38 results about "Disk laser" patented technology

The pulverized coal rotational flow stable combustion burner comprises a shell, a primary air pipe, a first swirler, a backflow cap and a laser generator assembly, a secondary air duct is defined between the primary air pipe and an air guide section, the first swirler is arranged in the secondary air duct, the backflow cap is arranged in the secondary air duct, and the laser generator assembly is arranged in the secondary air duct. The backflow cap is arranged in the combustion chamber and located at the outlet end of the primary air pipe. The laser generator assembly is used for emitting sheet-shaped laser beams into the combustion chamber so as to ignite pulverized coal in the combustion chamber. According to the invention, the size and the shape of the laser beam spot are adjusted, and the ignition efficiency and the stability in the pulverized coal combustion process are obviously improved by the aid of a cooling and combustion control strategy in which tertiary air and secondary air are matched; meanwhile, the laser power and mode can be flexibly switched, different coal quality and load working conditions can be adapted, the adaptability and combustion efficiency of the combustor are greatly improved, the service life of a hearth and related parts is prolonged, and the operation cost is reduced.

The invention discloses a high-frequency hydroxyl marking speed measurement device and method, and relates to the technical field of flow field non-contact measurement, and the device comprises an ultraviolet femtosecond laser, two shaping units, a first laser, a camera, a time schedule controller, and a computer. The ultraviolet femtosecond laser is used for outputting ultraviolet femtosecond laser, shaping the ultraviolet femtosecond laser into filamentous laser through the first shaping unit, and injecting the filamentous laser into a flow field measurement area to generate labeled molecules; the first laser is used for outputting first laser, shaping the first laser into sheet laser through the second shaping unit, and injecting the sheet laser into a flow field measurement area to generate labeled molecular fluorescence; the camera is used for collecting labeled molecule fluorescence images to obtain spatio-temporal data; the time sequence controller controls the time sequence of each component of the device; processing spatio-temporal data of labeled molecular fluorescence by a computer to obtain a flow field velocity; the ultraviolet femtosecond laser with high instantaneous energy density is selected as the write-in laser, the repetition frequency of each part is improved, and the problems that conventional hydroxyl marking speed measurement depends on the high-temperature condition of a to-be-measured flow field environment and the repetition frequency is low are solved.

The invention provides a disc laser cutting, chamfering and splitting method, and relates to the technical field of glass product processing, and the method comprises the following steps: carrying out annular shape cutting on a to-be-processed glass raw material by using Bessel laser, and determining a mark point at the center of the to-be-processed glass raw material; according to the marking points, a camera is used for marking and positioning, and coordinate values of chamfering are obtained; performing laser chamfering on the current glass raw material according to the chamfering coordinate value to obtain a chamfered workpiece; the chamfered workpiece is sequentially moved below an outer ring heating block and an inner ring heating block, outer ring waste materials and inner ring waste materials sequentially and automatically fall off through the thermal expansion and cold contraction effect, and the finished annular glass piece is obtained. The problems of high glass processing cost, poor precision and environmental pollution in the prior art are solved.

The invention discloses a suspended polygonal GaN micro-disk laser and a preparation method thereof, and belongs to the field of semiconductor lasers. The laser comprises a polygonal resonant cavity and output waveguides which are manufactured on a substrate, wherein each vertex angle or two non-adjacent vertex angles of the polygonal resonant cavity are respectively connected with the output waveguides; the polygonal resonant cavity can be a regular quadrilateral, regular hexagonal or regular octagonal resonant cavity; the preparation method comprises the following steps: growing a SiO2 mask layer on an epitaxial layer of a substrate; defining a required micro-disk graph; transferring the pattern to the SiO2 mask layer; etching the epitaxial layer until the substrate is exposed; corroding the substrate until the substrate at the bottom of the polygonal resonant cavity is completely corroded; the micro-disk laser provided by the invention is simple in structure, mature and reliable in preparation process and suitable for the field of optical communication and photoelectric integration.

The application discloses a multi-pass disk laser amplifier, which comprises a near end and a far end, a pump laser beam, a seed laser beam, a first parabolic mirror, a second parabolic mirror, a laser gain medium, a first deflection optical prism group and a second deflection optical prism group, wherein the laser gain medium comprises a medium reflection surface; the pump laser beam located at the near end is aligned to the first parabolic mirror located at the far end for incidence through a first beam collimator; and the seed laser beam located at the near end is aligned to the second parabolic mirror located at the far end for incidence after passing through a second beam collimator. Compared with a conventional multi-pass disk laser amplifier, the application has a simpler structure, a shorter amplification optical path, a more compact volume and higher system stability. Furthermore, by changing the structure of the design prism of the pump light path, 12-pass, 24-pass, 36-pass, 48-pass and other multi-pass amplifications can be realized.

