292 results about "Focal surface" patented technology

The invention discloses a high-power microscope intelligent scanning method for a bone marrow smear, which comprises the following steps: S1, automatically dividing a scanning area: acquiring a bone marrow smear image by adopting a front camera, and selecting an optimal scanning area through a multi-dimensional quality evaluation model; s2, intelligent partitioning and focusing point distribution: dividing an optimal scanning area into N * M sub-areas, determining P focusing sampling points by adopting a layered sampling strategy, and establishing a three-dimensional coordinate mapping table; s3, multi-point focusing data acquisition: according to a preset coordinate mapping table, driving an objective table and an objective lens assembly to move to each sampling point in sequence, and constructing an N * M * P-dimensional focusing data matrix; s4, performing focal plane fitting by a least square method: performing three-dimensional plane fitting on the acquired data; and S5, intelligent scanning imaging: calculating the theoretical optimal focal length of each position in the scanning path according to the fitting function, and driving the objective lens assembly to adjust the focal length in real time for scanning imaging. According to the invention, the scanning area identification accuracy and the image definition uniformity are automatically improved in the whole process.

The invention discloses an optical imaging and coding hole technology fused optical imaging system and method, and aims to integrate scattered polarization components in a reflected light signal into coding light field data with clear layers by constructing a polarization coding modulation system, so as to highlight a coupling relationship among optical elements. A refocusing sequence and a focal plane chromatography technology are adopted, spatial geometric information and light intensity distribution characteristics of different depth layers are fully excavated, and a three-dimensional distribution rule of surface topography is disclosed; wavefront correction and deformable mirror control technologies are introduced, imaging parameters of an optical system are adjusted in a self-adaptive mode, and the application range of measurement precision is expanded; light intensity modulation analysis and phase unwrapping window processing are combined, the change trend of the surface curvature is depicted, and key feature points of morphology measurement are grasped; finally, multi-dimensional and multi-level optical measurement information is fused, three-dimensional measurement output with rich content and reliable precision is formed, and comprehensive and high-quality measurement technology resources can be provided for application scenes such as precision optical detection and surface quality evaluation.

The invention relates to the technical field of laser shaping, in particular to a light spot shaping method and system based on a spatial light modulator, and the method comprises the steps: providing and expanding an incident laser beam in Gaussian distribution, and obtaining a collimated and expanded beam; irradiating an incident laser beam to a spatial light modulator, loading a preset phase modulation pattern to modulate a wavefront phase, and outputting a phase modulation beam; the phase modulation light beam is input into a 4f imaging system, a spatial light modulator is located on the front focal plane of a first lens, and the light beam forms a light field with target intensity distribution on the rear focal plane of a second lens after passing through the system; and the light field is focused on the surface of a workpiece to be processed through an objective lens to form a flat-topped light spot. According to the scheme, uniform light intensity distribution can be flexibly generated without replacing optical elements, the uniformity and utilization efficiency of laser energy in a machining area are remarkably improved, and the problem of material damage or insufficient edge machining caused by too strong center energy is effectively solved.

The invention relates to an overlay measurement system and a measurement method, and belongs to the technical field of chip manufacturing. Interference scanning focus measurement and independent focusing imaging of double industrial cameras are combined, an overlay measurement system accurately positions focal planes of different photoetching layers on a wafer by using interference signals through one-time vertical scanning, and then the two cameras are driven to be synchronized to image plane positions of the respective focal planes, so that the alignment precision of the wafer is improved. Therefore, one-time and synchronous high-definition imaging and overlay error calculation of two layers of patterns exceeding the optical focal depth are realized, and the measurement efficiency is remarkably improved.

The invention relates to the technical field of optical imaging, and discloses a novel reflective dark field imaging method and system based on Fourier conjugate plane modulation, and the method comprises the steps: controlling a first spatial light modulator to load a dynamic annular illumination pattern, and projecting the dynamic annular illumination pattern to a rear focal plane of an objective lens; light field distribution formed by scattering signal light and annular reflected light is separated on a rear focal plane by using an objective lens; relaying the light field distribution to a conjugate plane where a second spatial light modulator is located through a second relay light path; and controlling the second spatial light modulator to load a dynamic blocking pattern, blocking the annular reflected light and enabling the scattered signal light to pass through, and finally imaging. According to the invention, two electronically synchronous spatial light modulators are adopted to construct a dynamic illumination light field and realize adaptive spatial filtering respectively, so that cooperative matching of an illumination pattern and a blocking pattern is realized, active compensation of optical chromatic aberration is facilitated, the problem of background leakage under wide-spectrum illumination is solved, and the illumination quality is improved. And a high-numerical aperture objective lens lacking a dark field channel is compatible.

