18 results about "Multiple focus" patented technology

This invention discloses a method and device for processing dew point meter measurement data, relating to the fields of industrial automation measurement and control and fault diagnosis technology. It constructs a dynamically sensing window with variable shape to preprocess time-series data from the dew point meter, calculates fault probability entropy in real time, detects instantaneous anomalies, and combines a fault-window shape mapping library to determine the window shape and adaptively switch it to obtain anomaly identification results. A corresponding algorithm is selected from a correction strategy library to correct the anomaly. This invention constructs a dynamically sensing window with variable shape, driven by real-time calculated fault probability entropy, enabling adaptive switching between panoramic, sniper, and multi-focus shapes. Utilizing a built-in fault-window shape mapping library, it associates anomaly symptoms with fault physical mechanisms, separates multiple concurrent faults, infers root causes, and avoids decision space explosion. Based on the diagnostic results, it calls targeted algorithms from the correction strategy library to correct anomalies, forming an intelligent closed loop of identification-diagnosis-correction.

The application discloses a plane scanning ultrasonic phased array and relates to the technical field of ultrasonic phased array nondestructive testing. The application utilizes two linear array probes with perpendicular or large included angle array directions to perform cross scanning detection, forms multiple focus lines parallel to the probe plane and perpendicular to the array direction through focusing and deflection, wherein the transmitting probe generates a transmitting focus line, the receiving probe adjusts the focusing rule to generate a receiving focus line, the intersection of the transmitting focus line and the receiving focus line is the detection focus point, the intersection of the transmitting focus line group and the receiving focus line group forms a focus point array, thereby realizing full-area scanning of the detection plane. In the plane scanning process, only two linear array probes are needed to realize plane scanning, so that the cost is greatly reduced. Through active focusing at the transmitting end, post-focusing at the receiving end and cross scanning in the mode of non-point-by-point focusing, the detection plane can be quickly covered, so that the detection efficiency is improved while the cost is reduced.

This invention relates to the field of optical detection technology, specifically a multifocal parallel phase extraction and alignment system based on a spatial light modulator, comprising: a wavefront modulation module, a parallel detection module, an information extraction module, a parameter calculation module, and a correction and execution module. The wavefront modulation module loads a phase modulation pattern through a spatial light modulator, generating a complex wavefront containing multiple diffraction orders via the objective lens, forming multiple spatially separated detection focal spots on the sample surface. The parallel detection module receives the reflected light signals from each focal spot in parallel through an array detector. The information extraction module analyzes the signals and extracts the phase offset of each focal spot, constructing a mapping set between position and phase offset. The parameter calculation module calculates the tilt angle and field curvature distribution parameters based on this set. The correction and execution module generates a comprehensive correction signal to drive the objective lens or sample stage to perform multidimensional attitude adjustments. This system achieves multifocal parallel detection and synchronous parameter calculation, improving alignment efficiency and accuracy.

A method for multifocal energy gradient laser holographic cutting of hard and brittle materials includes the following steps: S1, determining the parameters of the incident beam and the high numerical aperture focusing objective; S2, determining the three-dimensional multifocal beam and parameters of the target hard and brittle material; S3, setting a two-dimensional linear phase distribution on the spatial light modulator plane as the initial phase for subsequent iterative calculations; S4, establishing a forward-backward propagation iterative loop based on phase optimization to calculate the multifocal holographic phase distribution; S5, superimposing a linear blazed grating phase on the multifocal holographic phase distribution, and generating a composite diffraction phase hologram using MATLAB code and inputting it into the spatial light modulator; achieving uniform holographic cutting with consistent actual absorbed energy in each layer. This invention features controllable three-dimensional focal positions, adjustable energy gradients along the depth direction at each focal point, strong deep-layer energy compensation capability, simultaneous aberration correction, and high consistency in cutting at different depths.

The present disclosure relates to a multi-focal head-up display (MHUD) system and method to solve a visual fatigue problem generated in a vehicle head-up display and implement an augmented reality (AR) function. The present disclosure provides a multi-focal augmented reality head-up display (MHUD) system including an image projector which generates and emits a plurality of beams, an optical device which guides the plurality of beams emitted from the image projector to individual paths, a polarization control device which controls polarization states of the plurality of beams incident from the optical device, and a plurality of holographic optical elements (HOEs) which receives the plurality of beams emitted from the polarization control device to project a virtual image plane at different focal distances.

The application relates to a multi-focal plane imaging defect detection method and a defect detection system. The defect detection method comprises the following steps: a first polarized light path and a second polarized light path are respectively irradiated to different regions of a beam splitter to obtain a plurality of sub-beams; the plurality of sub-beams are respectively focused on different axial depths of a wafer; reflected light is collected to form a plurality of detection lights which do not overlap with each other; the plurality of detection lights are respectively irradiated to different photosensitive areas of a detector, so that images of different focal planes are simultaneously imaged on different spatial positions of the detector to obtain focal plane images corresponding to the different focal planes; the plurality of focal plane images are geometrically corrected and pixel-aligned, and are stacked along an axial direction to form a data body, and three-dimensional spatial coordinates (xc, yc, zc) of defects are obtained through connected domain analysis. The defect detection system comprises an illumination module, a polarization module, a beam splitter, a micromirror array and a detector which are sequentially arranged along a light path. The application can determine the positions of defects.