The present invention relates to the field of optical technologies, and particularly to a measuring device and a measuring method for the thermal effect parameters of a disk laser crystal. The measuring device includes a first laser, a lens group, a beam splitting prism, a fixed-focus lens, a filtering unit, an imaging unit, a standard plane mirror, and a measuring unit; the lens group and the beam splitting prism are sequentially arranged along the light output optical path direction of the first laser. The first laser is used for emitting a probe light, and the probe light is expanded and collimated by the lens group and then split by the beam splitting prism. The first transmitted light forms a reference light spot; after the first reflected light is reflected by the standard plane mirror, a second reflected light is obtained, and the measuring unit is arranged along the optical path direction of the second reflected light; after the second reflected light is transmitted by the beam splitting prism, it is reflected by the disk laser crystal and returns along the original path to form a detection light spot. The technical solution provided by the present invention can not only measure the parameters of the thermal lens effect of the disk laser crystal in the laser to be measured, but also measure the parameters of the thermal air wedge effect.

1. The name of the design product: continuous disc laser. 2. The use of the design product: a mechanical structure as part of a laser emitter to deflect and shape the laser to produce a specific specification of light spot. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: assembly 8 perspective view. 5. Other components that need to be explained: component 1 laser steering module: used to deflect the transmission direction of the laser; component 2 optical shutter: through the mirror set in it, the transmission direction of the laser can be controlled; component 3 wedge angle mirror beam deflection module: deflects the incident laser to the ring core optical fiber, and outputs a ring light spot; component 4 optical fiber coupling module: couples the spatial light into the optical fiber; component 5 absorber: by expanding the laser beam, the laser is uniformly distributed on the mechanical black body surface; component 6 diaphragm 1: a mechanical part with a through hole, used to absorb stray light and non-Gaussian part of the laser, and shape the laser; component 7 diaphragm 2: a mechanical part with a through hole, used to absorb stray light and non-Gaussian part of the laser, and shape the laser; component 8 resonant cavity light source: disc laser resonant cavity main body, mainly used for emitting laser.

An optical-pumped semiconductor disk laser based on a photonic crystal relates to the field of semiconductor lasers. While eliminating the waste heat generated by the pump light that causes high-order modes and boosting the power, it achieves a fundamental transverse mode with M2 = 1 and equal M2 factors for the X-axis and Y-axis, presenting a fundamental transverse mode Gaussian spot. The laser includes: an incident pump light source, a gain chip, and an external resonant cavity mirror; the incident pump light source performs surface pumping on the gain chip under the condition of oblique incidence to achieve population inversion, enabling the lasing laser to transmit in the cavity surface formed by the gain chip and the external resonant cavity mirror; the gain chip reflects the excess pump light to control the thermal effect and the transverse mode quality. The photonic crystal structure of the present invention has the characteristic of high reflection for the pump light source, so it can suppress high-order modes and reduce the thermal effect that causes high-order mode pump spots. The range of the pump spot is restricted to pump only within the fundamental transverse mode range on the chip.

The invention discloses a novel micro-channel type cooling structure device for a disc laser. The novel micro-channel type cooling structure device comprises a sealing cover, a heat sink, a crystal, a supporting ring and a vortex-shaped channel. The sealing cover and the shell are made of copper-tungsten alloy vortex-shaped flow channels, the main body material of the vortex-shaped flow channels is diamond, and the vortex-shaped flow channels are realized through an etching process, and the vortex-shaped flow channels have the structural advantages that water inlets are formed in the periphery and water outlets are formed in the center, so that the influence on the crystal surface shape caused by overlarge stress generated on the back surface of a heat sink during collision of a traditional jet flow structure is avoided; the light beam quality is reduced; meanwhile, the four vortex flow channels are combined with local impact, so that the fluid generates strong secondary flow and boundary layer disturbance, the convective heat transfer coefficient is increased, a circular heat source of a light spot with the diameter of 17 mm is well adapted, and compared with a traditional micro-flow-channel structure, the temperature uniformity is greatly improved. The invention has the advantage that the problems of stress deformation and non-uniform heat dissipation existing in large-area sheet crystal heat exchange are solved through a unique bionic flow channel structure.

