83 results about "Angular resolution" patented technology

The invention relates to a high-angular-resolution atmospheric detection laser radar acquisition and control system, and belongs to the technical field of atmospheric detection laser radar data acquisition. The system comprises an ARM main control module, an acquisition card and a scanning module, wherein the ARM main control module is internally provided with a multi-core CPU (Central Processing Unit), and when the system runs, a data reading process, a data processing process and a data storage process are respectively distributed to different cores of the multi-core CPU for parallel execution; the ARM main control module is used for issuing an instruction to the acquisition card and reading a hardware accumulation result of the acquisition card for processing and storing; the scanning module is controlled by the ARM main control module to perform continuous scanning; and the acquisition card is used for performing high-angle-resolution acquisition on aerosol observation data obtained in the continuous and rapid scanning process of the scanning module according to an instruction of the ARM main control module. According to the invention, the real-time monitoring capability of aerosol space-time distribution in a complex atmospheric environment is improved.

The invention relates to the field of edge calculation, and discloses a micro-nano unmanned aerial vehicle edge end data preprocessing system, which comprises a state space discretization mapping module used for collecting three-axis attitude data output by an inertial measurement unit, and quantitatively mapping the three-axis attitude data to a three-dimensional discrete coordinate system according to a preset angular resolution step length to generate an attitude grid index; the visual fingerprint extraction module is used for acquiring original image data and calculating a current global feature hash value; and the index arbitration logic control module is used for querying a preset background feature lookup table based on the attitude grid index, and generating a wake-up instruction to activate a rear-end depth reasoning unit when the Hamming distance between the current global feature hash value and the reference value is greater than a sudden change judgment threshold value. The coupling relation between the fuselage movement and the environment change is stripped, and low-power-consumption accurate awakening of the edge end under the dynamic non-stable working condition is achieved.

The invention discloses a rapid forward modeling method for a gravity field of a rectangular coordinate system based on an isoparametric transformation global discrete grid, and belongs to the technical field of geophysical exploration. According to the method, a measuring network composed of dggrid grids is manufactured to cover the whole measuring area range by selecting the measuring network forming form and the side length, the exploration depth is selected as D, the dggrid grids extend to the ground by an n < z + 1 > layer to form dggrid units of an n < z > layer, and the corresponding thickness of the dggrid units is D / n < z >. And calculating the abnormal response of all the dggrid units at each observation point by utilizing isoparametric transformation based on a dggrid unit interpolation type function, an integral point and an integral weight coefficient obtained by a hexagonal prism integral formula. Compared with a square grid, the dggrid grid has excellent angular resolution, the discrete distance measurement of the dggrid grid is better close to the Cartesian distance, and the dggrid grid also has the advantage of displaying uniform and clear adjacency. Compared with conventional direct calculation, the rectangular coordinate system gravitational field forward modeling based on the isoparametric transformation global discrete grid has extremely high acceleration potential.

The invention discloses a multi-mode adaptive weight SLAM method and system for a construction site. The method comprises the steps that a mapping model is established through sensor joint calibration, laser radar, camera and IMU data are synchronously collected through hardware, and dynamic filtering, distortion compensation and feature extraction are carried out on point clouds and images; the voxel entropy, the angular resolution and the feature density are calculated in real time to evaluate the degradation degree of each mode, and a visual residual error is dynamically adjusted by adopting an adaptive weight and frame skipping mechanism to ensure reasonable information injection in a degradation scene; iMU pre-integration, LiDAR point-surface residual errors and weighted visual reprojection residual errors are sequentially fused in an incremental Kalman sliding window frame, an automatic repositioning strategy is matched, and a high-precision pose and dense color point cloud map is output. According to the method, calibration, synchronization, degradation detection, sliding window optimization, map release and relocation are integrated, and the mapping precision and robustness can be remarkably improved under the complex working conditions of dust shielding, illumination variation, dynamic obstacles and the like.

The invention discloses a resolution-oriented 4D millimeter wave radar antenna array and physical layout collaborative optimization method, a program, equipment and a storage medium, which are suitable for a radar system with a limited space and a multi-chip structure. The method comprises the steps of firstly collecting system input parameters; then, an antenna design constraint model is constructed, spatial discretization is carried out, and an optimizable matrix model is formed; transmitting and receiving array structures in the azimuth angle direction and the pitch angle direction are jointly designed through a virtual array mapping strategy, so that the requirements of MIMO mapping efficiency maximization and target angle resolution are met. After an antenna structure is determined, an optimization objective function is further constructed based on strong constraint and soft constraint, and an antenna layout scheme which meets the manufacturing requirements and has optimal performance is obtained through a traversal and search method. According to the method, the virtual aperture can be effectively improved, the antenna number redundancy is reduced, the wiring accessibility is optimized, and the resolution and engineering realizability of a 4D radar system are enhanced.