A multifocal X-ray tube, a multifocal X-ray source, and a human body tomography device are provided. The multifocal X-ray tube includes a housing, a window, and multiple anodes. Multiple spaced-apart exit windows are provided on the front wall of the housing. The window covers the multiple exit windows to seal the housing. The anodes are located inside the housing and have multiple target point groups corresponding one-to-one with the multiple exit windows. Each target point group includes multiple target points, each target point receiving bombardment from a corresponding electron beam drawn from the cathode and generating an X-ray beam. The distance between two adjacent target points in each target point group is smaller than the distance between two adjacent target groups. The multiple X-ray beams generated by the multiple target points in each target point group are led out of the X-ray tube through the exit windows corresponding to the exit windows, and the radiation fields of all X-ray beams approximately overlap on a common plane outside the X-ray tube.

Disclosed are a multifocal point-ring spot generation system and a laser welding method in the technical field of laser processing. The system includes an annular light source, a first collimating lens, an annular beam generation module, and a first reflector arranged sequentially at intervals along a first straight-line direction, and a point light source, a second collimating lens, a first focusing lens, a multi-curvature hollow reflector, and a second focusing lens arranged sequentially at intervals along a second straight-line direction, where the multi-curvature hollow reflector and the second focusing lens are each provided with a through hole at their centers for allowing a beam emitted by the point light source to pass therethrough, and the multi-curvature hollow reflector has an adjustable mirror surface curvature. The system can solve the technical problems of high processing cost and poor stability in deep welding caused by structural constraints of point-ring lasers in the prior art.

The application discloses a dynamic resolution ultrasonic phased array haptic generation device and a control method, relates to the technical field of ultrasonic haptic feedback, and realizes the software adjustment of the ultrasonic haptic focus size through an EDM beam forming algorithm, thereby breaking through the limitation of the traditional DAS method which is limited by hardware. Users can dynamically select a high resolution mode or a high radiation force mode according to specific application scenarios, and the flexibility and reality of haptic interaction are significantly improved. The system structure is compact, all adjustments are completed through software, hardware does not need to be changed, and the system is convenient to integrate into intelligent automobile central control, AR / VR headgear, interactive exhibition stands and other equipment, so that more rich and adaptive haptic experiences are provided for human-computer interaction. Under the premise of not changing the hardware structure, the system optimizes the phases and amplitudes of all channels of the ultrasonic array through the software algorithm of the upper computer, and cooperates with the hardware logic control of the FPGA controller to realize the dynamic control of the spatial resolution of the haptic focus and the generation of multiple foci.

The application provides a thermal imaging lens temperature focusing compensation method and system based on mathematical modeling, comprising: obtaining multiple focusing curves of the same type of basic thermal imaging lens at different temperatures; respectively establishing a first mathematical model of a wide-angle end linear segment changing with temperature, a second mathematical model of a telephoto end linear segment changing with temperature, and a third mathematical model of a nonlinear inflection point segment changing with temperature; combining the first mathematical model, the second mathematical model and the third mathematical model to form a general mathematical model for describing the focusing curve at any temperature; obtaining partial focusing curve data of a target lens at at least one reference temperature, fitting individual difference parameters of the target lens by using the general mathematical model, so as to determine the complete focusing curve of the target lens in the full temperature range; and outputting the corresponding focusing motor driving position according to the complete focusing curve. The application can solve the problem of long time consumption of individual calibration of each lens in the full temperature range in the prior art.

The present disclosure relates to a lens that can be used for a hologram, an augmented / virtual reality display, and the like, and more particularly, to a meta-lens using a meta surface.

A three-dimensional topography detection method is provided. A modulation light projection module is prepared to project a periodic light and shadow pattern with a pattern change period length along a modulation direction through a grating mask. The pattern change period length along the modulation direction includes multiple modulation phases. The distance between any two adjacent modulation phases is a step modulation phase difference distance. The periodic light and shadow pattern is projected to a to-be-detected object. A phase modulation relative displacement between an image-taking lens assembly and the to-be-detected object is adjusted. The image-taking lens assembly and the to-be-detected object perform a focusing relative displacement between multiple focusing positions. An image capturing device is used to capture images. Multiple detection images are captured. The relative height is analyzed through the detection images to establish a three-dimensional topography.

