47 results about "Infrared laser beam" patented technology

The invention relates to the technical field of laser welding, in particular to a 6-series aluminum alloy welding method and device with a magnetic field cooperating with time-sharing double-beam scanning, and the method comprises the steps that in the welding process, a blue light laser beam is used for scanning along a to-be-welded path in a spiral path, and a micro molten pool array is formed; after the blue laser beam stops scanning, a near-infrared laser beam concentric with a light spot of the blue laser beam is emitted at a preset time interval, and welding is conducted along a linear path deviating from the center line of the micro-molten pool array by a preset deviation amount; and during emission of the near-infrared laser beam, a constant magnetic field perpendicular to the welding surface is applied to the welding surface. The welding stability and the joint consistency of the 6-series aluminum alloy are improved, and the welding effect is effectively improved.

The invention provides a recovery method of a silicon-based gallium nitride wafer, and relates to the technical field of semiconductor manufacturing, the recovery method aims at the silicon-based gallium nitride wafer comprising a silicon substrate and a gallium nitride-based epitaxial layer arranged on the silicon substrate, and the recovery method comprises the following steps: using an infrared laser beam to scan the silicon-based gallium nitride wafer through a preset laser scanning path strategy; incident light enters the silicon-based gallium nitride wafer from one side of the gallium nitride-based epitaxial layer, so that the gallium nitride-based epitaxial layer is separated from the silicon substrate; and stripping the gallium nitride-based epitaxial layer. And by utilizing the characteristic difference that the gallium nitride-based epitaxial layer is transparent to infrared laser and the silicon substrate strongly absorbs the infrared laser, laser energy accurately acts on the interface of the gallium nitride-based epitaxial layer and the silicon substrate, so that high-efficiency and low-damage separation is realized. The defects that a traditional etching technology is high in cost and heavy in pollution and the substrate is prone to being damaged are overcome, and a brand-new and effective technical path is provided for low-cost and green recovery of the silicon substrate.

Device (102) and method for detecting a pupil, wherein a scanning area is scanned line by line with an infrared laser beam (108), wherein brightnesses of reflections (110) of the infrared laser beam (108) are detected line by line, wherein the brightest reflections in particular are determined, the brightness of which exceeds a predetermined threshold, wherein a Voroni diagram (200) is determined line by line depending on the brightnesses detected line by line, wherein the brightest reflections in particular, the brightness of which exceeds the predetermined threshold, form the origin centers of Voroni cells in the Voroni diagram, and the pupil is detected depending on the positions of the Voroni cells in the Voroni diagram, the device (102) comprising data glasses (100).

The invention relates to a method for preparing a metal powder intended for an additive manufacturing process of the type involving the scanning of a powder bed by a near-infrared laser beam, characterized in that it comprises: an initial step for selecting a powder having an optical reflectance higher than 70% for wavelengths ranging between 800 nm and 1500 nm; then a step for treating said powder, which is different from particle grafting, and which causes a physical and / or chemical surface modification of the particles (4) of said powder, such that it is possible to reduce their optical reflectance at a given wavelength. The invention also relates to the use of such a powder, the particles (4) having a median size d50 between 5 pm and 50 pm after treatment.

A laser-assisted bonding method includes: placing a semiconductor chip on a substrate, the semiconductor chip having an anti-reflection layer for infrared light on a front surface thereof, and a solder bump formed between the substrate and the semiconductor chip; and irradiating an infrared laser beam to the semiconductor chip through the anti-reflection layer to reflow the solder bump by heat generated by energy of the infrared laser beam absorbed by the semiconductor chip, in which the anti-reflection layer is used to reduce reflection of the infrared laser beam by the semiconductor chip.

