187 results about "Multiple focus" patented technology

Indirect vision system VIS comprises mirrors and / or cameras and a mixed-function multi-focal multi-functional DS light signal device having the reflector 50 and its associated source hidden under an opaque cover Hi capable of developing an illuminating surface 3 with a line design or luminous perimeter figures, associate and combine within the light perimeter, under the Hi cover, in the H casing or in the structure, other devices and functional subassemblies. With aerodynamic profile associated with protecting and improving the perception of light signal.

The invention discloses a fiber bragg grating femtosecond laser direct writing system and method based on light field regulation and control. The system comprises a femtosecond laser source, a polarization control module, a light beam expanding module, a light field modulation module, a 4f filtering imaging module, an oil immersed objective lens, a precision positioning and optical fiber clamping module, an observation module and a computer control module. The method comprises the following steps: firstly, fixing a standard single-mode optical fiber to be processed on a three-dimensional precision displacement platform; then programmable wavefront modulation is carried out on the femtosecond laser through a light field modulation module, and a multi-focus array is generated; then focusing the multi-focus array into the fiber core through an oil-immersed objective lens to realize one-time parallel inscribing of a plurality of refractive index modulation RIM regions; and finally, the computer control module controls the three-dimensional precision displacement platform to move at a constant speed in the axial direction of the optical fiber, and parallel integrated inscribing of a plurality of FBG structures is completed. According to the invention, the inscribing precision and inscribing efficiency of fiber bragg grating femtosecond laser direct writing are improved.

The invention provides a double-light module and a vehicle lamp, and relates to the technical field of illumination. Comprising an ADB light source, a low-beam light source, an ADB lens, a low-beam lens and a multi-focus lens module, the multi-focus lens module comprises a first lens module and a second lens module, and a first focus of the first lens module is different from a second focus of the second lens module; emergent light rays of the ADB light source are connected into the ADB lens, and the emergent light rays of the ADB lens are emitted in an ADB light form after passing through the first lens module; the low-beam lens is connected with emergent light of the low-beam light source, and the emergent light of the low-beam lens is emitted in a low-beam light shape after passing through the second lens module. The multi-focus lens module is adopted to receive emergent light of the ADB lens and the low-beam lens, focuses of lens modules corresponding to the low-beam module and the ADB module are separated, the problems of light shape splicing, splicing dark lines, serious dispersion and the like caused by the fact that the low-beam module and the ADB module share the focus lens are solved, and the performance of the automobile lamp is improved.

A head-wearable extended reality (XR) device includes an optical assembly. The optical assembly has a display and an optical element. The display is provided to display virtual content to a user of the XR device. The optical element is provided to direct the virtual content from the display along an optical path to an eye of the user. The optical element includes a first portion and a second portion. The first portion provides a first focus distance that corresponds to a first viewing zone of the display. The second portion provides a second focus distance that differs from the first focus distance and corresponds to a second viewing zone of the display.

The invention discloses a focusing method, a microscopic system and a computer readable storage medium. The microscope system comprises an objective lens and an imaging assembly for imaging a target surface, and the focusing method comprises the steps that the microscope system is controlled to execute coarse focusing operation, so that a focusing position is located at a coarse focusing position, and the focusing position is a relative position between the objective lens and the target surface; the objective lens and / or the target surface are / is controlled to move multiple times at the position near the coarse focusing position, and after each time of movement, a new focusing position and a definition score of an image shot by the imaging assembly for the target surface corresponding to the new focusing position are obtained; a definition mapping curve is determined according to the multiple focusing positions and the multiple definition scores, then the objective lens and / or the target surface are / is moved so that the focusing positions can be located at the fine focusing positions, then the imaging assembly obtains a clear image of the target surface, and the definition scores at the fine focusing positions are determined according to the wave crests of the definition mapping curve. The focusing method is beneficial to improving the observation efficiency.

