1699 results about "Galvanometer" patented technology

The present invention provides the laser irradiation apparatus that has a galvanometer mirror and an f-theta lens optical system, can offset the change of the energy due to the transmittance change of the f-theta lens, and can scan a laser beam while the change of the energy on a substrate is suppressed. Further, the laser beam energy that is incident on the lens is controlled in advance by combining the optical system changing the branching ratio of polarization of the laser beam and the optical system having dependence on direction of polarization of the laser beam and changed continuously according to the transmittance of the lens on which the laser beam is incident. The laser energy is controlled to offset the transmittance of the lens, and thereby energy fluctuation of the laser beam irradiation of a substrate can be prevented.

Game controllers having a communication link to a game systems, a processor, and a photoelectric plethysmography, a galvanometer, or a thermocouple. Video game systems having a video game processor, a computer readable medium containing executable instructions for providing a video game and the game controller.

The invention provides a galvanometer system correction device and a correction method thereof, and relates to the technical field of precision laser processing equipment. A honeycomb panel is arranged in the middle of the outer frame of a bearing platform, a base plate for corrective is absorbed on the honeycomb panel, and the vacuum chamber of the honeycomb panel is connected with a dust collector; a PSD sensor for measuring the actual output light spot center position of the laser of a galvanometer system is arranged on the vacuum absorption bearing platform; a CCD image acquisition device is arranged above the base plate for correcting, and then is provided with a light intensity regulating module and an image acquisition board card; and a visual measurement algorithm module is arranged. The invention can effectively inhibit the precision drift of the galvanometer system, improve the efficiency of the galvanometer system when in correction model updating and in real-time correction calculation operation, improve the automatic degree of equipment, reduce the labor intensity of an operator, greatly improve the processing precision of equipment, product quality and production efficiency, has simple structure and unique principle and method, and is particularly suitable for precision laser processing equipment to use.

A galvanometer mirror rotates in one direction when the galvanometer mirror is used. A spot can be scanned on an irradiated surface at a more constant speed by rotating the galvanometer mirror and by using the inertia. Moreover, it is preferable to make the galvanometer mirror heavy because the inertia becomes higher so that the spot is scanned at a more constant speed. In addition, in a polygon mirror of this invention, mirrors are arranged so as not to contact each other because a change time of the scanning position between the mirrors is provided. By moving the irradiated object with timing together when the laser light is not irradiated, the laser process can be performed efficiently.

The invention discloses a laser additive manufacturing method and a laser additive manufacturing device of metal parts. In the laser additive manufacturing method, a layered-manufactured profile-followed cylinder is used as a forming cylinder, namely before each metal part layer is manufactured, a layer of closed thin wall is manufactured, the formed cavity is used as the profile-followed cavity, the height of the profile-followed cavity is the same as that of the metal part layer to be manufactured, and the shape of the profile-followed cavity is adapted to that of the metal part layer to be manufactured, so as to provide a plane reference and a cavity for laying powder; the layered-manufactured profile-followed cylinder is used, a scanning galvanometer is used for performing selective laser melting and forming, the metal part layers are manufactured layer by layer, layers of the profile-followed cavities are finally stacked to form the profile-followed cylinder, and the layers of metal parts are stacked to form metal parts. The laser additive manufacturing device comprises a laser galvanometer melting and forming device and a thin wall preparation device which alternatively work, so as to accomplish the selective laser melting and forming process. The method and the device keep the advantages of the selective laser melting (SLM) metal additive manufacturing technology, uses the profile-followed cylinder to break the limit of the conventional SLM device fixed-size forming cylinder, and thus achieving the high-precision manufacture of the large-size even over-sized parts.

