5548 results about "Laser light" patented technology

The invention relates to the technical field of optical lens defect detection, and particularly discloses an optical lens laser-induced damage on-line detection method and system, a linear polarizer and a narrow-band filter are connected in series in a detection laser light path, non-target polarized light is filtered through polarization direction matching, meanwhile, interference of the environment and scattered light is inhibited through the narrow-band filter, and the laser-induced damage on-line detection system is obtained. According to the method, external source noise such as ambient light and non-target polarized light is reduced through polarization matching and narrow-band filtering, randomness of speckle noise is offset through multi-angle collection and signal fusion in a visual detection mode, exposure is dynamically adjusted, an image is fused to improve the signal-to-noise ratio, noise and real signals are decoupled through self-supervised learning, and the real-time performance of the system is improved. Dust interference is removed in combination with morphological operation; a deep learning reasoning model enhances the damage identification capability in a noise environment, defocusing blur caused by mechanical vibration is eliminated through phase conjugate correction, and the influence of photoelectric conversion noise, dust interference and the like on the detection efficiency and accuracy is remarkably reduced through multi-link linkage.

The invention discloses a dynamic calibration type laser surface real-time detection method and system, and the method comprises the following steps: obtaining initial calibration parameters of a laser projection module and a high-speed imaging module through a standard calibration plate, building an initial measurement coordinate system through a camera calibration method, and building a dynamic calibration model; through a dynamic calibration mechanism, calibration parameters are updated in real time, and a sub-pixel-level laser light strip center coordinate extraction method is combined, so that the detection precision is effectively improved, and tiny surface defects can be detected; by responding to changes of environmental parameters such as vibration, temperature and illumination intensity in real time and automatically triggering a calibration process, it is ensured that a high-precision detection result can still be kept in a complex industrial environment; by adopting the mode of combining the standard calibration plate and the workpiece reference area, the calibration time is shortened, and for workpieces of different models, quick adaptation can be achieved through quick migration of pre-training model parameters and a federal learning mode, and the production efficiency is improved.

The invention relates to the technical field of solar cell processing, in particular to a laser light-transmitting scribing control method and system for a solar thin-film cell. The control method comprises the steps that a large-size substrate is divided into a plurality of galvanometer view fields through a dynamic flight continuous machining mode, a continuous snake-shaped machining path is generated, the laser machining platform is driven to continuously move at the constant speed, and the galvanometer scanning system is synchronously triggered to start lineation in a splicing area in advance. According to the method, a time domain coupling equation of galvanometer scanning frequency-platform movement speed-laser pulse sequence is established, and dynamic compensation of an optical path and self-adaptive adjustment of energy density are achieved in the continuous machining process. Based on a view field expansion algorithm of a nonlinear kinematics model, the phase deviation of a scanning vector and a motion vector is effectively inhibited, and the geometric continuity of a splicing interface in ultra-long stroke machining is guaranteed.

The invention discloses a particle size measuring device based on combination of a dynamic light scattering method and a sedimentation method and a measuring method thereof. The particle size measuring device comprises a laser, a light intensity adjusting unit, a sample pool, a thermostatic bath, a PD detector, an optical fiber head, an APD detector, a data acquisition unit, a PC and a control unit. The laser emits incident laser, the incident laser passes through the light intensity adjusting unit, penetrates through the sample cell and a sample and then enters the PD detector, and a transmission light signal is collected through the data acquisition unit and transmitted to software for calculating the particle size and concentration of settled large particles; scattered light is received by an optical fiber head with a fixed angle of 90 degrees or 160-175 degrees and is converted into a digital signal by an APD detector, and the digital signal enters a data acquisition unit and is transmitted to software for calculating the particle size of particles in a non-settling nanometer range. According to the technical scheme provided by the invention, the particle size distribution information of the wide-distribution particle dispersion system in a nano-micron range can be measured in a testing process.

