168 results about "Optical beam deflection" patented technology

A Rydberg atom television receiver is disclosed. The receiver comprises a probe laser, a source polarizing beam displacer, a Rydberg atom receiver cell, receiver atoms, a detector polarizing beam displacer, a detector polarizing beam cube, a first photodiode, a second photodiode, a differential amplifier, a display, and a coupling laser. The receiver receives a modulated waveform imprinted on a radiofrequency carrier a displays a graphical representation corresponding to a modulation source.

The invention provides a laser welding method for an unequal-thickness heterogeneous hot-formed steel joint by cooperatively regulating and controlling annular light spots and light beam deflection. The method comprises the following steps: firstly, pretreating, clamping and positioning the PHS1500 and PHS2000 unequal-thickness ultrahigh-strength steel plates; then, the deflection angle of the light beam is adjusted to be within the range of-30 degrees to + 30 degrees; and finally, a galvanometer control system is used for driving a laser beam to conduct swing scanning in a circular track, and welding is completed under the condition that parameters such as laser power, welding speed, swing frequency, the ratio of swing amplitude to core ring energy and the like are set. According to the method, wire filling is not needed, the PHS1500 and PHS2000 butt welding joints can be effectively connected within the light beam deflection angle range of-30 degrees to + 30 degrees, efficient connection can be achieved within the light beam deflection angle range of-20 degrees to + 20 degrees, weld joint forming is effectively improved, weld joint grains are refined, and the problems of stress concentration and welding softening areas caused by different thicknesses and different strengths of plates are solved. And within the light beam deflection angle range of-20 degrees to + 20 degrees, the obtained joint welding seam is well formed, the tensile strength can reach 1400 MPa or above, and the method is suitable for manufacturing the tailor-welded structure of the unequal-thickness plates of the automobile body.

The invention relates to the technical field of laser welding, and particularly discloses a laser welding device for instrument processing, which adopts double stations with separated pre-clamping and processing, an operator can assemble and disassemble a workpiece at one station and simultaneously perform welding at the other station, so that the waiting time is obviously reduced, and the working efficiency is improved. A linkage clamping mechanism is used for ensuring that a workpiece is kept stable in the rotating switching process and is automatically converted into a high-locking-force state after reaching a machining station, the risk that the workpiece is turned over in traditional equipment is avoided, continuous, efficient and safe operation is achieved, and the device integrates the optical path adjusting and cleaning functions for the pollution problem of an optical system, so that the production efficiency is improved. When the laser angle is adjusted, the scraping strip is synchronously driven to remove pollutants on the light-transmitting plate, the maintenance period is prolonged, the stable welding quality is guaranteed, in addition, laser beam deflection is achieved through a worm and gear and a reflector structure, obstacles can be bypassed to weld hard-to-reach areas such as deep cavities and corners, the process of disassembling and reassembling is avoided, and the production integrity and efficiency are improved.

The invention discloses a moving target identification and tracking system based on an analog micromirror array (AMA), belongs to the technical field of photoelectric tracking and machine vision, and aims to solve the technical problems of slow response, large inertia and complex structure of a traditional mechanical tracking system. According to the technical scheme, an AMA composed of a plurality of MEMS micromirror units which can be independently controlled and have the static or quasi-static two-dimensional deflection capacity is adopted as a non-mechanical light beam deflection actuator, the AMA can be composed of micromirror arrays in various forms, digital image data are analyzed in real time to solve the target offset, and the non-mechanical light beam deflection actuator is obtained. And an instruction is generated to drive the AMA to deflect at a high speed so as to compensate the deflection, so that continuous and stable locking and tracking imaging of the moving target are realized. The system has the advantages of being high in response speed, high in tracking precision, free of mechanical inertia and compact in structure, supports flexible switching of various working modes such as wide-area scanning and long-distance tracking, and is high in application flexibility.