The application discloses a laser-electrolysis-ultrasonic in-situ composite super-precision cutting device for black metal, which comprises a workpiece, a diamond tool head, a tool handle, an ultrasonic vibration unit, a focused infrared laser beam and a metal layer. In the machining process, an electrochemical reaction occurs at the cutting position of the workpiece to generate an oxidation layer with soft and loose quality and weak carbon affinity, thereby avoiding direct contact between the diamond and the black metal matrix material and reducing chemical wear caused by iron-carbon affinity. The application simultaneously introduces inert high-pressure airflow and electrolyte droplet jet flow for continuous heat dissipation and cooling of the machining area, so that the machining process temperature is reduced. On this basis, the focused infrared laser beam introduced in the machining process can accelerate the electrochemical reaction and increase the thickness of the oxidation layer, thereby being beneficial to efficient and low-temperature cutting. The ultrasonic vibration introduced in the machining process can further utilize the ultrasonic cavitation effect to accelerate material removal and removal. Through the ingenious in-situ composite of the laser, the ultrasonic and the electrolysis electric field, high-quality, efficient, super-precision and low-loss machining of the black metal complex component is realized.

This invention relates to the field of laser welding technology, and in particular to a 6-series aluminum alloy welding method and apparatus using magnetic field-coordinated, time-sharing dual-beam scanning. The method comprises: during the welding process, a blue laser beam is used to scan a spiral path along the path to be welded, forming an array of micro-molten pools; after the blue laser beam stops scanning, a preset interval is set, and a near-infrared laser beam concentric with the blue laser beam spot is emitted, welding along a linear path offset by a preset amount from the center line of the micro-molten pool array; during the emission of the near-infrared laser beam, a constant magnetic field perpendicular to the weld surface is applied to the weld surface. This method improves the welding stability and joint consistency of 6-series aluminum alloys, effectively enhancing the welding effect.

A laser apparatus for generating a sub- 190 nanometer laser beam includes a deep-ultraviolet solid-state laser source to generate an initial deep-ultraviolet laser beam, at least one mid-infrared solid-state laser source to generate at least one respective mid-infrared laser beam, and at least one lithium triborate crystal to generate an output deep-ultraviolet laser beam from the initial deep-ultraviolet and mid-infrared laser beams via sum-frequency generation. Each mid-infrared solid- state laser source includes (a) a holmium-, thulium-, or chromium-doped gain crystal or gain fiber or (b) an optically-pumped semiconductor gain material to generate the respective mid-infrared laser beam. The laser apparatus may be configured for continuous-wave and pulsed operation, thus offering versatile solutions for applications requiring DUV laser radiation below 190 nanometers. Advantageously, the present approach relies on lithium triborate. Lithium triborate crystals can be grown with the quality and dimensions needed for industrial applications.

The application discloses an infrared laser beam quality measuring device and method, and the infrared laser beam quality measuring method directly or focuses the infrared laser on an infrared up-conversion thick film material, converts the infrared laser spot which cannot be detected by a CMOS / CCD camera into a spot which can be detected by the CMOS / CCD camera, collects the spot on the infrared up-conversion thick film material by using the CMOS / CCD camera, quantitatively analyzes various parameters of the spot, and realizes quantitative measurement and evaluation of the infrared laser beam quality. The application converts the infrared laser spot which cannot be detected by the CMOS / CCD camera into the spot which can be detected by the CMOS / CCD camera, collects the spot by using the CMOS / CCD camera, realizes low-cost and reliable laser spot imaging, realizes measurement of the beam quality of the infrared laser which cannot be detected by the CMOS / CCD camera, and is easy to be widely popularized in industrial applications; furthermore, the reliability of the measurement is further improved, and the measurement efficiency is improved.

