185 results about "Wavefront sensor" patented technology

The invention provides a subjective optometry prediction method combining wavefront aberration and optical signals. According to the method, eyeball wavefront aberration data are measured through a wavefront sensor, cornea, crystal and retina biological parameters are obtained by combining multi-view-field scanning of a galvanometer system, and after high-credibility data points are screened, a gradient refractive index eyeball three-dimensional model is constructed by adopting an NURBS algorithm; using finite element analysis to optimize cornea stress distribution, iteratively correcting the model through a deformation energy function, and dynamically compensating eyeball motion errors based on eye movement tracking data; and generating a multi-field-angle visual chart image through ray tracing simulation, and predicting a subjective optometry result in combination with an image quality evaluation algorithm. According to the method, high-precision modeling, dynamic error suppression and intelligent simulation technologies are fused, the optometry prediction accuracy, the personalized adaptation degree and the dynamic scene adaptability are remarkably improved, and an efficient and reliable solution is provided for refraction correction.

The invention discloses a Hartmann wavefront sensor wavefront detection method and device based on sub-aperture time domain information windowing, and belongs to the technical field of wavefront detection.The method comprises the steps that a light spot array image of a Hartmann wavefront sensor with dynamically fluctuating light intensity is collected; segmenting effective sub-apertures according to the design arrangement of the Hartmann wavefront sensor sub-apertures, and obtaining the mass center positions and signal-to-noise ratios of the preorder multi-frame effective sub-apertures; calculating the signal-to-noise ratio of each effective sub-aperture of the current frame of light spot array image by using the same method as the step 1; selecting a light spot positioning algorithm according to the signal-to-noise ratio of each effective sub-aperture obtained in the step 2; and obtaining a slope vector of the detection wavefront of the current frame according to the centroid positions of all the effective sub-apertures of the current frame, and reconstructing the wavefront by adopting a wavefront restoration algorithm. According to the invention, the wavefront detection precision of the Hartmann wavefront sensor in a complex environment can be improved, the sudden change of the wavefront slope can be avoided by means of the time domain continuity constraint, and the system robustness is enhanced.

The invention relates to a multi-spectral wavefront aberration restoration method and system based on double roof prisms, and the method comprises the following steps: taking a sub-pupil image as the input of a classification model, obtaining classification feature data, and carrying out the data expansion of the classification feature data, the sub pupil image is obtained by inputting incident wavefront aberration into a simulation light path of the double-ridge prism wavefront sensor, the double-ridge prism wavefront sensor comprises two groups of double-ridge prisms, each group of double-ridge prisms comprises two ridge prisms which are vertically and oppositely arranged, the characteristics of the ridge prisms are equal, and the characteristics of the double-ridge prisms are equal. The two groups of double-roof prisms are made of a material combination for eliminating chromatic aberration; splicing the sub pupil images and the classification feature data after data expansion to serve as input of a regression model, and obtaining a Zernike coefficient matrix corresponding to incident wavefront aberration; and according to the Zernike coefficient matrix corresponding to the incident wavefront aberration and the Zernike polynomial, obtaining a recovered wavefront aberration. Compared with the prior art, the method has the advantage that the wavefront aberration recovery accuracy is improved.

The invention relates to the technical field of laser beam shaping, discloses an active test method and system for a circuit breaker, and is used for solving the problem that the self-adaptive shaping capability of a CO2 laser beam is difficult to improve by the existing method. Firstly, a stable light path is constructed, and the stability of the light path is ensured through mechanical limiting, a thermal management module and multi-stage optical alignment; then low-power calibration is carried out, a deformable mirror initial driving table is generated through a least square inversion algorithm, and a flat-topped beam reference is established; data are collected through a wavefront sensor, a high-order mode is reconstructed, the voltage of a deformable mirror is dynamically refreshed, and wavefront control and scanning motion synchronization is ensured in combination with scanning galvanometer time sequence synchronization, closed-loop control and exception handling; monitoring the temperature of the deformable mirror, starting water-cooling adjustment, and correcting the driving table to cope with the heat effect; finally, a safety system is constructed, laser power, wavefront distortion and deformable mirror stroke parameters are monitored, dry gas purging is conducted on the diffractive optical element regularly, and safety guarantee and performance verification of the whole process are achieved.