The invention discloses a light scanning method, which comprises the following steps that: a first light deflection device deflects an incident light beam by a plurality of first deflection angles, and projects the deflected light beam to a polarization expanding device; the polarization expanding device amplifies the deflection angle of the deflected light beam in the corresponding deflection direction by a preset multiple, and projects the expanded light beam to the corresponding position of the second light deflection device; and the second light deflection device deflects the expanded light beam at a preset second deflection angle so as to project a scanning light beam. The light deflection angle can be continuously and finely adjusted within a larger angle range, and the structure of the light deflection device is miniaturized.

A system for free-space optical coupling between a two-dimensional optical transmitter array and a two-dimensional optical receiver array using planar optical elements includes a transmitter array configured to emit one or more optical beams, a first planar optical element configured to receive the optical beams from the transmitter array and generate one or more intermediate optical beams, a first spacer disposed between the optical transmitter array and the first planar optical element, a receiver array, a second planar optical element configured to receive the intermediate optical beams and generate one or more output optical beams directed to the receiver array, and a second spacer disposed between the second planar optical element and the optical receiver array. The TX and RX portions of the optical coupling system can be used in a LiDAR system as a light emitting element (beam steerer) and a detector, respectively. The planar optical element is configured to provide a wide field of view for the LiDAR.

The invention relates to the technical field of laser drilling, in particular to a real-time monitoring acousto-optic deflection laser drilling system, method, equipment and medium, and the system comprises a laser light source, a power monitoring module, an acousto-optic deflector, a galvanometer, a three-light coaxial device and a control system. The power monitoring module collects a power signal of a machining laser beam in real time, and the control system compares the power signal with a preset threshold value and dynamically adjusts laser output parameters. The three-light coaxial device carries out in-situ imaging on the surface of a workpiece while transmitting laser to obtain a drilling morphology image, and a control system recognizes defects such as fused heap or hole shape distortion based on the image and dynamically adjusts laser machining parameters or light beam deflection parameters. According to the system, through a double-closed-loop feedback mechanism, synchronous regulation and control of laser energy and machining morphology are achieved, and the consistency and precision of micropore machining are remarkably improved.

The utility model provides a laser diagnosis device comprising a first laser light source used for emitting diagnosis laser; the light deflector is connected with the output end of the first laser light source and is used for carrying out light beam deflection at a specific angle on the diagnosis laser; the optical fiber coupler is arranged at the output end of the optical deflector and is used for coupling the diagnosis laser with the deflected light beam into one optical fiber branch of the optical fiber array; the optical fiber array is connected with the optical fiber coupler and is used for transmitting the diagnosis laser coupled by the optical fiber coupler to a focusing microlens of the focusing microlens array; wherein the optical fiber branches in the optical fiber array are mutually independent; the focusing micro-lens array is connected with the optical fiber array and is used for focusing the diagnosis laser on the diseased tissue through a focusing micro-lens to generate a laser signal with tissue characteristic information; wherein each focusing microlens in the focusing microlens array is correspondingly connected with one optical fiber branch of the optical fiber array; the device is compact in structure, easy and convenient to operate and capable of conducting refined diagnosis on diseased tissue.

The invention is suitable for the technical field of laser processing, and provides a laser processing method, a controller, laser processing equipment and a circuit board. The laser processing method comprises the following steps: acquiring a target laser movement track of a to-be-processed workpiece; decomposing the target laser motion track into a first motion component of a first light beam deflection mechanism and a second motion component of a second light beam deflection mechanism; the first target speed of the first light beam deflection mechanism and the initial speed of the second light beam deflection mechanism when the second light beam deflection mechanism enters the second motion component are determined according to the processing point location distribution of the first motion component, and the initial speed is larger than 0; and controlling the first light beam deflection mechanism to execute the first motion component at the first target speed, and controlling the second light beam deflection mechanism to start speed change from the initial speed to a second target speed so as to execute the second motion component. According to the embodiment of the invention, the laser processing efficiency can be improved.