The invention relates to a laser correlation detector which comprises a transmitting end, a receiving end and a mobile terminal. The transmitting end comprises a transmitting module, a first control unit, a first communication module, a first Bluetooth module and a two-dimensional adjusting table; the transmitting module is used for transmitting infrared laser beams, the first control unit is in communication connection with a mobile terminal through the first Bluetooth module, the first control unit is in communication connection with the receiving end through the first communication module, and the two-dimensional adjusting table is used for adjusting the transmitting angle of the transmitting module. And the angle parameter is transmitted to the first control module. According to the invention, the data of the transmitting end and the receiving end are acquired in real time through the mobile terminal, cooperative operation of multiple persons is not needed, debugging personnel can independently complete the focusing process, and manpower and time are greatly saved.

The invention relates to a pupil detection method, in particular for data glasses (10), comprising at least one scanning step (30), in which a laser beam (12), in particular an infrared laser beam, in particular by means of a MEMS micromirror system (16), of at least one laser feedback interferometry (LFI) sensor (14) is scanned over at least a majority of a visible part of a user's eye (18); and at least one detection step (32) in which a portion (20) of the laser beam (12) backscattered by the user's eye (18) is detected by the LFI sensor (14) and converted into an electrical signal. According to the invention, in at least one recording step (34), in order to detect a pupil (22) of a user's eye (18), signal shifts (24, 50, 52), in particular above a settable threshold value, in the electrical signals are recorded together with scanning coordinates (alpha, beta), in particular of the MEMS micromirror system (16), associated with the respective signal shift (24).

The invention provides a stainless steel powder laser printing method which comprises the following steps: laying a stainless steel powder layer with the thickness of 0.05-0.07 mm on a substrate in a forming cavity, controlling an infrared laser beam to selectively scan according to a preset scanning strategy in an inert gas protection atmosphere according to three-dimensional model slicing data, so that the powder layer is molten and solidified to form a cladding layer, and repeating the steps until the three-dimensional component is obtained. The scanning strategy comprises the following steps: (1) the laser power is 200-250W, the scanning interval is 0.08-0.11 mm, and the scanning speed is 700-900mm / s; (2) the laser power ranges from 250 W to 300 W, the scanning distance ranges from 0.08 mm to 0.11 mm, and the scanning speed ranges from 900 mm / s to 1100 mm / s; and (3) the laser power is 300-400 W, the scanning distance is 0.07-0.09 mm, and the scanning speed is 800-1000 mm / s. In addition, the invention further provides a stainless steel three-dimensional component and a heat treatment method thereof.

The utility model discloses a de-bonding device. The de-bonding device comprises a laser source for providing an infrared laser beam for performing de-bonding through a carrier silicon wafer; the galvanometer is used for transmitting the infrared laser to the first surface of the carrier silicon wafer and irradiating a bonding layer through the carrier silicon wafer, and the galvanometer is used for de-bonding the carrier silicon wafer and a device according to a target scanning speed by adjusting the laser frequency, the device is bonded on the second surface of the carrier silicon wafer through the device, and the laser spot generated by the next pulse corresponding to the target scanning speed is next to the laser spot generated by the previous pulse and is not overlapped with the laser spot generated by the previous pulse. Through the above debonding device, nondestructive debonding can be carried out on the permanently bonded silicon wafer, so that the separated silicon wafer can be reused, subsequent processing is facilitated, the efficiency of debonding permanent bonding can be improved, and the size of the whole debonding device is reduced.

The present invention provides a ballistic imaging method and system based on infrared laser. The system comprises: an infrared laser emitting module, a receiving module and a host computer. The infrared laser emitting module comprises a power supply, an infrared laser beam array, a scattering mirror, a collimating mirror and a housing. The receiving module comprises a bandpass filter, a photodiode array, an outer frame and a data interface. In this system, the infrared laser beam array emits multiple infrared laser beams. Through the action of the scattering mirror and the collimating mirror, the multiple independent infrared laser beams form an infrared laser column that can completely cover the photodiode array. The bandpass filter on the receiving module can transmit light waves with wavelengths within the infrared light range. The photodiode array receives infrared signals to form a path, and the host computer records the power supply status of each photodiode on the photodiode array.

