33516 results about "Light beam" patented technology

A non-contact temperature measurement system for calculating estimated core body temperature is disclosed. The temperature measurement system can include a sensor that can detect the temperature of a patient and the temperature of ambient surrounding. The temperature of the patient and the ambient temperature can then be used to determine a core body temperature. The temperature measurement system includes an optical module having a light emitter and a light detector. The light emitter emits a beam of light towards the patient and the light detector detects a beam of light reflected by the patient. The reflected beam is analyzed to determine a distance between the temperature measurement system and the patient.

The invention relates to the technical field of laser control, in particular to a high-power fiber laser stable output control method and system. The method comprises the following steps: monitoring a multi-mode sensing signal of an optical fiber laser in real time based on an optical fiber sensor array; performing dynamic optical fiber sensing change analysis on the multi-mode sensing signal of the optical fiber laser to generate a dynamic optical fiber sensing change characteristic; laser output phase distribution analysis is carried out on the dynamic optical fiber sensing change characteristics, real-time power feedback adjustment is carried out, and a dynamic light beam power feedback adjustment strategy is constructed; overheat power unbalance analysis is carried out based on a fiber laser multi-mode sensing signal, and local temperature control power fine tuning is carried out, so that a local temperature control power fine tuning strategy is constructed; and performing sensor position calculation on the optical fiber sensor array one by one, and performing nonlinear optical effect analysis to generate nonlinear optical effect characteristics. According to the invention, efficient and stable laser output control is realized.

Systems and methods for evaluating the physical and / or cosmetic condition of electronic devices using machine learning techniques are disclosed. In one example aspect, an example system includes a kiosk that comprises an inspection plate configured to hold an electronic device, one or more light sources arranged above the inspection plate configured to direct one or more light beams towards the electronic device, and one or more cameras configured to capture at least one image of a first side of the electronic device. The system also includes one or more processors in communication with the one or more cameras configured to extract a set of features of the electronic device and determine, via a first neural network, a condition of the electronic device based on the set of features.

The present disclosure relates to the technical field of optics, and particularly relates to an optical lens and an electronic device. The optical lens of the present disclosure comprises an aperture stop and a plurality of lens units which are sequentially and coaxially arranged from an object side to an image side; a plurality of lens units are provided on the side of the aperture stop facing the object side, forming a stop front lens unit group; a plurality of lens units are provided on the side of the aperture stop facing the image side, forming a stop rear lens unit group; the number of lens units of the stop front lens unit group is the same as the number of lens units of the stop rear lens unit group, symmetrically offsetting distortion, thereby facilitating reduction of optical distortion of the optical lens; and the stop front lens unit group has negative refractive power, the stop rear lens unit group has positive refractive power, and the stop front lens unit group and the stop rear lens unit group form aberration compensation to improve the imaging performance of the optical lens. The lens unit closest to the object side has positive refractive power to converge large-angle off-axis beams, achieving a large field of view angle of the optical lens and reducing a clear aperture of an optical path at the same time, thereby achieving miniaturization of an optical path structure.

The invention discloses a dissimilar metal laser welding device based on swing light beams and molten pool state monitoring. The dissimilar metal laser welding device aims at improving the welding quality and the joint stability. The device comprises a laser welding head with a light beam swinging function, and the laser welding head can implement nonlinear energy scanning in a welding area according to a preset track type, frequency and amplitude; the acquisition module can synchronously acquire a visual image, an excitation spectrum and an infrared thermal imaging signal of the molten pool at a high frame rate, and extracts interface diffusion and metal mixing characteristics through multi-modal fusion; the calculation module performs dynamic feature modeling according to the collected physical feature information and the swing parameters, and quantifies multi-dimensional state indexes of the welding quality; the control module carries out combined adjustment on the laser power, the welding speed and the swing parameters according to the state indexes, closed-loop feedback control is constructed, and therefore real-time stable regulation and control and defect suppression in the dissimilar metal welding process are achieved.