The application discloses a long-focus lens module and electronic equipment, the long-focus lens module comprises an imaging lens and a light beam deflection device; the light beam deflection device is arranged in the imaging light path of the imaging lens and is used for optically compensating a residual offset a still existing after compensation by the anti-shake module; the light beam deflection device comprises an angle or face shape adjustable transmission type optical element; the transmission type optical element is configured to switch from an initial state to a deflection state, and an image height change is caused by angle deflection or face shape change, so that an optical compensation amount of size-a is introduced to offset the residual offset a; in the deflection state, the relationship between the center field of view image height change DeltaIHc, the edge field of view image height change DeltaIHe and the lens magnification x satisfies the relationship formula: 0.07 <= DeltaIHe / DeltaIHc / x <= 0.4. The application introduces the image height change by angle deflection or face shape change of the transmission type optical element, so that the image height change corresponds to the change caused by the body shake, thereby weakening the influence of the body shake on the picture.

The invention discloses a terahertz polarization-independent achromatic beam deflection device and a use method thereof, and belongs to the technical field of terahertz application. The terahertz polarization-independent achromatic beam deflection device comprises a dielectric substrate layer and a dielectric cylinder microstructure layer, wherein the dielectric cylinder microstructure layer is arranged at the top of the dielectric substrate layer; the dielectric cylinder microstructure layer is composed of dielectric cylinder superatoms arranged in an array mode, the dielectric cylinder superatoms are of a sub-wavelength structure, and the distances between the dielectric cylinder superatoms in the adjacent rows and between the dielectric cylinder superatoms in the adjacent columns are all smaller than the wavelength of incident terahertz waves; the dielectric cylinder superatoms and the corresponding substrate form a basic unit of the light beam deflection device. According to the polarization-independent achromatic light beam deflection device, the achromatic effect of any polarization can be achieved within the broadband range of 0.6 THz-1. 2 THz.

This invention provides a beam-deflecting metasurface and a quantum sensor. The beam-deflecting metasurface includes a metasurface array, which in turn includes metasurface units. Each metasurface unit comprises a substrate unit block and a copper ring. In any metasurface array, the outer diameter of the copper ring is uniform. By changing the inner diameter of the copper ring, the transmission phase of the corresponding metasurface unit is altered. The beam-deflecting metasurface of this invention effectively controls the coupling and probe beams frequently used in quantum sensors, preventing the probe beam from being affected by the coupling beam. The overall structure is simple, and the cost of the beam-deflecting metasurface is low, enabling the quantum sensor to have a wide range of applications. Because the copper ring has a symmetrical structure, it is polarization-independent. For both the probe and coupling beams, the transmittance of the beam-deflecting metasurface remains above 90%, ensuring efficient transmission of the required optical signals.

The application belongs to the technical field of laser processing equipment, and discloses a light beam deflection mechanism applied to rapid scanning of a soft ceramic laser drilling and cavity opening equipment, comprising a two-dimensional acousto-optic deflection assembly, a radio frequency driving control system, a precision adjustment fixing assembly, an optical auxiliary assembly and a cooling and heat dissipation assembly, wherein each assembly is cooperatively matched and linked with an equipment galvanometer system and an XY moving platform; after being optimized by the optical auxiliary assembly, a laser beam is incident into the two-dimensional acousto-optic deflection assembly, the radio frequency driving control system is adjusted to realize high-precision and rapid deflection of the light beam, the precision adjustment fixing assembly guarantees positioning accuracy, and the cooling and heat dissipation assembly controls thermal effects. The application realizes 0.1 mu rad deflection accuracy and 1 mu s scanning switching speed, controls the soft ceramic processing thermal effect area within 5 mu m, and can satisfy fine processing of through holes, buried holes, blind holes and <50 mu m micro holes.