An apparatus for non-contact measuring temperature includes a stand, for securing a vapor chamber, wherein the vapor chamber comprises a condenser area and an evaporator area, wherein the evaporator area comprises a heating spot; a continuous-wave laser device, facing the stand, for irradiating the heating spot by providing an infrared laser beam, wherein the infrared laser beam comprises a first infrared wavelength range; a switch device, controlling an irradiating cycle of the infrared laser beam, wherein the irradiating cycle comprises a irradiating time-interval and a non-irradiating time-interval; a first infrared sensor, facing the stand, for collecting a first thermal radiation data of the heating spot in a second infrared wavelength range; a data processing unit, only transferring the first thermal radiation data in the non-irradiating time-interval into a first temperature, wherein the irradiating time-interval is longer than the non-irradiating time-interval.

The utility model discloses an infrared laser induction video pile structure, which relates to the technical field of parking lot management equipment and comprises two vertical rods. The two vertical rods are located on the left rear side and the right rear side of the parking space correspondingly. A camera unit is arranged on one vertical rod and is used for collecting an image of one parking space; the two vertical rods are each provided with an infrared laser recognition unit. The infrared laser recognition unit is electrically connected with the camera shooting unit; one infrared laser identification unit corresponds to one infrared laser beam; during working, one end of the infrared laser beam extends to the infrared laser recognition unit, and the other end of the infrared laser beam extends to the front side surface of the parking space. The projections of the two infrared laser beams on the ground form an X-like shape. Compared with the prior art, the video pile structure provided by the utility model can effectively reduce the monitoring power consumption of the video pile and reduce the misjudgment rate of parking space vehicle identification.

The invention relates to a copper and stainless steel composite laser welding process and device and application of the copper and stainless steel composite laser welding process and device. The copper and stainless steel composite laser welding process comprises the steps that after the end faces of a to-be-welded copper part and a to-be-welded stainless steel part are attached and assembled to form an abutted seam, a red-blue composite welding head forms a red-blue composite laser beam through an infrared laser beam and a blue laser beam; firstly, red and blue composite laser beams are used for carrying out pre-laser welding on one or more positions of an abutted seam path, the pre-laser welding comprises spot welding and / or segmented welding, and then the red and blue composite laser beams are used for carrying out laser welding along the abutted seam path to form a welding seam. During pre-laser welding and laser welding, a light spot formed by an infrared laser beam is controlled to swing, the swing center is located on an abutted seam path, and the center of a blue light spot of a blue light laser beam is controlled to deviate to one side, outside the abutted seam path, of the copper part; filling materials such as welding wires and welding rods are not needed, the welding efficiency and quality of copper pieces and stainless steel pieces with the thickness smaller than or equal to 3 mm can be effectively improved, the production cost is remarkably reduced, and a technical path is provided for large-scale mass production of copper and stainless steel vapor chambers and the like.

The invention relates to a double-beam laser nitriding device and method for alloy steel. The double-beam laser nitriding device comprises an integration box, an optical system and an airflow auxiliary system. A movable platform is mounted in the integration box, a heating disc is mounted on the movable platform, and a to-be-nitrided alloy steel substrate is placed on a heater; the optical system comprises a far-infrared laser, a near-infrared laser and a galvanometer, a far-infrared laser beam enters the integration box and is parallel to the surface of the alloy steel substrate to be nitrided, ammonia gas is induced to be subjected to photochemical dissociation to generate nitrogen atoms, and the near-infrared laser beam enters the integration box through the galvanometer and irradiates the surface of the alloy steel substrate to be nitrided, so that the surface temperature of the alloy steel is increased; the ammonia gas is assisted to generate nitrogen atoms on the surface of the alloy steel through photo-thermal dissociation, and the surface nitridation efficiency of the alloy steel substrate is improved through the combined action of the two lasers; the airflow auxiliary system comprises an air pump and a vacuum pump. According to the double-beam laser nitriding method adopted by the invention, the gas nitriding speed of the alloy steel can be greatly increased at a lower environment temperature, and the nitriding efficiency is improved while the nitriding quality is controlled.