The invention relates to a sensor unit (20) for detecting forces and their directions in the XY plane, comprising at least two sensors distributed on a mechanical measuring body (10). According to the invention, the at least two sensors are surface acoustic wave (SAW) sensors (24), wherein one or more milled grooves (22) are formed in the surface of the measuring body (10) for controlling the propagation of surface acoustic waves, and wherein the SAW sensors (24) are arranged on the measuring body (10) such that a precise determination of the direction and magnitude of the acting forces in the XY plane is enabled.

The application discloses an optical lens, which comprises, along an optical axis from an object side to an imaging surface, a first lens with negative focal power, the image side of which is a concave surface; a second lens with negative focal power; a third lens with positive focal power, the object side of which is a convex surface, and the image side of which is a concave surface; a fourth lens with positive focal power; a fifth lens with positive focal power, the object side of which is a convex surface, and the image side of which is a convex surface; a sixth lens with positive focal power, the object side of which is a convex surface; and a seventh lens with negative focal power. The optical lens adopts seven lenses, and through specific surface shape setting and reasonable focal power distribution, especially the first and second lenses adopting negative focal power, the optical lens can collect a large range of light, improve the field angle of the optical lens, and effectively improve the edge field proportion and the angle resolution of the edge field through setting the optical lens with large positive distortion.

This invention relates to an ophthalmic lens and its manufacturing process. The ophthalmic lens includes a lens body, which comprises a central region and an auxiliary region surrounding the central region. The auxiliary region contains a plurality of scattering clusters formed by translational shifts according to a preset period. Each scattering cluster is composed of multiple microstructures arranged according to a spatial lattice configuration. This invention, by first combining multiple microstructures into scattering clusters and then using these clusters to fill the auxiliary region, can, on the one hand, enhance the scattering of incident light in other directions, reducing the angular resolution of the luminescent object; on the other hand, it can ensure the uniformity of the entire scattering cluster by utilizing multiple microstructures arranged according to a spatial lattice configuration, further providing a basis for the optimization of myopia glasses.

The application discloses an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with negative optical power, the object side of which is a concave surface and the image side of which is a convex surface; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; and a seventh lens with negative optical power. The optical lens adopts seven lenses, and through specific surface shape setting and reasonable optical power distribution, especially the first and second lenses adopting negative optical power, the optical lens can collect a wide range of light, improve the field of view angle of the optical lens, and effectively improve the edge field of view ratio and the angle resolution of the edge field of view through setting the optical lens with large positive distortion.

A light-emitting assembly, an optical system, and a LiDAR (100). The light-emitting assembly comprises a plurality of regions. Within a light emission cycle of the light-emitting assembly, in a first direction, a certain region among the plurality of regions comprises light-emitting regions and non-light-emitting regions that are continuously arranged, wherein an emission angle of irradiation from the light-emitting regions to an object space is less than the minimum angular resolution of a corresponding receiving assembly. The present application can be applied to intelligent vehicles or electric vehicles, and helps to realize super-resolution that exceeds the minimum angular resolution of the receiving assembly.

The present invention provides a method for inspecting angular resolution of a LiDAR device, comprising the steps of: preparing and arranging a LiDAR device to be inspected and a target; rotating, for each rotation step, the LiDAR device to be inspected, and allowing the LiDAR device to be inspected to record at least one frame in each rotation step, and calculate a point cloud on the basis of the recorded frame; selecting a plurality of data points in the calculated point cloud; acquiring intensity data in at least a part of the rotation steps for each of the selected data points; and determining, on the basis of the acquired intensity data and rotation angles in the rotation step at which the intensity data is acquired, angular resolution of the LiDAR device to be inspected, wherein the target includes a first portion and a second portion, and the reflectivity of each of the first portion and the second portion is different.

The invention discloses an optical lens and a laser radar. The maximum full field angle of the optical lens is within the range of 8-35 degrees, and the angular resolution value AR05 of any position of the half field angle of the optical lens within the range of 0-5 degrees and the angular resolution value ARS of the maximum half field angle of the optical lens meet the condition that AR05 is smaller than or equal to 86.2% ARS.

