52 results about "Tophat beam" patented technology

The invention is suitable for the technical field of laser processing, and provides laser processing equipment. The laser processing equipment comprises a laser device used for emitting a laser beam; the light path switching system is used for deflecting the laser beam to a flat-topped light path or a Gaussian light path, the laser beam is output in a flat-topped light beam mode through the flat-topped light path, and the laser beam is output in a Gaussian light beam mode through the Gaussian light path; the processing head is used for deflecting the emergent direction of the flat-topped light beam output by the flat-topped light path or the Gaussian light beam output by the Gaussian light path and guiding the flat-topped light beam or the Gaussian light beam to a preset processing position; and the controller is coupled to the light path switching system through communication and is used for controlling the light path switching system to switch the laser beam between the flat-topped light path and the Gaussian light path according to processing requirements. In the embodiment of the invention, the laser processing equipment can be quickly switched among the laser beams in different modes, so that the processing efficiency can be improved.

The invention relates to the technical field of optical fiber device manufacturing, and discloses a femtosecond laser inscribing low-polarization-dependent-loss optical fiber grating method and system, and the method comprises the steps: firstly, synthesizing an initial phase comprising a flat-topped beam phase, an astigmatism correction phase and a defocus phase, and loading the initial phase to a spatial light phase modulator; therefore, a preset circular flat-top focusing light spot is generated. Secondly, collecting a three-dimensional light field image sequence of a focusing light spot in a low-power detection mode, reconstructing light intensity distribution, extracting effective focal depth and ovality characteristic parameters, dynamically optimizing a phase through a closed-loop feedback mechanism until light field characteristics reach a preset target, and obtaining an optimized phase; and finally, loading an optimized phase in a high-power inscribing mode, and controlling the axial scanning of the optical fiber to inscribe the grating. Accurate active regulation and control of the three-dimensional shape of the focused light field and closed-loop self-optimization of process parameters are realized, birefringence caused by anisotropy of a refractive index modulation area is inhibited from a physical mechanism, and polarization dependent loss of the fiber bragg grating is fundamentally reduced.

The invention relates to a dynamic light beam shaping system and method based on a spatial light modulator. The system comprises a laser light source module, a beam expanding collimation light path, a light beam modulator, a focusing optical assembly, a detection and feedback module and a control and optimization module. According to the method, the uniformity of the output flat-topped beam can be corrected by virtue of a random parallel gradient descent (SPGD) algorithm and combining a Zernike polynomial as a control variable. Meanwhile, a composite performance index comprehensively considering energy distribution and shape features is constructed, the correction process of the flat-topped beam is accelerated by adopting a mode of gradually improving Zernike polynomial orders in multiple stages, the convergence trend of the performance index is used as a judgment basis of stage switching, stage independent variable dimension expansion is implemented, and the correction precision of the flat-topped beam is improved. And the convergence speed is obviously improved. Besides, adaptive selection of disturbance amplitude and learning rate parameters in the SPGD algorithm is realized by using noise estimation and a local linearity index, and the robustness of the system to noise and environmental disturbance is enhanced.

The invention discloses a double-flat-topped light beam diamond polishing device and method based on homogenized optical fibers, and relates to the technical field of semiconductor material laser processing. The light spot homogenizing unit homogenizes the pulse laser to obtain a square flat-topped light spot; the light spot shaping unit collimates the homogenized pulse laser into parallel light and adjusts the beam diameter; the beam splitting and sub-transfer unit splits the parallel light into two sub-light beams, the two sub-light beams are adjusted to be coplanar and parallel to each other, and the center-to-center distance between the two sub-light beams is adjustable; the laser processing head unit focuses the two sub-light beams on the surface of the diamond; and the three-dimensional motion platform is used for bearing the diamond and scanning and polishing the diamond. Multi-focus array parallel scanning increases the coverage area of single-time processing, the processing effect of traditional single-focus multi-time scanning can be achieved through one-time scanning, the scanning frequency is remarkably reduced, the processing time consumption is reduced, and the processing efficiency is improved.