To provide a mobile body control system capable of stably performing position estimation of a mobile body.SOLUTION: A processing device of a drone 2 references moving route area position coordinate information, and the drone 2 moves within a moving route area 51 corresponding to the moving route area position coordinate information. Shortly after the drone 2 departs, a distance between the drone 2 and a first fixed base station 31 is calculated on the basis of LPWA radio waves from the first fixed base station 31, and a direction from the drone 2 to the first fixed base station 31 is identified on the basis of an infrared laser beam from the first fixed base station 31. On the basis of the distance, the direction, and position coordinate information of the first fixed base station 31, current position coordinate information of the drone 2 is estimated. The current position coordinate information is compared with the moving route area position coordinate information. If they are determined not to match, control is performed to move the drone 2 from a first current location 55 toward a destination 53 while approaching the moving route area 51.SELECTED DRAWING: Figure 2

The invention provides a laser printing method for copper alloy powder. The laser printing method comprises the steps that (a) a copper alloy powder layer with the thickness ranging from 0.05 mm to 0.07 mm is laid on a base plate in a forming cavity or a previous solidification layer; (b) under the protection atmosphere of inert gas, according to preset three-dimensional model slice data, infrared laser beams are controlled to selectively scan and irradiate the copper alloy powder layer according to a preset scanning strategy, the power of the infrared laser is 500-800 W, the scanning speed is 600-900 mm / s, and the scanning interval is selected from 0.07-0.10 mm; (c) completely melting and solidifying the copper alloy powder in the scanned area to form a cladding layer; (d) repeating the steps (a) to (c), and printing layer by layer until the three-dimensional component is completed; wherein in the step (b), the infrared laser power is 500 to 600 W, and the scanning interval is 0.08 to 0.10 mm; or the power of the infrared laser is 700 to 800 W, and the scanning distance is 0.07 to 0.09 mm. In addition, the invention further provides a three-dimensional component and a heat treatment method thereof.

The invention discloses an unmanned aerial vehicle landing guiding device, and relates to the field of unmanned aerial vehicles. Comprising a laser transmitter; the beam expanding system is at least partially arranged above the transmitting end of the laser transmitter; the light splitting system is arranged above the beam expanding system and comprises a plurality of light splitting units which are uniformly arranged along the circumferential direction; the emission window assembly comprises a plurality of first scattering mirrors which at least partially correspond to the light splitting unit and allow laser to pass through. According to the invention, the field of view of the infrared laser beams is spliced, and the signal dead angle is small; a reflective system is used as a collimated beam expansion system, the structure is simple, and the weight is light.

This utility model provides a rapid installation and positioning device for elevator guide rails, relating to the field of elevator guide rail installation technology. It includes a workbench, several laser emitting modules, a laser receiving module, and an infrared transmitter. The laser emitting modules are installed around the bottom of the elevator shaft and positioned close to the elevator guide rail installation location. Mounting seats are fixedly installed on both sides of the workbench's upper surface near the elevator guide rail. The spacing is adjusted by moving two sliders within a horizontal frame at the top, and the sliders are moved by rollers until they abut against the inner wall of the elevator shaft, thus fixing the workbench inside the shaft and preventing it from shaking. The laser emitting and receiving modules are used in combination to quickly adjust the position of the infrared transmitter. The infrared laser beam generated by the transmitter is positioned to fit against the surface of the elevator guide rail, facilitating rapid positioning during installation.