The invention discloses a method for overall calibration of a galvanometer type line laser scanning three-dimensional measuring system. First two lenses whose effective focal lengths are f1 and f2 are selected, and a camera is utilized to shoot a plane target and feature point coordinates are extracted, and main point coordinates of an image are calculated according to a varifocal method; then the lens whose focal length is f1 is used as a lens of the system, and for the feature point coordinates on the plane target which are obtained by the lens, intrinsic parameters and extrinsic parameters of the camera are calibrated; next, by changing galvanometer control voltage and driving a one-dimensional translation table to move, line laser stripes in different depth directions and different optical planes are obtained, and through operation of plane fitting and intersecting line obtaining, a transformation relation between a target coordinate system and a world coordinate system is obtained; and finally, coordinates under a system model are all unified to an image pixel coordinate system and the world coordinate system, thereby completing calibration of the whole system. The method has the advantages of simple calibration process, high calibration precision, fast calibration speed and the like.

A moving coil motor has an axisymmetric magnetic field applied to the drive coils on the movable member of the motor. The movable member is suspended by springs. The moving coil motor may be configured in a MEMS format, with the movable member and its suspension springs fabricated from a mono-crystalline substance to improve structural integrity. MEMS based moving coil motors may be configured in an array. Sensors are provided to detect the relative spatial positions of the movable member. The movable member may include several tiers. In one application, the moving coil motor may be configured to support and drive a mirror surface on the movable member to form a galvanometer, optical switch, or other optical component. Singular moving coil motors may be configured in an optical cavity to facilitate the tuning of specific wavelengths while a number of moving coil motors may be configured to form an array of optical switches to facilitate switching in a multi-channel optical network.

An optical image measuring device which can form a highly reliable image even if an object moves during scanning of a signal light is provided. An optical image forming device 1 comprises: an interferometer that splits a low coherence light L0 into a signal light LS and a reference light LR and generates an interference light LC by overlaying the signal light LS reflected by a fundus oculi with the reference light LR reflected by a reference mirror 14; a CCD 34 which receives the interference light LC and outputs a detection signal; Galvanometer mirrors 22 and 23 to scan the signal light LS in a main scanning direction and a sub-scanning direction; and a computer 40 forming tomographic images G1 to Gm along the main scanning direction at different positions of the sub-scanning direction. The Galvanometer mirrors 22 and 23 scan the signal light LS in a given direction crossing the main scanning direction, and the computer 40 forms a tomographic image for correction GR along the given direction to correct displacement of each topographic image Gi based on the tomographic image for correction GR.

The transmissivity of an ftheta lens which is used as a means for converging laser light differs in the center and in the edge thereof. As a result, when the ftheta lens is used as it is with the purpose of crystallizing by laser irradiation, energy distribution of the laser light which is irradiated on the semiconductor film is not uniform so that the whole surface of the semiconductor film could not be irradiated uniformly. Therefore, the present invention provides a laser irradiation apparatus including a galvanometer mirror and an ftheta lens that can offset the change of the energy due to the change of transmissivity of the ftheta lens and can scan the laser light while controlling the change of the energy on the object to be irradiated. Moreover, the invention provides a manufacturing method of a semiconductor device including the laser irradiation apparatus described above.

A rapid-sampling stochastic scanning multiphoton multifocal microscopy (SS-MMM) fluorescence imaging technique enables multiparticle tracking at rates upwards of 1,000 times greater than conventional single point raster scanning. Stochastic scanning of a diffractive optical element may generate a 10×10 hexagonal array of foci with a white noise driven galvanometer to yield a scan pattern that is random yet space-filling. SS-MMM may create a more uniformly sampled image with fewer spatio-temporal artifacts than obtained by conventional or multibeam raster scanning.

The invention discloses a device and method for laser remote removal of foreign matter on a transmission line. The device comprises a laser, a numerical control base, a light beam collimator, a visible indicating light unit, a scanning galvanometer, a distance measuring instrument, an electronic telescoping sighting device, a controller and an emitting barrel. By the adoption of the device and method, only one operator is needed, large-sized equipment or other auxiliary equipment is not needed, the operator does not have to climb a tower or a rope ladder, environment conditions such as the terrain and the line height do not needed to be considered, the device simply needs to be adjusted so as to be aligned to a target and emit lasers, the foreign matter can be removed or shot down within tens of seconds, the operator do not make any contact with facilities and equipment of the transmission line in the whole process, hot-line work can be conducted, the foreign matter on the transmission line can be remotely, rapidly and safely removed in time, and the application prospect is good.