The present invention provides a method for inspecting the angular resolution of a LiDAR device, comprising the steps of: preparing a LiDAR device to be inspected and at least one target; rotating, in N steps, the LiDAR device to be inspected, in the azimuth direction or altitude direction, and recording, at each rotation angle of the N steps, a plurality of frames for the target through the LiDAR device to be inspected; selecting, from the frames, at least one data point among data points calculated by the LiDAR device to be inspected; and determining, on the basis of the selected data point, the angular resolution of the LiDAR device to be inspected.

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens, the first lens having negative optical power, a first side of the first lens being a convex surface, and a second side of the first lens being a concave surface; a second lens, the second lens having positive optical power, a first side of the second lens being a convex surface, and a second side of the second lens being a convex surface; a third lens, the third lens having negative optical power, a second side of the third lens being a concave surface; a fourth lens, the fourth lens having positive optical power, a first side of the fourth lens being a convex surface, and a second side of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive optical power, a first side of the fifth lens being a convex surface; and a sixth lens, the sixth lens having positive optical power, a first side of the sixth lens being a convex surface. The application solves at least one of the problems of low relative luminance, poor resolving power, strong ghost image and small angular resolution in the prior art.

The invention discloses a digital holographic lithography method based on light source phase coding and binary mask collaborative optimization, which comprises the following steps: 1, applying preset light source phase coding to an incident light field, and carrying out collaborative modulation with a binary amplitude mask to obtain a mask transmission light field; 2, propagating the transmission light field to a wafer plane by adopting an angular spectrum propagation model to obtain a wafer surface reproduction light field; 3, constructing a joint optimization function of the wafer surface light field intensity and a target graph, and carrying out collaborative optimization on a light source phase encoding parameter and a mask binarization structure parameter; and 4, performing holographic photoetching exposure and development based on an optimization result, and forming a high-resolution angular interference pitch line pattern on the surface of the wafer. By means of light source-mask collaborative coding, a traditional complex three-dimensional mask is simplified into a binary amplitude mask, the mask machining difficulty and manufacturing cost are reduced, meanwhile, the wafer surface angular resolution is effectively improved, and a feasible technical scheme is provided for a high-bandwidth digital holographic photoetching system.

The invention discloses a flight device and an image construction method and device.The flight device comprises a first camera module which is arranged at the lower end of the flight device and used for collecting a first image, and the first image comprises a flight device lower image which is shot by the first camera module and comprises ground scenery; the second camera module is arranged at the upper end of the flight equipment and used for collecting a second image, the second image comprises an image, which is shot by the second camera module and comprises sky scenery, above the flight equipment, the first image and the second image are spliced to obtain a third image, and the third image is a panoramic image; wherein the first camera module has a first angular resolution, the second camera module has a second angular resolution, and the first angular resolution is different from the second angular resolution.

The present disclosure provides an optical waveguide device used in a laser detection and ranging system (lidar). The optical waveguide device includes: a waveguide inlet configured to receive a first light signal; a waveguide body configured to guide the first light signal to transmit in the optical waveguide device; and a waveguide outlet configured to output a second light signal exited after the first light signal is guided; a ratio of the area of the waveguide inlet to that of the waveguide outlet is greater than a first preset ratio, and transmission efficiencies of the optical waveguide device in first and second directions are different, the transmission efficiency in the first direction is greater than a first threshold, the transmission efficiency in the second direction is less than a second threshold. With this optical waveguide device, effects of long measurement distance, high angular resolution and small volume can be achieved.

The application discloses an optical lens, which comprises, along an optical axis from an object side to an imaging surface, a first lens with negative focal power, the object side of which is a convex surface and the image side is a concave surface; a second lens with negative focal power, the object side of which is a concave surface; a third lens with positive focal power, the image side of which is a convex surface; a fourth lens with positive focal power; a fifth lens with positive focal power, the object side of which is a concave surface and the image side is a convex surface; a sixth lens with positive focal power, the object side of which is a convex surface and the image side is a convex surface; and a seventh lens with negative focal power, the object side of which is a concave surface. The optical lens adopts seven lenses, through specific surface shape setting and reasonable focal power distribution, especially the first and second lenses with negative focal power, so that the optical lens can collect a wide range of light, improve the field of view angle of the optical lens, and effectively improve the edge field of view ratio and the angle resolution of the edge field of view through setting the optical lens with large positive distortion.

