134 results about "Beam divergence" patented technology

The invention discloses a variable beam divergence angle laser communication terminal and a rapid capturing method thereof, and belongs to the technical field of optical communication equipment. Comprising a main telescope, a fine tracking fast reflecting mirror, a beam splitter, an optical filter, a beam splitter, a beacon receiving lens group, a beacon detector, a signal transmitting lens group, an advanced aiming fast reflecting mirror, a signal receiving lens group, a receiving optical fiber amplifier, a multi-core optical fiber splitter, an optical switch and a transmitting optical fiber amplifier, a signal light emitting light path, a beacon light receiving light path and a signal light receiving light path are formed; the signal light emission light path provides emission light beams through different mode field optical fibers and performs shaping and variable beam divergence angle emission on the emission light by using different paths of an emission mirror group, and the signal light receiving light path is used for completing collection, shaping, coupling and light amplification on input signal light. And the beacon light receiving optical path is used for collecting, shaping and converging the input signal light, and positioning a target light spot by using an image positioning detector. According to the invention, the remote capturing efficiency can be improved.

The present application relates to the field of laser processing technology, and in particular to a water-cooled beam expander with adjustable divergence angle, the water-cooled beam expander with adjustable divergence angle comprising a first water-cooled lens barrel and a second water-cooled lens barrel, the first water-cooled lens barrel comprising a first lens barrel housing, a first lens being arranged in the first lens barrel housing, the second water-cooled lens barrel comprising a second lens barrel housing, a second lens being arranged in the second lens barrel housing, a first thread being arranged at one end of the first lens barrel housing close to the second lens barrel housing, a second thread being arranged at one end of the second lens barrel housing close to the first lens barrel housing, the first lens barrel housing and the second lens barrel housing being threadedly assembled through the first thread and the second thread. The distance between the first lens and the second lens is changed by thread adjustment, so as to achieve adjustment of the divergence angle of the light beam, thus solving the problem that the divergence angle of the conventional water-cooled beam expander is generally unable to be adjusted, and the adjustment structure of a very small portion of the water-cooled beam expanders that can adjust the divergence angle is relatively complex, resulting in high cost.

A handheld drone denial device, characterized in that the device comprises a laser emission unit comprising a high peak power pulsed laser and an adjustable beam expander, a sighting unit comprising a range finder and a sighting scope, a control unit comprising a denial device start and laser emission unit trigger switch, a power supply and a housing, the configuration of the laser emission unit, sighting unit, control unit, power supply, the structure of the housing and the arrangement of the units including the power supply on the carrier satisfy that the device discovers, locks and measures the range of a drone target through the sighting unit, manually or automatically adjusts the output laser beam divergence angle of the beam expander according to the range measurement result, and then or simultaneously triggers the laser emission unit trigger switch to emit laser to the drone target, wherein the adjustment of the beam expander includes that the adjustment of the beam divergence angle from a range of 500 meters to a range of 100 meters is incremental adjustment, or the adjustment of the beam divergence angle from a range of 100 meters to a range of 500 meters is decremental adjustment.

A device includes first, second and third elements fabricated on a common substrate. The first element includes an optical source, the second element includes at least one optical facet coupled to free space, and the third element includes a waveguide that optically couples the first element to the second element. The optical facet, having a compound III-V semiconductor material as a core and a dielectric material as a cladding, is characterized by a refractive index contrast between the core and the cladding that is greater or equal to 1. An optical beam exiting the facet is characterized by a central beam propagation axis and a FWHM beam divergence greater than 40 degrees referred to at least one axis perpendicular to the central beam propagation axis.

The present invention discloses a variable beam divergence angle laser communication terminal and a rapid acquisition method thereof, belonging to the technical field of optical communication devices, including a main telescope, a fine tracking fast steering mirror, a beam splitter, a filter, a beam splitter, a beacon receiving lens group, a beacon detector, a signal transmitting mirror group, a pre-aiming fast steering mirror, a signal receiving mirror group, a receiving fiber amplifier, a multi-core fiber splitter, an optical switch, and a transmitting fiber amplifier, which constitute a signal light transmitting optical path, a beacon light receiving optical path, and a signal light receiving optical path; the signal light transmitting optical path provides a transmitting beam through different mode field fibers, and uses different paths of the transmitting mirror group to shape and variably beam-divergence emit the transmitted light, the signal light receiving optical path is used to collect, shape, couple, and optically amplify the input signal light, and the beacon light receiving optical path is used to collect, shape, converge the input signal light, and use an image positioning detector to position the target light spot. The present invention can improve the efficiency of long-distance acquisition.