The invention discloses a calibration method and device used for a laser processing system. The calibration method includes the steps that firstly, a lens in a galvanometer is controlled to be adjusted according to a calibration picture which is edited in advance, a laser device is driven, a laser beam generated by the laser device is made to penetrate through the galvanometer, and the calibration picture is etched on marking paper which is placed on a processing platform in advance; secondly, an image, photographed by a camera, of the processing platform is obtained, and the image includes the calibration picture; thirdly, distortion correction is conducted according to the image and the calibration picture etched on the marking paper, and the corresponding relation between an image coordinate system and a galvanometer coordinate system is obtained. According to the calibration method and device used for the laser processing system, distortion correction is achieved through the calibration picture on the marking paper, a target does not need to be used, cost is saved under the premise that precision is ensured, and the calibration operation is simplified.

The invention relates to a reflection-type confocal scanning retina imaging system based on adaptive optics, which can accurately obtain the high-resolution images of vital human eye retinae in real time and comprises a light source, a reflection-type beam shrinking and expanding system, a two-dimension scanning galvanometer, a Hartmann sensor, a deformable mirror, a photoelectric detection system, a data acquisition and processing system and a contraocular sighting target system. Lasers emitted from the light source are hit into human eye ground; light reflected from the eye ground returns along the original path, enters the photoelectric detection system and passes through the data acquisition and processing system to obtain the real-time images of the human eye ground. Simultaneously, an adaptive optics system comprising the Hartmann sensor and the deformable mirror can synchronously detect and correct human eye aberration, and thereby, the high resolution of the images is ensured.

The present disclosure disclosed an ultraviolet laser 3D printing method for the precise temperature control of polymer material and device thereof. The device comprises a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system and so on. The method comprises: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature. By means of the above device and method, precise temperature control of ultraviolet laser 3D printing prototyping for polymer materials can be realized.

The invention relates to a method for improving the laser scanning image light-curing quick-molding efficiency, and in particular relates to an imaging system capable of enabling liquid-state light-sensitive cured resin to be efficiently and quickly cured based on a multi-light-beam laser scanning technology. According to a specific implementation mode, light emitted by a laser light source (3) passes through a collimating lens (4), collimated laser light beams enter an optical fiber beam splitter (5), a beam of laser is split into 1*N light beam matrixes, the laser beams are reflected by scanning galvanometers (7 and 8) and are focused on a light-cured resin surface (10) by virtue of a field lens (9), a workpiece graph layer is efficiently scanned, and N workpieces can be finally, simultaneously and quickly molded. Therefore, the scanning efficiency is improved by N times correspondingly.

The utility model discloses a three-dimensional laser washing device. The three-dimensional laser washing device comprises a pulsed laser with indicating red light and a control system of the same pulsed laser, a beam spread collimation optical system, a two-dimensional optical scanning galvanometer and a controller of the same two-dimensional optical scanning galvanometer, a focusing position regulator and a displacement controller. The focusing position regulator consists of a focusing lens, a filter, a microscopic imaging lens, a CCD (Charge Coupled Device) and a processor, wherein the focusing lens is fixed with the microscopic imaging lens, the indicating red light of the pulsed laser reflects on the sample and images on the CCD (Charge Coupled Device), the microscopic imaging lens moves longitudinally to find a position where the contrast ratio is the highest and the image edge is the clearest, the position is a focus position of the focusing lens, and the three-dimensional laser washing device consists of the two-dimensional scanning galvanometer and the focusing lens. The three-dimensional laser washing device makes full use of the two-dimensional laser washing device which is based on the optical galvanometer scanning system, presetting the surface shape of the washing material is not required before cleaning, thereby having the advantages of being wide in application, simple in structure, good in stability, easy to debug, and the like.