The invention discloses a high-precision optical element processing system based on ion beam shaping and self-adaptive detection, the optical element processing system comprises an ion beam processing module, a self-adaptive optical detection module and an intelligent control module, the ion beam processing module comprises an ion source system and a six-axis linkage workpiece table, the self-adaptive optical detection module comprises a wavelength tuning interferometer and a Hartmann wavefront sensor, the intelligent control module comprises a machining path optimization unit and a stress compensation unit, and the system realizes sub-nano-scale real-time feedback of machining errors through online detection of the Hartmann wavefront sensor and the wavelength tuning interferometer; the device breaks through the hysteresis of traditional off-line detection, solves the problem of machining deformation of ultrathin elements, supports machining of special-shaped elements such as aspheric surfaces, off-axis paraboloids and micro-lens arrays, and is suitable for different materials due to the modular design by allowing a detection module or a machining module to be replaced.

The invention provides a slit-type spectral imaging method based on filtering phase reconstruction and a grating spectrometer. The method comprises the following steps: measuring wavefront aberration of a slit-type grating imaging spectrometer before slit filtering by using a wavefront sensor; based on a slit filtering principle, reconstructing a phase function after slit filtering by using wavefront aberration before slit filtering; and capturing a slit image, and reconstructing the slit image by using the reconstructed filtered phase function of the slit to obtain a final reconstructed image. According to the method, effective recovery of the slit imaging data of the grating spectrometer based on the slit is realized, the influence of optical aberration and image noise on the spectrum and spatial resolution of the spectrometer is effectively eliminated, and the slit imaging quality is remarkably improved and is close to the diffraction limit.

The invention provides a light beam wavefront measuring device, a control method of the light beam wavefront measuring device, a laser system and electronic equipment. By introducing the first adjusting module and the second adjusting module, the height and the posture of the sensing module can be accurately adjusted, so that high-precision wavefront measurement of a large-size light beam is realized. A plurality of Hartmann lattice diagrams collected at different heights are spliced to generate a complete Hartmann lattice diagram with a larger size, so that the problem of insufficient wavefront measurement resolution caused by sensing size limitation of a single Hartmann wavefront sensor is solved. Besides, through the accurate control of the control module and the optimization of the splicing algorithm, the connection of the spliced lattice diagrams in the overlapping area is smoother, the accuracy and continuity of the measurement result are ensured, and the wavefront measurement precision and reliability of the large-size light beam are improved.

The invention discloses a Shack-Hartmann wavefront sensing method and system based on a cross-domain corresponding model. Comprising the following steps: acquiring Shack-Hartmann light spot diagrams and corresponding real wavefront phases under different wavefront distortion conditions, and constructing a sample data set; constructing a cross-domain corresponding model and a loss function thereof; training a cross-domain corresponding model by using the sample data set in combination with a loss function; and inputting a Shack-Hartmann light spot diagram of a biological tissue to be predicted into the trained model to obtain a reconstructed wavefront phase, and completing adaptive correction of the induced aberration of the biological tissue by using a conjugate phase of the reconstructed wavefront phase. According to the invention, the mapping relation between the intensity information domain of the micro-lens array light spots and the complex wavefront phase domain is constructed through the cross-domain corresponding model, the spatial bandwidth product of the Shack-Hartmann wavefront sensor is effectively expanded, the spatial resolution and the dynamic range are both considered, and high-precision robust wavefront sensing under the complex aberration condition is realized.

The embodiment of the invention provides a method and device for automatically adjusting parameters of an adaptive optical system based on reinforcement learning, a storage medium and electronic equipment, and relates to the field of reinforcement learning and adaptive optics, and the method comprises the steps that an AO system observes a target and collects related data; extracting features of the wavefront sensor image and the far-field image by using a cross attention mechanism; the extracted features and the collected data are spliced to form current system state representation; using a reinforcement learning strategy network and predicting action parameters according to the current state; predicting the next state based on the action of the strategy network and the current system state by combining the environment model, and calculating a corresponding reward value by using a reward function; and collecting a complete interaction track to update the strategy network and environment model. According to the technical scheme, the key parameters of the AO system can be automatically adjusted in a dynamic environment, the imaging quality of the system under complex conditions is improved, and the requirement for manual intervention is remarkably reduced.

