60 results about "Laser beams" patented technology

In an optical component where fixation of resin welding is performed by emitting a laser beam to screwing parts of an inner lens barrel and an outer lens barrel after focus adjustment, the laser beam is emitted to melt and cure a joint of the screwing part of the inner lens barrel and the screwing part of the outer lens barrel by 0.5 mm to 3.0 mm in a direction parallel to a direction of protrusion of the inner lens barrel relative to the outer lens barrel, so that welding and fixation are completed.

A vertical cavity surface emitting laser (VCSEL) device with improved power and beam characteristics. The VCSEL device contains one VCSEL or an array of VCSELs. Each VCSEL has a corresponding integrated microlens, and a heat sink is attached to the device side of the VCSEL device. The heat sink allows improved heat dissipation, and therefore provides improved power characteristics of the VCSEL device output laser beam. The microlens or microlens array allows easier and more compact focussing of the VCSEL device output laser beam. The VCSEL device can be used in a variety of optical systems, and its improved power and focusing characteristics provide a compact, low power, low cost laser system.

Provided are a method of fabricating a light-emitting apparatus with improved light extraction efficiency and a light-emitting apparatus fabricated using the method. The method includes: preparing a monocrystalline substrate; forming an intermediate structure on the substrate, the intermediate structure comprising a light-emitting structure which comprises a first conductive pattern of a first conductivity type, a light-emitting pattern, and a second conductive pattern of a second conductivity type stacked sequentially, a first electrode which is electrically connected to the first conductive pattern, and a second electrode which is electrically connected to the second conductive pattern; forming a polycrystalline region, which extends in a horizontal direction, by irradiating a laser beam to the substrate in the horizontal direction such that the laser beam is focused on a beam-focusing point within the substrate; and cutting the substrate in the horizontal direction along the polycrystalline region.

The invention discloses a flexible laser cleaning system applicable to a bend pipeline. The system comprises a laser device, a crawling device and a control system. The crawling device comprises a front shell, a rear shell and a laser cleaning head. The front shell is provided with a driving motor, front driving wheels and a laser access port. The rear shell is provided with a cleaning motor and rear driven wheels. The cleaning motor is connected with the laser cleaning head. The front shell and the rear shell are connected flexibly through a spring sleeve. Energy transmitting fiber is furtherarranged in the spring sleeve. Laser beams emitted by the laser device are transmitted to the energy transmitting fiber through the laser access port and then transmitted to the laser cleaning head through the energy transmitting fiber, and accordingly, the inner wall of the pipeline is cleaned. The control system is connected with the laser device, the driving motor and the cleaning motor. According to the laser cleaning system, the front shell and the rear shell are flexibly connected by adopting the flexible spring sleeve and can adapt to the bent pipeline automatically, so that the bend pipeline cleaning quality and efficiency are improved.

The invention is to a device and method, for cutting a can blank in which case an end section of the can blank is severed. The can blank is moved by means of a conveyor arrangement at a constant speed about a first axis of rotation. Preferably, a laser beam is used as the cutting means. A deflecting arrangement deflects the laser beam to a focal point where the side surface of the can blank is located. Due the rotation of the can blank about its longitudinal axis, the axial end section of said can blank is severed. The focal point of the laser beam does not change relative to the longitudinal axis of the can blank during the laser cutting operation.

Method for examining bone in vivo, comprises obtaining a laser beam; modulating the laser beam to insert therein photoacoustic frequencies including optical frequencies and acoustic frequencies, the acoustic frequencies being able to give rise to acoustic waves; directing the modulated beam at a bone to cause acoustic waves resulting from the beam to travel through the bone; analyzing received signals from the bone including signals resulting from the acoustic waves, to determine a mineral density and a bone quality for said bone, and thus obtain in-vivo data that can be of assistance to a doctor when diagnosing osteoporosis.

The invention relates to a car steel-aluminum splicing joint welding method. The car steel-aluminum splicing joint welding method is characterized by comprising the following steps that a first workpiece and a second workpiece required to be subject to splicing welding are provided; secondly, the first workpiece and the second workpiece are vertically spliced and clamped; thirdly, a laser cuttingsystem is provided; fourthly, a laser molten brazing welding system is provided, and a laser welding head, a wire feeding head and a laser cutting head in the laser molten brazing welding system are arranged in series and column in the welding direction; fifthly, the laser cutting system is started, and high-energy laser beams formed through focusing of the laser cutting head irradiate the surfaceof the first workpiece vertically; sixthly, the laser molten brazing welding system is started, the laser welding head and the wire feeding head are subject to molten brazing welding along the trackof the laser cutting head, and welding process is finished. The invention further discloses a car steel-aluminum splicing joint welding system. Compared with the prior art, the method and system havethe beneficial effects of being good in welding effect and simple in process.