The invention provides an OFDR sensing system and method for rapidly positioning strain based on a time domain difference algorithm, and relates to the technical field of optical fiber sensing. The OFDR sensing system comprises a narrow linewidth tunable laser light source, a first optical fiber coupler, a main interferometer, an auxiliary interferometer and a data acquisition and signal processing module; laser emitted by the narrow linewidth tunable laser light source is divided into two paths through the first optical fiber coupler, one path of light enters the main interferometer, and the other path of light enters the auxiliary interferometer; the main interferometer and the auxiliary interferometer respectively output a main interferometer optical signal and an auxiliary interferometer optical signal to the data acquisition and signal processing module; the data acquisition and signal processing module is used for performing nonlinear compensation on the optical signal of the main interferometer by using the optical signal of the auxiliary interferometer, and performing cross-correlation operation on a reference optical signal of the main interferometer and a measurement optical signal of the main interferometer which are based on the strain-free state and the strain state of the sensing optical fiber and are subjected to nonlinear compensation; and obtaining the strain position and the strain value of the sensing optical fiber.

The invention discloses a pipeline all-position multi-layer multi-channel TIG welding bead morphology measuring device and method, and relates to the technical field of intelligent welding. A molten pool image collecting module is used for collecting morphology information of a molten pool, and the light emitting end of a laser transmitter is used for facing a welding bead; the active and passive vision module is used for collecting an image of light emitted by the laser emitter projected on a weld pool groove and identifying a weld bead corner opening position and a weld bead width, and the active and passive vision module and the weld pool image collecting module are both electrically connected with the control module; the control module can fuse image features collected by the active and passive vision module and the molten pool image collection module, the axes of the molten pool image collection module, the welding module and the active and passive vision module are located in the same plane, and the molten pool image collection module and the active and passive vision module are located on the two sides of the welding module respectively. According to the method, manual participation in the welding process can be reduced, the welding automation degree is improved, and meanwhile, the welding bead morphology measurement accuracy is improved.

The invention relates to a related light measuring device based on a bevel mirror and a control method, and solves the problem that the existing three-dimensional detection technology is insufficient in comprehensive adaptability and cannot meet the requirements of precision detection for stability, precision and data collaboration, and the related light measuring device comprises a laser emission head, a double-bevel mirror, a light path receiving module, a zoom camera and a circuit processing unit. The first bevel mirror is provided with a through hole for laser to directly irradiate a target; the light path receiving module receives and reflects the laser-to-electric signal; the second bevel mirror reflects the target and the light spot light to the camera to obtain visual information; and the circuit processing unit controls all the components, integrates laser and visual information, and realizes three-dimensional detection of the target. The method has the following effects: through the light path collaborative design of the double-bevel mirror, precise and synchronous acquisition of laser ranging signals and visual contour / light spot information is realized, so that high-precision three-dimensional detection of the distance, the flatness and the segment difference of a target object is efficiently completed.

The invention provides a solution concentration real-time detection method based on focusing offset of a compound lens, which comprises the following steps: step A, laser emitted by a laser diode is collimated into parallel light through a plano-convex lens, the parallel light is emitted into a sample cell through a glass window, and then the parallel light is emitted by the compound lens to be imaged on an image sensor; step B, the parallel light is emitted to an image sensor through a compound lens to be imaged into two light spots, the distance # imgabs0 # between the two light spots on the image sensor is recorded, and the solution concentration is inversed through the distance # imgabs1 # between the two light spots; step C, respectively detecting the temperature and the pressure intensity of the solution to be detected through a temperature sensor and a pressure sensor, and compensating the influence of the temperature and the pressure intensity on measurement through an algorithm; on the basis of light spot form analysis of the compound lens, the solution concentration is inversed, the resolution capability of a low-concentration transparent solution is improved, and the detection stability of transparent solutions such as alcohol is improved.

The invention relates to the technical field of laser processing, in particular to a laser light path rapid switching method and related equipment. The laser light path fast switching method comprises the steps that a single laser emits original laser, the original laser passes through a laser collimator or directly enters a multi-channel reflecting mirror set to adjust a transmission path, a beam expander is selectively started for beam expanding according to the machining requirement, a preliminary shaping light beam is formed, and a basic light path matched with a follow-up optical device is constructed. According to the invention, through the integrated driving mechanism and grating ruler full-closed-loop control rapid switching device, the mobile carrier pre-installed with multiple DOEs is driven to realize accurate cutting-in of a target light spot element in a light path, and the problem of rapid adaptation of multiple light spot patterns in a single laser system is solved.