The invention provides a virtual reality display method and system, a computer and a storage medium. The method comprises the following steps: collecting sight movement data and head movement data of a user; predicting a fixation point area at the next moment based on the historical movement track of the fixation point area; according to the scene depth information, the sight line moving speed and the head motion data of the fixation point area at the next moment, predicting the predicted focal plane depth at the next moment, and dynamically adjusting the configuration of the micro-lens array in the optical assembly to match the predicted focal plane depth. The depth of a focal plane is predicted through fusion data of eye movement tracking and an inertial measurement unit, the configuration of a micro-lens array is dynamically adjusted, meanwhile, a display picture is divided into a fixation point area, a fuzzy display area and an atmosphere rendering area, and based on differentiation rendering processing, the convergence adjustment conflicts of vision are remarkably relieved, the graphic calculation load is reduced, and the display quality is improved. And a self-adaptive high-definition display effect is realized.

The invention relates to an automatic focusing method and device and computer equipment. The method is applied to a microscope, and comprises the following steps: in response to an automatic focusing instruction, controlling an objective lens to move according to a first stepping value corresponding to an imaging parameter of the microscope, and acquiring at least two first reference images at different positions of the objective lens; determining a first objective lens position according to an objective lens position and ambiguity features corresponding to the first reference image; controlling the objective lens to move according to the first objective lens position and a preset second stepping value, and acquiring at least two second reference images at different objective lens positions; and according to the objective lens position and the definition characteristic corresponding to the second reference image, determining a target focal plane position and completing focusing. By adopting the method, the focusing efficiency can be improved and the calculated amount can be reduced on the premise of ensuring the focusing accuracy.

The utility model discloses a laser processing system for rapidly preparing a large-area zero-taper microstructure, and belongs to the technical field of laser processing optical design. The laser processing system comprises a laser device, a beam expanding and collimating system, a shaping system, a translation transformation system and a focusing system which are sequentially arranged on a main shaft of a system light path, the translation transformation system comprises a first lens and a second lens, the focal length of the first lens is f1, the focal length of the second lens is f2, the distance between the first lens and the second lens is f1 + f2, and the focal length of the first lens is f1; the shaping system is located between the rear focal plane of the first lens and the first lens; the focusing system comprises a galvanometer and a field lens arranged at the emergent end of the galvanometer, and the field lens is located between the front focal plane of the second lens and the second lens. Microstructure machining is carried out through the laser machining system, the problem that the machining amplitude of a traditional rotary cutting laser machining system is too small is effectively solved, the machining efficiency is greatly improved, the taper problem existing in laser machining is solved, and the machining quality is better guaranteed.

The invention provides a large-aperture optical system focal plane position measuring device and a measuring method, and solves the problems that a traditional method based on small detector scanning is difficult to fully cover and accurately butt joint a focal plane of a large-aperture optical system, so that local focusing is accurate but the whole is deviated; and the imaging performance of the large-aperture optical system is influenced. According to the invention, two functions of wave aberration detection and focal plane position measurement are integrated, one set of platform covers detection of two types of key optical parameters through switchable test path and detector configuration, the equipment utilization rate is improved, and the experiment cost is reduced. The six-degree-of-freedom adjusting table and the two-dimensional rotary table are used in cooperation, high-precision fine adjustment of the detected optical system in the space attitude and the position of the detector is achieved, searching and positioning of the focal plane can be rapidly completed, and the focusing efficiency is high.

The utility model discloses an off-axis bifocal plane HUD optical system, which comprises an image source, an eye box, a lens, a first reflecting mirror, a second reflecting mirror and an automobile windshield, the image source comprises a first output part and a second output part, light of the first output part passes through the first reflecting mirror, the second reflecting mirror and the automobile windshield to enable the eye box to obtain a near focal plane, and light of the second output part passes through the first reflecting mirror, the second reflecting mirror and the automobile windshield. The light of the second output part passes through the lens, the first reflecting mirror, the second reflecting mirror and the automobile windshield to enable the eye box to obtain a far focal plane. The image source is divided into two parts, the lens is arranged on the light path of the second output part of the image source, and a near-focus virtual image and a far-focus virtual image are formed in front of the windshield, so that a driver can see the virtual image surface and timely obtain the driving information of the vehicle under the condition of poor visual field such as vehicle following or traffic jam, and the driving safety of the vehicle is improved. Therefore, the thickness of the crystalline lens can be adjusted when human eyes watch far and near focuses, and fatigue caused by long-time observation of a certain focal plane is avoided.