The invention relates to the technical field of spatial positioning, and discloses a spatial positioning method based on multi-modal visual fusion. According to the method, mutual calibration among a laser radar, a short-focus camera and a long-focus camera is realized through a sensor joint calibration algorithm, a spliced image acquired by a bifocal lens of a # imgabs0 # angular color camera is processed, image data in an electric power operation scene shot by a joint calibrated camera system is read, the image is preprocessed, and the image data is acquired. Target detection is carried out on the preprocessed image through a deep learning method, identification and positioning of a target object are realized, a laser radar emits a laser beam to detect the target to obtain data, point cloud data are processed in combination with a visual program, and point cloud mapping, fitting reconstruction and position calculation are carried out on image information obtained by a # imgabs1 # angular color camera, so that the target object is identified and positioned. By means of the method, the precision of power operation complex scene space positioning is improved, and the position detection and recognition error is controlled to be 10 mm or below.

A chip package includes a housing, one or more electrical connections coupled to an exterior of the housing, a photonic integrated circuit, and a scanning unit. Both the photonic integrated circuit and the scanning unit are disposed within the housing. The photonic integrated circuit has at least one waveguide designed to guide a beam of light. The scanning unit is designed to laterally scan the beam of light across a focal plane outside of the housing. The scanning unit is aligned with the photonic integrated circuit such that the beam of light is coupled between the photonic integrated circuit and the scanning unit.

Methods, devices, and computer-readable media are provided that enable a reconfigurable intelligent surface (RIS) to shape a beam being redirected by the RIS for robustness whether the RIS is integrated at a transmitter, such as a base station or a user equipment (UE), or the RIS is a separate entity from the transmitter. An example method includes beamforming the signal to be transmitted, the beamforming comprising applying beam coefficients to a transmitter. The example method further includes determining configuration information for a reconfigurable intelligent surface (RIS) enabling modification of the signal that impinges on the RIS. The configuration information for the RIS pertains to beam direction, beam shape, and beam robustness of the redirected beam.

The invention provides a multi-layer optical film detection method, device and equipment and a storage medium, and the method comprises the steps: obtaining a polarization phase difference signal of transmission light and reflected light through multi-angle incidence irradiation of a multi-band programmable laser source, and recording the polarization ellipticity parameter change; then combining confocal microscopic interference and polarization analysis to determine a space coordinate and a stress distribution diagram of a stress abnormal region; continuously irradiating in a photo-thermal coupling environment through a broadband light source, and monitoring interference signals, polarization states and temperature changes to obtain dynamic evolution characteristics; and finally, performing a simulation test on the multi-layer optical film in a system environment with preset optical axis arrangement and light beam energy distribution, obtaining an in-situ polarization state and interference pattern data, and evaluating the optical performance of the film layer. According to the invention, potential defects can be positioned under high resolution, and the reliability and imaging quality of the film layer under complex application conditions can be accurately evaluated.

A method for quality inspection of an etching paste material based on a spectral response difference, including: identifying a position of density mutation boundary through spectral collection and density gradient analysis. Applying a specific frequency beam to obtain the resonance response parameter, generating stress field reconstruction data. Performing a reverse optical tracking to obtain a defect formation path, generating degradation prediction data. Establishing a self-organizing optical monitoring grid, to form a hierarchical spectral fingerprint library. Constructing a multi-point linked defect blocking network, to form an interconnected optical energy field. Monitoring a cooperative response to obtain network stability data, Identifying abnormal position coordinates based on a material quality grade and the network stability data, obtaining the abnormal position coordinates. Performing a phase adjustment to obtain a phase difference spectral set, conducting a phase comparison marking on the abnormal position coordinates, completing the quality inspection of the etching paste material.

A broadband omni-directional bicone antenna. The antenna can comprise conductive surfaces of conical voids provided within a solid dielectric structure. The outside surface of the solid structure can support a radio frequency (RF) lens geometry operable for beam forming. The beam forming can modify the elevation pattern of the electromagnetic radiation from the bicone antenna. The solid dielectric structure may be machined or molded from a single piece of material. The conical voids provided within the solid structure can be metallized to provide conductive bicone radiators. The outer surface beam shaping lenses can be zoned or continuous and can provide elevation patterns with increased gain, cosecant squared falloff, or various other patterns. The beam shaping lens may be formed from any low-loss dielectric. Alternatively, the lens may be formed from a less dense material such as dielectric foam that can support radial conductive beam forming vanes.