The invention relates to the technical field of free space optical communication, in particular to an atmospheric turbulence adaptive optical compensation method for wireless laser communication, which comprises the following steps of: performing light beam coarse tracking by using a fast reflector to eliminate tilt drift; monitoring the received light intensity of the wavefront sensor in real time, and setting a threshold value for mode judgment; when a channel is good, a Kalman filtering algorithm is adopted to predict and compensate system delay, modal decoupling is carried out on reconstructed wavefront, a large-stroke deformable mirror is controlled to correct low-frequency large-amplitude aberration, and a micro-electro-mechanical deformable mirror is controlled to correct high-frequency residual error; and when the channel is in deep fading or the detector fails, the blind optimization mode is automatically switched, the state of the large-stroke deformable mirror is locked, and SPGD iterative control is applied to the micro-electro-mechanical deformable mirror based on the communication light intensity. According to the invention, through a double-deformable mirror frequency division cooperation and hybrid sensing strategy, the problems of insufficient bandwidth, limited stroke, easy interruption and the like of a traditional system under strong turbulence are effectively solved, and the optical fiber coupling efficiency and the robustness of a communication link are significantly improved.

The invention relates to the technical field of Shack-Hartmann wavefront sensors, in particular to a high-time-resolution Shack-Hartmann wavefront sensor based on an event camera, which comprises a regularly arranged microlens array and an event camera based on a neuromorphic visual detection mechanism, the event camera is located on a focal plane of the microlens array; the micro-lens array divides a high-dynamic distortion light field incident on the micro-lens array and focuses the high-dynamic distortion light field on an event camera located on a micro-lens focal plane, and the event camera is used for receiving incident photons; the event camera converts the light intensity of the incident light field and outputs the light intensity as an event stream signal. In view of a unique response mechanism of the event camera, the method has high-time-resolution wavefront sensing capability; meanwhile, since the pixels in the event camera asynchronously and independently respond to the light intensity change of the incident light field, compared with a traditional camera based on the frame detection principle, the data volume is remarkably reduced, and the data transmission and processing pressure at the rear end is reduced.

The invention provides a fundus camera system integrated with adaptive optics and a correction method, and relates to the technical field of ophthalmology imaging. The fundus camera system comprises a beacon light source, an imaging light source and an imaging sensor; the device comprises a wavefront sensor, a wavefront correction device and a control module, and the wavefront correction device comprises a focusing lens group and a deformable reflector; the focusing lens group and the deformable reflector are arranged in the same light path from the beacon light source to human eyes and from the human eyes to the wavefront sensor; moreover, the control module executes a two-step closed-loop control strategy of first focusing and second correction: firstly, based on a first measurement result of the wavefront sensor, the focusing lens group is driven to move so as to compensate low-order aberration; and after the focusing is completed, the deformable reflector is driven to deform based on the subsequent measurement result of the wavefront sensor so as to compensate the high-order aberration in a closed-loop manner. On the basis of inheriting the advantage of rapid focusing in the prior art, the self-adaptive optical technology is further integrated, so that the limitation of high-order aberration on resolution is solved.

A system and a method for measuring, correcting, and implementing real-time adjustments for aero-optical effects for vehicle-based optical systems used in high speed or turbulent scenarios are provided. The system and method may include obtaining, via an imaging system, a wavefront measurement of air flow in a high speed or turbulent environment. The imaging system may include a wavefront sensor and optical components within a module and configured for manipulating a laser beam, and an optical window for transmitting the laser beam in-and-out through the optical window (e.g., in a beam director or “turret”). The imaging system may comprise, outside the module, a reflector or mirror positioned along an optical axis and configured to receive and reflect the laser beam from the optical window. The method may include determining wavefront distortions of the laser beam based on the wavefront measurement and determining optical degradation based on the wavefront distortions.

The invention discloses a self-adaptive optical distortion compensation device and compensation method based on high-speed closed-loop control, and the device comprises an optical path front-end interface which is used for connecting a coupling wind tunnel or a laser emission system; the wavefront sensor is used for measuring a local wavefront slope by adopting a distributed array; the FPGA controller comprises a wavefront reconstruction processor and a closed-loop logic controller and is used for reconstructing wavefront and generating a control instruction; the MEMS deformable mirror array comprises a plurality of MEMS drivers and is used for correcting a wavefront phase; the feedback monitoring module is used for performing dual verification through deformation capacitance measurement and CCD image feedback; and the imaging / laser output end is used for converting the corrected optical signal into an image and outputting the image. The method can be widely applied to the fields of high-speed aircraft wind tunnel testing, laser communication, infrared imaging guide head calibration, high-energy laser beam shaping and the like, a programmable hardware platform, a high-speed parallel operation structure and a predictive control algorithm are introduced, and unprecedented sub-microsecond closed-loop compensation is achieved.