The invention provides a head-up display system and a vehicle, and belongs to the technical field of optics. The head-up display system comprises an image source, a first plane lens, a second plane lens and a free-form mirror. The image source includes a first display area and a second display area. The first plane lens is located on an emergent light path of the first display area, and the second plane lens is located on an emergent light path of the second display area. The optical path of light emitted by the first display area on the first plane lens is different from the optical path of light emitted by the second display area on the second plane lens. The free-form mirror is located on transmission light paths of the first plane lens and the second plane lens. Because the optical path of the light in the first plane lens is different from the optical path of the light in the second plane lens, the equivalent object distances of the first display area and the second display area are different, and the virtual image distances of two focal planes corresponding to the first display area and the second display area are different. Therefore, the head-up display system can generate two focal planes with different virtual image distances.

The invention provides an automatic focusing device, an automatic focusing method and wafer quantity detection equipment, and belongs to the field of semiconductor optics, and the device comprises a light source, an illumination dimming mirror group, a beam splitting element, a reflector, an objective lens, a distance measurement dimming mirror group, a focal plane measurement unit, a dispersion compensation mirror group and a focusing compensation mirror group; the focal plane measuring unit can measure the focal planes of a plurality of process layers of the wafer and determine the focal length from the target focal plane to the objective lens, thereby realizing automatic focusing. According to the scheme, the dispersion compensation and objective lens measurement combined design is adopted, high precision and a large measurement range are achieved through dispersion curve control, specific quantity detection scanning can be conducted on a specific process layer of a wafer through the focusing compensation lens set, and the measurement precision is improved. And the method is convenient to popularize and apply in equivalent detection scenes of wafer nanoscale key dimensions, defects, overlay alignment and the like and in the photoetching processing field.

The invention discloses an off-axis alignment device, an off-axis alignment method and photoetching equipment. The device comprises a light source module used for providing a first light source signal for a silicon wafer, the silicon wafer is provided with a coarse alignment mark and a fine alignment mark, and the coarse alignment mark and the fine alignment mark feed back a first reflection light signal and a second reflection light signal respectively based on the first light source signal; the automatic focusing module is used for forming a first focusing mark on the surface of the silicon wafer and acquiring a third reflected light signal fed back based on the first focusing mark, and the third reflected light signal is used for performing focal plane compensation on the silicon wafer; the first detection module is used for acquiring first deviation information based on the first reflected light signal so as to perform first compensation on the position of the silicon wafer; and the second detection module is used for obtaining second deviation information based on the second reflected light signal after the first compensation so as to carry out second compensation. According to the scheme, the defocusing condition of the silicon wafer can be judged and compensated in real time, and the alignment efficiency and the overlay precision are improved.

The invention discloses a micro-lens array focal length detection method and detection equipment based on an image moving fitting method, and the method comprises the steps: setting a camera, adjusting the camera until the camera is focused on a micro-lens array, adjusting the optical axis distance between the camera and the array in a floating manner, and collecting star point light spot images and Perot plate line-to-plate images at a plurality of adjusted positions; according to the light spot sub-images corresponding to the same sub-lens in the plurality of light spot images, focal plane coordinates are determined, and corresponding PSF reconstruction is carried out; selecting a pair of light plate images and line-to-plate images, and performing recovery processing on sub-images corresponding to the sub-lenses in the images by using a Wiener filtering algorithm; performing convolution operation on the restored image and the reconstructed PSF function to obtain a reconstructed line-to-board image corresponding to the focal plane coordinates; and the focal length of the sub-lens is calculated according to the focal length of the collimator, the actual line distance of the Perot plate and the line distance determined by the reconstruction line to the plate image. Array images near the focus are collected in an image moving mode, and the focal lengths of the multiple sub-lenses are detected in parallel.

The invention relates to the technical field of carbon sequestration geological engineering, and particularly discloses a CO2 water rock reaction induced permeability change evaluation method based on machine learning, which comprises the following steps: firstly, acquiring multi-focal plane image data of a reacted sample on a scanning electron microscope platform; automatically identifying a reaction area by using the trained U-Net instance model, and obtaining porosity and specific surface area information; corresponding calculation coefficients are automatically selected and matched based on the area-depth information of the corrosion holes, normalization calculation is carried out, and the permeability and the spatial distribution of the permeability are directly output. According to the method, destructive detection is not needed, quantitative characterization of the rock permeability physical property is achieved, the analysis accuracy and efficiency are remarkably improved, batch processing statistics is supported, and reliable data support is provided for carbon sequestration safety research and sequestration simulation.