The invention discloses a laser illumination and imaging lens group for a shadow imaging system, the laser illumination and imaging lens group comprises an illumination lens and an imaging lens, the illumination lens shapes a Gaussian beam into a flat-topped beam, and the flat-topped beam uniformly irradiates an object to be observed; the imaging lens images the target area to obtain a shadow contour image of the observed object. The illumination lens comprises a first lens with negative focal power and a second lens with positive focal power, and the first lens and the second lens are both aspheric lenses. The imaging lens comprises a front lens group, an aperture diaphragm and a rear lens group, the front lens group comprises a third lens, a fourth lens, a seventh lens and an eighth lens with positive focal power, and a fifth lens and a sixth lens with negative focal power, and the rear lens group comprises a ninth lens with negative focal power and a tenth lens with positive focal power. And all the lenses are spherical lenses. While the collimation and dodging effects of the laser beams are ensured, the system also has the advantages of long working distance, high resolution and the like, can meet the observation requirements of a non-luminous high-speed small-size moving object, and expands the application field of a shadow imaging system.

The invention discloses shaping laser annealing equipment and method for a silicon-based heterojunction cell, and the equipment comprises a laser, a light path and a quick connection assembly, the output end of the laser is fixedly connected with the light path, and the light path is fixedly connected with a beam expander. The diffraction optical element can be taken out during later maintenance, and maintenance is simple and convenient; during machining, the light path is adjusted, laser emitted by the laser can pass through the center of the diffraction optical element reflector, the diffraction optical element in the light path enables machining plane light spots to be distributed in a flat-topped light beam energy mode, the flat-topped light beam energy is concentrated, energy loss is reduced, ablation damage caused by too high local energy is avoided, and machining precision is improved. The resistivity is generally reduced after processing, optimal processing parameters exist, the resistivity is reduced by about 25% on the basis that the substrate and the transparent conductive film layer are not damaged by the shaping laser annealing process, and the processing efficiency and the annealing quality of the heterojunction cell are effectively improved.

The invention relates to the field of atomic interference measurement, in particular to an atomic Raman interferometer based on a flat-topped beam. Comprising two Raman interference subsystems arranged in parallel, each of the two Raman interference subsystems comprises an ultrahigh vacuum cavity and a light path system, and the light path system comprises a flat-topped beam shaping module located on one side of the high vacuum cavity and a Raman light Doppler sensitive configuration module located on the other side of the high vacuum cavity; in the flat-topped beam shaping module, the holographic algorithm principle is adopted, the actual size of atoms in an interference area is combined to determine the size of a target flat-topped beam, the initial complex amplitude is precisely constrained, and a final diffraction phase is obtained through iterative optimization. After the Raman light passes through the diffraction phase, the Raman light is shaped into a flat-topped light beam with a target size and uniform intensity distribution at the ultrahigh vacuum cavity, so that the coherence efficiency under the same interference time is remarkably improved.

The invention relates to a laser beam shaping system. The laser beam shaping system comprises a laser light source used for generating an initial light beam; the aspherical lens group is arranged on a propagation path of the laser beam and comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from the object space to the image space along the incident direction of the light source; wherein the first lens and the second lens are plano-concave aspheric lenses and both have negative focal lengths; the third lens is a biconcave aspheric lens and has a negative focal length; the fourth lens is a biconvex aspheric lens and has a positive focal length; the initial light beam is collimated by the lens group to form a target flat-topped light beam, and meanwhile, the aperture of the light beam realizes beam expansion of a preset multiplying power.