This application discloses a laser cutting system for cutting semiconductor material ingots, relating to the field of laser cutting technology. The laser cutting system includes a support platform for supporting the semiconductor material ingot. A beam splitter is positioned along the output path of a laser emitting device, receiving the laser beam emitted by the laser device and splitting it into multiple sub-laser beams spaced apart along a first horizontal direction. A focusing device includes multiple focusing modules arranged corresponding to each sub-laser beam. Each focusing module focuses the received sub-laser beam onto the layer to be cut on the semiconductor material ingot, allowing multiple sub-laser beams to simultaneously act on the layer and form a modified layer. Each focusing module includes a height gauge, and the layer to be cut is spaced a preset distance from the top surface of the semiconductor material ingot. The laser cutting system of this application can improve processing efficiency, ensure focus stability, and achieve adaptive adjustment of laser energy.

The application discloses a kind of MTF template matching measurement methods suitable for multiple focusing lenses, specifically: industrial camera moves to focal plane, and shoots a focal plane image for subsequent template matching scale adjustment;Find the best zoom ratio using hill climbing algorithm, adjust the template size according to the ratio;After adjusting the template size, match the measurement area according to the template;Semantic segmentation detects stripe, after determining the horizontal and vertical stripe area, calculate the contrast of each area;Sort the contrast data according to the area, thereby corresponding to different stripe area number, mark the outer ring and inner ring measurement results and stripe number on the image, and finally draw two MTF curves of horizontal stripe and vertical stripe according to the measurement data.The application can improve the efficiency and accuracy of MTF measurement.

A method for laser processing of a workpiece that has a transparent material includes dividing an input laser beam into a plurality of sub-beams by using a beam splitting element, focusing the sub-beams coupled out of the beam splitting element to form multiple focus elements, and applying the focus elements to the material of the workpiece for the laser processing. The focus elements are moved relative to the material in a feed direction. A first sub-quantity of the focus elements is arranged in a first plane. A second sub-quantity of the focus elements is arranged in at least one other plane. The first plane and the at least one other plane are spaced apart in the feed direction. The first plane and the at least one other plane are orientated perpendicular to the feed direction.

A method and apparatus for scanning pathological slides based on locally permissible scanning speed constraints includes: acquiring a low-magnification preview image of the current pathological slide; using each tissue region in the low-magnification preview image as a candidate scanning region and generating multiple focus points for each candidate scanning region; acquiring the nearest adjacent focus point with the Euclidean distance to each focus point and forming candidate adjacent point pairs; acquiring the adjacency marker of each candidate adjacent point pair; constructing an adjacency-constrained focal plane based on all candidate adjacent point pairs whose adjacency markers are permissible; and performing pathological slide scanning with a focusing head based on the adjacency-constrained focal plane. This scheme combines the dynamic focusing capability parameters of the focusing head, the planar spatial distance between candidate adjacent point pairs, and the difference in focusing height to calculate the adjacency marker, thereby embedding hardware focusing capability into the focal plane construction, identifying locally high-gradient non-executable connections, and ensuring the practical feasibility of continuous focusing.

The application provides a multi-focus laser head, comprising: a collimating mirror assembly, a multi-splitting assembly and a focusing protection assembly; the multi-splitting assembly is arranged between the collimating mirror assembly and the focusing protection assembly; the multi-splitting assembly comprises a first multi-splitting prism and a first splitting mirror seat, and the focusing protection assembly comprises a focusing optical lens and a focusing seat body; the first multi-splitting prism is fixedly arranged in the first splitting mirror seat; the collimating mirror assembly is configured to receive incident light emitted by a laser; the first multi-splitting prism is configured to split the incident light into multiple light beams; the focusing optical lens is fixedly arranged in the focusing seat body, and the focusing optical lens is configured to focus the multiple light beams transmitted by the first multi-splitting prism respectively to form multiple focal point states. The application can split the incident light into multiple light beams through the first multi-splitting prism, and the focusing optical lens can focus the multiple light beams to form multiple focal point states, so that multi-focus output is realized, and the processing efficiency of the laser is improved.

This utility model discloses an optical system and vehicle lamp that achieves functional multiplexing, belonging to the field of vehicle lighting technology. It includes a lens structure and a reflector. The lens structure includes an incident light section and an exiting light section. Light rays are incident on the exiting light section through the incident light section. The exiting light section includes at least a first structural surface and a second structural surface. The first structural surface has a first focal point F1, and the second structural surface has a second focal point F2, enabling collimation of the light rays emitted from the first focal point F1 via the first structural surface. The second structural surface is adapted to collimate the light rays emitted from the second focal point F2. The reflector is disposed in the light-emitting direction of the lens structure and includes several reflective unit surfaces. The reflective unit surfaces receive the light emitted from the lens structure and reflect it outwards. This utility model is an optical system that achieves functional multiplexing. Through the combination of a multi-focal lens structure and a reflector, it improves the uniformity of light while achieving functional multiplexing and ensuring that each type of light ray remains in focus.