The application provides a differential-based white light lensless single-frame weakly conjugate reconstruction method, which can realize weakly conjugate image reduction and improve single-frame imaging resolution in a white light lensless imaging system without using additional elements and complex algorithms. The method comprises the following steps: step one, obtaining spectral distribution information of a system light source by using a spectrometer and performing differential processing to obtain a reconstruction wavelength; step two, performing preprocessing on a collected single-frame image by using a hologram average value reduction method; step three, generating light intensity diagrams of different defocusing surfaces by using an angular spectrum propagation formula, and determining a defocusing distance range based on a definition discrimination factor; and step four, calculating differential distribution on different focal planes in the distance range obtained in step three based on numerical differentiation, and obtaining a final result by selection. The application can reduce the requirement of spectral width of a traditional lensless microscope, effectively reduce the cost of the system, improve the imaging resolution of the white light lensless microscope, and reduce the weakly conjugate image in the case of single-frame image collection.

The invention relates to the technical field of reflective optics, in particular to an off-axis three-mirror optical system with double folding mirrors, which comprises a primary mirror adopting a concave reflecting mirror and a secondary mirror adopting a convex reflecting mirror, an intermediate image is formed on an output light path of the secondary mirror, and a first folding mirror is arranged at the position of the intermediate image; the first folding mirror folds the light beam from one side of the incident light beam of the primary mirror to the other side, so that the third mirror receives the light beam; the third mirror of the concave reflecting mirror is matched with the primary mirror and the secondary mirror to correct aberration, and a final imaging light beam is generated; a second folding mirror located on an output light path of the third mirror reflects the light beam again, so that the focal plane is close to and higher than the primary mirror; the focal plane is located in an envelope space of the primary mirror and the third mirror; the diaphragm is arranged in an off-axis mode, and the off-axis amount of the diaphragm is 0.3-0.6 times of the diameter of the aperture. According to the invention, the compactness of the off-axis three-mirror optical system is improved through double-folding front and back split arrangement; through focal plane position optimization, the optimized focal plane is higher than the primary mirror.

The invention discloses a large-view-field compound eye telescopic system suitable for daytime observation, and belongs to the technical field of optical system design. The system comprises a primary mirror, a compound eye optical unit, a refraction correction mirror group unit and a photoelectric detector unit which are sequentially arranged along an optical axis. The compound eye optical unit adopts a light splitting reflection cube-corner prism structure, and divides a focal plane of a primary lens into X paths of sub-view fields; the refraction correction lens group unit comprises n correction lens groups with built-in field diaphragms; a concentric annular light barrier group is arranged on the inner wall of the primary mirror chamber. Large-view-field observation is realized through optical splicing of a compound eye structure, strong background stray light in the daytime is remarkably inhibited by utilizing a built-in view field diaphragm and combining multiple scattering absorption of a light barrier group, and the stray light coefficient of the system is lower than 1.11 * 10 <-7 >. The technical problem that an existing optical telescope cannot carry out high-contrast large-view-field observation in the daytime is solved, and all-weather monitoring of near-earth celestial bodies is achieved.

This invention proposes a rapid verification method for the imaging performance of an aperture-coded infrared hyperspectral imaging system. This method uses an N×M filter array as the indoor imaging target. This array includes a central infrared window and multiple filters with different center wavelengths surrounding the infrared window, containing rich spectral feature information and geometric and spatial positional information of the filters. Utilizing a large-area blackbody and a collimator with a large focal plane, the system can capture all the necessary information from the filter array. After image reconstruction, using the data from the central window as a reference, the spectral transmittance curves of each filter can be calculated quickly and accurately, thereby verifying the system's ability to acquire spectral information. The system's ability to acquire geometric information can also be verified by observing the geometry and relative positions of the filters in each spectral channel. This invention provides an efficient, reliable, and rapid verification method for aperture-coded infrared hyperspectral imaging systems.