The invention provides an optical device and a laser. The optical device comprises a first light splitting module, N light beam shaping modules and N second light splitting modules, n is a natural number greater than or equal to 2; the first light splitting module receives an input light beam and splits the input light beam into N Gaussian light beams in a time domain; the light beam shaping modules are arranged on the light emitting side of the first light splitting module, correspond to the Gaussian light beams one to one and convert the Gaussian light beams output by the first light splitting module into flat-topped light beams; the second light splitting modules are arranged on the light emitting side of the light beam shaping module, correspond to the flat-topped light beams in a one-to-one mode and divide the flat-topped light beams into at least two beams of output light in the spatial domain. According to the optical device and the laser, the high-energy requirement and the high-repetition-rate requirement of precision machining are met, and the productivity is greatly improved; the light beams segmented in time can be independently controlled, and the flexibility is greatly improved.

The application discloses a method for generating a flat-top beam array, comprising the following steps: introducing a multi-Gaussian function and a hyperbolic function, superimposing the hyperbolic function, constructing a weight function and a kernel function with Gaussian distribution intensity based on the superimposed hyperbolic function and the multi-Gaussian function; introducing a partial coherent light construction formula, combining the weight function and the kernel function to obtain a cross-spectral density function of a multi-cosine multi-Gaussian correlation light field containing a multi-cosine function at a source plane; introducing a free space transmission formula, constructing an intensity expression of the multi-cosine multi-Gaussian correlation light field at an arbitrary transmission distance according to the cross-spectral density function of the multi-cosine multi-Gaussian correlation light field, that is, an expression of the multi-cosine multi-Gaussian correlation light field; adjusting the transmission distance and the parameters of the multi-cosine multi-Gaussian correlation light field to obtain a flat-top beam array with different numbers of rows and columns, and realizing an array form with adjustable flat-top sub-beams; and the application can effectively control the number of the flat-top beam array sub-beams.

The invention discloses a femtosecond laser operation flat-topped beam shaping optical system which comprises a laser, a beam expander, a DOE shaping module and a focusing scanning module. The laser is used for outputting a femtosecond Gaussian laser beam, and the femtosecond Gaussian laser beam sequentially passes through the beam expander, the DOE shaping module and the focusing scanning module and then acts on an operation area; the beam expander is used for expanding the diameter of the femtosecond Gaussian laser beam to the beam diameter used for cutting the light path; the DOE shaping module comprises a DOE diffractive optical element; the DOE diffractive optical element is arranged on a path of the femtosecond Gaussian laser beam and is used for converting an incident Gaussian beam into a flat-topped beam with uniformly distributed energy through phase modulation; the flat-topped light beam has no local energy peak value, thermal damage and excessive ionization of traditional Gaussian laser to normal tissues of eyes are avoided, postoperative inflammatory response is light, the tissue recovery speed is increased, and the risk of operative complications is reduced.

In one aspect, the present teachings provide a system for performing cytometry that can be operated in three operational modes. In one operational mode, a fluorescence image of a sample is obtained by exciting one or more fluorophore(s) present in the sample by an excitation beam formed as a superposition of a top-hat-shaped beam with a plurality of beams that are radiofrequency shifted relative to one another. In another operational mode, a sample can be illuminated successively over a time interval by a laser beam at a plurality of excitation frequencies in a scanning fashion. In yet another operational mode, the system can be operated to illuminate a plurality of locations of a sample concurrently by a single excitation frequency, which can be generated, e.g., by shifting the central frequency of a laser beam by a radiofrequency. The detected fluorescence radiation can be used to analyze the fluorescence content of the sample, e.g., a cell / particle.

The invention provides an optical system for reducing optical noise, which is used in the field of laser gas analyzers, and comprises a doublet collimating lens, the doublet collimating lens is arranged on an emission light path of an infrared laser light source, the doublet collimating lens is used for shaping a laser beam emitted by the infrared laser light source, and the doublet collimating lens is used for outputting the shaped laser beam. And the obtained laser collimated light beam is a nearly flat-topped light beam with uniform energy, is freely propagated in the space and is received by a receiving end. According to the invention, a single-piece doublet lens is used as a core optical element, the free light laser beam of TO packaging is shaped to realize laser beam homogenization and collimation, the introduction of intensity noise caused by non-uniform light intensity distribution of the light beam after long-distance light beam transmission is reduced, and the optical interference noise frequency is increased in combination with the long-focal-length light path design, so that the optical interference efficiency is improved. The influence of optical interference noise is reduced through a filtering algorithm. And the structure is compact, the installation and adjustment are simple and convenient, the environmental adaptability is strong, and the application effect of the laser gas analyzer in the gas detection field is realized.