Device and method for detecting scattered light, in particular for determining the position of a pupil (4) of an eye (2), especially for data glasses, comprising: scanning a deflecting device (104) with a laser beam (106) emitted in a variable direction of emission (108), in particular an infrared laser beam, a laser beam source (102) in at least one dimension, in particular in two dimensions;Deflecting the laser beam (106) by means of the deflecting device (104), wherein the laser beam (106) is deflected depending on the emission direction (108) and / or depending on at least one wavelength of the laser beam (106) such that the eye (2) is illuminated from a virtual first point (110) or a virtual second point (112), wherein the virtual first point (110) has a first focal length (f1) and the virtual second point (112) has a second focal length (f2), wherein the first focal length (f1) and the second focal length (f2) are different relative to the eye (2); detecting scattered light (120) of the eye (2) of the deflected laser beam (106) by means of a detection device (118), in particular a photodiode.

The invention discloses an assembly and method for adjusting a composite common-aperture optical system. The assembly comprises a collimator, a laser transmitter, a beam splitter prism, a first pyramid, a light spot quality analyzer, the composite common-aperture optical system and a second pyramid. The composite common-aperture optical system comprises a primary mirror, a secondary mirror, a beam shrinking mirror, a first enoscope and a second enoscope, the first enoscope is located on a parallel or convergent light path after beam shrinking, and the second enoscope is located on a reflection light path of the first enoscope; the second pyramid is located on a reflection light path of the second enoscope. According to the assembly, the optical axis of the near-infrared band laser beam is consistent with the main optical axis of the collimator. The light spot quality analyzer is adopted to collect reference light spot position information in real time, real-time data feedback is achieved, high-precision automatic adjustment is achieved through the first enoscope and the second enoscope, and finally the target of double-optical-axis high-precision common-reference installation and adjustment of the composite common-aperture optical system is achieved.

The invention relates to an eye tracking device (30, 30a, 30b), with an LFI sensor unit (12) which is configured to emit an infrared laser beam (14) and to record reflection signals (16, 36) of the infrared laser beam (14) and to provide measurement signals for evaluating eye positions and / or eye distances of an eye (18) arranged in the beam path of the infrared laser beam (14), and with an optical unit (20), at least comprising a beam splitter optic (22) which is configured to split and deflect the emitted infrared laser beam (14) into two or more partial beams (24, 26) before it strikes the eye (18) such that each of the partial beams (24, 26) of the infrared laser beam (14) strikes the eye (18) at a different location. It is proposed that the optical unit (20) comprises an LC unit (32) with an LC cell (34) which is provided for interaction with one of the partial beams (24, 26), and wherein the LC cell (34) can be controlled in such a way that the LC cell (34) selectively allows or prevents interference of the respective partial beam (24, 26) with its backscattered reflection signal (16, 36) in the LFI sensor unit (12) by appropriately influencing a polarization of the respective partial beam (24, 26).

Method (500), in particular for operating data glasses (400), comprising the following steps: scanning (504) an eye (2) with a laser beam (20a, 22a) generated by means of a lighting device (100), for example an infrared laser beam, in particular a modulated infrared laser beam, in at least one dimension, wherein, depending on at least one emission angle (α), a point (20c, 22c) on a surface of the eye (2) is illuminated with the laser beam (20a, 22a), in particular in two dimensions, wherein, depending on a first emission angle (α) and a second emission angle (β), a point (20c, 22c) on a surface of the eye (2) is illuminated with the laser beam (20a, 22a); a detection (506) of the illuminated point (20c, 22c) on the eye (2) by means of an event camera (200); a determination (508) of a receiving position (20e, 22e) of the detected point (20c, 22c) on the event camera (200);a determination (510) of a distance value (z) of the illuminated point (20c, 22c) which characterizes a distance (z) between the surface of the eye (2) and an optically effective arrangement comprising the lighting device (100) and the event camera (200), depending on the at least one beam angle (α), the receiving position (20e, 22e) and a geometry of the optically effective arrangement, in particular by means of triangulation depending on a base distance (B) between the lighting device (100) and the event camera (200) specified by the geometry.;