The invention discloses a GaN bridging micro-disk laser capable of directionally emitting laser and a preparation method thereof, and belongs to the technical field of semiconductor photoelectric devices. A bridging polygonal microcavity structure is provided, extending bridge structures are introduced at vertex angles of a quadrilateral microcavity and a circular microcavity, mirror symmetry of polygons is broken through geometric coupling of bridges and a main cavity, and an echo wall mode is directionally coupled to an output waveguide. The bridging structure can be achieved through conventional photoetching and dry etching, complex deformation etching is not needed, and the technology is compatible with an existing CMOS production line. The side wall damage is repaired through wet etching, the light field scattering loss is reduced, the mode stability is improved, and a robust solution is provided for high-density integration.

The present invention discloses a femtosecond disk laser combining active and passive mode locking, belonging to the field of disk lasers. The femtosecond disk laser comprises: a pump source, a pump cavity, a disk laser crystal, and a resonant cavity. The pump source emits pump laser light, which is reflected multiple times in the pump cavity and passes through the disk laser crystal multiple times to generate oscillating laser light. The resonant cavity comprises a first branch and a second branch. The first branch comprises a dispersion mirror group, a hard aperture, and an output mirror arranged in sequence along the optical path. The second branch comprises a first concave mirror, a second concave mirror, a first high-reflection mirror, a third concave mirror, an acousto-optic modulator, and a second high-reflection mirror arranged in sequence along the optical path. The acousto-optic modulator is located at the focus of the third concave mirror and modulates periodic loss during active mode locking and initiates passive mode locking. The oscillating laser light generates a femtosecond laser pulse sequence after passing through the acousto-optic modulator. The pulse sequence is then reflected back to the disk laser crystal along the original path, enters the first branch, and is output through the output mirror.

This application belongs to the field of laser amplification technology and provides a beam-actively controlled disk laser amplifier, comprising: a disk crystal for laser amplification; a seed light source for providing a polarized seed laser to be amplified, the seed laser having a first diameter spot at the disk crystal, and the size of the first diameter spot being dynamically adjustable; a pumping device for pumping the disk crystal, the pump light emitted by the pumping device having a second diameter spot at the disk crystal; and a spot adjustment component for dynamically adjusting the size of the first diameter spot, so that the ratio of the first diameter spot to the second diameter spot is within a preset range. This application uses a spot analysis device to monitor the diameter of the output seed amplified laser spot and uses a surface shape adjustment mirror to calibrate the spot diameter of the seed light in real time, thereby achieving a stable output spot diameter from low to high pump power and under power fluctuations, thus ensuring the stability of the output laser power and beam quality.

The present invention discloses a femtosecond disk laser that generates an eye-safe wavelength band, belonging to the field of femtosecond laser technology. The femtosecond disk laser that generates an eye-safe wavelength band includes a pump source, a disk crystal, a pump cavity, and a resonant cavity. The pump cavity allows the pump light emitted by the pump source to pass through the disk laser crystal multiple times and then excite and generate oscillating laser light. In the resonant cavity, the first branch includes a high-dispersion mirror and an output mirror arranged in sequence along the optical path. The oscillating laser light is transmitted along the first branch to the output mirror and then returns to the disk laser crystal along the original path and is reflected to the second branch. The second branch includes a first concave mirror, a second concave mirror, a Cr mirror, and a Cr mirror arranged in sequence along the optical path. 4+ :YAG crystal and high reflective mirror; Cr 4+ The YAG crystal acts as a passive mode-locking device and also as a gain medium to generate eye-safe femtosecond laser pulse trains. This femtosecond disk laser has a simple structure and can produce stable femtosecond laser output in a specific wavelength band.

The invention provides a sunlight direct pumping disc laser, which belongs to the field of lasers and comprises a sunlight collection system, an energy output end of the sunlight collection system is connected with an optical fiber coupling head, and the optical fiber coupling head is connected with a disc laser through an optical fiber; or, the energy output end of the sunlight collection system is provided with an optical lens group, and the light source output end of the optical lens group is provided with a disc laser. Sunlight can be directly used as a pumping source, and stable and efficient laser output can be generated without an external power supply or complex energy conversion equipment.