The invention relates to a multi-degree-of-freedom optical path focusing mechanism and a low-temperature sample stage, and relates to the technical field of ultrahigh vacuum experiment equipment, and the multi-degree-of-freedom optical path focusing mechanism comprises a base module which is of an integrated plate-shaped structure; the sample seat control module can realize linkage control of a sample seat on three translational degrees of freedom of x, y and z and a polar angle rotational degree of freedom; the sample seat supporting module is used for supporting a sample seat in a sample transferring or changing process; the ellipsoidal mirror control module can realize control of the ellipsoidal mirror on three translational degrees of freedom of x, y and z and two rotational degrees of freedom of a tilt angle and a polar angle; wherein the sample seat control module and the ellipsoidal mirror control module are spatially arranged in parallel. According to the invention, the focusing light wave band range can be expanded, the light spot stability can be improved, the worm and gear driven sample table top interior angle rotation function is integrated, and the requirements of advanced condensed state physical research on broadband, high flux and high precision angle resolution photoelectron spectroscopy experiments are met.

An antenna array, transceiver, radar, and terminal are disclosed, applicable to the field of detection technology. The antenna array includes M receiving antennas and N transmitting antennas. The M receiving antennas are arranged in a non-uniform row. Of the N transmitting antennas, L are arranged in the same row, and H of these transmitting antennas are positioned differently along the column direction. Furthermore, at least one additional transmitting antenna is provided outside the L transmitting antennas, spaced from the L transmitting antennas in the same row along the column direction by a first value, where the first value falls within the range [0.5λ, 1λ]. The antenna array arrangement design of this embodiment significantly improves the angular resolution of the antenna array in both azimuth and elevation dimensions, and provides a large field of view in both directions, as well as high sidelobe suppression. This application also provides a transceiver, radar, and terminal incorporating this antenna array.

According to the large-view-field and high-precision space debris wide-area detection optical system provided by the invention, the afocal optical system adopts a total reflection form, so that a relatively large aperture can be realized, and the detection capability and the angular resolution of the system are improved; in addition, the large-view-field optical system adopts a transmission form, so that a large view field can be realized, and the system efficiency is improved; moreover, when the system works in a large view field mode, the view field angle can reach more than 20 degrees, the monitoring efficiency can be improved, when the system works in a large aperture mode, the entrance pupil diameter can reach more than 300 mm, and tiny space debris can be monitored, so that the monitoring precision is improved. Meanwhile, the whole system adopts a set of detector system, so that the cost and the weight of the optical system are reduced.

The invention discloses optical display equipment, a preparation method of the optical display equipment and a head-up display system. The optical display device includes: a display structure; the display structure comprises a color filter layer, an upper polaroid and a grating structure; the upper polaroid is arranged on one side of the light emitting surface of the color filter layer; the grating structure is arranged between the color filter layer and the upper polaroid or arranged on one side, far away from the color filter layer, of the upper polaroid, and is used for changing the propagation direction of emergent light rays and dividing the emergent light rays into left eye imaging light rays and right eye imaging light rays with different angles to be emitted. According to the technical scheme, the display structure and the grating structure are arranged in the optical display device, the grating structure is arranged on the light-emitting face side of the color filter layer or arranged on the side, away from the color filter layer, of the upper polaroid, design of a 3D display screen with higher angular resolution is better facilitated, and the degree of freedom of optical design is improved.

The invention discloses a vehicle-mounted millimeter wave radar DML super-resolution angle measurement method, system and platform based on a pre-stored projection matrix and secondary search, and the method comprises the steps: converting the most time-consuming matrix inversion and multiplication in an algorithm into offline completion through pre-generating and storing a projection matrix lookup table required by a DML algorithm; and a secondary search strategy based on a DBF result is combined, so that when the vehicle-mounted millimeter wave radar performs super-resolution angle measurement, real-time complex operation can be replaced by direct table look-up, and fine search is performed in an extremely small angle region, thereby reducing the calculation complexity by one to two orders of magnitude on the premise of ensuring that the angular resolution is doubled, and improving the accuracy of the super-resolution angle measurement of the vehicle-mounted millimeter wave radar. The load and the operation time of a processor are obviously reduced, so that the DML which is a high-performance super-resolution algorithm can be applied to a vehicle-mounted platform with limited computing power in real time.

A multiview 3D image encoding method, apparatus, system and storage medium are provided. The encoding method may include the steps of acquiring image data, and obtaining depth information containing a depth value of each pixel in an image based on the image data; grouping the image data into blocks, and calculating a perceived angular resolution of each object in blocks based on the depth information of each object in blocks respectively, where the perceived angular resolution of an object in blocks is a required maximum angular resolution that enables identification of the object in blocks; and configuring a respective encoding parameter for each object in blocks based on the perceived angular resolution of a respective one object in blocks, where the encoding parameter is configured such that a requirement of respective encoding parameter for a respective object in blocks with a respective perceived angular resolution is met.