The embodiment of the invention provides a light spot feature calculation method, device and equipment for a dynamic image, and is applied to the technical field of optical image processing, and the method comprises the steps: carrying out the summation of each row of a non-zero pixel matrix, obtaining a column vector, multiplying the column vector by an index row vector, dividing the product sum by the sum of non-zero pixels, and obtaining the light spot feature of the non-zero pixel matrix. Obtaining a y coordinate value; summing each column of the non-zero pixel matrix to obtain a row vector, multiplying the row vector by the index column vector, and dividing the product sum by the sum of the non-zero pixels to obtain an x coordinate value; according to the x coordinate value and the y coordinate value, x-direction centroid coordinates and y-direction centroid coordinates of the light spot are obtained; calculating the variance of the x direction and the y direction according to the x coordinate value and the y coordinate value, and calculating the light spot roundness and the light spot diameter based on a least square method according to the variance of the x direction and the y direction; and calculating a beam waist radius and a beam divergence angle based on the light spot diameter. In this way, the real features of the light spots in the dynamic image can be accurately calculated.

The invention relates to a 3 [mu] m SOI-based polarization insensitive waveguide grating antenna for optical sensing. The waveguide grating antenna provides a substrate and a ridge waveguide located above the substrate; grating teeth are formed on the upper surface of the ridge waveguide through shallow etching; slab areas on the two sides of the ridge waveguide are provided with deep etching which is etched to the buried oxide layer. The OPA transmit-receive system introduced in the invention has high diffraction efficiency (gt; 70%), which is far greater than 50% emission efficiency of a conventional fishbone-shaped antenna; polarization is insensitive, and inherent loss of a polarization controller in the system can be eliminated; and the beam divergence is small (less than 0.01 degree), and the method has a good application prospect.

The invention aims to provide a medium-loaded ultra-wideband miniaturized double-ridged horn antenna, and belongs to the technical field of double-ridged horn antennas. A dielectric structure loaded on a horn mouth surface in the antenna comprises a dielectric lens, a dielectric flat plate and a dielectric guide section with a specific shape, and through loading of an integrated dielectric structure formed by the dielectric lens, the dielectric flat plate and the dielectric guide section, impedance mutation from a metal waveguide to a free space can be optimized, and reflection is reduced; electromagnetic waves are guided to converge, beam divergence is reduced, and the directivity and gain of a main lobe are improved; meanwhile, the wavefront of the horn mouth electromagnetic wave can be corrected to be a plane wave, phase distortion is reduced, and the far-field directivity is improved; focused electromagnetic waves are refracted, side lobes are reduced, and main lobe gain is improved. The ultra-wide-band miniaturized double-ridge horn antenna has excellent comprehensive performance of ultra wide band, miniaturization, high gain and low side lobe.

The present invention discloses a beam divergence angle electrically controllable nematic liquid crystal device, which includes stacked liquid crystal cells. The liquid crystal cell includes two stacked liquid crystal cells. The liquid crystal cell includes upper and lower substrates, a nematic liquid crystal layer is provided between the upper and lower substrates, an upper ITO electrode is plated on one side of the upper substrate, a lower ITO electrode is plated on one side of the lower substrate, and openings are provided on the upper ITO electrode and / or the lower ITO electrode. Looking from the direction perpendicular to the upper ITO electrode, the openings on the upper and lower ITO electrodes complement each other to form a regular array, and the upper and lower substrates and the nematic liquid crystal layer form a micro liquid crystal lens through the openings. The outgoing light beams emitted by adjacent micro liquid crystal lenses of the incident light beam overlap with each other in a divergent shape, and the divergence angle size is controllable. The present invention realizes the effective control and adjustment of the divergence angle size of the outgoing light beam, is easy to implement, has a low cost, and is suitable for popularization and popularization.

A laser device includes an oscillator outputting pulse laser light; an amplifier amplifying the pulse laser light; an optical pulse stretcher extending a pulse width of the pulse laser light; a beam divergence angle adjuster including an upstream lens arranged on an optical path of the pulse laser light, a downstream lens arranged downstream of the upstream lens, and an optical path length changing mechanism for changing an inter-lens optical path length between the upstream lens and the downstream lens; and a processor controlling the beam divergence angle adjuster and obtaining a repetition frequency or a duty of the pulse laser light, and to change, when the repetition frequency or the duty changes by a preset threshold or more, the inter-lens optical path length so that the beam divergence angle of the extended pulse laser light becomes small in accordance with the repetition frequency or the duty after the change.

The invention discloses an OAM vortex communication system device and method of a silicon-based photon integrated micro-ring resonator array, and belongs to the technical field of wireless communication of the Internet of Things. The system comprises a silicon-based photon integrated micro-ring resonator array, and ultra-compact OAM beam generation is realized through thermo-optical tuning; according to the lightweight channel compensation architecture, a dual-branch DNN model is combined with NV color center quantum sensing to realize phase noise real-time calibration; and dynamic regulation and control of a heterogeneous multi-user access mechanism and fusion AI drive. The method solves the problems of beam divergence, channel time-varying sensitivity and multi-user interference of a traditional OAM technology in an Internet of Things scene, the mode purity under the millimeter wave (28GHz) frequency band reaches 99% or above, and the method is suitable for intensive Internet of Things scenes such as industry 4.0, automatic driving and intelligent agriculture.

