253 results about "Parallel beam" patented technology

The invention relates to the technical field of semiconductor detection, in particular to a wafer bright field illumination and imaging system, a wafer defect detection device and a wafer defect detection method, the system comprises an illumination module, a beam combining module, an objective lens module and an acquisition imaging module; wherein the illumination module generates an illumination light beam adaptive to a wafer detection view field; the beam combining module realizes non-interference separated transmission of an illumination light path and an acquisition light path through a reflection area and a transmission area which work independently; the objective lens module converges the light beams reflected by the reflection area to the surface of the wafer, and controls the light beams to form illumination only at the edge of an entrance pupil so as to realize off-axis illumination; meanwhile, the reflected light beams on the surface of the wafer are collimated and then transmitted to the transmission area; and the acquisition imaging module receives the parallel light beams, converts optical signals into electric signals, and generates a wafer surface image. According to the invention, the problems of high energy loss, high cost, low detection rate and insufficient resolution of a traditional bright field detection system are effectively solved.

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.

The invention provides a multi-geometric-structure incident light path guiding device and X-ray diffraction equipment. The device comprises a reflector assembly and a movable slit assembly, the reflector assembly and the movable slit assembly are arranged on an irradiation path of an incident light beam, and a reflecting surface of the reflector assembly is arranged to reflect and adjust the received incident light beam into a focused or parallel light beam geometric structure and face the center of the goniometer; the reflector assembly is provided with a light beam channel. When the target light beam is geometrically a focused or parallel light beam, the movable slit assembly is configured to guide the incident light beam to the reflecting surface, and the reflected incident light beam reaches the center of the goniometer; when the target light beam is geometrically a divergent light beam, the movable slit assembly is configured to guide an incident light beam to pass through the light beam channel and reach the center of the goniometer. The device is simple in structure and flexible in switching, and an independent multi-stage nested translation or rotation compensation structure does not need to be additionally arranged.

The invention discloses an electrically-controlled variable optical attenuator based on a multistage wedge-shaped liquid crystal box and an attenuation control method, the attenuator comprises a laser, the laser provides an incident light signal, the divergent incident light signal is converted into a collimated parallel light beam through a collimator, the collimated parallel light beam is subjected to deflection modulation through a multistage wedge-shaped liquid crystal box module, and the modulated light beam is converted into a modulated light beam; the multi-channel liquid crystal controller is coupled to the output optical fiber through the optical fiber coupler, and generates and outputs driving voltage signals capable of being independently adjusted to the N-stage wedge-shaped liquid crystal box module, so that each wedge-shaped liquid crystal box in the multi-stage wedge-shaped liquid crystal box module is independently controlled; the control method comprises the steps of receiving a target instruction, querying a system-level relationship, distributing a deflection task, querying a device-level relationship, outputting a driving signal and performing closed-loop feedback correction. According to the invention, a large attenuation range is obtained, and at the same time, millisecond-level and even sub-millisecond-level rapid response is realized; the precision, the linearity and the usability of attenuation control are improved, and the control complexity is reduced.

The invention, which belongs to the technical field of spectral imaging, discloses an ultra-wide-band ultra-wide-field-of-view high-spectral-resolution real-time imaging spectrometer comprising a first micro-lens array, a plurality of optical fibers, a plurality of second micro-lens arrays and a plurality of assemblies. First micro lenses in each column of the first micro lens array are arranged on a vertical plane arc, and micro lenses in each row are arranged on a horizontal plane straight line, so that incident light of a one-dimensional ultra-wide view field is obtained in real time; through optical fiber coupling, incident light is transmitted to the second micro lens array to be collimated into parallel light beams; according to the components, light of different wavebands is processed through the optical filter, the plane transmission grating and the detector, first-order diffraction light beams of different wavelengths in the different wavebands are received by the detector after diffraction, and space information and spectral information are obtained in real time according to an irradiated target block. The imaging spectrometer provided by the invention has the advantages of ultra-wide wave band, ultra-wide field of view, high spectral resolution, real-time measurement, compact structure and high stability, and is suitable for a remote sensing photoelectric reconnaissance detection system.