The invention relates to a system and method for a line scan confocal ophthalmoscope. The system comprises a linear light beam generation module, a splitting module, a scanning module, an imaging module and an output module. A linear light beam is subject to one-dimensional space scanning by the line scan confocal ophthalmoscope to illuminate fundus oculi retina, simultaneously a linear detector is used for image non-scan light beams reflected from the fundus oculi retina, the system only uses one scanning galvanometer and one linear detector, and the number of active members is small; and simultaneously, a confocal slit is conjugated with the plane of the fundus oculi retina, thereby eliminating the influence of eliminate stray light of a non-retina plane on imaging quality and obtaining high resolution by using the confocal imaging principle. The invention has the advantages of simple structure, short light path, good stability and high imaging frame frequency, is easy for manufacture and suitable for adjustment, and is small and exquisite.

The invention discloses a laser processing method. The method includes the following steps that a laser device is started through a computer control system, so that the laser device emits laser beams; the light beams pass a small-hole diaphragm, so that the functions of mode selection and radius control over the laser beams are achieved; the laser beams passing the small-hole diaphragm are collimated and expanded through a lens set; the collimated and expanded laser beams are converted into Bessel beams through an axicon optical element; and the Bessel beams are emitted to the surface of a processed material through a galvanometer system. The invention further discloses a laser processing device. The position of a focus does not need to be determined during processing, and the laser processing method has the characteristics of being large in depth-diameter ratio, high in precision and the like. The implementation method is simple, an optical path is easy to adjust, and the laser processing method and device have good application prospects in the laser processing field.

A switch-type imaging fiber apparatus and a branch-type imaging fiber apparatus are provided. Light emitted from a laser light source is made incident on an opening of an IF (image fiber) guided by a GM (galvanometer), output from an optical system provided at a leading end portion of the IF, and applied to an observation target. The light reflected by the observation target is sent back to the IF, transformed into parallel light by an fθ objective lens, reflected by a dichroic mirror, made incident on an image pickup device (CCD) via an imaging lens, and can be observed on a monitor. The GM is controlled to switch to make the light incident on the opening of an arbitrary one of a plurality of IFs. Accordingly, observation can be performed by focusing the light solely on the arbitrary IF.

Laser lines at 635 nm or longer (ideally 647 nm) are preferred for red, giving energy-efficient, bright, rapid-motion images with rich, full film-comparable colors. Green and blue lines are used too—and cyan retained for best color mixing, an extra light-power boost, and aid in speckle suppression. Speckle is suppressed through beam-path displacement—by deflecting the beam during projection, thereby avoiding both absorption and diffusion of the beam while preserving pseudocollimation (noncrossing rays). The latter in turn is important to infinite sharpness. Path displacement is achieved by scanning the beam on the liquid-crystal valves (LCLVs), which also provides several enhancements—in energy efficiency, brightness, contrast, beam uniformity (by suppressing both laser-mode ripple and artifacts), and convenient beam-turning to transfer the beam between apparatus tiers. Preferably deflection is performed by a mirror mounted on a galvanometer or motor for rotary oscillation; images are written incrementally on successive portions of the LCLV control stage (either optical or electronic) while the laser “reading beam” is synchronized on the output stage. The beam is shaped, with very little energy loss to masking, into a shallow cross-section which is shifted on the viewing screen as well as the LCLVs. Beam-splitter/analyzer cubes are preferred over polarizing sheets. Spatial modulation provided by an LCLV and maintained by pseudocollimation enables imaging on irregular projection media with portions at distinctly differing distances from the projector—including domes, sculptures, monuments, buildings; waterfalls, sprays, fog, clouds, ice; scrims and other stage structures; trees and other foliage; land and rock surfaces; and even assemblages of living creatures including people.

The invention discloses a variable-field scanning microscopic method based on a fixed optical path system, and a device thereof. At first, a beam expanding system is used for uniformly expanding laser beams which are transmitted from a laser so as to form uniform laser beams; then a two-dimensional space discrete system is used for the two-dimensional space discretization of the uniform laser beams so as to form a sub-beam of M multiplied by N; the sub-beam of M multiplied by N orderly passes through a collimating lens, a scanning galvanometer, a reflector, a dichroic mirror and a fluorescence microscope, and then focuses on the sample on a sample platform; thus the excited fluorescence can be formed on the sample; the fluorescence microscope is used for collecting the excited fluorescence, which is transmitted into an imaging system after being reflected by the dichroic mirror and focused by a focusing lens. The scanning of the galvanometer and the crossing movement of the sample platform are combined: the scanning step length and the scanning step number of the galvanometer are changed; the area of the unit viewing field is used as the step length to move the sample platform; thus the scanned viewing field can be changed. The scanning microscopic method realizes the flexible switching between the low-resolution large viewing field and the high-resolution small viewing field, and satisfies the requirements in different biomedical applications.

