal layer falls on the display image source plane. The liquid crystal assembly can effectively reduce the visible degree of BS in a display product, improves the overall display effect of the display product, can give consideration to light field 3D and double-viewpoint 3D display modes, and improves the compatibility and applicability of the liquid crystal assembly.

The present application relates to an imaging system for radiographic examination. Disclosed is an imaging system for radiographic examination, comprising: a first radiation source assembly comprising a plurality of radiation sources; a second radiation source assembly comprising a plurality of radiation sources, target points of all the radiation sources of the first radiation source assembly being arranged in a first radiation source plane, and target points of all the radiation sources of the second radiation source assembly being arranged in a second radiation source plane; a plurality of first detector units arranged in a first detector plane; a plurality of second detector units arranged in a second detector plane; and a detector support, the plurality of first detector units and the plurality of second detector units being both mounted on the detector support, wherein the first radiation source plane, the second radiation source plane, the first detector plane and the second detector plane are sequentially distributed along a travel direction.

The invention relates to a multi-spot optical system and a method of use. The present disclosure provides an optical system, a semiconductor processing system, and a method for processing a semiconductor wafer. In one example, the optical system includes: (1) a light source configured to provide source light to a source plane to form a plurality of first sub-beams; (2) an optical element configured to modify each of the plurality of first sub-beams according to a predetermined pattern to form a plurality of interrogation spots on a wafer, wherein the optical element is further configured to modify each of the plurality of first sub-beams after reflection from the wafer to form a plurality of second sub-beams on an image plane; and (3) a spectrometer configured to receive collected light from the plurality of second sub-beams.

This application belongs to the field of light field display technology, specifically disclosing a rigorous scalar light field calculation and solution method and system. It includes: obtaining the complex amplitude distribution on the source plane; and calculating the rigorous scalar light field distribution on the observation plane based on rigorous scalar diffraction theory and the complex amplitude distribution on the source plane. Based on scalar diffraction theory, this application constructs a light field propagation model for arbitrary propagation distances, avoids approximation errors in geometric correction methods through a rigorous scalar light field propagation method, overcomes the propagation distance constraints of the scalable angular spectrum propagation model, and achieves Abbe diffraction-limited resolution through a phase retrieval algorithm.

The invention discloses a single-layer reflective array antenna adopting electric resonance and magnetic resonance units to realize four-beam independent control, which comprises a plane reflective array and a K and Ka dual-band dual-circularly polarized feed source arranged opposite to the plane reflective array, and the plane reflective array consists of a plurality of units consisting of K and Ka band elements which are periodically nested and arranged. The dual-band element structure is designed based on the principles of electric resonance and magnetic resonance, so that the elements of two frequency bands have an extremely weak coupling characteristic, and rapid design of the reflective array antenna is facilitated; meanwhile, each wave band element can realize phase regulation and control through two degrees of freedom of size change and angle rotation, so that independent regulation and control of four circularly polarized wave beam directions on two wave bands are realized. The reflective array antenna is simple in structure, low in cost, easy for engineering realization, and suitable for application scenarios of multi-beam independent regulation and control.

The invention discloses a method and a system for calculating a fire envelope temperature field of a large-span space structure. The method comprises the following steps: reading fire scene parameters, a geometric position of a fire source area and a steel member node file; establishing a fire source plane polygon according to the geometric position of the fire source area, and calculating the horizontal projection distance and the vertical distance between each component node and the fire source and the distance between the center of the ignition source and the steel component; according to the fire scene parameters and the distance, an empirical formula library is called in parallel, and the smoke temperature time history of each steel member node is obtained; according to the smoke temperature time history, the flame geometric parameters and the component thermal parameters, the component temperature time history is iteratively calculated step by step; in all fire scenes, the highest temperature and the scene corresponding to the highest temperature are taken for each component node, and an envelope temperature field is generated; and outputting the temperature time history, the envelope temperature field and the scene extreme value to a storage medium. According to the method, the calculation precision, the calculation efficiency and the engineering operability are considered, and the overall fire-resistant safety evaluation requirement of the large-span space structure is met.