The emission intensity of a laser beam source, at a time when a laser beam emitted from the laser beam source and scanned by an optical scanning device becomes incident to a laser beam detector provided in a predetermined position on the scanning path of the laser beam in order to hold a position of an electrostatic latent image formed on a photoreceptor constant in the main scanning direction, while at the same time, changing the emission intensity of the laser beam, is set so as to become the consistently same emission intensity regardless of a change in emission intensity at the time of electrostatic latent image formation onto a photoreceptor. This allows the detection timing of a laser beam by a laser beam detector to be kept constant.

The invention discloses a device and method for detecting the optical detector working point of a particle detector. The device comprises a laser, an external modulation device, a cylindrical lens group, a sample cell, a focusing lens and an optical detector which are distributed according to preset positions, wherein the external modulation device is used to generate a detection signal and load the detection signal on the laser beam sent by the laser; and the device also comprises an oscilloscope and a processing circuit, wherein the optical detector is connected with the oscilloscope and the processing circuit through signal wires respectively to display the detection signal from the external modulation device on the oscilloscope and process the detection signal in the processing circuit. By using the device and method of the invention, the optical detector can work in a linear work area and the particle detection can be performed more accurately.

The invention discloses a two unidirectional rotating mirrors based method for realizing uniform laser cleaning. The method includes the following steps: a laser beam enters to a rotating reflector B; the reflected beam of the reflector B forms an elliptical spot on a reflector C; the elliptical spot forms an elliptical scanning strip with a certain width after being reflected by the rotating reflector C; and the elliptical scanning strip can realize the surface cleaning on a pollution surface under the moving of a manual or mechanical arm. A two unidirectional rotating mirrors based device for realizing uniform laser cleaning is also provided. The device includes the reflector B and the reflector C; the reflector B and the reflector C are respectively driven to rotate through rotating shafts of a motor A and a motor B; and the reflector B and the reflector C are respectively in certain included angle arrangement with the rotating shafts of the motors. Therefore, the uniform scanning of light beams can be realized, cleaning efficiency and cleaning effects can be greatly enhanced, and material substrates can be prevented from being damaged during cleaning; and the performance requirements and scanning reflector requirements of the motors can be reduced.

The invention discloses a pump-probe method based on Z-scan. A laser beam is divided into two beams; pumping light is focused on samples to be measured through time delay, so that a non-linear sample generates nonlinear absorption and nonlinear refraction; emergent probe light is divided into two beams through a spectroscope, wherein one beam directly enters a first probe, and the other beam enters a second probe after passing through a diaphragm of small pore diameter with a center coinciding with an optic axis. The pump-probe method is characterized in that phase objects are arranged in the front of a convex lens in a probe light path; the method for measuring the light comprises the following steps: (1) the samples to be measured are put in place, and the energy of the probe light at different times is collected by two probes respectively; (2) a energy curve of the probe light at different delay times is processed, so as to obtain optical nonlinear parameters. A measuring system working according to the method has the advantages that the light path is simple; the data treatment is simple; nonlinear absorption and refraction can be measured simultaneously without the need of separate measurement, and the size and the symbol of the nonlinear refraction can be measured simultaneously; the measuring results are accurate, etc.

The invention discloses template laser cutting equipment provided with a template fixture. The template laser cutting equipment comprises a cutting mechanism and the template fixture, wherein the cutting mechanism comprises a laser head; the laser head makes two-dimensional movement through an X-direction slideway and Y-direction slideways; and the template fixture is positioned between two rack plates of the cutting mechanism and is positioned below the laser head; a worm gear in the template fixture, through driving a threaded rod, drives a first chassis to descend with a locking block, and drives a second chassis to rise with a fixed disk. In this way, a workpiece on the fixed disk is clamped up and down by the fixed disk and the locking block, and the cutting of a template is completed by a laser beam. The template laser cutting equipment is high in speed and efficiency, and cuts smoothly, easily and neatly.

Method for determining the position coordinates (X_M, YM, ZM) of a target object (11) in a measurement range (12) in at least two dimensions (X, Y, Z), with the steps: a target device (13) with a reflector element (31) is positioned at the target object (11), a laser beam (46) is transmitted from a transmitting element (41) of a laser distance measurement device (14) onto the target device (13), at least a part of the laser beam (46) is partially reflected on the reflector element (31), a camera device (15) records an image of the target device (13) with the at least partially reflected laser beam as a light reflection, the focus of the light reflection in the image of the target device (13) is determined, a receiver element in the laser distance measuring device (14) receives the laser beam partially reflected on the reflector element (31) as the received beam, a distance to the target object (11) is calculated from the received beam, a first offset is calculated from a focal length of the camera device (15), the calculated distance to the target object (11) and a first image coordinate of the focus of the light reflection, the position coordinates (XM, YM, ZM) of the target object (11) are calculated from the distance and the first offset.