The invention relates to an ultra-large field-of-view dual-waveband aperture multiplexing type optical remote sensing camera, and belongs to the technical field of optical remote sensing. The optical remote sensing camera comprises a visible light optical system and an infrared optical system which share a primary mirror and a secondary mirror. The visible light optical system comprises a primary mirror, a secondary mirror, a visible light third mirror, a reflex mirror and a visible light focal plane in the light path direction; the infrared optical system comprises a primary mirror, a secondary mirror, an infrared third mirror and an infrared focal plane in the light path direction. According to the ultra-large field-of-view dual-waveband aperture multiplexing type optical remote sensing camera, all-weather ground investigation and surveying and mapping can be realized; primary mirrors and secondary mirrors of the visible light optical system and the infrared light optical system can be reused, the focal lengths of the two systems are different, the view fields of the visible light optical system and the infrared light optical system can be 20 degrees or above, and the ultrahigh energy utilization rate of the system is guaranteed through the total reflection mode. The camera is especially suitable for being used as a high-resolution camera of a wide-area detection, small-size and multi-spectrum integrated micro-nano satellite.

This invention proposes a device and method for suppressing zero-order diffraction spots of a spatial light modulator based on a coaxial optical system. The device comprises a laser coupler, a spatial light modulator, a movable coaxial optical system, and a subsequent imaging system, all coaxially connected via a cage-like fixing assembly. The coaxial optical system includes a first lens, a blocking assembly, and a second lens. The method includes the following steps: S1, a laser source is coupled through the laser coupler and then incident on the spatial light modulator for phase modulation, forming a composite reflected beam containing modulated and unmodulated light; S2, the composite reflected beam is introduced into the coaxial optical system for filtering; S3, the filtered beam is output to the subsequent imaging system to obtain a holographic image with suppressed bright spots. In this application, no modifications to the hardware structure of the spatial light modulator or the holographic algorithm are required. Zero-order diffraction suppression can be achieved by introducing a combination of focal plane separation and anti-pinhole blocking in the optical path, resulting in a simple and easy-to-implement structure.

The present invention discloses a method for splicing detectors with angled incidence, which belongs to the field of optical remote sensing technology and includes a focal panel assembly, a splicing base, and a splicing instrument. The focal panel assembly includes a focal plane substrate and three detectors and a grinding pad connected to the focal plane substrate. The splicing base is a high-rigidity, high-precision process tooling developed to achieve splicing of detectors with angled incidence; the splicing instrument is a core optical instrument for achieving high-precision splicing of the focal panel assembly, which can achieve high-precision three-dimensional translation and provide a high-precision fixed platform for the splicing base. The method for splicing detectors with angled incidence of the present invention is more adaptable to scenarios. On the basis of meeting the coplanarity of detector splicing, it can ensure that the entire image plane will not be blocked, and can realize the verification of the splicing effect through two angle detections, thereby improving the imaging effect.

The application discloses a digital slice scanning fast focusing system adopting a liquid lens, wherein a liquid lens, a left focusing camera and a right focusing camera are installed in the optical path of a digital slice scanner; the liquid lens is installed between an objective lens and an image-taking camera; the left focusing camera and the right focusing camera are respectively installed on the left side and the right side of the image-taking camera to collect focal plane images; a computer processing device is connected with the left focusing camera and the right focusing camera respectively to obtain a focal plane signal according to the focal plane images collected by the left focusing camera or the right focusing camera; the computer processing device is connected with a constant current source driver to send the focal plane signal; and the constant current source driver is connected with the liquid lens to send different driving currents to control the liquid lens to focus. The application adds two focusing cameras (the left focusing camera and the right focusing camera) to expand the focusing FOV to quickly obtain the focal plane signal, and then controls the liquid lens to quickly adjust to the focal plane.

The invention discloses a focal plane splicing structure, and relates to the technical field of space optical loads, the focal plane splicing structure comprises a focal plane frame, the focal plane frame is arranged to be in a hollow and one-way opening shape, and the two sides of the outer wall of the focal plane frame are symmetrically and fixedly connected with a left side focal plane group and a right side focal plane group through bolts respectively; the inner cavity wall of the focal plane frame is symmetrically and fixedly connected with a left side splicing mirror and a right side splicing mirror through bolts. According to the scheme, the structure is simple and compact, the weight is light, the device can better adapt to parts, a mixed splicing mode of optical and mechanical splicing is adopted at the same time, the device is innovative, the number of parts used in the scheme is small, the structure is simple, the reliability is high, the splicing use possibility of small-image-plane large-packaging detection is improved, and the detection efficiency is improved. And the scheme is optimal to use when the focal plane length of the detector is less than half of the packaging size.