The invention relates to a phase-sensitive optical time domain reflectometer based on multi-frequency reference switching. Continuous laser generated by a continuous laser is divided into a local path and a detection path through an optical coupler; the local path is input to the polarization coherent receiving module, the detection path is incident to a light intensity modulator driven by the signal generation circuit module, and the light intensity modulator is converted into a multi-frequency pulse laser sequence with intensity modulation; the multi-frequency pulse laser sequence enters the sensing optical fiber to be measured through the optical circulator; generated Rayleigh backscattered light and local continuous laser are subjected to beat frequency coherent receiving in a polarization coherent receiving module through a circulator; and the signal acquisition circuit adopts a demodulation algorithm to compensate phase drift and sensitivity difference of detection pulse demodulation signals with different frequencies so as to realize dynamic strain sensing. Compared with the prior art, the phase drift and the sensitivity difference between the frequencies are extracted to realize the compensation of the interleaved signals, and the method does not depend on the fixed reference frequency, so that the robustness and the adaptability of the system in a complex environment are remarkably enhanced.

The invention discloses a light field surface defect identification system and method based on multi-angle scattering, and relates to the field of optical image analysis. The system comprises a multi-angle scattered light field acquisition module and a defect intelligent identification module. The acquisition module obtains a hemispherical space scattered light field image of an optical element to be detected through one-time exposure of a collimation laser light source, a hemispherical dome and the like. The recognition module integrates a data preprocessing unit and an SFD-YOLO network, and on the basis of YOLOv11, the network replaces CBS in a shallow layer with a PSiam attention module to strengthen local significant feature perception, and replaces C3K2 in a deep layer with an OfficitMambaCSP module to strengthen global semantic modeling. The method comprises the steps of image acquisition, data set generation preprocessing, network training and defect identification. The problems that in the prior art, single-view-angle information is limited, and scattering data is insufficient in utilization are solved, Top1ACC reaches 95.6%, the parameter quantity is only 1.25 M, and the method is suitable for high-precision real-time detection of optical element defects.

Disclosed in the present invention are a dual electro-optic frequency comb-based laser tracking interferometric spatial coordinate measurement system and method. Multiple target mirrors are identified by means of a vision module, to guide a rotating mirror to direct laser light toward each target mirror individually. A laser tracking interferometric ranging module obtains a tracking error of the laser beam deviating from the center of the target mirror to be used for closed-loop tracking control. A light source module outputs single-frequency laser light traceable to a gas absorption peak. By controlling a light source modulation module to enable or disable an electro-optic phase modulation drive signal, dual electro-optic frequency combs or dual-frequency continuous-wave laser light is outputted. In a tracking state, the laser tracking interferometric ranging module respectively uses the two light sources to measure the absolute distance and the relative displacement of a target mirror, and the real-time distance between the target mirror and an original point is computed by means of distance fusion; the elevation angle and the azimuth angle of the target mirror are obtained in real time by means of an azimuth angle and elevation angle measurement module; tracking control and coordinate computation are carried out by means of a tracking control and signal processing module and a computer, and finally three-dimensional spatial coordinates of all the target mirrors are measured.