The invention provides a laser cleaning system for a rubber module, and the laser cleaning system comprises a laser cleaning head and a laser control system, wherein the laser cleaning head comprises a laser device and a beam expander, a scanning galvanometer is arranged in the output light direction of the beam expander, a focusing lens is arranged on the reflecting light path of the scanning galvanometer, and the light path output end of the focusing lens is used for cleaning articles; the laser device comprises a total reflector, an acousto-optic Q-switch, a semiconductor pumping module and an output mirror which are sequentially arranged on the light path; and the light-emitting switch of the laser device, the Q-switching drive module of the acousto-optic Q-switch, the power supply of the semiconductor pumping module, and the drive unit of the scanning galvanometer are controlled by a laser control system respectively. According to the invention, the semiconductor pumping solid pulse laser device is adopted and integrated on a cleaning machining head, the output power of laser is increased by means of acousto-optic Q-switching, and the coupling loss caused by optical fibre transmission is avoided, so that portable-type machining in a handheld mode or a manipulator clamping mode can be realized, and efficient cleaning for the rubber module can be finished.

A method of accomplishing high-throughput laser processing of workpiece features arranged in a densely spaced pattern minimizes workpiece feature processing inaccuracy and quality degradation that result from dynamic and thermal loads on laser beam positioning and optical components directing the laser beam during workpiece feature processing. A preferred embodiment is implemented with a laser beam positioning system composed of a zero-inertia optical deflector of an acousto-optic beam deflector (AOD) or an electro-optical deflector (EOD) type, a galvanometer head, and a linear stage cooperating to position the laser beam among the workpiece features.

The invention relates to a device for removing laser paint and an application method thereof. The device comprises a laser generator, a supporting platform seat, a moving platform, an overturning mechanism, an automatic camera positioning system, an industrial control computer, a laser power supply and a two-dimensional galvanometer scanning system. The invention is characterized in that the moving platform is provided with a station overturning mechanism, and the side surface of the moving platform is provided with the automatic camera positioning system; a cross beam of the supporting platform seat is provided with an X-Y axis galvanometer scanning unit and a laser generator; and the industrial control computer is respectively connected with the laser generator, the X-Y axis galvanometer scanning unit and an overturning platform controller (PLC) by cables. The invention has compact structure, automatic and accurate positioning, high working efficiency and the like, and can be widely applied in the fields of removing the paint of a semi-finished product of a solid electronic component. The invention relates to the application method for removing laser paint, which adopts an overturning and position-switching mechanism to realize the removing of a paint layer of pins of the electronic component.

A mobile galvanometer selective laser melting (SLM) forming device comprises a numerical-control system which is connected with an X-axis linear motor with a transverse lead rail group and a Y-axis linear motor with a longitudinal lead rail group through a communication circuit, the X-axis linear motor and the Y-axis linear motor form a scanning drive structure, the scanning drive structure is connected with a laser expanding collimation lens group in a drive way, a galvanometer unit is clamped into the bottom of the laser expanding collimation lens group, a forming working assembly is arranged below the galvanometer unit, and an inert gas curtain is arranged between the forming working assembly and the galvanometer unit. Due to the adoption of the mobile galvanometer SLM forming device, the defects that spots are formed on the edge of a forming area, the forming precision is poor and the size of a formed piece is easy to increase can be avoided.