The invention provides a trace element LIBS dynamic monitoring device and method based on a flat-topped beam, and belongs to the technical field of laser beam shaping and laser-induced breakdown spectroscopy, and the trace element LIBS dynamic monitoring device comprises a laser emission unit used for generating a pulse-type Gaussian distribution laser beam; the light beam shaping and focusing unit is composed of an aspherical lens group based on a Galileo structure, and is used for shaping the incident Gaussian distribution laser beam into a flat-topped light beam with uniformly distributed energy on an image plane, and focusing the flat-topped light beam into a light spot; the sample chamber is used for containing a lubricating oil sample to be detected; the spectral signal acquisition unit is used for collecting and transmitting spectral signals generated by plasma radiation; and the control and data processing unit is used for processing data and controlling dynamic monitoring. According to the invention, the Gaussian beam is shaped into the flat-topped beam through the aspheric lens group and is focused, so that the stability and quantitative precision of LIBS (Laser-induced Breakdown Spectroscopy) detection are improved.

This invention discloses an apparatus and method for achieving a high-contrast CPT resonance signal. The apparatus includes a coherent light source generation module, a beam quality optimization module, a beam parameter optimization module, an atomic gas cell module, an optical detection and acquisition module, a laser frequency stabilization module, and a signal generator. The coherent light source generation module generates coherent two-color light with an energy distribution satisfying a Gaussian distribution. The beam quality optimization module converts the Gaussian beam into a flat-top beam. The beam parameter optimization module optimizes the parameters of the flat-top beam. The atomic gas cell module enables the beam to interact with atoms, obtaining an atomic superposition absorption spectrum. The optical detection and acquisition module detects the optical signal and converts it into an electrical signal. The laser frequency stabilization module locks the laser frequency to the lowest point of the atomic superposition absorption spectrum. The signal generator linearly scans the radio frequency signal, causing the frequency difference of the coherent two-color light to change linearly, outputting a high-contrast CPT resonance signal. This invention can effectively improve the contrast of the CPT resonance signal.

The invention relates to a spectrum detection device and method based on a multi-focus hollow focusing spot, and the method comprises the steps: enabling a laser beam emitted by a laser to be converted into a flat-topped beam through a beam shaper, and enabling the flat-topped beam to enter a first polarization modulation module through a first beam splitter prism, and converting the flat-topped beam into linearly polarized light; the linearly polarized light enters the spatial light modulator to be modulated into linearly polarized light with a vortex phase, and the linearly polarized light returns along the original path and is reflected by the first beam splitter prism, and then enters the second polarization modulation module to be converted into circularly polarized light with a vortex phase; circularly polarized light passes through the fly eye lens to form multi-focus hollow light spots which are distributed in a ring shape, passes through the focusing lens to form multi-focus hollow focusing light spots which are distributed in a ring shape and act on a plurality of to-be-detected object samples corresponding to the multi-focus hollow focusing light spots in position, various Raman scattering light is correspondingly generated, spectrum analysis is carried out on the Raman scattering light, and the Raman scattering light is analyzed to obtain the Raman spectrum of the to-be-detected object samples. And obtaining various types of spectral information. According to the invention, multi-focus parallel signal detection and acquisition are realized, and compared with a traditional single-point system, the analysis flux is greatly improved.