The invention discloses a high-capture-rate target detection method and device based on a traffic radar, and a storage medium, and relates to the technical field of radar data processing. The method comprises the following steps: dividing a detection matrix into a first region and a second region; performing beam forming and detection on the second area, detecting the first area, fusing detection results, and outputting a preliminary detection point cloud; generating a speed hypothesis based on the initial detection point cloud, and generating multiple groups of candidate signals; performing angle estimation processing on each group of candidate signals based on a difference virtual array principle; calculating the peak amplitude of each angle spectrum, and taking the angle value corresponding to the angle spectrum with the maximum peak amplitude as a correction angle; cross-frame matching and speed ambiguity resolution processing are carried out on fast and slow frame point clouds which are alternately generated by a radar according to a specific time sequence and have different beam types. The method solves the problems that in traffic radar detection, the far-field angle resolution is insufficient, information is inaccurate due to speed ambiguity, and point cloud matching fusion is difficult.

An MIMO array sparse rapid design method of a fuzzy function generator based on deep learning comprises the following steps: firstly, directly learning a fuzzy function mapping relation corresponding to virtual array configuration and an incident angle by using a deep learning model so as to replace a traditional analysis fuzzy function calculation process depending on a manifold matrix; and then performing efficient performance evaluation on the candidate sparse array based on the fuzzy function generator, and obtaining a sparse array structure meeting the requirements of high resolution and low sidelobe in combination with an optimization strategy. By means of the technology, acceleration of more than 35 times can be achieved on the premise of not explicitly calculating the fuzzy function, the fuzzy function prediction root mean square error (RMSE) lower than 0.1 is kept, and therefore the sparse array design time is greatly shortened. Experiments on a 2T4R K-band MIMO radar prove that the designed array achieves 10 dB sidelobe level in a 100-degree field of view, the angular resolution is improved by about 32.8%, and the effectiveness and engineering application value of the method in high-resolution MIMO sparse array design are proved.

A computer-generated holographic (CGH) display system is described which has an angular resolution at a viewing position and a limiting aperture width. The CGH visualisation system comprises: an illum

A light field image processing method, a light field image encoder and decoder, and a storage medium are provided. The light field image processing method includes: a light field image decoder parsing a code stream, so as to obtain an initial sub-aperture image; inputting the initial sub-aperture image into a super-resolution reconstruction network, and outputting a reconstructed sub-aperture image, wherein the spatial resolution and the angular resolution of the reconstructed sub-aperture image are both greater than the spatial resolution and the angular resolution of the initial sub-aperture image; and inputting the reconstructed sub-aperture image into a quality enhancement network, and outputting a target sub-aperture image.

The application discloses an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, the image side of which is a concave surface; a second lens with negative optical power; a third lens with positive optical power, the image side of which is a convex surface; a fourth lens with positive optical power; a fifth lens with positive optical power, the object side of which is a convex surface, and the image side of which is a concave surface; a sixth lens with positive optical power; and a seventh lens with negative optical power. The optical lens adopts seven lenses, and through specific surface shape setting and reasonable optical power distribution, especially the first and second lenses adopting negative optical power, the optical lens can collect a wide range of light, improve the field of view angle of the optical lens, and effectively improve the edge field of view ratio and the angle resolution of the edge field of view through setting the optical lens with large positive distortion.

The invention discloses a high-resolution and high-flux small-angle scatterometer which comprises a focus lens which is an ellipsoid multilayer film focus lens, the optical surface shape of the focus lens is determined by an ellipsoid, and a light source and a detector are arranged at the positions of a first focus and a second focus of the ellipsoid respectively. The focusing lens focuses the X-ray from the light source to the light sensing plane of the detector, and the focus of the straight-through light falls on the plane of the detector. According to the invention, the ellipsoid multilayer film focus lens is introduced to form a confocal light path, and the light source and the detector are respectively located at two focuses of the ellipsoid. Photons cut off by a traditional slit are actively collected, focused and utilized, and the luminous flux is greatly improved while the high resolution is kept; the light spot size d is matched with the pixel size of the detector, so that the light spot size d is controlled, and the light spot size d cooperates with the distance L to determine the angular resolution. In this way, the resolution performance of the device can be precisely customized, and the angular resolution and the incident luminous flux can be improved at the same time.