To prevent poor quality of weld in a welding process for a thick material or for welding a gap, the laser welding apparatus has granular flux (3) supplied to a side of the base material (W) opposite to the side where a laser beam is directed and a pressing member (5) that presses the granular flux onto the base material (W) upon receiving fluid therein. Either the flux prevents the laser beam that coming through the base material (W) from penetrating the flux or the thickness of molten flux is selected so that the laser beam coming through the base material (W) does not penetrate the molten flux.

The embodiment of the invention discloses a welding line positioning method for positioning the butt joint position between welding workpieces. The welding line positioning method comprises the stepsthat an industrial camera receives structured light reflected through laser beam irradiation at the butt joint position, and an image is formed; the image is processed, and a structured light stripe framework composed of single pixels is obtained; according to the structured light stripe framework, feature points of the butt joint position area are extracted from the image, and coordinates of thebutt joint position in the image are obtained; and deflection amount calculation is conducted on the butt joint position coordinates in the image, and the actual coordinates of the butt joint positionare obtained. Through the above manner and the implementing manner, the problem that in the prior art, positioning of the butt joint position of the middle of a folded welding workpiece is inaccurateis solved; and through the positioning method, the positioning precision is improved, the later welding operation is facilitated, and the welding quality is improved.

A light spot indication robot and a light spot indication method thereof are arranged. The light spot indication robot comprises a robot body which is arranged with a control module, a camera module and a laser indication module (100), wherein the laser indication module (100) emits a laser beam, the imaging module shoots to-be-indicated objects to form an image plane, the laser beam and the to-be-indicated object are projected onto the image plane to form a laser spot projection position and to-be-indicated object projection positions, respectively. The light spot indication robot is also arranged with a signal input module. According to content shown on the image plane of the to-be-indicated objects shot by the imaging module and input information of the signal input module, a target object among the to-be-indicated objects is determined. The control module controls the laser indication module to move, so as to cause the laser spot projection position to coincide with a projection position of the target object in the image plane. The present invention converts the location in a three-dimensional space into the location in a two-dimensional space, and has a small computation amount and a quick and accurate position indication.

A noncontact laser ray measuring method for internal threads includes: acquiring image information of a to-be-measured internal thread according to a laser triangulation method, using a controller for postprocessing to calculate various parameters of the internal thread, and judging whether a to-be-tested part (2) is qualified or not according to the various parameters of the internal thread to finally finish the whole test process. The process of acquiring the image information of the to-be-measured internal thread according to the laser triangulation method sequentially includes: using a laser (1) to emit laser beams to a selected tested portion of the to-be-tested part (2); after the laser beams are reflected at the tested portion, using a reflector (3) to transmit the reflected beams to an optical enlargement system (4); processing optical signals by an area array CCD (charge coupled device) imaging system (5), and transmitting the signals to the controller (7) for postprocessing. The noncontact laser ray measuring method for the internal threads has the advantages of high dynamic measurement resolution, high universality and high predictable economic values and social values.

The present invention provides an immunomodulator for use in the treatment and/or control of a neoplastic disease in a patient intended to undergo immunogenic cell death therapy simultaneously, separately or sequentially with administration of the immunomodulator. The therapy can be selected from microwave irradiation, targeted radiotherapy, embolization, cryotherapy, ultrasound, high intensity focused ultrasound, cyberknife, hyperthermia, radiofrequency ablation, cryoablation, electrotome heating, hot water injection, alcohol injection, embolization, radiation exposure, photodynamic therapy, laser beam irradiation, and combinations thereof.

A liquid discharge head includes a liquid discharge substrate including a discharge port for discharging liquid, and a flow path member including a transparent member that is transparent to a laser beam, an absorption member capable of absorbing a laser beam, and a flow path for supplying liquid to the liquid discharge substrate, wherein the flow path is formed between the transparent member and the absorption member by emitting a laser beam toward a flow path portion of the absorption member constituting a portion of a wall of the flow path and toward a periphery of the flow path portion through the transparent member and thereby welding the transparent member and the absorption member at the periphery of the flow path portion, and wherein the flow path portion includes an inclined surface inclined with respect to a direction of the laser beam that has passed through the transparent member.