The invention relates to the technical field of filter films, and discloses a filter film thickness detection device and a detection method. The method comprises the following steps: acquiring a first parallel beam, a second parallel beam and a third parallel beam; fixing a to-be-measured filter film sample on a sample table, and measuring the to-be-measured filter film sample to obtain a reflection spectrum and an initial refractive index parameter; irradiating the to-be-measured filter film sample by using the first parallel light beam, the second parallel light beam and the third parallel light beam, dividing the measurement area into a plurality of sub-areas according to the initial refractive index parameter, and fitting by using a least square method to obtain the optimal thickness value and refractive index value of each sub-area; based on the optimal thickness value, the refractive index value and the reflection spectrum, a mapping relation between the spectral reflectivity and the thickness is established, and a target thickness distribution diagram is obtained through iterative algorithm solving and error compensation calculation. According to the invention, the problem of uneven measurement of the thickness of the large-area filter film is solved, and the precision, efficiency and reliability of thickness detection of the filter film are remarkably improved.

The invention discloses a full-automatic laser welding forming system, which relates to the technical field of laser welding, and comprises a laser generation and light beam modulation module, a material conveying and positioning module, a welding execution module, a visual inspection and monitoring module, an intelligent self-adaptive control module and an energy recovery and reutilization module, the material module accurately conveys and positions materials; the welding module robot is accurate in operation; the visual module detects welding seams; the intelligent module performs self-adaptive control; the energy module recycles energy. The welding quality is improved, and defects are reduced; the production efficiency is improved and the cost is reduced; operation is simple, and manpower requirements are reduced; energy is saved, environment is protected, and green concept is met; real-time monitoring is achieved, and the product quality and the management level are guaranteed.

A computer-implemented system and method for pupil-directed retinal projection in near-eye displays are disclosed. The computer-implemented system provides smart glasses with directed physical pixels that project light beams / signals directly onto a user's retina based on pupil position and size. The glasses comprise a frame, lenses with directed pixel layers, and sensors for tracking pupil movement. Each directed pixel may generate multiple virtual pixels by rapidly changing its emission angle. The glasses function as prescription lenses, virtual reality displays, and augmented reality devices without traditional optical systems. Additional features include depth sensors, cameras, and connectivity to peripheral devices. The glasses enable a seamless blend of virtual and real-world experiences, creating an immersive “Mixverse” environment. Various input methods, including gesture recognition and brain-computer interfaces, allow for intuitive control and interaction.

The invention discloses a light spot real-time monitoring and feedback focusing system and method for laser processing. The system comprises a laser processing module, an emission light source module, a power monitoring module, a light spot monitoring module and an automatic control module. The emitting light source module is used for emitting laser beams; the power monitoring module is used for monitoring the laser power emitted by the emitting light source module; the light spot monitoring module is used for monitoring light spots of diffuse reflection light after the laser is emitted to the surface of the workpiece; the automatic control module sets reference signals of the following parameters: processing laser power and shape, position and size of a processing light spot; and according to the reference signal and the corresponding feedback signal, the laser emission parameter and the laser incident workpiece surface parameter are automatically adjusted, so that the error between the reference signal and the corresponding feedback signal is within a set precision range. According to the method, the light spot form and the light intensity in the machining process are dynamically monitored, and the light spot form and the energy in the laser machining process are adjusted in real time through feedback.

A LiDAR apparatus, including: a laser to generate an optical signal; modulation components configured to receive the optical signal as an input and to output at least two corresponding modulated optical signals at respective output ports, wherein each modulated optical signal is modulated by a corresponding pseudo-random bit sequence, and: (i) the optical signals have respective different delays such that the modulations do not overlap in time; or (ii) the pseudo-random bit sequences have low cross-correlation; for each of the at least two modulated optical signals, a corresponding optical transmitter configured to transmit the corresponding modulated optical signal towards a corresponding surface spaced from the LiDAR apparatus by a corresponding distance, and a corresponding optical receiver configured to receive a portion of the transmitted optical signal scattered and / or reflected by the surface, the received portion of the optical signal having a phase shift and / or Doppler shifted angular frequency due to radial motion of the LiDAR apparatus relative to the surface; at least one photodetector to receive the optical signals received by the optical receivers, interfered with a reference beam, and to generate a corresponding output signal; at least one analogue to digital converter to generate a digital signal representing the output signal from the at least one photodetector; and a digital signal processing component configured to process the digital signal to generate LiDAR data representing the distances to the surfaces and / or relative velocities of the surface(s) with respect to the apparatus.