The invention discloses an immersed tube butt joint installation method and system based on laser ranging and visual recognition, and belongs to the technical field of ocean engineering. The method comprises the steps that a laser target set is installed on the butt joint end face of an installed pipe joint, and a laser positioning set and a laser projector are installed on the butt joint end face of a to-be-installed pipe joint; after the to-be-installed pipe joint sinks, the laser positioning group is started to measure the distance to the target group in real time, meanwhile, parallel light beams are emitted to the other end face of the to-be-installed pipe joint through the laser projector, and the position of a light spot is collected through visual recognition to obtain posture deviation; the distance and deviation data are fused, the optimal pose of the pipe joint to be installed is calculated through an optimization algorithm, and then the offset of the end face center and the axis deflection angle are obtained; and according to the parameters, a regulation and control instruction is generated, and the ballast water system and the winch system are controlled to adjust the posture of the to-be-installed pipe joint till accurate butt joint is achieved. According to the invention, full-underwater, high-precision and automatic immersed tube butt joint is realized, and the dependence on an overwater measuring tower and a GPS (Global Positioning System) is eliminated.

The invention relates to a structured light imaging system suitable for semiconductor SIP system-in-package, which comprises a central camera, and a plurality of groups of DLP projections and side cameras are symmetrically arranged on two sides of an optical axis of the central camera; the DLP projector emits parallel light beams to irradiate the surfaces of the crystal grains, and the side cameras receive reflected light rays in parallel; the device further comprises a control unit, and the control unit sequentially controls the DLP projectors and the side cameras which are symmetrically arranged in pairs to synchronously work and processes image data so as to reconstruct the three-dimensional morphology of the surface of the crystal grain. When incident light emitted by the DLP projector irradiates the surface of the crystal grain at a specific angle, specular reflection light of the incident light propagates in the symmetrical direction according to the reflection law. The side camera and the DLP projector are symmetrically arranged, so that the optical axis of the side camera is consistent with a reflection light path, and a highlight area image generated by mirror reflection is accurately captured. The layout breaks through the limitation of the traditional diffuse reflection hypothesis, so that the morphology information of the high-reflection surface can be completely acquired, and the accuracy and reliability of crystal grain three-dimensional reconstruction in SIP packaging are remarkably improved.

The invention discloses a railway signal relay contact pressure sensor which comprises an elastic body, a probe fixed at one end of the elastic body and at least one sensitive element attached to the surface of the elastic body. Wherein the elastic body comprises an elastic detection structure, the elastic detection structure is a structure based on double-hole parallel beams, the elastic detection structure is composed of two parallel beams and two vertical beams, and the elastic detection structure can generate parallelogram deformation. The contact pressure sensor meets the use requirements of railway signal relay contact pressure measurement.

The invention relates to the technical field of near-to-eye display, and provides a near-to-eye display method and near-to-eye display device.According to the method, a high-resolution original electronic image is generated through a micro display screen, accurate information content is provided for a user, and the quality and definition of an information source are ensured. The collimating projection lens converts divergent light of the micro display screen into parallel light beams, disordered scattering of light is reduced, and images of the micro display screen are imaged at an infinite distance after passing through the collimating lens. Parallel light beams are directionally regulated and controlled through micro-structure devices such as a micro-cube-corner prism array or an orthogonal reflector array, the parallel light beams are converged to a small-size exit pupil area, on-demand display of image information is achieved, an image can be seen only when the sight line of a user is aligned, and therefore continuous interference of the information on the normal view field of the user is avoided, and the user experience is improved. The comfort and concentration degree of visual experience are improved, the information transmission effect is optimized, and more natural, comfortable and efficient man-machine interaction experience is provided for near-eye display equipment.