The invention discloses a multi-focus translation staggered close connection type parallel laser direct writing rapid processing method which comprises the steps that a multi-focus module and a laser direct writing scanning device are built, the multi-focus module generates multi-beam arrays which are arranged in parallel, and after the multi-beam arrays are focused by the laser direct writing scanning device, multi-focus laser arrays which are arranged in parallel at equal intervals are formed at a focal plane; a multi-focus translation staggered scanning strategy is designed, and in the scanning strategy, direct-writing machining areas of all focuses are interspersed and staggered, so that a close-connection direct-writing machining area is formed; the multi-focus laser arrays arranged in parallel at equal intervals perform scanning through a scanning strategy, in the scanning process, each focus is controlled through an independent laser switch of the focus, the multi-focus laser arrays interact with a photoetching material, and rapid laser direct writing of any pattern to be processed is achieved in a close connection direct writing processing area. According to the invention, one-mirror-to-bottom type seamless laser direct-writing scanning can be realized, and the multi-focus laser direct-writing processing efficiency and quality can be effectively improved.

This application is directed to media content compensation at an electronic device having a head-mounted display. The electronic device determines a multifocal eyewear prescription of a user associated with the electronic device. The multifocal eyewear prescription includes a multifocal parameter for a lens having a plurality of focal lengths. The electronic device obtains input media content, converts the input media content to corrective media content based on the multifocal eyewear prescription of the user, and renders, on the HMD, the corrective media content. In some embodiments, the lens includes a plurality of segments corresponding to the plurality of focal lengths. Each image frame of the input media content is divided into a plurality of regions based on the plurality of segments. The electronic device compensates the plurality of regions of the input media content based on the plurality of focal lengths to generate the corrective media content.

The invention relates to the technical field of photoelectric precision instruments, and particularly discloses medical beauty femtosecond laser equipment and a processing method thereof. The device integrates a femtosecond laser, an automatic optical attenuator, an SLM spatial light modulator, a lens system, a CCD camera, an image processing unit and a control unit, and realizes high-precision and personalized improvement of a target object. According to the device, a laser beam is generated through a femtosecond laser, energy is adjusted through an automatic optical attenuator, the phase is modulated through an SLM spatial light modulator to form a multi-focus pattern array, and finally the multi-focus pattern array is tightly focused to a target object through a lens system. The CCD camera shoots an image of a target object, the image processing unit acquires depth information, and the control unit adjusts laser beam parameters according to the information, so that personalized improvement is realized. The machining method comprises the steps of laser beam generation, attenuation, phase modulation, focusing, image shooting and processing, parameter adjustment and the like, and the improved accuracy and safety are ensured.

The invention belongs to the technical field of micro-nano optics. The invention provides a multi-focus off-axis super lens of a visible light wave band. The multi-focus off-axis super lens comprises a plurality of groups of off-axis single-focus sub super lens assemblies which are circularly arranged, wherein each group of off-axis single-focus sub super lens assemblies comprises a plurality of off-axis single-focus sub super lenses which are concentrically and annularly distributed; wherein the off-axis single-focus sub-super-lens comprises a micro-structure unit and a substrate unit, the micro-structure unit comprises a plurality of micro-structure columns which are uniformly arranged, and one end of each micro-structure column is arranged on the substrate unit. According to the embodiment of the invention, on the basis of a geometric phase modulation principle, through reasonable phase design and microstructure arrangement, the off-axis single-focus sub-super-lens has a designed focus position; through spatial multiplexing of the micro-structures of the multiple off-axis single-focus sub-super-lenses, one super-lens has the phase characteristics of the multiple off-axis single-focus sub-super-lenses, and the functions of the multiple off-axis single-focus sub-super-lenses are achieved on one super-lens.

The invention discloses a multi-wavelength same-viewing-direction laser radar telescope system, and belongs to the technical field of laser radar detection. The system comprises a paraboloid single primary mirror which focuses a specific wavelength optical signal received by a telescope to a focus through a primary mirror paraboloid; the replaceable small hole is fixedly formed in the focus position of the paraboloid single primary mirror; the collimating lens group is used for collimating the telescope focusing light beam penetrating through the replaceable small hole to form parallel light beams; the n dichroic mirror groups are used for dividing the parallel light beams into reflected parallel light beams and transmitted parallel light beams; and the plurality of focusing lens group assemblies are used for focusing the parallel light beams split by the dichroic mirror to the focal points of the focusing lens group assemblies, and the number of the plurality of focusing lens group assemblies is n + 1. Multi-wavelength receiving in the same direction can be achieved, light background noise is suppressed by the secondary diaphragm, view fields of different wavelengths are controlled respectively, the size is small, the light collecting efficiency is high, and noise is low.