The present invention provides a light-controlled nitric oxide delivery platform and its preparation method and application, belonging to the field of optical nanomaterial technology. The nitric oxide donor microparticles provided by the present invention are self-assembled by components including energy ring nanoparticles, nitric oxide donor small molecules and amphiphilic polymers. The present invention uses Tm 3+ Doped NaYF4 nanoparticles, as energy ring nanoparticles, have a high refractive index (1.46), much higher than the refractive index of the dispersed system under use, making them easily captured by a near-infrared laser beam, enabling optical manipulation of the near-infrared laser beam. The light-controlled nitric oxide delivery platform provided by the present invention uses a near-infrared laser beam as a trigger to capture and manipulate the movement of nitric oxide donor particles, while simultaneously stimulating their release of nitric oxide. This platform has the advantage of spatiotemporally controllable nitric oxide delivery and can effectively isolate diseased cells, thereby achieving precise treatment of cardiovascular diseases such as thrombosis.

The invention relates to a method (500), in particular for operating smartglasses (400), comprising the following steps: scanning (504) an eye (2) with a laser beam (20a, 22a), for example an infrared laser beam, in particular a modulated infrared laser beam, generated by means of an illumination device (100), in at least one dimension, wherein, depending on at least one emission angle (α), a point (20c, 22c) on a surface of the eye (2) is illuminated by the laser beam (20a, 22a), in particular in two dimensions, wherein, depending on a first emission angle (α) and a second emission angle (β), a point (20c, 22c) on a surface of the eye (2) is illuminated by the laser beam (20a, 22a); detecting (506) the illuminated point (20c, 22c) on the eye (2) by means of an event camera (200); determining (508) a receiving position (20e, 22e) for the detected point (20c, 22c) at the event camera (200); determining (510) a distance value (z) of the illuminated point (20c, 22c) which characterizes a distance (z) between the surface of the eye (2) and an optically effective arrangement comprising the illumination device (100) and the event camera (200), depending on the at least one emission angle (α), the receiving position (20e, 22e) and a geometry of the optically effective arrangement, in particular by means of triangulation depending on a base distance (B) between the illumination device (100) and the event camera (200) specified by the geometry.

The present invention discloses a wearable, flexible, near-infrared, transparent ultrasonic transducer and its preparation method. The transducer comprises a PDMS flexible substrate, multiple rigid micro-CMUT elements, serpentine silver nanowire electrodes, and electrodes for external connections. The multiple rigid micro-CMUT elements are arranged in parallel and interconnected via the silver nanowire electrodes to form a serpentine interconnection circuit. The micro-CMUT elements, serpentine silver nanowire electrodes, and electrodes for external connections are encapsulated within the PDMS flexible substrate. The wearable, flexible, near-infrared, transparent ultrasonic transducer allows near-infrared laser beams to penetrate, effectively integrating the light source and ultrasonic transducer.

The invention belongs to the technical field of quantum cascade semiconductor lasers, and discloses a quantum cascade semiconductor laser single light spot focusing space beam combining system which comprises a space beam combining crystal, a longitudinal light beam unit and a multi-path transverse light beam unit. The space beam combining crystal is in a polygon frustum shape, the lower bottom face of the space beam combining crystal serves as an incident face, the upper bottom face serves as an emergent face, and the side face serves as a reflecting face. The longitudinal light beam unit is coaxially arranged on one side of the incident surface, and the multiple transverse light beam units are arranged on one side of the reflecting surface in a one-to-one correspondence manner; a mid-infrared laser beam emitted by the longitudinal beam unit passes through the beam combining crystal, is emitted from the emergent surface, and is focused behind the beam combining crystal; the mid-infrared laser beams emitted by the multi-path transverse beam unit are reflected by the reflecting surface, and after the transmission direction is changed, the mid-infrared laser beams are focused at the same position where the longitudinal laser beams are focused. The system stability can be improved, and the overall light spot size is small; the focusing light spot surface type can be effectively improved, and the symmetry is improved.