The utility model belongs to the technical field of sensors, and discloses a miniaturized deviation rectifying sensor, which comprises a light source, a Fresnel diffraction mirror, a photoelectric detector and a signal processing module which are sequentially arranged along the direction of a light path, the light source emits divergent light beams to the Fresnel diffraction mirror, the Fresnel diffraction mirror receives the divergent light beams, converts the divergent light beams into parallel light beams and emits the parallel light beams to the photoelectric detector, and the photoelectric detector receives the parallel light beams and outputs electric signals to the signal processing module. And the signal processing module outputs offset according to the electric signal. According to the utility model, by arranging the Fresnel diffraction mirror, divergent light beams are directly converted into parallel light beams, an additional light path adjusting device is not needed, the overall structure size of the sensor is reduced, the stability and the detection precision of the light beams are improved, high-efficiency acquisition and processing of signals are ensured, and the detection accuracy is further improved.

The invention provides a real-time detection system and method for fluorescence signals of bacteria in air, and the system comprises a narrow-band spectrum light source which is used for radiating narrow-band exciting light matched with fluorescent substances in the bacteria, and exciting the fluorescent substances in the bacteria to generate fluorescence; the collimation system is used for collecting light energy output by the narrow-band spectrum light source and converting divergent light beams into parallel light beams; the light conversion aggregator is used for distinguishing bacterial fluorescence and Mie scattered light, converting the effective bacterial fluorescence into secondary fluorescence and converging the secondary fluorescence, and the narrow-band exciting light passes through the light conversion aggregator after being collimated by the collimation system; the detection system is used for converting the secondary fluorescence signal into an electric signal; the control system is respectively connected with the detection system and the narrowband spectrum light source and is used for controlling the detection system and the narrowband spectrum light source to work; and the flow field system is used for driving air flow to flow through the light conversion aggregator. The structure is simple, and optical signal interference generated by Mie scattering can be inhibited.

The application relates to an improved cage type light field imaging system and a debugging method, and belongs to the technical field of light field imaging. The system comprises a main lens for collecting light spots on an object plane and imaging light emitted by the light spots onto a microlens; the microlens is used for separating the light collected by the main lens into light beams in different directions and imaging the light beams onto a virtual image plane; a relay lens is used for twice imaging the light beams in different directions onto different pixels of a CCD detector of a camera; the relay lens comprises a first lens and a second lens, the focal lengths of the first lens and the second lens are both positive, the focal length of the first lens is smaller than that of the second lens, and the magnification of the relay lens is greater than 1:1. During the debugging process of the system, parallel light beams are arranged in front of the microlens, and the parallel light beams are vertically injected into the microlens to determine the position of the microlens. The system is not affected by the vignetting and distortion generated by the relay lens, and the debugging method improves the positioning accuracy of the microlens.

The utility model relates to the technical field of steel structure machining tools, in particular to a steel structure parallel beam spacing adjusting device which comprises an adjusting rod, an adjusting handle is arranged at the upper end of the adjusting rod, a rotating head is arranged below the adjusting rod, a fixing block is arranged outside the rotating head, a rotating groove is formed in the fixing block, and the rotating handle is arranged in the rotating groove. The rotating head is installed in the rotating groove in a connected mode, and a clamping piece is installed on the side face of the fixing block and is a fixing clamping piece. The outer surface of the adjusting rod is provided with an external thread, the adjusting device further comprises a movable block, the movable block is provided with a nut hole, the nut hole is internally provided with an internal thread, the adjusting rod is inserted into the nut hole, the internal thread and the external thread are connected in a matched mode, and a clamping piece is installed on the side face of the movable block and is a movable clamping piece; the side face of the clamping piece is provided with an arc-shaped groove for clamping the side face of the steel pipe. The device has the advantages of reducing force and being convenient to use.