The invention provides a multi-focus pulse light beam parallel processing method and system based on space beam splitting, and relates to the technical field of semiconductor material laser processing, and the method comprises the steps that a laser generator emits pulse laser to a SiC crystal ingot; the light path adjusting unit performs beam splitting and modulation on the pulse laser to obtain multiple beams of sub-pulse laser; the spatial light modulator performs spherical aberration compensation on the multiple beams of sub-pulse laser, performs phase modulation on the sub-pulse laser by adopting a hologram method to generate various target light fields, and modulates the target light fields in real time by switching holograms to obtain multi-focus pulse laser; the laser processing head unit is used for focusing multi-focus pulse laser in the SiC crystal ingot to set the depth; and the motion base station controls the SiC crystal ingot and the multi-focus pulse laser to perform relative motion and adjusts the relative position between the SiC crystal ingot and the laser processing head unit, scanning processing of the SiC crystal ingot is completed on a preset depth and a preset advancing route, and finally a processed wafer is obtained.

The invention relates to the technical field of radiation imaging, in particular to a coded hole XRD (X-Ray Diffraction) imaging system and method based on a distributed ray source, and the system comprises the distributed ray source which is provided with a plurality of focuses and is used for transmitting multiple beams of multi-energy X-rays; the front collimator is used for shaping each multi-energy X-ray beam into a fan-beam multi-energy X-ray beam and ensuring that the fan-beam multi-energy X-ray beam completely covers an area to be reconstructed of a scanned object so as to generate a diffraction signal; the transmission detector is used for performing attenuation correction on the diffraction signal; the coding plate is used for coding diffraction signals generated by the object; the pixelated spectrometer is used for measuring the coded diffraction signals so as to form diffraction data; and the image reconstruction module is used for carrying out iterative optimization on the target function by utilizing the diffraction data to obtain a reconstructed image. Therefore, the problems that an existing snapshot type coding hole imaging system is poor in data condition and difficult to solve, and an existing rotary scanning coding hole imaging system is high in complexity, long in scanning time and the like are solved.

A head-wearable extended reality (XR) device includes an optical assembly. The optical assembly has a display and an optical element. The display is provided to display virtual content to a user of the XR device. The optical element is provided to direct the virtual content from the display along an optical path to an eye of the user. The optical element includes a first portion and a second portion. The first portion provides a first focus distance that corresponds to a first viewing zone of the display. The second portion provides a second focus distance that differs from the first focus distance and corresponds to a second viewing zone of the display.

The invention discloses a laser processing method and a glass product. The laser processing method comprises the steps that a glass plate is subjected to laser modification along a preset contour track, a preset chamfer contour formed by multi-focus distribution is formed in the glass plate through laser, and the preset chamfer contour transversely penetrates through the glass plate; a carbon dioxide laser is adopted to perform laser expansion cracking on the glass plate along a preset contour track; wherein the coincidence tolerance of the laser expanding and cracking track and the laser modification track is not greater than 0.5 mm. Through the mode, the laser processing method provided by the invention can greatly improve the overall production efficiency of the glass product.

A magnetic field measurement method based on multi-focus array laser pumping atomic spinning comprises the steps that pumping light is subjected to phase modulation through a spatial light modulator to generate a multi-focus circularly polarized light array, light intensity distribution of focuses of the multi-focus circularly polarized light array on a transverse plane is uniform, and the distances between the focuses of the multi-focus circularly polarized light array are consistent; therefore, the problem of non-uniform distribution of the laser in the transverse direction due to Gaussian light intensity is effectively compensated. In the longitudinal direction, according to the law of energy attenuation caused by the action of light and atoms, the focus light intensity is designed to be gradually enhanced along with the z-axis depth in combination with an anti-Lambert-W function, and a focus array is uniformly focused at the center of an alkali metal gas chamber by expanding the focus depth, so that the transverse and longitudinal polarizability uniformity of alkali metal atoms is remarkably improved, the optical frequency shift virtual magnetic field gradient is inhibited, and the stability of the alkali metal gas chamber is improved. And the common-mode rejection ratio, the signal-to-noise ratio and the response sensitivity of the SERF magnetic field measuring device are improved. The focus array is optimized in real time through detection feedback, efficient compensation and regulation are achieved, and the method is suitable for accurate measurement of the sub-fT-level weak magnetic field.