The air-cooled handheld laser welding gun comprises a gun body and a grip connected with the gun body, a light inlet light path and a light inlet are arranged in the grip, a light outlet light path and a light outlet are arranged in the gun body, at least one group of detachably connected lens modules is arranged in each of the light inlet light path and the light outlet light path, and the lens modules are detachably connected with the grip. The gun body is provided with an adjusting assembly for reflecting laser in the light inlet light path to the light outlet light path, a reflecting mirror is arranged in the adjusting assembly, the laser is reflected from the light inlet light path to the light outlet light path through the reflecting mirror, the air cooling assembly comprises an air cooling pipe and an air cooling channel connected with the air cooling pipe, one end of the gun body is connected with a light outlet nozzle assembly, and the other end of the gun body is connected with the light outlet nozzle assembly. The light outlet nozzle assembly is connected with a light outlet pipe and a welding nozzle. According to the welding gun, the gas path is arranged around the light path, the gas path forms a loop to cool the light path, the gun body and the grip are cooled, meanwhile, the lens on the light path can be cooled, and the service life of the welding gun and parts is prolonged.

The invention discloses an all-optical three-dimensional scanning confocal fluorescent microscopic imaging device and an implementation method thereof. According to the invention, through a deep learning driven adaptive regulation and control method, CNN is adopted to process spatial distribution data and dynamically regulate and control a phase hologram and the light intensity and phase compensation of a laser, so that the focal point of exciting light is subjected to aberration-free axial displacement, a bidirectional parallel optical scanning track of a two-dimensional scanning system is optimized, and all-optical three-dimensional scanning is realized; lSTM and TCN are combined to obtain a time sequence dependency relationship, a laser light source, an adjustable diaphragm, an electric focus-adjustable lens and a photoelectric detector are integrally controlled, efficient synchronization and automatic operation and high-speed axial focusing adjustment are realized, errors and time sequence mismatch are eliminated, optical characteristics of different samples and environmental interference are automatically adapted, and high-quality imaging is kept. The robustness and the applicable scene range of the system are improved; the method is used for model biological embryo real-time tracking, intracellular signal molecule dynamic visualization, cell membrane protein migration and aggregation observation and intracellular organelle interaction tracking.

The invention relates to the technical field of three-dimensional point cloud scanning, and discloses a three-dimensional laser scanner and a real-time point cloud scanning method and system, and the method comprises the following steps: setting a dot spacing, setting the rotating speed of a drive motor, and setting the transmitting frequency of a laser transmitting and receiving module; controlling the motor to rotate to drive the laser to emit laser; when laser starts to be emitted, the reading module collects angle parameters of the coded disc in real time and measures a laser flight time value through the laser flight time measuring module; combining the angle parameter, the laser flight time value and the laser reflection intensity value read in the last time of laser emission into a frame of data and storing the frame of data in an original data buffer area; reading frame data of the original data buffer area in real time, and calculating to obtain a three-dimensional coordinate; and taking the three-dimensional coordinates and the laser reflection intensity value as a frame of data and storing the frame of data in a result buffer area. The problem that the real-time application requirement is difficult to meet in the prior art is solved, and the method has the advantage of being capable of reducing the operand.

An optical device includes: a first optical system; and a second optical system. The first optical system includes a first light splitting device configured to split measurement light emitted from a first light source into a first measurement light and a second measurement light and then mix the split measurement light, a first mirror configured to add a first modulation signal by being moved in an entering direction of the first measurement light and reflecting the first measurement light, a second mirror configured to reflect the second measurement light, and a first light receiving device configured to receive the measurement light including a sample-derived signal and the first modulation signal and output a first light receiving signal. The second optical system includes a second light source configured to emit laser light, an optical modulator configured to add a second modulation signal to the laser light, and a second light receiving device configured to receive the laser light including a displacement signal generated by reflection on the first mirror and the second modulation signal and output a second light receiving signal.

The invention relates to the field of industrial visual inspection, and discloses a material surface defect detection system based on industrial visual inspection, which comprises a laser light source module, a light beam distribution assembly, a dark field illumination structure, a near field irradiation structure, an industrial visual inspection module, a signal processing module and a data processing module. The laser light source module is used for generating a modulated laser beam, and the laser beam distribution assembly guides the laser beam to the surface of a material; and the dark field illumination structure is matched with the near field irradiation structure to form an irradiation path with an inclined direction and a sub-wavelength scale. The industrial visual inspection module comprises an industrial camera, an image acquisition device and an image processing module and is used for acquiring and processing images of the defect area. The signal processing module is used for performing frequency domain analysis on the scattered signals; and the data processing module is used for analyzing spatial positions and forms of defects based on image and signal data. The system is suitable for fine detection and structure identification of tiny defects on the surface of a material.