A laser welding nozzle includes: a beam guide member allowing a laser beam to pass therethrough and having a diameter that decreases toward a lower end thereof, with a beam discharge port formed at the lower end to have a smallest diameter; and a housing coupled to the beam guide member in such a manner that an inner surface of the housing faces an outer surface of the beam guide member to form a shielding gas line outside the beam discharge port and form a suction line connected to the beam discharge port.

Head-mounted displays with waveguides comprising superimposed diffractive gratings and methods for fabricating said waveguides are described herein. In an embodiment, a head-mounted display comprises an optical element and an image source that provides an image beam to an optical element. The optical element comprises two gratings superimposed over each other, at least one of which comprising a buried diffractive grating. The buried diffractive grating comprises a high-refractive index material interspersed with a low-refractive index material or non-solid pockets, such as gas, air or vacuum. Light diffracted by a first of the two gratings is further diffracted by a second of the two gratings without interacting with a surface of the optical element between diffractions.

The invention relates to the technical field of precision detection, in particular to a device and a method for nondestructive testing of a wafer surface. The device provided by the invention comprises a detection light path, a motion control module, a narrow channel detection end, a wide channel detection end and a data acquisition and processing module, the motion control module is used for bearing a to-be-tested wafer and adjusting the position; the detection light path comprises an incident light path, a wide-channel light path and a narrow-channel light path; the incident light path is used for projecting a light beam and vertically projecting the light beam to a wafer to be measured; the narrow channel light path is used for collecting scattered light with the diffusion angle of [5 degrees, 24 degrees] generated on the surface of the wafer to be detected and gathering the scattered light to the narrow channel detection end, and the wide channel light path is used for collecting scattered light with the diffusion angle of [25 degrees, 70 degrees] generated on the surface of the wafer to be detected and gathering the scattered light to the wide channel detection end. According to the device for nondestructive testing of the surface of the wafer, the detection light is vertically incident, the detection light can be reflected out along the original path when the wafer is qualified, and only the defective wafer can generate scattered light, so that the wafer defect can be quickly and accurately identified. According to the wafer defect detection method, the defects of high cost, low precision and high operation difficulty of a wafer defect detection method in the prior art are overcome.

The invention discloses a focusing objective lens and a machining head of dual-band micro-jet laser equipment, and belongs to the field of micro-jet laser equipment, the focusing objective lens is applied to the machining head of the dual-band micro-jet laser equipment, the machining head comprises a water cavity and a spray head, the spray head comprises a spray hole, and the focusing objective lens, the water cavity and the spray head are sequentially arranged in the optical axis direction of the focusing objective lens. The focusing objective lens is used for focusing the dual-band light beams into the water cavity and the spray hole, and the focusing objective lens comprises a biconcave negative lens group, a biconvex positive lens group and a meniscus positive lens group which are coaxially arranged in sequence; the double-waveband light beam enters the biconvex positive lens group after being diverged by the biconcave negative lens group, enters the meniscus positive lens group after being converged by the biconvex positive lens group, and enters the spray hole after passing through the water cavity after being converged by the meniscus positive lens group, so that the processing quality and the processing efficiency of laser processing can be improved.