The challenge lies in how to distinguish and detect each group of microparticles when multiple groups of microparticles are present. [Solution] The microparticle swarm detection device 10 irradiates a predetermined area including the workpiece 60 with green sheet laser light and red sheet laser light, switching the emission timing of these lights in a time series, and uses the imaging unit 15 to capture a video of the predetermined area including the workpiece 60. Then, frames captured with green sheet laser light and frames captured with red sheet laser light are extracted from the captured video to generate a video of green frames and a video of red frames. Subsequently, the microparticle swarm detection device 10 detects microparticle swarms based on the extracted video of green frames. The microparticle swarm detection device 10 also detects microparticle swarms based on the extracted video of red frames.

This invention discloses a glass bubble detection system and method based on orthogonal laser scattering, which relates to the field of industrial machine vision technology. It includes: a conveying device for carrying the glass to be tested and moving it along... Z Uniformly moving along the axial direction; a line laser emitting unit, used to generate a laser perpendicular to the upper surface of the glass under test and perpendicular to the axis. Z shaft and X The invention comprises a planar sheet-like laser light curtain formed by an axis; a side-viewing imaging unit for acquiring images of the laser scattering spot as the glass under test passes through the sheet-like laser light curtain; and a central processing unit for controlling the synchronous triggering of the transmission device and the side-viewing imaging unit, and processing the laser scattering spot images to identify bubble defects inside the glass under test. This invention solves the problem of traditional transmission methods being unable to obtain depth information, significantly improving the positioning accuracy of microbubbles and the accuracy of defect classification.

This invention relates to a multi-pass optical path system and its adjustment method for an off-axis dual-reflector disk laser, overcoming a series of problems associated with existing multi-pump schemes for disk lasers, such as high processing requirements, difficult system assembly and adjustment, and complex structure and difficult optical adjustment of the signal light amplification system. This invention employs a combination of a series of small-aperture spherical or aspherical mirrors and total reflection mirrors, utilizing a discrete adjustment method to uniformly distribute the pump spot across different mirror surfaces, achieving multi-pass pumping of the pump light and improving the beam quality of the output laser. Simultaneously, a focusless system structure is used to achieve multi-pass amplification of the signal light, improving the operability of optical adjustment. Furthermore, the system can achieve a common optical path for pumping and amplification, facilitating high-efficiency absorption of the pump light and optimal signal light gain amplification; it also allows for adjustment of the number of multi-passes, resulting in high system flexibility, low processing and debugging difficulty, convenient equipment maintenance, and ease of industrial application.

The invention discloses a high limiting factor GaN micro-disk laser suitable for electric driving, which is prepared based on an epitaxial wafer used by a silicon substrate GaN, and the epitaxial wafer structurally comprises a substrate layer, an AlGaN buffer layer, a u-GaN layer, an n-GaN layer, an n + GaN layer, a u-GaN layer, a quantum well and a p-GaN layer. And the n + GaN layer is of a uniform and sparse nanopore layer structure. By adopting the nanopore layer structure, the refractive index difference between the active region and the surrounding medium is improved, and the optical restriction in the microdisk is greatly enhanced. In the invention, the traditional Ti / Al / Ni / Au is not used as the p electrode, but the Cr / Au two-layer metal is used as the p electrode, and the deposition thicknesses are respectively 50 nm and 30 nm. The metal Cr can form ohmic contact on the surface of the p-GaN during current injection, so that the contact resistance is reduced, and the current injection efficiency of the micro-disk is improved.

The present invention discloses a high-frequency hydroxyl labeling speed measurement device and method, which relate to the field of non-contact flow field measurement technology. The device and method comprise: an ultraviolet femtosecond laser, two shaping units, a first laser, a camera, a timing controller and a computer; the ultraviolet femtosecond laser is used to output an ultraviolet femtosecond laser, which is shaped into a filamentary laser by the first shaping unit and then injected into a flow field measurement area to generate labeled molecules; the first laser is used to output a first laser which is shaped into a sheet laser by the second shaping unit and then injected into the flow field measurement area to generate labeled molecule fluorescence; the camera is used to collect labeled molecule fluorescence images to obtain spatiotemporal data; the timing controller controls the timing of various components of the device; and the computer processes the spatiotemporal data of the labeled molecule fluorescence to obtain the flow field velocity; the present invention selects an ultraviolet femtosecond laser with high instantaneous energy density as a writing laser to improve the repetition frequency of various components, thereby solving the problem that conventional hydroxyl labeling speed measurement depends on the high temperature conditions of the flow field environment to be measured and the repetition frequency is low.