The application provides an optical structure, comprising two optical windows spaced from each other, and an air film formed between the two optical windows; the optical structure can convert an incident Gaussian beam into a flat-top beam; wherein the optical structure satisfies the following relationship: T*F*k*d*sinθ i =n0sinθ t ; wherein T is the transmittance of the air film, F is the Fresnel coefficient, k is the wave number, δ is the phase difference generated after the Gaussian beam is alternately reflected once in the air film, R is the reflectivity of the interfaces between the air film and the two optical windows, d is the thickness of the air film, n0 is the refractive index of the air film, θ t is the refraction angle of the Gaussian beam in the air film, n is the refractive index of the optical window, and θ i is the incident angle of the Gaussian beam when the Gaussian beam is incident from the optical window into the air film. The application also provides an exposure device.

The present application belongs to the technical field of metal additive manufacturing and solidification structure regulation, and particularly relates to a laser powder bed fusion forming method of a directional columnar grain structure alloy. The present application adopts a flat-top beam or a point-ring beam as a forming laser beam, inputs a single-channel three-dimensional transient heat transfer solidification model, obtains a molten pool width, a molten pool depth, a temperature gradient, a solidification rate and a columnar grain-equiaxed grain transition determination result, screens laser power and scanning speed according to the molten pool morphology with a width-depth ratio W / D>3; sets a scanning interval according to the deviation area of the molten pool side temperature gradient vector relative to the preset columnar grain growth direction, so that the overlapping area of adjacent melt channels covers different orientation dendrites or grains on the side; sets the powder layer thickness according to the sensitive area of the columnar grain-equiaxed grain transition at different heights, so that the remelting of the subsequent layer molten pool eliminates the mixed crystals, equiaxed crystals or non-target oriented grains on the top of the previous layer molten pool, and a columnar grain structure metal alloy component is obtained through continuous directional growth across the melt channel and across the layer.

The application discloses a high spatial resolution array type SERF atomic magnetometer based on beam homogenization, which provides a new idea for the realization of miniaturized multi-channel atomic magnetometer, and lays a foundation for the development of high spatial resolution magnetic field detection, portable multi-channel atomic magnetometer and biological magnetic imaging technology, and is characterized in that: an alkali metal cell is arranged in a magnetic compensation coil; a 3*3 photodiode array is arranged on a laser exit side of the alkali metal cell; a 1 / 4 wave plate is connected with a flat-top beam shaper on a laser incident side of the alkali metal cell; the flat-top beam shaper shapes a light spot with Gaussian distribution of incident light intensity into a flat-top light spot with uniform distribution of light intensity; the flat-top light spot covers the photodiode array on an xy plane after sequentially passing through the 1 / 4 wave plate and the alkali metal cell along a z axis; and nine photodiodes in the photodiode array form nine signal channels for receiving the flat-top light spot from nine positions.

The invention provides a three-dimensional scanner, and the scanner comprises a structured light module unit which comprises at least one or more structured light modules, and the structured light modules are used for transmitting structured light; the shaping optical device is movably arranged on the light emitting side of at least one structured light module or fixedly arranged on the light emitting sides of part of the structured light modules in the multiple structured light modules, and the shaping optical device is used for shaping the structured light from the structured light module unit into a flat-topped light beam and emitting the flat-topped light beam to a measured object. According to the three-dimensional scanner, an active light supplementing device does not need to be additionally arranged, the overall structure of the three-dimensional scanner is greatly simplified, the problem that the appearance of the three-dimensional scanner is bloated is effectively avoided, and meanwhile the shaping optical device can reduce fault points, reduce control complexity, improve system stability and prolong the service life of the whole scanner; the structured light module is high in lighting effect, high-brightness uniform lighting can be achieved by matching with a flat-topped light beam formed by a shaping optical device, the utilization rate of the lighting effect is improved, and the multi-scene requirements of a conventional scanning mode and a deep hole flash measurement function are met.