The present invention discloses a circularly polarized integrated feed transmission array antenna based on a degenerate mode waveguide, comprising an array face and a planar feed located below the array face, wherein the phase center of the planar feed coincides with the focus of the array face. The array face comprises multiple array face units, each of which comprises an upper section, a middle section, and a lower section. The upper section and the lower section are located at both ends of the middle section in a mirror-image manner and each has a horn-shaped opening structure with a linearly gradient inner diameter. The multiple array face units include multiple types of array face units, and the inner diameters of the middle sections of different types of array face units are different. The array face simultaneously meets the requirements of the Fermat principle and circularly polarized radiation. The planar feed is a differentially fed planar aperture antenna, comprising a feeding structure for feeding, a waveguide, a horn-shaped waveguide, a rectangular cavity, and a patch structure located within the rectangular cavity, wherein the patch structure is connected to the horn-shaped waveguide. The array face does not require the introduction of dielectric materials, and the use of a planar aperture antenna as a feed source can make the entire transmission array antenna have a high aperture efficiency.

The invention discloses a method and equipment for simulating amplitude and phase distribution of any target scattered wave on a Cassegrain antenna and a medium. Establishing a coordinate system by taking the vertex of the reference paraboloid as an original point, generating an incident ray equation according to a target coordinate and a scattering angle, and solving an intersection point and a normal direction of the incident ray equation and a main reflecting surface; reflected light rays are obtained by using a reflection law, and intersection points of the reflected light rays and a feed source plane are solved; the amplitude attenuation of each beam of light reaching the feed source is calculated according to the inverse ratio of the square of the optical path, the phase is calculated according to the linear relation of the optical path, and a complex phasor is generated; superposing multiple beams of scattered light complex phasors of the same target to obtain feed source aperture surface synthesis amplitude phase distribution; and the antenna directional diagram can be quickly generated by traversing the polar angle through the fixed polar radius. The whole process is grid-free and iteration-free and is completed in milliseconds, the precision is consistent with the geometric optical limit, real-time calculation can be realized on common hardware, and the antenna design, test and calibration periods are remarkably shortened.

Disclosed is an illumination system for an interferometer, comprising: a system light source; the steering mirror assembly is used for receiving and reflecting the system light in at least two orthogonal directions; the tracking mechanism is used for tracking the angular orientation of the steering mirror assembly in the two orthogonal directions and providing an electronic signal representing the angular orientation; the focusing lens assembly is used for focusing the system light reflected away from the turning lens assembly to a focusing light spot on a two-dimensional plane corresponding to a source plane of the interferometer; and an electronic controller operably coupled to the steering mirror assembly and configured to cause the focused spot on the source plane to follow a predetermined motion trajectory.

The present invention discloses a method for calculating the scattering characteristics of a blue-green laser after passing through a ship bubble wake. The method comprises the following steps: Step 1: Based on the light field function expression of a Bessel-Gaussian beam in the source plane, the electric field components of the Bessel-Gaussian beam in the xyz directions in a spatial rectangular coordinate system are obtained; Step 2: The radial components of the electric and magnetic fields of the Bessel-Gaussian beam in a spherical coordinate system are solved; Step 3: The beam factor in the transverse magnetic and transverse electric modes is solved based on the radial components of the electric and magnetic fields obtained in Step 2; Step 4: The expanded field of the Bessel-Gaussian beam scattered by a single spherical particle is solved using the generalized Lorentz Mie theory; Step 5: The electric field of the Bessel-Gaussian beam scattered by a ship bubble wake is solved; Step 6: The scattering characteristics are solved using the obtained scattered electric field. This method can be used to analyze the scattering characteristics of a blue-green laser after being scattered by a ship bubble wake and has important reference value for rationally selecting beam parameters to improve transmission quality and ship wake identification.