This invention relates to an interferometric measurement method and apparatus for large warp wafers, belonging to the field of optical detection and semiconductor measurement technology. The detection light is polarized and birefringently split to form P-beams and S-beams, which are then further divided into P-reference beams, S-silicon beams, S-reference beams, and P-silicon beams, respectively. By adjusting the spatial orientation of the reference mirror and the wafer under test, and using an aperture for spatial filtering, the P-reference beam and S-silicon beam are allowed to enter the subsequent optical path, while the S-reference beam and P-silicon beam are blocked. The S-silicon beam forms a measurement wavefront carrying information about the surface shape of the wafer under test. The P-reference beam is modulated by a deformable mirror to form a modulated reference wavefront similar to the measurement wavefront. The two form a resolvable interference fringe pattern at the camera. A wavefront sensor measures the surface shape information of the deformable mirror, and a calculation system obtains the surface shape information of the wafer under test based on the deformable mirror surface shape information and the relative surface shape change. This invention can reduce the interference fringe density in the detection of large warp wafers, reduce splicing measurement errors, and improve detection efficiency and accuracy.

This invention relates to the field of optical measurement technology and discloses a distortion measurement method for a PDV and Hartmann wavefront sensor optical system. The method includes acquiring interference data of the measurement environment in which the optical system is located, analyzing and calculating the interference correction index of the measurement environment, classifying the measurement environment into weak or strong interference environments, and correcting the initial distortion in a strong interference environment. This invention introduces a measurement contribution coefficient calculation mechanism based on signal-to-noise ratio, spatial coverage, and dynamic response time constant, which adaptively allocates the weights of different sensors in the fusion process, thereby improving the accuracy and reliability of distortion reconstruction. More importantly, by constructing an environmental interference correction model that includes temperature, vibration acceleration, and air refractive index, and by quantitatively evaluating the measurement environment through the interference correction index, it can effectively correct the initial distortion results in a strong interference environment.

The invention discloses a laser powder bed sheet pattern distortion real-time correction system and method based on a phase type light valve, and relates to the technical field of metal additive manufacturing. The system comprises a polarization laser, a beam expanding and collimating unit, a reflecting mirror, a phase-type spatial light modulator, a reflecting mirror, a relay optical system, a galvanometer / field lens system, a movable spectroscope, a reference plane mirror and a forming cylinder. A double-loop correction system with a position sensitive detector as an absolute reference and a wavefront sensor as direct feedback is constructed, information of the position sensitive detector and the wavefront sensor is unified in a phase domain through a frequency domain fusion algorithm, and a comprehensive compensation phase diagram capable of completing pattern generation and distortion correction at the same time is generated. And loading to a phase type light valve to carry out high-power laser patterning modulation, and melting metal powder of a powder bed.

The present application relates to the technical field of laser detection, in particular to a laser striking target detection device and method for terminal defense. Firstly, the peak intensity of the light spot and the deflection vector of each channel of the wavefront sensor are collected in a single frame detection period, the real-time light intensity characteristics and the circuit noise are combined to generate a servo light intensity filtering threshold, the effective channel set with calculation value is screened out by dynamically adapting to the battlefield noise fluctuation; the direction consistency of the deflection vectors of the adjacent effective channels is calculated, the light spot connected weight network with coherent weight is constructed, the sub-aperture grouping area is obtained by clustering, and the automatic aggregation of the scattered same target light spots is realized; then the integrated light intensity connectivity is generated by fusing the peak intensity of the light spot and the local connected weight, the signal intensity and the spatial correlation attribute are considered, the real target tracking effective area is accurately stripped out, and finally the calculation accuracy is greatly improved by relying on the channel number characteristics and the deflection vector calculation servo command in the area.

The invention relates to the technical field of in-orbit image quality correction, and particularly provides a method for constructing PSF (Point Spread Function) relationships of different view fields based on machine learning, which comprises the following steps of: constructing a spliced reflector system model by utilizing simulation software, and obtaining a plurality of groups of training sets and test sets comprising different view fields and view field PSF through simulation; training the established quantification network by using the training set, estimating other view field PSF according to the known view field PSF, detecting the training condition of the quantification network by using the test set, and evaluating the quantification network according to the PSF estimation of the output view field of the quantification network and the view field PSF acquired by the telescope system model. Quantification network optimization training is completed, the trained quantification network is utilized to acquire a specific field of view PSF in an in-orbit mode according to a wavefront sensor to carry out PSF estimation of any field of view, and then image restoration is achieved. View field PSF estimation is realized through the neural network, the traditional view field PSF acquisition and view field PSF analysis and derivation process is simplified, and the image restoration precision is improved.