The invention discloses a road slope safety inspection method and system based on an unmanned aerial vehicle and vision, and relates to the field of general control systems.The method comprises the steps that the unmanned aerial vehicle is controlled to project parallel light beams with preset physical intervals to a slope, slope optical signals are synchronously captured, and original frame data are generated; performing downsampling on the original frame data to process thumbnail data; determining rough coordinate data of the disease features in the thumbnail data; determining target area data according to a resolution ratio relation between the rough coordinate data and the original frame data; calculating the ratio of the preset physical spacing to the pixel distance, and generating a real-time sampling proportionality coefficient; calculating a product of a pixel number of a disease target in the target area data and a real-time sampling proportionality coefficient, and generating disease physical dimension data; and binding the spatial positioning coordinates when the original frame data is obtained with the disease physical dimension data to generate an inspection result. According to the invention, quantitative data of slope diseases can be obtained under the condition of low computing power.

The invention provides an underwater multifunctional laser optical assembly for a radiation environment. The underwater multifunctional laser optical assembly for the radiation environment comprises a laser source, a process optical fiber, a collimating lens, a reflecting mirror, a forming lens and a gathering lens. The process optical fiber is used for conveying a laser beam generated by the laser source to the collimating lens. The collimating lens is used for adjusting a laser beam transmitted by the process optical fiber from a divergent beam to a parallel beam. The reflecting mirror is used for changing the propagation direction of the parallel light beams to be perpendicular to the direction of the forming lens. The forming lens is used for adjusting the parallel light beams with the changed direction into the specific shape needed by welding. The focusing lens is arranged between the forming lens and the focusing surface in parallel and used for focusing the parallel light beams adjusted by the forming lens to the focusing surface for welding. According to the invention, the formed lens is matched with other lenses, so that the technical problem of how to apply the laser welding technology to a high-radiation underwater scene is solved.

The invention discloses a double-beam scanning photoelectric sensor and a control method, and aims to solve the problem of false triggering when an existing sensor detects an object with a gap or high light reflection. The sensor is mainly composed of a light beam transmitting module, a light beam receiving module, a control processing module and an output module. Wherein the light beam emitting module is composed of two independent infrared lasers and can synchronously emit parallel light beams with the diameter of 1.0-2.0 mm; a state machine logic unit is arranged in the control processing module, output is triggered only when two paths of signals exceed a set threshold value by comparing the intensity of the double-beam signals in real time, and the current output state is maintained when any path of signal is lost; the output module provides an uninterrupted NPN / PNP switching signal. Through double-beam cooperative scanning and special control logic, stable detection can be provided for regular gap objects such as printed circuit boards and trays, transparent or highly reflective materials can be effectively handled, and the false triggering rate is remarkably reduced while the detection reliability is improved.

Disclosed is an electric power equipment internal discharge position and spectral information multiplexing photoelectric sensing device, in a bipolar plate structure, a split light guide array is inserted into the interior of the electric power equipment to collect the discharge light beams from the interior of the electric power equipment, a microlens homogenizing plate is arranged at the bottom of the split light guide array, the upper surface of the microlens homogenizing plate is etched with a microlens array for focusing light signals to form parallel light beams; a fiber panel is arranged at the bottom of the microlens homogenizing plate, the upper panel is a central-symmetrical planar multi-lobe structure to group the parallel light beams, the lower panel is connected to the upper panel through a fiber bundle, and the lower panel is a rectangular structure to group the parallel light beams from the upper panel to form photon signals; a photoelectric array includes a silicon photomultiplier array and a surface spectral coating arranged on the silicon photomultiplier array, and the multiplexing two-dimensional photoelectric array constructs a sparse spectral sensing line array based on the photon signals to generate spectral information and constructs a multi-normal intensity sensing line array to obtain position information.