The invention relates to the technical field of carbon sequestration and geological sequestration, and particularly discloses a slice CO2 water-rock reaction corrosion identification and pore evaluation method based on machine learning, and the method comprises the steps: firstly collecting multi-focal-plane images of the same view field of a slice before and after a reaction on a scanning electron microscope platform, and carrying out the registration; utilizing the trained U-Net instance segmentation model to automatically identify a corrosion area and extract a contour; generating a relative height map through a depth-of-field reconstruction and calibration technology in combination with a multi-focal-plane sequence, and obtaining the effective corrosion depth of each corrosion area; and carrying out volume normalization calculation based on area-depth information, and directly outputting porosity increment and spatial distribution thereof. According to the method, destructive detection is not needed, quantitative volume characterization of corrosion characteristics is achieved, the analysis efficiency and accuracy are remarkably improved, batch processing and mineral phase layering statistics are supported, and reliable data support is provided for CO2 geological storage reaction mechanism research and reservoir simulation.

The invention discloses an optical fiber coupling lens, which belongs to the technical field of optical fiber coupling and comprises a front focal plane, a second reflecting mirror, a first reflecting mirror and a rear focal plane along the optical axis direction of the optical fiber coupling lens. Wherein an incident optical fiber is placed at the front focal plane; the focus of the first reflecting mirror is positioned on a front focal plane; emergent light of the optical fiber placed on the front focal plane enters the first reflector after passing through a central hole of the second reflector, is reflected by the first reflector to become parallel light, enters the second reflector, and is reflected and focused by the second reflector; and the rear focal plane is located at the focal plane position of the second reflector, and the light reflected and focused by the second reflector is converged on the rear focal plane of the lens after passing through the central opening of the first reflector. The optical fiber coupling lens system is simple in structure, the manufacturing cost can be effectively reduced, and the processing, detection and adjustment difficulty of the lens is reduced.

The invention provides a laser radar optical performance comprehensive detection device and method, relates to the technical field of laser radar detection, and aims to solve the technical problems of single test function, insufficient universality and low test efficiency in the prior art. The device comprises a collimator objective lens used for focusing a laser light source emitted by a laser radar system; the spectroscope is used for dividing a light path of the collimator objective lens into two orthogonal conjugate focal planes; the charge-coupled device detector is arranged at the position of one conjugate focal plane and is used for receiving the laser light source focused by the collimator objective lens; the test laser light source is arranged at the position of the other conjugate focal plane and is used for generating a laser light source with the wavelength consistent with that of the laser radar system so as to simulate laser echoes at infinity; wherein the test laser light source is configured to move along the corresponding conjugate focal plane, and the optical performance of the laser radar system can be comprehensively detected by adjusting the moving position of the test laser light source.

The present application relates to optical detection device and method, specifically to a kind of snapshot point source encoding wave front detection system and method.For solving the deficiency of poor stability, complex system and delay in prior art by using phase recovery method to realize optical system aberration inversion, a kind of snapshot point source encoding wave front detection system of the present application, including first light source module, second light source module, first beam splitter, second beam splitter, microscopic objective, first plane mirror, first imaging lens, polarized camera, first light source module and second light source module are respectively used to provide first linearly polarized light and second linearly polarized light with orthogonal polarization direction, first linearly polarized light is focal plane parallel light, and second linearly polarized light is off-focus parallel light.Based on the above system, a kind of snapshot point source encoding wave front detection method of the present application includes system calibration, system adjustment, image acquisition and pre-processing and wave front inversion etc.

The invention discloses a particle directional and fixed-point transport system and method based on asymmetric astigmatism light field regulation and control, and belongs to the technical field of optical micro-control. The system comprises a laser, a cylindrical lens, a first plano-convex lens, a second plano-convex lens, a first reflector, a second reflector and a microscope objective. The cylindrical lens is controlled in an off-axis mode to enable a light beam to be incident vertically in an off-axis mode, and light intensity deviation perpendicular to the optical tweezer line direction is formed on the focal plane of the cylindrical lens. And converting the offset into light intensity gradient distribution along the optical tweezers line direction by using a reflector group, and generating the asymmetric linear optical tweezers after focusing by a microscope objective. The light field generates a directional net scattering force to drive the particles to move unidirectionally along the optical tweezers line direction while maintaining stable capture of the particles. Active modulation devices such as an acousto-optic deflector and a spatial light modulator are not needed, particle directional transportation can be achieved only through cooperative regulation and control of optical elements, and the device has the advantages of being simple in structure, low in cost and high in light field stability and is suitable for biomedical microoperation and particle control in a micro-fluidic chip.