The present application relates to a kind of local light beam deflection virtual reality near-eye display optical structure.The structure includes micro display panel, optical imaging lens and light beam deflection superstructure surface.The light beam deflection superstructure surface includes substrate layer and nanostructure unit periodically distributed on the substrate layer, which is divided into different regions according to pixel position and designed differently, forming different deflection angles.The present application can realize the independent regulation of deflection angle of each pixel position, with the characteristics of simple design and wide applicability, which can be applied to VR virtual reality display system.

The application relates to the technical field of visual identification, in particular to a three-dimensional reconstruction device and method based on binocular camera and laser radar fusion under visual guidance, aiming to solve the problem of unstable three-dimensional reconstruction precision of binocular camera and laser radar fusion. The method comprises the following steps: acquiring two-dimensional images of left and right views of a field of view region; if there is a region of interest in the two-dimensional images, the pixel position of the region of interest is extracted, and based on preset calibration parameters and the pixel position, the azimuth angle and the pitch angle of the region of interest relative to the optical axis of the device are obtained; a scanning control signal is generated according to the azimuth angle and the pitch angle, and is output to a light beam deflection scanning unit; distance information of the region of interest is acquired, and a three-dimensional reconstruction model of the region of interest is obtained according to the distance information and the angle information. The three-dimensional reconstruction device and method based on binocular camera and laser radar fusion provided by the application improve the matching stability and reconstruction precision of complex regions such as weak texture, strong reflection and occlusion.

To realize more horizontal / vertical resolution points and higher frame rate than the conventional one.SOLUTION: A light beam deflector comprises: a wavelength variable semiconductor laser 1; a plane optical waveguide circuit 3 that splits light emitted from the wavelength variable semiconductor laser 1 into first number of beams same as the number of areas obtained by dividing an object space in a first direction, and emits the beams so as to select the emission position of the split beams in the first direction so that a position of one pixel in each corresponding area is irradiated with the beams; a dispersive element 5 that deflects the first number of beams emitted from the plane optical waveguide circuit 3 respectively at angles according to wavelengths of the beams in a plane parallel to a second direction perpendicular to the first direction; an optical system 6 that converts the first number of beams emitted from the dispersive element 5 to be parallel to an axis of the optical system; and an optical system 7 that deflects the first number of beams emitted from the optical system 6 to be emitted to the object space.SELECTED DRAWING: Figure 1

The present application relates to the technical fields of laser welding, and discloses a kind of multi-phase laser welding control method and system, including collecting the molten pool radiation image data of multiple wave bands, fusion processing constructs three-dimensional temperature gradient model and extracts three-dimensional dynamic characteristic data, the three-dimensional dynamic characteristic data is compared with the preset model quantization error, generates and includes phase, power and beam deflection collaborative control instruction, the original laser is decomposed into multiple micro-beams and the phase delay of each micro-beam is adjusted, the spatial energy distribution mode of processing plane is dynamically reshaped using spatial interference superposition effect, according to instruction fine-tuning instantaneous input power and executing beam spatial deflection action.The present application eliminates temperature measurement deviation by multi-wave band fusion, uses hardware decoupling matrix to separate control instruction, cooperates with micro-beam interference to dynamically reshape energy distribution, eliminates energy compensation and time lag of beam deflection, improves energy distribution flexibility and response speed, and guarantees welding quality.

The application provides a light spot detection method, a focusing method and a photoacoustic measurement system. The light spot detection method comprises: adjusting a relative optical deflection angle between excitation light and detection light through a light beam deflection module, collecting reflected light of the detection light on a sample surface in real time through a detection module, and generating a signal strength indicating the reflected light; fitting a relationship curve of the signal strength with respect to the relative optical deflection angle; obtaining a first target relative optical deflection angle θ1 and a second target relative optical deflection angle θ2 based on the relationship curve; and calculating an effective light spot size, which is the sum of the size of the excitation light spot and the size of the detection light spot in the direction of relative movement. The method adjusts the relative optical deflection angle between the excitation light and the detection light, fits the relationship curve of the signal strength with respect to the relative optical deflection angle, and then measures the effective light spot size. The photoacoustic measurement system is focused based on the light spot detection method, and further realizes effective and accurate film thickness measurement.