The invention discloses a high-precision full-polarization angle resolution microscopic system excitation device. The device comprises an excitation light source module, a collimation light source optimization module, an imaging module, a switchable reflector, a spectrometer path and a detector path. The excitation light source module is used for exciting full polarized light; the collimation light source optimization module inhibits the divergence angle of the laser through the converging lens group and transmits the laser to the imaging module; the imaging module irradiates the parallel light beams subjected to divergence angle suppression to the surface of a sample to be detected through a microscope objective, so that angle resolution excitation is realized; and the switchable reflector is used for selecting a path of a signal generated by the to-be-tested sample returned from the beam splitter. The converging lens group is additionally arranged on the periphery of the thin film beam splitter, the focal length of the lens group is accurately calculated and optimized, and the divergence angle of exciting light is inhibited. Through experimental data calculation, after passing through the light path designed by the invention, the drop amplitude of the divergence angle exceeds 75%, and the light path can be cascaded and is compatible with a traditional angle resolution scheme.

The invention belongs to the technical field of nuclear material measurement and analysis, and particularly relates to a neutron detection method for measuring the mass of a nuclear material and a radiation dose field of the nuclear material. According to the embodiment of the invention, the method comprises the steps: carrying out the energy response calculation and calibration of a detector through a parallel beam standard neutron source, and obtaining a calibration factor; performing energy response calculation and calibration on the detector by taking a to-be-measured object as a target object, determining the energy response and fluence-ambient dose equivalent conversion coefficient of the detector in a radiation field of the to-be-measured object, and realizing simultaneous measurement of a neutron counting rate, a fluence rate and an ambient dose equivalent rate; and the requirements of carrying out radiation dose field monitoring while carrying out quantitative analysis on the to-be-detected object in a special scene are met. The technical scheme of the invention can be popularized and applied to fixed-point monitoring of a to-be-detected system with known or measurable nuclear material source item composition and isotope abundance in nuclear facilities, or retention volume analysis and radiation dose measurement before transfer or treatment of some equipment for treating nuclear materials.

The application discloses an atmospheric turbulence simulator, which comprises a light source, a target, a first lens unit, a light splitting unit, a spatial light modulator, a first diaphragm unit, a second lens unit and a detector. The light beam generated by the light source passes through the target, becomes a parallel light beam through the first lens unit, is transmitted through the light splitting unit again, is reflected by the spatial light modulator and the light splitting unit again, enters the first diaphragm unit to be limited in diameter, is changed into an image square telecentric light beam through the second lens unit, is focused on the detector to form an image, and the detection of the target in different atmospheric turbulence environments is realized. The atmospheric turbulence simulator provided by the application has robustness, can realize the change of atmospheric conditions and the change of propagation distance, and thus makes the system device more flexible and practical.

The invention discloses a cotton impurity detection device based on transmission imaging, which belongs to the technical field of cotton detection and comprises a complete machine support, a sample fixing unit, an optical imaging unit and a lifting driving mechanism. The whole machine support is composed of a base and a guide rail frame and provides a stable supporting platform. The sample fixing unit is located on the front side of the guide rail frame, and uniform clamping and light-transmitting fixing of a sample are achieved through cooperation of a glass substrate and a glass cover plate. The optical imaging unit comprises a lower light source assembly and an upper imaging assembly, the light source assembly emits uniform and parallel light beams to penetrate through a sample, and the imaging assembly collects a transmission image; the lifting driving mechanism is connected with the imaging assembly and drives the imaging assembly to vertically move along the guide rail frame so as to meet the imaging requirements of samples with different thicknesses. The device is reasonable in structure and convenient to operate, can realize efficient, accurate and non-destructive detection of cotton impurities, and has good applicability and popularization value.