FIELD OF THE DISCLOSURE The present invention relates to a laser system. More particularly, the present invention relates to a diode pumped laser system. More particularly, the present invention relates to a laser diode pumped thin disk laser, where the laser head is connected to a laser diode pump source by a fiber cable.

This invention discloses a flow field measurement device and method for an annular combustion chamber, comprising: an intake system including an intake structure for connecting to the head of the annular combustion chamber, the intake structure having intake channels matching the number and circumferential position of the head of the annular combustion chamber; a tracer particle generator for injecting tracer particles into one or more intake channels to obtain a target tracer particle concentration in a target measurement area; an exhaust system including an exhaust structure for connecting to the tail end of the outer casing of the annular combustion chamber, the exhaust structure guiding the exhaust gas from the annular combustion chamber out; and a PIV measurement system for emitting sheet-like lasers into the interior of the annular combustion chamber at one or more preset circumferential positions and measuring the flow field within the annular combustion chamber.

The present invention relates to the field of laser technology, and discloses a dynamic thermal focal length controllable module and a disk laser, comprising: a deformable mirror, arranged on the optical path of an outgoing laser after being pumped by a laser crystal, for generating a compensating surface shape conjugate with the aberration of the laser crystal; an imaging component, arranged on the reflected optical path of the deformable mirror, for obtaining the light intensity distribution of the outgoing laser by measuring the outgoing laser reflected by the deformable mirror; and a closed-loop control module, for calculating the variation of the deformable mirror according to the light intensity distribution, adjusting the deformable mirror according to the variation, and compensating for the thermally induced surface shape error of the laser crystal. The present invention uses the deformable mirror as a phase compensation element, and based on the principle of adaptive optics, converts the comprehensive aberration generated by the transmission element into the surface shape error of a single reflecting surface for characterization. By changing the surface shape of the deformable mirror by piezoelectric means, it is ensured that the surface shape of the deformable mirror can accurately correct the wavefront distortion introduced by the surface shape of the disk laser crystal, thereby solving the error accumulation problem in multi-interface interferometry.

This invention discloses a light scattering method for testing droplet drift, comprising a bottom support, a guide rail, a first instrument body, a second instrument body, and photodetectors. The guide rail is mounted on the bottom support at both ends. The first and second instrument bodies are movably mounted on the guide rail. Two photodetectors are mounted on the first and second instrument bodies, respectively. A sheet-like laser emitter is housed within the first instrument body. The sheet-like laser emitter has an optical path formed by a laser, an aperture, a Powell prism, and an aspherical lens arranged sequentially. The laser emits a parallel beam, which is filtered through the aperture, compressed into a sheet-like diverging beam by the Powell prism, and finally collimated by the aspherical lens to become a parallel sheet light source. This invention saves time and costs, simplifies the experimental procedure, protects testing personnel, and provides reliable experimental results.

The present invention relates to the field of laser technology, and specifically provides a pump module with controllable thermal focus, a disk laser, and a laser amplifier. The pump module with controllable thermal focus includes: a multi-pass coupling cavity for pumping the pump light multiple times in the multi-pass coupling cavity, including a thin sheet laser crystal; a light source module including a plurality of matrix-arranged light sources, wherein the plurality of matrix-arranged light sources respectively form a plurality of irradiation areas on the laser crystal, and the power of the plurality of matrix-arranged light sources is adjusted to make the optical path difference of each irradiation area on the laser crystal consistent; and a collimation module for collimating the outgoing light beam of the light source module. The present invention customizes a light source spot with a specific light intensity distribution according to the surface shape of the disk crystal, aiming to achieve uniform temperature distribution inside the disk. By designing the light intensity distribution of the incident light according to the surface shape of the disk crystal, it can be ensured that the optical path difference of each point of the disk crystal remains consistent during the increase of the pump power.

The invention belongs to the technical field of laser amplification, and provides a light beam active control disc laser amplifier, which comprises a disc crystal used for realizing laser amplification; the seed light source is used for providing a polarization state to-be-amplified seed laser, the to-be-amplified seed laser is provided with a first diameter light spot at the disc crystal, and the size of the first diameter light spot is dynamically adjustable; the pumping device is used for pumping the disc crystal, and pumping light emitted by the pumping device has a second diameter light spot at the disc crystal; and the light spot adjusting assembly is used for dynamically adjusting the size of the first-diameter light spot, so that the ratio of the first-diameter light spot to the second-diameter light spot is within a preset range. According to the application, the spot diameter of the output seed amplification laser is monitored by using the spot analysis device, and the spot diameter of the seed light is calibrated in real time by using the surface shape adjusting mirror, so that the spot diameter is stably output from low to high pumping power and under power fluctuation, and the power of the output laser and the stability of light beam quality are ensured.