The invention relates to the technical field of performance lighting equipment, in particular to a double-shaft omni-directional steering unmanned aerial vehicle laser lamp and a control method thereof. The unmanned aerial vehicle laser lamp structure comprises a transmission device and a motor, the unmanned aerial vehicle laser lamp structure can rotate by 360 degrees along the X axis and the Y axis, magnetic fluid sealing rings are adopted for packaging, high waterproofness can be achieved, the unmanned aerial vehicle laser lamp is hung below a four-axis or six-axis unmanned aerial vehicle, a space light beam system capable of freely rotating is formed, all-dimensional irradiation is achieved, and the rich three-dimensional light beam effect is created. In addition, the flight control system of the unmanned aerial vehicle can be compatible with a small unmanned aerial vehicle performance control system, so that the unmanned aerial vehicle can be accurately integrated with other unmanned aerial vehicles and cooperate with formation performance. The visual level of unmanned aerial vehicle light show is improved, compared with traditional unmanned aerial vehicle laser equipment, the system can flexibly adjust the height and the angle, the defect that existing unmanned aerial vehicle air show lacks space light beams is effectively overcome, and a more dynamic and immersive light and shadow effect can be constructed in the air in combination with fine control.

The invention belongs to the technical field of cutting machine tools, and particularly relates to equipment for laser cutting, in particular to laser cutting equipment and a cutting process. The laser cutting equipment comprises a working platform and a laser cutting device, a driving mechanism; a bearing tray; and a laser cutting mechanism. The first negative pressure adsorption pipeline is arranged at the bottom of the box body, during laser cutting, smoke dust caused by cutting is directly sucked from the bottom of a material plate, the amount of the smoke dust upwelling to a laser light path is reduced, the total amount of the smoke dust attached to a lens is reduced, and the lens is prevented from being overheated; only the air inlet hole and the air outlet hole corresponding to the to-be-cut area are exposed, so that the negative pressure adsorption force acts on the real-time machining area in a concentrated mode, the negative pressure suction force is concentrated to the cutting area, the smoke dust adsorption effect is improved, the amount of smoke dust upwelling to a laser light path is further reduced, and the lens is prevented from being overheated.

The invention discloses a biaxial coaxiality in-situ detection system and method based on optical dynamic reference coupling, relates to the field of real-time calibration of photoelectric tracking equipment, and solves the technical defects of reference transmission errors and dynamic response delay caused by mechanical stress deformation in traditional contact measurement. The system comprises a pitching assembly, a laser light source, a two-dimensional moving platform, a stable platform, a base, a standard clamping ring, a left shaft, a right shaft and a photosensitive position sensor. A stable platform is arranged on the base, a two-dimensional moving platform is arranged on the stable platform, a laser light source emitted by the laser device penetrates through a standard clamping ring through hole and forms light spots on the photosensitive position sensors, and the two photosensitive position sensors achieve coordinate correlation mapping through a dynamic coordinate system mapping algorithm and obtain two coordinate systems at the same time; the standard clamping rings are symmetrically installed on the end faces of the two sides of the left shaft and the right shaft, and the back photosensitive position sensors are symmetrically arranged in the gap between the left shaft and the right shaft. And data collaborative acquisition is realized through the synchronous controller.

The invention relates to the technical field of water-guided laser, and discloses a water-guided laser coupling device, and the device comprises a base which is internally provided with a water inlet channel and an annular flow channel, and the water inlet channel is communicated with the annular flow channel; the light-transmitting assembly is provided with a light-transmitting window, the light-transmitting window is embedded in the base, and the light-transmitting window is used for allowing laser to penetrate through; the supporting column is arranged in the base, a water outlet channel is formed in the supporting column, a nozzle piece is arranged at the top of the supporting column, and a nozzle opening of the nozzle piece is communicated with the water outlet channel and right faces the light inlet window; and the rectifying net is arranged between the light inlet window and the nozzle piece, a water passing gap exists between the rectifying net and the light inlet window, and the water passing gap communicates with the annular flow channel. The water flow is broken into small-scale vortexes when flowing through the rectification net from the water passing gap, the small-scale vortexes are gradually dissipated under the action of viscous dissipation, the turbulence of the water flow is further reduced, disturbance in the water flow is reduced, and the effective working range and the machining precision of the water-guided laser are improved.