The invention relates to the technical field of equifrequency diagram measurement, in particular to a light field equifrequency diagram and frequency space scanning measurement system and measurement method.The system comprises a light source, a first focusing lens and a beam splitter which are arranged in the Y-axis direction; the collimating lens is arranged opposite to the beam splitter and is arranged in the Z-axis direction which passes through the center of the beam splitter and is vertical to the Y-axis direction; the second focusing lens is arranged opposite to the beam splitter and is arranged on one side, far away from the collimating lens, of the beam splitter along the Z-axis direction; the camera is arranged opposite to the second focusing lens and is arranged on the side, away from the beam splitter, of the second focusing lens in the Z-axis direction; and the rotatable optical filter is arranged between the first focusing lens and the collimating lens. The collimating lens is used for converting passing light beams into parallel light beams in all directions, so that the optical filter which is rotationally adjusted plays a role in the parallel light beams, it is guaranteed that all light rays for imaging are adjusted to the same degree, and therefore the uniform and consistent frequency selection and adjustment effect is obtained.

This invention discloses a high-precision liquid refractive index detection system and method, comprising a laser, a transparent substrate, a convex lens, a prism sample cell, and a spot detection unit. The laser emits visible light in parallel beams. The transparent substrate is used for photolithographic printing of a computational hologram, the original image of which is a pure black background containing a one-pixel-wide white vertical line. The convex lens images the object light wave reconstructed from the obtained computational hologram, resulting in a line spot optical reconstruction image. The prism sample cell holds the liquid to be tested. The spot detection unit is positioned on the image plane of the convex lens and is used to detect the pixel position at the center of the line spot reconstruction image. By analyzing the pixel position at the center of the line spot reconstruction image detected by the spot detection unit, the refractive index of the liquid to be tested in the prism sample cell can be measured. This application features a simple structure, convenient operation, low cost, and high detection sensitivity and accuracy.

This invention provides a three-dimensional detection system for lubricating oil abrasive particles based on a phase-shifting micromirror, comprising: a light source system, a beam splitter, an abrasive particle imaging system, a phase modulation system, and a detection system; the light source system emits a parallel beam that is incident on the beam splitter; the beam splitter divides the parallel beam into two identical transmitted beams and reflected beams; the reflected beam passes through the abrasive particle imaging system and is incident on the oil abrasive particle detection area, generating a scattered beam that returns to the beam splitter along the original path; the transmitted beam is modulated by the phase modulation system to form a reference beam that returns to the beam splitter along the original path; the reference beam and the scattered beam interfere at the exit position of the beam splitter, forming an interference beam that is then incident on the detection system to obtain interference spectrum information; the amplitude and phase information of the cross-correlation term in the interference intensity expression are extracted from the interference spectrum information to construct a complex function of the interference beam signal, and then a Fourier transform is performed on the complex function to finally obtain a clear three-dimensional reconstructed image of lubricating oil abrasive particles.

The detection system comprises a condensation gun barrel, a gas supply port and a cold head, the cold head is used for reducing the temperature of the pipe wall of the condensation gun barrel, the gas supply port continuously injects raw material gas into the condensation gun barrel, the raw material gas forms a condensation ice layer, a parallel surface light source is arranged at the front end of the condensation gun barrel, and the parallel surface light source is connected with the condensation gun barrel. The parallel surface light source is a visible light laser with the wavelength range of 375nm-940nm, an array type photodiode is arranged at the rear end of the condensation gun barrel, the parallel surface light source emits linear and surface light beams, and the light beams are transmitted in the condensation gun barrel and are received by the array type photodiode. The invention also provides a detection method. The light source generates parallel light beams in front of the condensed ice layer; the light beam is received by the receiver array after penetrating through the condensation ice layer, and whether the condensation projectile is formed or not is judged by judging the intensity of the light received by the receiver array. According to the invention, the molding process of the condensation projectile can be detected in the whole process, the detection accuracy is improved, and artificial judgment and intervention are reduced.