The utility model relates to an ultrafast laser processing pole piece device, which is characterized in that an ultrafast laser, a light box, a reflecting mirror I, a one-dimensional motion unit and an X-axis motion unit are arranged on a rack, a multi-focus diffraction optical element is arranged on the one-dimensional motion unit, a bottom plate is connected onto the X-axis motion unit, a reflecting mirror II and a Z-axis motion module are arranged on the bottom plate, and the Z-axis motion module is connected onto the X-axis motion unit. A third reflecting mirror and a galvanometer and field lens unit are installed on the Z-axis movement module, a light box, a first reflecting mirror, a multi-focus diffraction optical element, a second reflecting mirror, the third reflecting mirror and the galvanometer and field lens unit are sequentially arranged on an output light path of the ultrafast laser, and a Y-axis movement unit is arranged below the galvanometer and field lens unit. And an adsorption platform for adsorbing and loading the pole piece is arranged on the Y-axis movement unit. A pole piece is drilled or cut, a transmission light path obtains multiple focuses through a one-dimensional beam splitting diffraction optical element, and the hole is drilled in the pole piece to improve the inlet and outlet speed of lithium ions; when the pole piece is cut, the one-dimensional beam splitting diffraction optical element is switched to the outside of the transmission light path, and the light beam behind the field lens is a single focus.

The invention discloses a dew-point meter measurement data processing method and equipment, relates to the technical field of industrial automatic measurement and control and fault diagnosis, and aims to construct a dynamic sensing window with a variable form to preprocess dew-point meter time sequence data, calculate fault probability entropy in real time and detect instantaneous abnormality. And a window form is decided in combination with the fault-window form mapping library, and adaptive switching is carried out to obtain an anomaly recognition result. And selecting a corresponding algorithm from the correction strategy library to correct the abnormity. According to the method, a dynamic sensing window with a variable form is constructed, and adaptive switching among panoramic, sniping and multi-focus forms is realized by taking the fault probability entropy calculated in real time as a drive. By means of a built-in fault-window form mapping library, abnormal symptoms and fault physical mechanisms are associated, multiple concurrent faults are separated, root causes are deduced, and decision space explosion is avoided. And on the basis of a diagnosis result, a correction strategy library targeted algorithm is called to correct abnormity, and an identification-diagnosis-correction intelligent closed loop is formed.

The invention relates to the technical field of laser ultrasound, and particularly discloses a multi-dominant-frequency laser ultrasonic holographic system and a design method.The system comprises a laser and a laser beam adjusting module used for receiving and adjusting laser beams, the laser beam adjusting module comprises a beam expanding lens and a collimating lens which are coaxially arranged, the beam expanding lens is used for adjusting the diameter of the laser beams, and the collimating lens is used for adjusting the diameter of the laser beams; the collimating mirror is used for collimating the laser beams so that the laser beams are kept parallel and focused; the frequency mixing ultrasonic holographic lens comprises a light focusing layer, a sound restraint layer, a light absorption layer, a sound matching layer and a sound holographic layer which are stacked in sequence, and the frequency mixing ultrasonic holographic lens is used for receiving the laser beams passing through the laser beam adjusting module so as to generate multiple stable single or multiple focusing ultrasonic sound fields with different preset frequencies in a time-sharing or simultaneous manner; and the focusing focus position and power can be adjusted, so that the device can be used for ultrasonic control and driving, ultrasonic detection imaging, low-power ultrasonic stimulation or power ultrasonic treatment and the like.

The invention relates to the technical field of myopia prevention and control lens manufacturing, and discloses a multi-focus out-of-focus myopia prevention and control lens based on a micro-lens array, the multi-focus out-of-focus myopia prevention and control lens comprises a peripheral area and a central area, the central area is used for correcting refraction, and the central area is located in the middle of the peripheral area. The peripheral area uses a Zernike polynomial to construct a dynamic defocusing model, the defocusing amount can be dynamically adjusted, the dynamic defocusing model obtains eyeball movement information through a feedback system, the frequency of real-time adjustment of the defocusing amount along with eyeball movement is larger than or equal to 10 Hz, and the defocusing amount of the peripheral area is changed in a gradient mode from + 2.00 D to + 4.00 D. A dynamic defocusing model is constructed by using a Zernike polynomial, and the model obtains eyeball movement information through a feedback system, so that the problem that the prevention and control effect is reduced due to the fact that the defocusing amount of the peripheral area of a traditional multi-focus defocusing myopia prevention and control lens is mostly fixed and the focus cannot be overlapped with the retina in real time when the eyeball moves is solved.