The invention provides a spatial light modulator, a self-checking device thereof and a light computing device, and relates to the technical field of optical modulation.The spatial light modulator comprises an incident waveguide structure, a covering plate, a liquid crystal layer, a substrate and an emergent waveguide structure; the incident waveguide structure is optically coupled with the cover plate and is used for guiding externally incident laser into the cover plate at a preset angle; the covering plate is used for enabling laser to be propagated in the covering plate in a total reflection form; the substrate bears the liquid crystal layer, integrates the driving circuit and is used for applying regulation and control voltage to the liquid crystal layer; the liquid crystal layer is arranged on the lower side of the covering plate and used for conducting phase modulation on the laser transmitted to the liquid crystal layer in a total reflection mode in response to the regulation voltage. And the emergent waveguide structure is optically coupled with the covering plate and is used for guiding the laser modulated by the liquid crystal layer out of the covering plate to a free space. According to the spatial light modulator, efficient spatial modulation and accurate control of the light field are realized, so that the integration and function accuracy of the spatial light modulator in self-inspection and light calculation are improved.

The invention relates to the technical field of target distance detection and 3D scanning reconstruction, and discloses a coaxial scanning type ultra-long distance detection laser radar system, which comprises a laser light source module, which adopts a 1550nm optical fiber laser to output high-power laser, and ensures sufficient laser energy and human eye safety; according to the invention, by adopting the high-power 1550nm fiber laser, the ultra-long distance detection is realized on the premise of ensuring the safety of human eyes, and the detection range of more than 10km can be reached, so that the limitation that the detection distance of the traditional laser radar is only 500m is broken; according to the invention, by selecting the 1550nm laser device which is safer to human eyes and greatly improving the laser power to kilowatt and even myriawatt levels, stronger echo signals are realized, so that the detection signal-to-noise ratio is remarkably improved; the micro-lens array is adopted to replace a traditional DOE diffractive optical element, efficient beam shaping of a one-dimensional or two-dimensional dot matrix is achieved through flexible regulation and control of the curvature radius and the distance of the micro-lenses, meanwhile, the manufacturing cost is reduced, and the design freedom degree is expanded.

A spectroscopic apparatus including an analysis optical system, a length measuring optical system, and a calculation apparatus and performing spectroscopic analysis of a sample, the analysis optical system including a moving mirror having a first reflection surface and a second reflection surface, the moving mirror configured to be translated, a gas cell configured to encapsulate a gas and add a light absorption signal to the analysis light, and a first light receiver configured to receive the analysis light containing a sample derived signal, a first modulation signal, and the light absorption signal, the length measuring optical system including a length measuring optical system configured to acquire a displacement signal corresponding to the position of the moving mirror from laser light reflected off the second reflection surface, the calculation apparatus including a moving mirror position calculator, a light intensity calculator, a Fourier transformer, and a moving mirror position correction section.

The invention discloses a height measurement method, a marking method and system, a storage medium and a program product, and relates to the technical field of laser marking, and the method comprises the steps: transmitting first laser through a laser, and projecting a preset first number of first light spots to the surface of a measured object; shooting the first light spot through a monocular camera to obtain a first pixel coordinate of the center of the first light spot in a camera coordinate system; a preset second number of standard scale points on a target laser light path and the height of each standard scale point are determined, the standard scale points are projected to the camera coordinate system, second pixel coordinates of the standard scale points in the camera coordinate system are obtained, and the target laser light path is the light path of the first laser; and calculating the distance between the first pixel coordinate and the second pixel coordinate, determining a target standard scale point with the minimum distance, and taking the height of the target standard scale point as the height of the measured object. According to the invention, the height measurement cost is reduced.