The application relates to a light beam delay correction method and system, the method comprising: an acousto-optic modulation module receiving a laser light beam incident in a first direction and outputting diffracted light; a light beam deflection module receiving the diffracted light and deflecting the transmission direction of the diffracted light so that the diffracted light is incident on the acousto-optic modulation module in a second direction to compensate for the delay generated by the acousto-optic modulation module modulating the laser light beam; and the second direction is opposite to the first direction.

The invention relates to an optical system (10a) for a virtual retinal display having an illumination device (12). The lighting device (12) has a first laser diode (7) for emitting a first light beam (8) in a first wavelength range. The first wavelength range is shifted towards a second wavelength range depending on the temperature of the first laser diode (7). Furthermore, the optical system (10a) has a first controllable deflection unit (9) for the first light beam (8) for the scanning projection of the image content. Furthermore, the optical system (10a) has a holographic optical element (5) for deflecting the first light beam (8) onto the eye (3). The holographic optical element (5) is formed from a liquid crystal and has a first holographic function with a first diffraction efficiency range and a second holographic function with a second diffraction efficiency range. The first wavelength range at least partially overlaps a first diffraction efficiency range and the second wavelength range at least partially overlaps a second diffraction efficiency range. Furthermore, the optical system (10a) has a control unit (11) for actuating the holographic optical element (5) or the polarization switch in such a way as to depend on detected information relating to a first or second wavelength range of the emitted first light beam (8), the holographic optical element (5) is arranged such that a first light beam (8) having a first wavelength and incident on the holographic optical element (5) at a first point in time at a first angle of incidence (15) and a first light beam (8) having a second wavelength and incident on the holographic optical element (5) at a second point in time following the first point in time at the first angle of incidence (15) are deflected onto the eye (3).

The application discloses a device and method for realizing multi-aperture coaxial based on atmospheric illumination backscattering light, which comprises a laser, a transmitting aperture, a detecting aperture and an imaging system; the pulsed laser emitted by the laser enters the transmitting aperture and then passes through a single-aperture telescope, and is shot into the atmosphere after the transmitting direction is adjusted by a light beam deflection scanning device; the detecting aperture is responsible for receiving atmospheric illumination backscattering light at a specified distance and target reflection light reflected from a target; the atmospheric illumination backscattering light from the detecting aperture enters the imaging system and is converged into an imaging camera by a converging lens, and a focused light spot is formed on a target surface of the imaging camera; according to the position of the focused light spot of the imaging camera, a multi-aperture telescope optical axis fine adjustment device of the detecting aperture is adjusted by an algorithm until all the focused light spots are coincided, and the coaxial of the detecting aperture is realized. The technical scheme of the application has the advantages of simple structure, low cost and easy realization.

A beam deflector includes a first electrode layer including a plurality of line electrodes extending in a first direction and arranged parallel to each other in a second direction crossing the first direction; a second electrode layer separated from the first electrode layer by a predetermined distance to face the first electrode layer; and a deflection layer between the first electrode layer and the second electrode layer and having a plurality of optically anisotropic molecules controlled by an electric field formed between the first electrode layer and the second electrode layer. Each of the optically anisotropic molecules has an ellipse shape having a major axis and a minor axis, wherein the major axis is arranged to head for the first direction.