Embodiments disclosed herein include a semiconductor structure. The semiconductor structure may include a first power plane electrically connected to a first plurality of via-to-backside power planes (VBPPs), a second power plane, and a plurality of pass through vias electrically connecting the second power plane to a second plurality of VBPPs, wherein the plurality of pass through vias pass through the first power plane.

An optical lens assembly includes, in order from a visual side to an image source side: a first group including a first lens group and an optical element, and the optical element including, in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer and a first phase retarder; a second group including, in order from the visual side to the image source side: a second lens group with positive refractive power and a partial-reflective-partial-transmissive element; and a third group including, in order from the visual side to the image source side: a second phase retarder and an image source plane. When the optical lens assembly satisfies certain conditions, the weight of the device can be reduced, the zooming function can be provided, and the image quality can be ensured.

The invention relates to the technical field of precision optical measurement, and discloses a double-frequency heterodyne three-axis grating ruler. The device mainly comprises a double-frequency orthogonal polarization light source, a plane mirror, a combined grating, a two-dimensional reflection grating, a one-dimensional grating, a polaroid, a quarter-wave plate, a half-wave plate, a heterodyne photoelectric conversion unit and a signal acquisition and processing device. The double-frequency light source generates S and P polarized light which are different in frequency and vertical in polarization, the S and P polarized light enters the combined grating partition through the plane mirror to be diffracted, and X, Y and Z three-axis displacement signals are synchronously acquired in cooperation with a Littrow angle auto-collimation light path of the two-dimensional reflection grating. Y-axis displacement is obtained by heterodyne interference signals formed by beam combination of light returned by the two-dimensional reflection grating in the position space of the one-dimensional grating, and X-axis displacement and Z-axis displacement are obtained by joint calculation of interference signals diffracted and separated by the combined grating. The system is symmetrical in light path, compact in structure, quasi-common in light path, capable of effectively restraining environment temperature excursion and mechanical vibration, and suitable for multi-degree-of-freedom high-precision positioning measurement.

The application relates to the technical field of sound field reconstruction, and particularly discloses a complex sound field reconstruction method and system based on a physically constrained diffusion model, which comprises the following steps: adopting a complex sound pressure form to represent a source plane complex sound field as an original clean sample of a diffusion model; gradually injecting Gaussian noise into the source plane complex sound field to construct a forward diffusion process, and training a conditional denoising network to predict corresponding noise components under the condition of a given diffusion time step and a target plane amplitude; using the predicted noise components of the conditional denoising network to back-propagate a clean sample estimation corresponding to the current time step, reconstructing the clean sample estimation into a complex field form to obtain a source plane complex sound field estimation; introducing an angular spectrum method as a display acoustic propagation model, inputting the source plane complex sound field estimation into the acoustic propagation model for propagation calculation to obtain a reconstructed complex sound field of the target plane. The application realizes stable prediction of a source plane complex amplitude hologram by modeling a conditional distribution in a high-dimensional continuous complex field space.

The invention relates to a packaging substrate optimization method, computer equipment and a storage medium, and the method comprises the steps: providing an initial packaging substrate which comprises a layer-adding wiring layer and a semiconductor chip electrically connected with the layer-adding wiring layer, the layer-adding wiring layer comprises a signal layer, and a power supply plane layer and a ground plane layer which are respectively positioned on two opposite side surfaces of the signal layer, the signal layer comprises a plurality of signal lines, the power supply plane layer comprises a plurality of reference power supply planes, the ground plane layer comprises a reference ground plane, and the semiconductor chip is electrically connected with the corresponding signal lines in the layer-adding wiring layer; obtaining a target power supply plane, wherein the target power supply plane is at least one reference power supply plane which has the greatest influence on the signal far-end crosstalk resonance; replacing a part of the target power supply plane with a reconstructed ground plane, and electrically connecting the reconstructed ground plane with a reference ground plane in the layer-adding wiring layer through a backflow ground hole to form the packaging substrate. Far-end crosstalk is reduced, and signal integrity is improved.