The present disclosure describes a microscope illumination light path, comprising a sleeve assembly with a light source and a field diaphragm, a lens barrel assembly with a condenser lens and an aperture diaphragm, a light splitting chamber with a rotating disc, a tube lens and a microscope objective, the light source is configured to form a first parallel light beam entering the lens barrel assembly via the field diaphragm, the aperture diaphragm is arranged at the focal plane of the condenser lens, the tube lens is configured to make the parallel light beam entering from the tube lens reach the rotating disc and form a preset image on the rotating disc, wherein the first parallel light beam enters the light splitting chamber via the lens barrel assembly and forms a light spot on the rotating disc covering the small hole surface of the rotating disc, the field diaphragm and the object focal plane of the microscope objective are in conjugate relationship. According to the present disclosure, a microscope illumination light path which is easy to operate and can be easily and accurately adjusted can be provided.

The invention provides an in-hole laser parallel processing device and method, relates to the field of laser processing, and aims to solve the problems of low in-hole structure processing efficiency and low in precision in existing laser processing, a single beam of laser is divided into multiple beams of parallel laser for simultaneous processing, and the processing efficiency can be doubled compared with that of a traditional single-point scanning mode. A plurality of feature points can be formed through one-time processing, so that the overall processing time is greatly shortened; each laser beam is provided with an independent condensing lens in one-to-one correspondence, so that the laser energy of each processing point can be accurately focused, the problems of aberration and the like possibly caused by using a single large lens are avoided, and the processing quality and precision of each point under parallel processing are ensured; a parallel beam splitting system which is complex in function and large in size is arranged outside a hole, only a reflector which is relatively simple in structure and a compact condensing lens array extend into the hole, and the problem that a complex optical system is integrated in a limited hole cavity is solved by adopting the design that the interior and the exterior are separated.

The utility model discloses a small -size pipe fitting inner wall laser rust cleaning device, laser emission module emits laser beam, and parallel light beam is converted through laser collimation module and forms, and parallel light beam passes through off -axis parabolic mirror, and reflection light will converge in focal point position, through design mirror positioning movement module, make its focal point position just be in small -size pipe fitting inner wall, according to the size selection suitable focal length's off -axis parabolic mirror of small -size pipe fitting diameter, also can according to small -size pipe fitting to customize off -axis parabolic mirror, adopts pipe fitting positioning rotation module to position small -size pipe fitting and control its rotation, and then through mirror positioning movement module control off -axis parabolic mirror left and right slide, to realize to small -size pipe fitting inner wall high -efficient, accurate, environmental protection cleaning. When the specific application, also can adopt small -size pipe fitting left and right slide, off -axis parabolic mirror rotation mode cleaning.

The application discloses a phase screen-based array photonic orbital angular momentum beam quantum control system, and belongs to the technical field of quantum control.The application is used for solving the problem of mutual overlapping and interference among sub-beams of an array photonic orbital angular momentum beam.The application comprises a laser, a beam shaping unit, a polarization control unit and a quantum state control unit;the beam shaping unit is used for spatially filtering and expanding a laser beam generated by the laser to generate parallel light beams;the polarization control unit is used for performing polarization control on the parallel light beams output by the beam shaping unit to generate linearly polarized light beams with horizontal polarization states;the quantum state control unit is used for performing array photonic orbital angular momentum control on the linearly polarized light beams to obtain array photonic orbital angular momentum light beams, and each sub-beam in the array is independent;and the application can be used for generating array photonic orbital angular momentum light beams with independent sub-beams through a compact optical path.

The present disclosure provides an optical waveguide structure, including: at least two layers of optical waveguides; a coupling-in grating configured to allow received parallel light beams to enter the optical waveguides, the parallel light beams being propagated in the optical waveguides in a total-reflection manner at a first propagation step; a beam splitting structure configured to allow a first part of light beams to be reflected in such a manner that the first part of light beams are propagated at a second propagation step, and allow a second part of light beams to be transmitted in such a manner that the second part of light beams are propagated at the first propagation step, the second propagation step being different from the first propagation step; and a coupling-out grating configured to extract the light beams propagated in total-reflection manner in the at least two layers of optical waveguides.