The application provides a laser processing brittle material multi-focus cracking device, which comprises a laser, a beam expanding and collimating system, a diffraction element and a beam focusing system; the laser is used for emitting laser; the beam expanding and collimating system is arranged on a light path of laser transmission, and is used for expanding the laser emitted by the laser; the diffraction element is used for making the laser generate multiple diffraction orders; and the beam focusing system is used for focusing the laser, so that the laser forms multiple focuses in the longitudinal position of the brittle material. The application controls the focusing sequence of the focuses in the material by introducing a specific diffraction optical element and adding a high-frequency oscillation filter on the focusing light path, and multiple modified layers are formed in the longitudinal position of the material through one-time scanning of the laser, so that the cold cracking efficiency is greatly improved.

The invention discloses a multi-focus laser micro-nano manufacturing method and system, and relates to the technical field of laser processing, and the method comprises the steps: analyzing SVG vector coding information of a processing pattern; an LCOS-SLM multi-focus array is obtained by adopting an annular segmentation algorithm; adjusting the size of the graph, carrying out discretization processing on the graph, and carrying out interval homogenization processing on coordinate points of the graph; dividing the uniformly dispersed graph into n processing areas, and grouping coordinate information by taking uniform distribution of focus positions as a principle to obtain a processing path; substituting the coordinate information of each partition into an annular segmentation algorithm to generate a holographic phase image set; and splicing parameters between the machining areas are calibrated, and multi-focus parallel machining is completed. The efficient laser parallel machining method is achieved, the efficiency and stability of a laser machining system and the machining uniformity of a curve structure can be improved, and an efficient and reliable solution is provided for the field of micro-nano machining.

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 invention belongs to the technical field of light guide plate machining, and discloses a multi-focus rotary machining method and device for a large-size light guide plate, and the device comprises a machining cavity, and a laser, a high-speed optical switch, a spatial light modulator and a first reflector are installed above the machining cavity; the rotary table is rotationally installed in the machining cavity, a second reflecting mirror is rotationally installed at the center position of the rotary table, and a plurality of third reflecting mirrors which are arranged in the circumferential direction are further installed on the rotary table; a light guide plate to be processed is placed on the conveyor belt, and the conveyor belt is used for conveying the light guide plate to a processing position; and when the light guide plate is transmitted to a preset processing position and any third reflector rotates into a preset area above the light guide plate, a laser is started to process the light guide plate. By introducing the spatial light modulator, original single-focus laser processing is upgraded to multi-focus parallel processing, and the processing efficiency of the light guide plate lattice points is greatly improved.

The present application discloses a servo system and method, relating to the technical field of optical storage. This servo system solves the servo addressing problem when multi-focus parallel data reading is performed based on an array of light beams. The system includes an optical head assembly and a signal processing device. The optical head assembly is configured to generate a first set of optical signals including multiple optical signals, and to apply the first set of optical signals to multiple data points on an optical storage medium to obtain a second set of optical signals, which includes reference signals of at least three reference data points and data signals of data points to be read. The signal processing device is configured to receive the second set of optical signals, and obtain a servo control signal for adjusting the position of the optical head assembly according to the reference signals in the second set of optical signals and preset information of at least three reference points.

An intelligent multifocal lens includes an optical zone. The optical zone includes a near vision zone, a transition vision zone, and a far vision zone surrounding the near vision zone and the transition vision zone. An add power of the near vision zone has a negative correlation with a radius of the near vision zone. A reduction of the power of the transition zone is in a range of 0.1 D to 0.6 D. The near vision zone and the transition vision zone have an interface therebetween, and a power of the near vision zone and a power of the transition vision zone at the interface therebetween are the same. The transition vision zone and the far vision zone have an interface therebetween, and a power of the transition vision zone and a power of the far vision zone at the interface therebetween are the same.