The invention discloses a continuous zooming laser interference end point detection system, which is used for semiconductor etching and thin film process end point detection, and comprises an illumination module, a laser interference module and an imaging module, the laser interference module comprises a laser, a beam splitter, a beam splitting cube, a lens and a detector, a laser beam emitted by the laser passes through the beam splitter, the beam splitting cube and the lens and then is focused to a to-be-detected area on the surface of a wafer, and the surface of the wafer reflects the laser to the detector for detection; the focal length of the lens is continuously adjustable; the illumination module comprises a light source which is arranged on one side of the lens, and an illumination light beam emitted by the light source is used for illuminating a to-be-detected area on the surface of the wafer; and the imaging module comprises a camera which is arranged on one side of the lens and is used for recording and outputting image information of a to-be-detected area on the surface of the wafer. According to the invention, through continuous zooming and large numerical aperture of the lens, high-definition imaging and etching of a long working distance and accurate detection of a thin film process end point are realized.

The invention discloses a femtosecond laser etching method and system for a perovskite thin film, and relates to the technical field of semiconductor processing, and the system comprises a laser light source module which is used for generating a femtosecond laser pulse which is high in repetition rate and adjustable in laser power, frequency and beam spread angle; the optical path control module is provided with an optical element group, an optical element alignment system, a beam shaper and a self-adaptive optical element, and is used for adjusting the path, focusing and energy distribution of the laser beam; wherein the adaptive optical element comprises an adjustable deformable mirror and a liquid crystal spatial light modulator. According to the femtosecond laser etching method and system for the perovskite thin film, by combining real-time wavefront monitoring, distortion correction and an optical element driving system, the stability and consistency of an optical path are ensured, and the problem that etching consistency and uniformity are difficult to maintain on a large-area thin film through a traditional etching method is solved; and the performance of the device is unstable and reduced.

The invention provides an intelligent control method for a floodlight illumination system, and the method comprises the steps: obtaining an environment surface roughness coefficient, spectral reflection distribution and spatial geometric change data, determining the wall surface material absorptivity and shielding region coordinates, and obtaining environment reflection characteristics and shielding distribution data; analyzing shielding boundary sharpness and shielding angle distribution according to the spatial geometric change and the coordinates of the shielding area, calculating a luminous flux distribution curve of a local dark area, and judging whether the influence range of the dark area exceeds a preset threshold range or not; calculating the illumination coverage integrity according to the updated light field distribution and polarization reflection characteristics, determining the boundary sharpness of a light beam, and obtaining a light field uniformity parameter; and according to the light field uniformity parameter and the shielding thermal radiation effect, calculating and optimizing light field parameters.

The invention relates to the technical field of acetylene cracking furnace production monitoring, and particularly discloses a CO laser detection system based on a thermal radiation background, which is used for solving the problem that an existing monitoring system is difficult to accurately distinguish CO and water vapor signals because thermal radiation and water vapor generated by high temperature in an existing ethylene cracking furnace interfere infrared absorption measurement of CO. Comprising a quantum cascade laser, a pyroelectric detector, a data processing unit and a signal analysis module, a reference light intensity adjusting module utilizes temperature, humidity and pressure data obtained by an environment parameter sensing module in real time to adjust the CO absorption coefficient through an environment correction factor, the reference light intensity is dynamically calculated and corrected according to the reference light intensity, and the signal analysis module analyzes the signal. The data processing unit is used for dynamic correction of CO concentration monitoring; a CO signal is effectively extracted under a thermal radiation background through a quantum cascade laser and a light beam modulation technology, environment correction and real-time monitoring are combined, CO concentration abnormity is accurately recognized, early warning is given out, and the monitoring sensitivity and reliability are improved.

A pest control system is disclosed comprising an optical, computational, and monitoring subsystem, optionally mounted on a mobile platform. The optical system may include a neutralizing laser or multi-wavelength light source, discovery and detail cameras (optionally stereo), a beam-steering mechanism, tunable focus, and optional thermal or depth sensors. The processor, such as a GPU or FPGA, identifies insect or biological targets, adjusts laser focus by depth, and controls beam activation. A monitoring system verifies safety by detecting humans or other non-target entities using environmental and thermal cameras; if detected, laser firing is inhibited. The mobile platform may use wheels, propellers, tracks, or cables, with GPS and data links for remote control. A visible light pre-flash may induce a blink reflex before firing. In some embodiments, a scouting drone transmits target coordinates to the neutralization unit, enabling coordinated, efficient, and safe laser-based pest control.