Device for modulating a laser beam, including a deformable mirror with a reflective surface to receive an incident laser beam and to reflect a corresponding reflected laser beam provided with an output wavefront, and an actuator for deforming the reflective surface. The device also includes a detection system having an electromagnetic radiation source to emit a control beam incident on the reflective surface, and a wavefront sensor to intercept the reflected control beam reflected by the reflective surface to detect measurements of the wavefront of the reflected control beam and generate corresponding measurement signals. The device further includes a logic control unit, which receives the measurement signals, associates them with corresponding forms of the output wavefront of the reflected laser beam, actuates the actuator to deform the reflective surface in order to feedback control the output wavefront of the reflected laser beam.

The invention discloses a phase difference wavefront-image estimation method based on depth image prior. The method comprises the following steps: firstly, constructing a forward physical model of an incoherent imaging system, and generating an observation image with out-of-focus aberration by introducing phase difference; and then using a depth image prior network to jointly optimize image domain loss and wavefront domain loss under the condition of no external training data by taking the consistency of an observation image and a model generation image as a constraint so as to simultaneously obtain a high-quality recovered image and accurate wavefront estimation. The method provided by the invention can realize accurate wavefront estimation and high-quality image recovery under the condition of large aberration under the condition of only needing a small number of acquired images, and has the advantages of strong anti-noise capability, no need of an additional wavefront sensor and low system complexity. The method can be widely applied to fluorescence microscopic imaging and other high-resolution microscopic imaging technologies, and the imaging resolution and the image quality are improved.

The invention discloses an optical view field expansion and dynamic distortion compensation method for light field display, and particularly relates to the technical field of light field display, and the method comprises the steps: determining a configuration scheme through building a collaborative structure parameter model of a microlens array and a free-form surface optical element; then, the focal length distribution of the micro-lens array and the curvature distribution of the free-form surface optical element are adjusted, so that the expansion of an optical view field is realized; acquiring light information in an expanded view field range by using a wavefront sensor, and establishing an optical distortion mathematical model; calculating wavefront error distribution based on an optical error inversion algorithm and generating a compensation control signal; and adjusting response parameters of the optical element according to the compensation control signal, correcting the light wavefront, feeding back the corrected light field information to update wavefront error distribution, and iteratively generating a new compensation control signal. According to the invention, a light field display field angle can be effectively expanded, distortion after field expansion is reduced, and good application compatibility is achieved.

The invention relates to a method and system for measuring the lateral velocity of a target based on composite modulation of polarization and orbital angular momentum, and belongs to the field of laser velocity measurement. The invention aims to solve the problem that existing laser lateral velocity measurement methods and technologies cannot accurately measure the lateral velocity of a moving target in atmospheric turbulence and determine the direction of the velocity. The method of the invention comprises the following steps: S1. Modulating a laser signal to generate a dual-mode vortex beam with 1st and 4th order superposition, compositely modulating the laser signal with polarization and orbital angular momentum with a Gaussian beam to generate a modulation signal, and irradiating the target object with atmospheric turbulence to generate an echo signal; S2. Using a wavefront sensor to obtain the distorted phase of the polarization component of the Gaussian beam, generating a compensation phase to perform phase correction on the dual-mode vortex beam; S3. Using an array detector to detect the polarization component of the dual-mode vortex beam after phase compensation correction, the polarization component of the dual-mode vortex beam is used to obtain three lateral Doppler effect spot areas of the echo light field, which are then detected and calculated by the array detector to determine the magnitude and direction of the lateral velocity of the moving target.

This disclosure relates to methods and devices for designing customized contact lenses, by initially making dynamic wavefront sensor measurements through a trial contact lens that is fitted on an eye, and then calculating a WaveFront Guided (WFG) correction to be applied to the trial contact lens that reduces the RMS level of aberrations as much as practically possible. The output of the wavefront correction program is a customized lathe file that the manufacturer can use to make customized contact lenses on a lathe. The method works best for soft contact lenses and scleral lenses.

The present invention discloses a laser amplifier based on wavefront aberration correction, which relates to the technical field of lasers. It includes a laser source, a gain medium, a wavefront sensor, an adaptive optical wavefront correction module, and a feedback control system. The laser source is connected to the gain medium through a first optical coupler. The laser beam amplified by the gain medium is output through a second optical coupler. The wavefront sensor is connected to the output end of the gain medium. The feedback control system is connected to the wavefront sensor and the adaptive optical wavefront correction module through a data bus, and automatically generates a correction signal according to the wavefront aberration data. By installing the feedback control system, the present invention realizes the function of real-time adjusting correction parameters based on wavefront aberration, solves the problem that traditional laser amplifiers are difficult to monitor and correct wavefront aberration caused by optical system errors or environmental disturbances in real time, improves the focusing performance and transmission efficiency of the laser beam, and maintains stable and high-quality beam output.