This invention relates to a laser cladding apparatus and method. The laser cladding apparatus includes a laser emitter, a cladding nozzle system, a powder feeding system, and a lens optical path system. The laser emitter is a CO2 laser emitter emitting a Gaussian beam. The cladding nozzle system includes a cooling water circulation pipe, a focusing mirror, a nozzle body, a protective mirror, and the nozzle itself. The powder feeding system is bi-pronged in shape, including two powder inlets and one powder outlet, with powder delivered via gas. The lens optical path system includes a support, a collimating mirror, a triangular conversion mirror, a flat-top beam shaping mirror, a circular beam shaping mirror, and a rectangular beam shaping mirror. This invention achieves beam type and beam shape conversion through the triangular conversion mirror and the shaping mirror, thereby adapting to different workpieces and improving work efficiency. The cooling water circulation pipe within the cladding nozzle system cools the focusing mirror, extending the lifespan of the apparatus.

The embodiment of the invention provides a diamond surface planarization system and method.The system comprises a laser system assembly, a machining platform assembly and a numerical control module, specifically, the laser system assembly is used for forming a long-strip-shaped flat-topped light beam by means of modulation of a spatial light modulator and improving the light gathering capacity by combining a high numerical aperture (NA) objective lens; the focal depth is reduced; the machining platform assembly is used for driving the to-be-machined diamond to do reciprocating motion in the X-axis direction and the Y-axis direction according to the shape of the long-strip-shaped light spot formed through modulation in the machining process, so that the initial highest point of the surface of the diamond is gradually smoothed; the numerical control module is used for calculating a target displacement amount needing to be fed downwards when monitoring that the initial highest point is flattened, and sending an operation regulation and control instruction for immediately adjusting the target displacement amount to the laser system assembly; and when the laser system assembly obtains the operation regulation and control instruction, the laser system assembly vertically moves downwards according to the target displacement amount, so that the laser beam is focused on the highest point on the new machining surface again.

The invention provides a control method of a laser detection system. The laser detection system comprises a condensation objective lens, an imaging module, a regulation and control module, a laser, a beam splitter, a plurality of phase shifters and a QBH array. The laser is used for generating laser beams; the beam splitter is used for splitting a laser beam into a plurality of sub-laser beams, and the condensing objective lens is used for forming a flat-topped light beam; the imaging module is used for sampling the flat-topped light beam; the regulation and control module is used for regulating and controlling the phase shifter and / or the QBH array according to an imaging result of the imaging module; the method comprises the steps that whether the similarity between an imaging result and a preset target result reaches a threshold value or not is judged; if not, random disturbance is applied to a system performance evaluation function in the stochastic gradient descent algorithm, control parameters of the multiple phase shifters and / or QBHs are updated, and whether the similarity between the imaging result and a preset target result reaches a threshold value or not is judged. According to the invention, the wafer-level defect detection precision can be improved.

This invention discloses a dual-flat-top beam diamond polishing device and method based on homogenized optical fiber, relating to the field of semiconductor material laser processing technology. The device includes: a laser generator producing pulsed laser light; a spot homogenization unit homogenizing the pulsed laser light to obtain a square flat-top beam; a spot shaping unit collimating the homogenized pulsed laser light into parallel light and adjusting the beam diameter; a beam splitting and sub-transfer unit splitting the parallel light into two sub-beams, adjusting the two sub-beams to be coplanar and parallel, and making the center distance between the two sub-beams adjustable; a laser processing head unit focusing the two beams onto the diamond surface; and a three-dimensional motion platform carrying the diamond and completing the scanning and polishing of the diamond. The multi-focus array parallel scanning increases the coverage area of ​​a single processing pass, achieving the processing effect of multiple scans using a traditional single-focus array in a single scan, significantly reducing the number of scans, lowering processing time, and improving processing efficiency.