The invention discloses a device and method for 3D-printing part model reverse-calculating through layer-by-layer detecting and defect positioning. The device comprises a scanning galvanometer, a half transparent and half reflecting mirror, an optical filter, a laser head, a high-speed camera, a controller and the like. The scanning galvanometer is used for controlling a laser beam to melt metal powder selectively, and molten pool radiation is reflected into the high-speed camera by the half transparent and half reflecting mirror and transformed into pictorial information to be transmitted to the controller. According to the device and method for 3D-printing part model reverse-calculating through layer-by-layer detecting and defect positioning, the device conducts monitoring on powder melting in the SLM machining process in an aiming mode, and feeds back to a computer software interface, molten pool characteristics of different positions are reflected in real time, the outline of each molten layer is measured accurately, and a part model is obtained through a reverse-calculating mode; and comparing and analyzing are conducted on the model and an original three-dimensional model, errors between a metal 3D printed part and original model data at the aspects of precision and dimension is obtained; the positions and the three-dimensional shapes of internal defects in the 3D printing process can be acquired precisely, and a destructive test aiming at the part in the later period of part printing is avoided.

A high efficiency, low cost, nondispersive optical multiplexing arrangement for optical beams, used a technique denominated “Reverse Laser Scanning.” In the Reverse Laser Scanning operation, different laser beams angularly meet on the rotational axis of a galvanometer-mounted mirror or the like. Upon reflection from the mirror, each of the laser beams is propagated along one defined direction by appropriate angular positioning of the galvanometer mirror. The process enables several useful deployments, including multi-chemical detection using several lasers in the same sensor, remotely operated laser switching for medical surgery and diagnosis where multiple lasers may be used, and wavelength, code, and time division multiplexing in communication systems, among others.

The invention provides a method for washing an aluminum alloy oxidation film to be welded via laser, relates to an efficient, high-quality, environmentally-friendly and stable washing process and solves the problems such as multiple processes, low efficiency, surface scratch damage, low stability and environmental pollution and the like of the chemical and mechanical washing methods at present. The method comprises the following steps: a position setting step, wherein a laser galvanometer head is capable of emitting a laser beam with nanoscale short pulse, an included angle alpha is formed between an optical axis of the laser beam and a surface to be washed at an intersection point, and alpha is greater than or equal to 30 degrees and less than or equal to 60 degrees; enabling a compressed air nozzle to point at the intersection point, forming an included angle beta between the compressed air nozzle and the surface to be washed, wherein beta is greater than or equal to 10 degrees and less than or equal to 20 degrees; enabling a suction nozzle of a dust sucking system to point at the intersection point, and forming an included angle gamma between the suction nozzle and the surface to be washed; a power setting step of setting average power and washing rate of the laser beam according to the thickness of an oxidization film with the surface to be washed; and a washing step of washing the surface to be washed via laser at the average power and the washing rate.

The invention discloses a calibration method of a laser galvanometer processing system under the guidance of binocular stereoscopic vision. The calibration method comprises the following steps: predetermining a laser galvanometer processing pattern containing a plurality of two-dimensional mark points; acquiring dense space mark points in different depths in a depth-of-field of the laser galvanometer processing system through laser marking by adopting the laser galvanometer processing pattern; measuring by a binocular vision sensor to obtain three-dimensional coordinates of each space mark point; acquiring a transfer matrix representing a mapping relation between the binocular vision sensor and the laser galvanometer processing system according to the correspondence relation between coordinates of the corresponding two-dimensional mark point on the laser galvanometer processing pattern and the three-dimensional coordinates of the corresponding space mark point. According to the calibration method disclosed by the invention, the robust mapping relation between the binocular vision sensor and the laser galvanometer processing system can be effectively established, and the vision feedback processing precision is improved. The calibration method is convenient to operate and high in stability.

The invention relates to the field of laser processing, in particular to a laser splitting galvanometer scanning and processing device comprising a beam control module, a laser splitting module, and a galvanometer scanning and focusing module. The laser splitting module is capable of processing a single laser beam into multiple laser beams, and the galvanometer scanning and focusing module is capable of switching laser focuses at high speed; by combining the two modules, high-speed efficient precision array laser processing is achieved; beam motion track control contents in laser processing can be further enriched by adding the beam control module, and the needs of various processing environments and various conditions are met. Compared to traditional laser processing, the laser splitting galvanometer scanning and processing device has the advantages that all aspects such as processing precision, processing efficiency and processing quality are greatly improved, the device adapts to the development trend of modern solid-state lasers and the device is widely applicable to the field of laser processing.