57 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 belongs to the technical field of information optics, and relates to a method and device for generating a partially coherent self-repairing light beam based on spectrum modulation, and the method comprises the steps: constructing a cross-spectral density function of the partially coherent light beam on a spectrum plane based on a Schell model correlation function and an amplitude function of the partially coherent light beam on the spectrum plane; constructing a cross-spectral density function of the partially coherent light beams on a source plane based on the cross-spectral density function and the kernel function of the spectrum plane; converting the cross spectral density function of the source plane into an ensemble average function of a partially coherent beam field; based on the cross spectral density function of the source plane and the ensemble average function of the partially coherent light beam field, obtaining a field implementation function of the partially coherent light beam; generating a plurality of random complex fields meeting the Schell model correlation function, and respectively inputting the plurality of random complex fields into the field implementation function to obtain a plurality of output fields; and coding the plurality of output fields to generate a plurality of holograms, and modulating the laser to be modulated based on each hologram to obtain a partially coherent self-repairing beam.

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.

A dual-frequency and dual-circularly-polarized transmit-array antenna with independently controllable beams includes a planar broadband circularly polarized feed array and a planar transmit-array, the planar broadband circularly polarized feed array being placed near a focal plane of the planar transmit-array. The planar broadband circularly polarized feed array includes K-band left / right-handed circularly polarized feeds and Ka-band left / right-handed circularly polarized feeds that are integrated in the same plane. The planar transmit-array includes K-band and Ka-band dual-circularly-polarized phase shifting cells that are periodically staggered in a shared-aperture manner and based on an architecture of receiving antenna-phase shifting stripline-transmitting antenna. The antenna realize independent adjustment of right-handed and left-handed circularly polarized transmit phases in the K-band and the Ka-band, and it possesses the advantages such as miniaturization, low profile, and easy integration, and so on, thus having significant application prospects in fields such as satellite communications.

The invention discloses a design method for realizing a virtual polarization element, relates to the field of optical device design, and aims to solve the problems of large size, difficulty in integration and limited regulation and control capability of a traditional polarization device. According to the method, a virtual polarization function (including a Jones matrix and an additional phase) is preset on a target plane, a plane wave weighting factor is solved through high-dimensional Fourier transform, and source plane light field distribution is generated through superposition. The metasurface is used as a platform, and accurate mapping from a source plane Jones matrix to a device structure is realized by adjusting geometric parameters of a nanostructure and combining a double-matrix holography. According to the design scheme, a polarization state with controllable spatial distribution can be generated as required in a two-dimensional plane at any propagation distance, and additional phase information can be flexibly superposed, so that the flexibility, precision and integration capability of light field regulation and control are remarkably improved, and technical support is provided for applications such as new-generation lens-free imaging, polarization coding communication, light field synthesis and the like.

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.

The present application provides a plane fitting-based point cloud registration method and apparatus, and an electronic device. The method comprises: acquiring a source point cloud and a point cloud to be registered; then determining two non-parallel source planes in the source point cloud, and two non-parallel planes to be registered in the point cloud to be registered; on the basis of the two source planes and the two planes to be registered, performing calculation to obtain a rotation matrix, and obtaining a translation vector on the basis of the source point cloud and the point cloud to be registered; and finally, on the basis of the rotation matrix and the translation vector, rotating and translating the point cloud to be registered to achieve registration of the point cloud to be registered and the source point cloud. According to the present solution, registration is achieved on the basis of the correspondence between planes rather than local features of points, thereby greatly reducing the amount of calculation, and greatly reducing the sensitivity to noise.

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.

A system includes: an inverter, where the inverter includes: a power module, the power module including: a flexible layer including gate traces; a first substrate; a second substrate comprising a source plane and a gate plane separated from the source plane by a full trench, the source plane comprising a stepped trench, and the gate plane comprising an electrical connection through the gate trace of the flexible layer to a gate input connection of the power module; a semiconductor die disposed between the first substrate and the second substrate, the step trench being formed in a portion of the source plane corresponding to an edge of the semiconductor die, and the semiconductor die including a gate connected to the gate plane; and a sintered element disposed between the semiconductor die and the second substrate to connect the semiconductor die to the second substrate; a battery; and a motor.

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.

The present disclosure relates to a medical imaging system having an X-ray source, a detector and a processing system. The X-ray source is collimated to produce a diverging beam of radiation and transmits X-rays through an object. The detector includes detector pixels arranged in at least one row and is operative to receive the X-ray energy of the X-rays after having passed through the object. The processing system is programmed to select an initial height of the object with respect to the X-ray source plane and determine an initial time delayed summation (TDS) shift frequency based on the initial height. The processing system performs a first scan of the object based on the TDS shift frequency and determines a new height of the object based on a beam angle and an overlap of adjacent images. A new TDS shift frequency is determined based on the new height of the object if the initial height and the new height are not substantially same. The processing system then performs a second scan of the object based on the new TDS shift frequency. The processing system is further programmed to generate an image of the object based on detected X-ray energy at the X-ray detector based on the first scan and the second scan.

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 utility model provides a projection lens and an AR projection device, and the projection lens comprises two lenses which sequentially comprise a first lens with positive focal power from a projection surface to an image source surface along an optical axis, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power from the projection surface to the image source surface, the second lens has negative focal power and is an aspheric lens; an image source; wherein one side, close to or far away from the image source, of the first lens is provided with a diaphragm, and the total optical length TTL of the projection lens and the focal length f of the projection lens meet the following condition: TTL / flt, and 1.2, the projection lens is small in size and light in weight, the optical system comprises two lenses, the total length of the lenses is small, the size is small, and the number of the lenses is reduced, so that the light weight of an optical machine is also facilitated.

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 application discloses a virtual exit pupil micro-projection lens, which comprises a virtual diaphragm, a first lens, a second lens, a third lens, a fourth lens and an image source plane which are sequentially and separately arranged along the same optical axis from the imaging side to the image source side, wherein the first lens and the third lens both have positive focal power; the second lens and the fourth lens both have negative focal power; the effective focal length of the projection lens is EFL, the distance between the surface center point of the imaging side of the first lens and the image source plane is TTL, the distance between the virtual exit pupil center of the projection lens and the surface center point of the imaging side of the first lens is ENPP, and the virtual exit pupil diameter of the projection lens is ENPD, which satisfy the following relationship: the volume of the projection lens is small, the near-eye display effect is good, the use scene of the wearable device can be better adapted, and the use value of the product is improved.