The invention is suitable for the technical field of gas concentration monitoring, and provides a high-precision gas detection self-adaptive light intensity noise suppression system and method, and the system comprises a detection module, a gas input module and an adjustment module. The system is compact in structure, not only effectively inhibits multi-scale light intensity noise introduced by a laser light source, but also remarkably improves the detection precision on the premise of guaranteeing quick response of the system. Light intensity noise is sensed by adopting a common-optical-axis optical path design, and self-adaptive suppression of the light intensity noise is realized in combination with a dual-time-scale noise feature extraction method. The method has a quick response capability while maintaining high precision, and provides a high-reliability detection means for oil-gas exploration, safety production and other scenes.

An optical arrangement for a LIDAR system includes a laser, scanner, fold mirror, lens, and sensors. Adding a wedge-shaped optical element creates an auxiliary field of view, when positioned to overlie an edge portion of the lens. The wedge-shaped optical element may have a variable transparency preventing reception by the sensors of excessive signals from close targets. The sensors may be: a plurality of sensors with unique lengths / widths, arranged to form a linear array; or sensors with the same length / width, but positioned to form an arcuate shape, compensating for an arcuate scan line; or two columns of sensors, one with a field of view in focus at far field positions, and the other in focus at near field positions, correcting for parallax effect / error; or a column of highly sensitive sensors surrounded by a plurality of guard rail sensors having higher immunity to damage from stray laser light.

A laser processing apparatus includes a laser oscillator that oscillates processing laser light to be incident on a processing point on a processing surface of a workpiece, a coupling mirror that deflects or transmits the processing laser light and measurement light to be incident on the processing point toward the processing point, a measurement light deflection unit that changes an incident angle of the measurement light on the coupling mirror, a lens that concentrates the processing laser light and the measurement light on the processing point, a controller that controls the laser oscillator and the measurement light deflection unit, a measurement processor that measures a depth of a keyhole generated at the processing point by the processing laser light by using an optical interference signal based on an interference generated by an optical path difference between the measurement light reflected at the processing point and reference light, and a beam position measurement unit that measures positions of the processing laser light and the measurement light.

The utility model discloses an ultrafast space-time light field measuring system, which performs dispersion separation on an interference light field generated after superposition of a laser pulse to be measured and a reference pulse, and performs wavelength screening on the interference light field after dispersion separation by using a wavelength screening element to obtain a laser light field with a target wavelength. Acquiring light field complex amplitude information corresponding to the laser light field of the target wavelength; and reconstructing according to the light field complex amplitude information to obtain a light field corresponding to the laser pulse to be measured. According to the system disclosed by the utility model, the delay between the signal light and the reference light in the measured laser pulse does not need to be regulated and controlled, and the ultrafast space-time light field can be reconstructed only by enabling the same-frequency components to interfere in the same spatial position to obtain the interference pattern of each frequency. The system provided by the utility model has the characteristics of convenience in implementation, interference resistance, low background noise, low data volume, high measurement efficiency and high measurement result accuracy.

The invention discloses a radiotherapy laser positioning system and method, the system comprises at least three laser lamp systems, corresponding optical cameras and a computer control system, the laser lamp systems form cross cursors through two linear emitters installed in a T shape, the cross cursors are respectively arranged on the left side, the right side and the upper side of a treatment device, and a three-dimensional space positioning coordinate system is constructed. The optical camera automatically collects images of the body surface mark points of the patient and the laser cursor, and the computer control system carries out image processing, feature extraction and three-dimensional deviation calculation and feeds back deviation information to the treatment bed or the laser lamp system; and the electric control system drives the fine adjustment mechanism to perform three-degree-of-freedom accurate adjustment of translation, rotation and inclination until the mark point coincides with the cursor. According to the invention, optical automatic identification is adopted to replace manual naked eye positioning, personal errors are eliminated, rapid and automatic correction is realized, and the accuracy and efficiency of radiotherapy positioning are significantly improved.