This invention discloses a method for restoring turbulent degradation images based on complex amplitude detection, belonging to the field of computational optics imaging technology. This method constructs a computational optics imaging system without a hardware correction unit. It utilizes a wavefront sensor and an imaging sensor to simultaneously acquire Hartmann images and target degradation images. A computational unit performs wavefront complex amplitude reconstruction and aberration correction. Based on this, a physically constrained end-to-end neural network architecture is designed. By reconstructing the wavefront complex amplitude, it achieves accurate mapping and inference from the Hartmann image to the point spread function of the imaging system. Finally, a multi-scale deconvolutional network is combined to complete high-quality restoration of the turbulent degradation image. This invention eliminates the need for a hardware corrector, overcomes the physical limitations of traditional adaptive optics, effectively solves the problem of insufficient point spread function accuracy, and enables time-delay-free and highly efficient turbulent image restoration under low-cost conditions.

A system for illuminating a target in the presence of atmospheric turbulence includes a coherent beam combining (CBC) subsystem, an atmospheric wave-front sensor (AWS) subsystem, a multi-channel photo-detector (MCPD) subsystem, an auxiliary light source, and a receiving optical aperture. The CBC subsystem forms a multiplicity of CBC sub-beams and an reference beam, all of which fall in a wavelength band that is different from that of the auxiliary light source. The auxiliary light source may be a laser or a portion of the solar spectrum of the Sun. An AWS controller provides closed-loop compensation of atmospheric turbulence for low power auxiliary reflection and reference beams. A MCPD controller provides closed-loop compensation of high-frequency laser noise and transfers the wavefront correction from the reference to the high power CBC laser. The frequency of the MCPD controller is at least an order of magnitude greater than the bandwidth of the AWS controller.

The application discloses a kind of based on voltage modulation's deformable mirror slope response matrix measurement method and device, belong to adaptive optics technical field, this method includes: the range of influence of single driver is calculated, and driver is grouped;According to the sampling frequency of Hartmann wavefront sensor, the frequency response characteristics of deformable mirror, generate the voltage control signal for controlling deformable mirror;According to driver group number, voltage control signal is applied to all drivers and the wavefront sensor slope signal of each group driver is recorded;Wavefront sensor slope signal is bidirectional filtering, the slope signal corresponding to each driver is recovered, the difference of each slope signal and its corresponding voltage control signal phase is calculated, voltage control signal is truncated, and the response matrix of deformable mirror is obtained.The application realizes that the time of deformable mirror slope response matrix measurement is effectively shortened, avoids the problem of the decline of response matrix calculation accuracy due to voltage control signal and slope signal phase misalignment.

The invention discloses a defect detection method based on light wavefront. The defect detection method comprises the following steps: arranging an object to be detected on a base; providing a laser device which comprises a laser pump and a laser light source and emits a first laser beam towards the detection part of the object to be detected; providing a first light wavefront sensor, wherein the first light wavefront sensor receives first reflected light of the first laser beam reflected by the detection part of the to-be-detected object to generate a first reflected light signal, or receives first penetrating light of the first laser beam penetrating through the detection part of the to-be-detected object to generate a first penetrating light signal; providing a waveform generator which is electrically connected with the first optical wavefront sensor, and receiving the first reflected light signal or the first penetrating light signal by the waveform generator to generate a first detection oscillogram; the invention further provides a defect detection system based on the light wavefront.

An anisoplanatic aberration correction method and apparatus for adaptive optical linear beam scanning imaging. The method comprises: in an adaptive optical linear beam scanning imaging system, performing temporal correction on an anisoplanatic region aberration in a linear beam scanning direction, and performing regional correction on an anisoplanatic region aberration in a linear beam direction. According to the method, the limitation of an isoplanatic region on an adaptive optical imaging field of view can be overcome, and wide field of view aberration correction and high-resolution imaging of a retina is realized. According to the provided method and apparatus for temporal and regional correction of a wide field of view anisoplanatic aberration, the wide field of view aberration correction can be completed by means of only a single wavefront sensor and a single wavefront corrector, such that almost none of the system complexities is increased.