The invention discloses a pump light coupling device and method for a high-power disc laser based on a prism array. The device is characterized in that a disc laser gain medium is arranged on a heat sink substrate; the plurality of rectangular prisms are circumferentially and uniformly distributed on the outer side of the central area of the disc laser gain medium; the right-angle prism is installed on the disc laser gain medium through a first right-angle face, the inclined face of the right-angle prism is located on the side away from the center area of the disc laser gain medium, and the inclined face of the right-angle prism is plated with a medium film with high transmissivity on the pumping light wave band. And a second right-angle surface of the right-angle prism faces one side of the central area of the disc laser gain medium. The method comprises the following steps: establishing a quantitative mathematical model for pump light coupling; and multiple groups of incident pump light are incident to the inclined planes of the corresponding rectangular prisms in a normal incidence manner, enter the disc laser gain medium through coupling of the first right-angle surfaces of the rectangular prisms, and then are propagated to a central area through a waveguide effect. The device and the method can realize efficient coupling of the pump light.

The disclosure provides a large-energy disc laser thermal lens effect control system, comprising: a pump beam shaping system for outputting shaped pump laser; a disc crystal for generating large-energy laser under the excitation of the pump beam shaping system; a first detector for detecting the thermal distribution of the front surface of the disc crystal; a second detector for detecting the temperature change of the side surface of the disc crystal and / or the height change of the thermal expansion of the disc crystal and the thermal distribution of the side surface; wherein the first detector and the second detector are colloidal quantum dot mercury telluride infrared detectors, the first detector and the second detector are respectively connected with a control system, the control system adaptively regulates and controls the pump laser output by the pump beam shaping system based on the detection results of the first detector and the second detector, so as to control the thermal lens effect of the disc crystal, and further improve the optical performance of the large-energy disc laser.

This application relates to the field of laser technology. This application provides a high-power pulse width and repetition rate tunable laser, including: an input / output optical path configured to input seed light and output amplified laser light; a regenerative amplifier optical path configured to amplify the input seed light; a pulse width compression module configured to compress the pulse width of the amplified seed light and output high-power pulsed laser with tunable pulse width. The pulse width compression module includes: a third polarization beam splitter, a third half-wave plate, a first electrically controlled laterally moving plane mirror, a second electrically controlled laterally moving plane mirror, a nonlinear crystal, and a fourth plane mirror. Based on the multi-pass compression method of the nonlinear crystal, the present invention constructs a high-power disk laser, which contains a nonlinear crystal and a half-wave plate or a ring cavity with a Pockels cell for pulse width compression, and finally obtains a high-power pulse width and repetition rate tunable pulse train through the electrically controlled laterally moving plane mirror.

The invention provides an on-line measuring device and method for particle size, which can be applied to the technical field of particle size measurement. The on-line measuring device comprises a transparent pipe arranged at the tail end of a powder feeding pipeline of the micro powder preparation machine; a sheet laser generator configured to provide sheet laser to the transparent tube; the detector is configured to detect the scattered light of the particles in the transparent tube under the irradiation of the sheet laser to obtain a time sequence signal of the intensity of the scattered light; the processor is configured to obtain the particle size of the particles according to the time sequence signal of the scattered light intensity, and online measurement of the particle size of the particles of the micro powder preparation machine is achieved.

The invention provides a plant phenotype detection system and method based on a multi-wavelength Shanghai laser radar. The system comprises a laser emitting assembly and a receiving imaging assembly, the laser emitting assembly is used for emitting multi-wavelength coaxial sheet laser to irradiate a plant target, and different wavelengths correspond to reflection characteristic differences of plant tissues in different spectral bands; the receiving imaging assembly comprises a receiving lens and an image sensor, and the included angle between the optical axis of the receiving lens and the imaging plane of the image sensor is configured to meet the Saborne imaging condition, so that object points in the irradiation range of the sheet-shaped laser can be clearly imaged on the image sensor. The method comprises the steps of performing imaging acquisition on multi-wavelength laser reflection signals, performing response correction and decoupling on imaging signals based on multi-channel spectral response characteristics of an image sensor to obtain multi-wavelength reflection intensity information, and realizing plant structure identification and phenotype parameter extraction by combining three-dimensional point cloud data and multi-band spectral characteristics.