The invention provides an LED lamp intelligent energy-saving control method and system, and the method comprises the steps: obtaining environment illumination intensity data, personnel flow density data and current working state parameters of an LED lamp, which are collected by a plurality of sensors, carrying out the preprocessing of the original data of the sensors, and obtaining a standardized environment perception data set; calculating power resources required by the intelligent control system are evaluated according to the LED lamp control parameter optimization scheme, the brightness output of the LED lamp is controlled according to the calculating power resources, and the current proportion of red, green and blue LED chips is adjusted according to the color temperature; whether the light beam angle needs to be adjusted or not is judged through matching analysis of the light beam angle and environmental perception data, if yes, the lens position of the LED lamp is changed, and the output spectral characteristics of the LED lamp are measured and determined through a spectrum analyzer; after sensor calibration parameters are updated, LED lamp power consumption data are collected, and if the deviation between actual power consumption and a theoretical calculation value is smaller than a preset percentage, it is determined that the energy-saving control effect reaches an expected target.

The invention provides a transmitting-receiving coaxial laser radar optical system, and relates to the technical field of laser radars. The optical system comprises a transmitting assembly, a polarization splitting prism, a quarter-wave plate, a common beam expanding lens group, a micro-lens array, a common lens and a receiving assembly which are arranged in sequence. Laser emitted by the emitting assembly enters the polarization splitting prism, and at the moment, a light beam is linearly polarized light, can pass through the polarization splitting prism and then pass through the quarter-wave plate to reach the shared beam expanding lens group to be collimated and expanded, and finally is emitted for illumination through the micro-lens array and the shared lens; the emergent laser beam is irradiated to an object to return an optical signal, and the returned optical signal is returned to the polarization splitting prism along an original optical path and is reflected into the receiving assembly to be received and processed; according to the invention, the beam splitter prism, the beam expander group and the micro lens array are shared, and the shared lenses are the same and share the lens group, so that the purpose of saving the manufacturing cost of the laser radar is achieved; the method is suitable for automobile automatic driving, distance detection and the like.

The invention belongs to but not limited to the technical field of blind hole machining, and discloses a process method and system for laser composite efficient precision machining of blind holes, and the process method comprises a laser hole prefabricating stage and a laser fine hole repairing stage; a hole is preformed in the punching position of a workpiece through a large-pulse-energy laser beam, and fixed-point materials of the workpiece are rapidly removed; and then the hole is finely trimmed through ultra-short pulse width laser, the incident angle direction of a laser beam and the surface of the material is changed through a rotary cutting system, the hole wall and the hole bottom of the hole after the pre-hole stage are trimmed, fine trimming of the blind hole is completed, and the high-precision blind hole with the controllable taper is obtained. The method comprises the following steps: quickly removing a prefabricated blind hole in a workpiece material by using large pulse energy laser; adjusting process parameters, and quickly pre-processing a blind hole with a certain depth in a workpiece; and then the hole wall and the hole bottom of the blind hole are trimmed through high-speed rotating light beams and variable light beam incidence angles of the rotary cutting system, smooth hole wall, flat hole bottom and controllable taper of the blind hole are achieved, and the machining quality and efficiency of the blind hole of the difficult-to-machine material are improved.

The invention relates to a light path system for forming point ring light spots and a laser processing device. The light path system comprises a first light source, a first collimating lens, a first conical lens and a reflecting mirror which are arranged in the first linear direction. The second light source, the second collimating lens, the focusing lens and the second conical lens are arranged in the second linear direction, the reflecting mirror is located between the second collimating lens and the focusing lens, and the center of the reflecting mirror and the center of the second conical lens are each provided with a through hole allowing a second light beam emitted by the second light source to penetrate through; a first light beam emitted by the first light source passes through the first collimating lens and the first conical lens and then is reflected by the reflector, and the reflected first light beam sequentially passes through the focus lens and the second conical lens and then forms an annular light spot at the focus of the focus lens. A second light beam emitted by the second light source sequentially passes through the second collimating lens and the focus lens and then forms a point light spot located in the center of the annular light spot at the focus of the focus lens. The composite light spot of the center point light spot and the outer ring light spot can be formed, the structure is simple, and the manufacturing cost is low.