The application discloses a laser powder bed multi-pattern splicing correction system and method based on an amplitude type light valve, relates to the technical field of metal additive manufacturing, and comprises the following in sequence along an optical path: a laser, a beam expanding and collimating system, a homogenizing system, an amplitude type spatial light modulator and a 4f imaging system; a beam splitter, a main beam deflector, an auxiliary beam deflector and a focusing lens group are sequentially connected along the optical path after the 4f imaging system; a global position reference sensor, a mirror and a coaxial monitoring system; and a control system performs sub-field multi-modal calibration, digital pattern pre-deformation, real-time splicing and closed-loop dynamic compensation. The application constructs the laser powder bed multi-pattern splicing correction system based on the amplitude type light valve, combines the sub-field multi-modal calibration, the digital pattern pre-deformation, the real-time splicing and the closed-loop dynamic compensation, takes into account the static nonlinear distortion and the dynamic error, and improves the precision and stability of the powder bed multi-pattern splicing.

The application provides a machining system of an integrated equal-subtract machining diamond integrated device, a spatial light modulator is used as a core module, different phases can be loaded according to different scenes, and internal equal-subtract machining and surface subtract machining of the diamond are realized integrally; wherein, a waveguide adopts an envelope type waveguide structure formed by a modified carbon region induced by a femtosecond laser, and effective mode constraint of a light field is realized through multipoint envelope, and the waveguide is suitable for integrated signal transmission working cooperatively with a surface metasurface structure; the metasurface structure realizes beam deflection machining through loading a phase diagram by the spatial light modulator, the beam deflection is used to replace displacement table deflection, mechanical errors introduced by acceleration and deceleration of the displacement table are avoided, and therefore the consistency and machining precision of a micro-nano structure array are improved; that is to say, the application can simultaneously complete machining of the surface metasurface structure and internal three-dimensional waveguide structure, and preparation of a single-substrate integrated optical sensor without additional materials is realized.

The present invention relates to a lidar device (1) for detecting an environment of a vehicle, the lidar device comprising: a transmitting unit (10) for emitting laser beams (20), wherein the transmitting unit (10) includes a beam deflection unit (18) designed to direct the emitted laser beams (20) in different directions in order to scan the environment, and a receiving unit (12) for receiving laser beams (22) reflected by the environment, wherein the receiving unit (12) includes a detector (28) designed to convert the received laser beams (22) into electrical signals; According to the invention, the receiving unit (12) has a parabolic mirror (24) by means of which the received laser beams (22) are collected and reflected to a light-sensitive detector surface (32) of the detector (28)

The invention provides a polarization-insensitive tunable light beam deflector based on cascade metasurfaces, and relates to the technical field of optics. The polarization-insensitive tunable light beam deflector sequentially comprises a first-layer metasurface, an air gap and a second-layer metasurface from bottom to top, the first-layer metasurface and the second-layer metasurface are both composed of elliptical nano-column arrays which are periodically arranged; the lateral displacement dx of the second layer of metasurface relative to the first layer of metasurface in the x direction and the lateral displacement dy of the second layer of metasurface in the y direction are adjusted in a mechanical mode, the total phase distribution of the cascade metasurface is changed to generate a phase gradient, and continuous deflection scanning of an emergent light beam in a two-dimensional space is achieved. The polarization-insensitive metasurface unit structure is realized by adopting the elliptical nano-columns. The nanorods are rotated by 45 degrees, so that the unit structures have the same regulation and control capability under x and y polarization, and the problem that a traditional anisotropic structure is sensitive to the polarization state of incident light is solved.

The application discloses an on-chip integrated light beam deflector based on a phase change material and a metasurface, and belongs to the light beam deflector field. After incident light is incident on the chip, the incident light passes through a silicon waveguide array, a voltage is applied to a phase change material layer through a pixel electrode layer, the refractive index of the phase change material between different pixels is different, the phase change material and a light outcoupling structure of the metasurface are coupled to perform pixelization modulation on light, and then light beam deflection in a direction perpendicular to the silicon waveguide array is realized. The emergent light is finally transmitted through a light-transmitting cladding and emitted to outside the chip. The application can effectively improve the dimension of light field regulation and control of an existing metasurface device or system.