The invention discloses a liquid guide laser electrolysis combined machining light path system and device, and belongs to the technical field of laser machining. The system comprises a laser, a beam shaping unit, a beam shrinking lens group and a coupling unit which are sequentially arranged along a light path, the beam shaping unit is used for shaping Gaussian beams emitted by the laser into flat-topped beams with uniform energy distribution; the beam shrinking lens group shrinks the flat-topped light beam to obtain a collimated light beam with the diameter smaller than that of the electrolyte jet flow; and the coupling unit is used for coupling the collimated light beam with the cylindrical electrolyte sprayed out of the nozzle hole to form a coupling energy beam to act on the to-be-processed workpiece. The laser energy space distribution in the jet flow is uniform and stable, the machining quality is good and stable, and the machining precision and efficiency are improved.

The application provides a laser processing method based on scanning path control energy distribution, and relates to the technical field of laser processing, and specifically comprises the following steps: the method reconstructs a real-time hole shape containing a circumferential deviation by establishing an ideal hole shape model and layer-by-layer processing and acquiring a three-dimensional point cloud of a hole wall in real time; a radius deviation field and a taper deviation field are calculated according to the three-dimensional point cloud, a spiral eccentric scanning path is dynamically generated, and the incident angle of a light beam is adjusted according to the taper deviation; meanwhile, an equivalent deviation is obtained by combining the deviation field and the circumferential deviation and weighting, a single-pulse laser energy is dynamically adjusted through a reverse adjustment function, and a flat-top beam shaping is matched, so that precise energy distribution is realized. The method can effectively improve the size precision and taper consistency of a laser processed hole.

The invention relates to a copper and copper alloy laser welding method and a laser welding device, and relates to the technical field of laser welding, and the method comprises the following steps: clamping and fixing two parts to be welded, ensuring that welding surfaces are attached, setting a welding track, setting laser parameters, and superposing a central light beam and a flat-topped light beam to form a welding light beam; driving the welding beam to move relative to the welding seam for welding, and observing the state of the molten pool in the welding process. The temperature gradient of the weld pool is reduced, and the weld pool is stabilized; and the center temperature of the welding seam is reduced, vaporization of low-melting-point elements during welding of brass and other copper alloys is reduced, and therefore splashing in the welding process and the appearance of the welding seam are improved, and the welding seam quality is improved.

The invention relates to an optical assembly capable of forming a double-ring-shaped focusing light beam, a spectrum detection device and a spectrum detection method. The method comprises the following steps: converting laser into a flat-topped light beam, converting the flat-topped light beam into a double-ring-shaped focusing light beam, and forming a double-ring-shaped focusing light spot on a focusing plane by the double-ring-shaped focusing light beam; a multi-parameter immunochromatography test strip is arranged, the plane where the multi-parameter immunochromatography test strip is located coincides with the focusing plane, and a detection line and a quality control line arranged on the multi-parameter immunochromatography test strip form an inner annular structure and an outer annular structure respectively; after a sample is loaded on the multi-parameter immunochromatography test strip, an inner annular focusing light spot acts on a detection target object fixed on a detection line to excite corresponding surface Raman scattering; the outer annular focusing light spot acts on a molecular probe fixed on a quality control line to excite corresponding surface Raman scattering; and carrying out spectral analysis on the Raman scattering light. According to the invention, the problem of simultaneous high-sensitivity detection of various to-be-detected targets is solved, and the detection efficiency is improved.

The application discloses a laser processing device and a laser processing method, and relates to the field of laser processing.The device comprises a composite beam shaper, a diffraction optical element and a super surface.The diffraction optical element and the super surface are respectively located on two sides of the base.The composite beam shaper converts an incident light beam into a target flat-top light beam by changing at least one of the length of a super atom in the super surface in two orthogonal directions, the azimuth angle of the super atom and the height of a structural unit in the diffraction optical element, and adjusting the phase distribution of the composite beam shaper.By combining the diffraction optical element and the super surface, a composite beam shaping device is generated, so that the laser Gaussian energy distribution is shaped into a flat-top uniform energy distribution.The composite beam shaping device is used to replace the beam shaping element and the objective lens in the traditional laser processing system, so that the problems, such as large volume and complex optical path, inherent in the traditional beam shaping system can be solved, and the miniaturization and integration of the processing device are realized.