The present invention discloses a task scheduling method for a low-earth orbit large-scale remote sensing constellation for continuous observation applications of multiple ground targets of interest, including: S1. Construction of a task allocation model: Establish a task allocation model for continuous observation of multiple ground targets of interest by a low-earth orbit large-scale remote sensing satellite constellation. The task allocation model describes the allocation process of observation tasks, stipulates the conditions and objective function satisfied by the optimal observation plan, comprehensively considers the maximum observation gap window constraint and various strong constraints, and maximizes the overall task benefit value of the optimal observation plan; S2. Solving the task allocation model: Use a solving algorithm formed by adding a constraint check and correction operator to the genetic algorithm to solve the task allocation model and obtain the optimal observation plan. The advantages are: Aiming at the characteristics of continuous observation task requirements, using the maximum observation gap as an index to measure the continuity of observation tasks, having the advantage of taking into account both observation time and observation continuity, and improving the accuracy and efficiency of task solving.

The present invention discloses a reflection-type non-metallic material defect detection and component analysis device and method. The device includes a linearly frequency modulated source module, a solid-state switch matrix, a low-noise amplifier module group, a terahertz signal transceiver device, an intermediate-frequency signal acquisition module, and a host computer that are connected in sequence. The terahertz signal transceiver device includes a first split-type terahertz signal transceiver integrated link group, a second split-type terahertz signal transceiver integrated link group, a first pair of terahertz antennas, a first transparent non-polarizing beam splitter, a first multi-focus parabolic mirror, a second pair of terahertz antennas, a second transparent non-polarizing beam splitter, a second multi-focus parabolic mirror, as well as a beam splitter, a third multi-focus parabolic mirror, and a four-dimensional scanning frame. The device and method disclosed by the present invention can achieve three-dimensional tomography imaging with a micron-level resolution and component analysis with a hertz-level resolution for a sample to be measured, and at the same time have advantages such as a large dynamic range and good environmental adaptability.

The utility model belongs to the technical field of car lamps, and particularly relates to an optical coupling structure and a car lamp, the optical coupling structure comprises a plurality of light sources and a reflecting mirror, the inner surface of the reflecting mirror comprises a plurality of coupling reflecting surfaces, the coupling reflecting surfaces are arranged in parallel, the generatrix of each coupling reflecting surface is an ellipse, and the ellipse is provided with a first focus and a second focus. Each first focus is provided with a light source, and the multiple second focuses are arranged in an overlapped mode. According to the utility model, the generatrix of each coupling reflection surface is the ellipse, the light source is arranged on the first focus by utilizing the characteristics of the ellipse, the second focuses of the plurality of generatrixes are overlapped, and the light emitted by each light source from the first focus is totally reflected by the coupling reflection surfaces and then is converged on the second focus, so that the light of the plurality of focuses is coupled into one focus; therefore, the defocusing problem is avoided, the light efficiency is reasonably and efficiently utilized, and the lighting is uniform and attractive.

Embodiments of the present application provide a kind of multi-focus laser assembly, laser processing device and method.Multi-focus laser assembly includes laser, beam splitting element, beam angle adjustment assembly, first beam shaping assembly, beam converging assembly and objective lens arranged in order along the direction of light path, laser is used to emit laser beam;Beam splitting element is used to split laser beam into predetermined number of sub-beams;Beam angle adjustment assembly includes predetermined number of sub-adjustment unit, each sub-adjustment unit is used to adjust the transmission angle of corresponding sub-beam;First beam shaping assembly includes predetermined number of sub-beam shaping element, each sub-beam shaping element is used to shape the sub-beam adjusted by corresponding sub-adjustment unit;Beam converging assembly is used to converge all sub-beams with preset optical parameters on objective lens, so that all sub-beams form burst point at predetermined number of positions of object after focusing through objective lens.This scheme has relatively high cutting efficiency.

The invention discloses a multi-focus composite Fresnel phase diagram rapid generation and power equalization method and system for one-to-many free space laser communication. According to the method, aiming at a scene in which a plurality of user targets are located at different directional angles and different propagation distances, a focusing + directional single-beam phase is constructed for each target on the basis of analyzing a Fresnel zone lens phase and a linear tilt phase, and the phase is taken after complex field superposition is performed according to a preset power weight, so that the target target is obtained. A composite phase diagram for a phase-type spatial light modulator (SLM) is directly obtained. The power weight is preset according to a link budget or a task demand so as to realize on-demand distribution and equalization of multi-beam output power; and meanwhile, fixed phase bias can be introduced to each beam to suppress inter-beam interference fringes. According to the method, frame-by-frame iterative solution is not needed, the calculation complexity is low, and high-frame-rate and low-delay online updating is easy to realize.