The invention discloses a focusing-free dual-wavelength laser beam expander and an anti-explosion laser range finder, the focusing-free dual-wavelength laser beam expander comprises a first lens group and a second lens group which are coaxially arranged at an interval, and the distance between the first lens group and the second lens group is fixed; the clear aperture of the second lens group is larger than that of the first lens group, dual-wavelength laser enters the first lens group and exits through the second lens group, so that the beam divergence angle of the dual-wavelength laser is achieved, the basically same multiplying power is compressed at the same time, and the dual-wavelength laser comprises first laser and second laser; the first laser and the second laser have different wavelengths, beam expansion of the dual-wavelength laser with basically the same magnification can be achieved at the same time, the divergence angle of the dual-wavelength laser beam is compressed with basically the same magnification at the same time, a focusing-free structure of a fixed lens structure is adopted, the requirement for the optical technology is low, the structure is simple, installation and adjustment are convenient, and damage is not likely to happen. The anti-riot laser range finder assembled by the anti-riot laser range finder is small in size, light in weight and beneficial to productization.

The present invention provides a lighting system for illuminating an agricultural environment wherein the lighting system comprises: a first lighting unit configured to illuminate the agricultural environment with a first light having a first light characteristic; a second illumination unit configured to project at least one light beam, where each light beam has a beam divergence of less than 15 degrees and creates a light spot within the agricultural environment; a controller for controlling the second lighting unit, where the controller is configured to: (i) obtain a signal indicative of a first light characteristic of the first light, (ii) determine a second light characteristic substantially different from the first light characteristic in response to the signal; and (iii) controlling the second illumination unit to project at least one light beam with the second light characteristic.

The invention provides a laser fuze emission beam-expanding optical lens in an extremely simple form, and the optical lens comprises an emission lens which is located at the rear end of the lens and is used for carrying out the small-angle compression shaping of a beam divergence angle of a meridian-direction Gaussian beam emitted by a laser; and the wave mirror is positioned at the front end of the lens and is used for carrying out large-angle beam expansion on the beam divergence angle of the Gaussian beam emitted by the laser in the sagittal direction and realizing uniform shaping of light spots. Strip-shaped distribution shaping is carried out on Gaussian beams of the laser through the extremely simple form of the two lenses, so that the light beam emergent view field in one direction, namely the meridian direction, is compressed to 1 degree, and the light beam emergent view field in the other vertical direction, namely the sagittal direction, is expanded to 90 degrees. By adopting the special element design of the cylindrical surface array, the uniform energy distribution of the whole strip-shaped light spot is realized, the target detection precision of the surface-air laser fuze in a large-range space region is greatly improved, and meanwhile, the extremely simple design is more beneficial to meeting the requirements of miniaturization and low cost.

This invention discloses a high signal-to-noise ratio modulation transfer frequency stabilization optical path device, including a light source and a frequency stabilization optical path. The light source adopts an internally adjustable fiber collimator, with a 45° reflector behind it. The frequency stabilization optical path behind the 45° reflector includes a half-wave plate and a polarizing beam splitter (PBS). An atomic gas cell and two pyramidal reflectors are sequentially arranged on the probe light path of the PBS. A half-wave plate, a 45° reflector, an electro-optic modulator, another 45° reflector, and a half-wave plate are sequentially arranged on the pump light path. The polarizing beam splitter (PBS) is located at the convergence point of the two optical paths, and a 45° reflector, a frequency stabilization optical path lens, and a photodetector are sequentially arranged behind it. This invention cleverly utilizes a folded optical path design and fine-tunes the beam divergence angle to increase the length and area of ​​the laser-atomic interaction without increasing the system volume. At the same time, it actively controls the splitting ratio of the two frequency-stabilized beams, improving the stability of the frequency stabilization.

The application discloses a kind of self-adapting threshold correction spot beam divergence angle calculation method, equipment and medium, it is related to laser communication technical field.The method includes: continuously obtaining the debugging spot picture of image acquisition equipment output, and the maximum gray value of debugging spot picture is calculated;Maximum gray value is based, and the exposure of image acquisition equipment is adjusted, until the initial spot picture of maximum gray value and pixel number reaches preset threshold value is output;Based on preset initial pixel threshold value, the pixel value variance of initial spot picture is calculated, and initial pixel threshold value is updated, until the target pixel threshold value that makes pixel value variance reach maximum value is obtained;Zero is placed in the pixel value lower than target pixel threshold value in initial spot picture, to obtain target spot picture;The first moment and second moment of target spot picture are calculated, to obtain the spot beam divergence angle of target spot picture.The application is by adjusting exposure and variance maximization threshold selection mechanism, to improve the calculation precision of spot beam divergence angle.

This invention relates to the field of laser application technology, specifically a precision long-range laser demolition device. It includes a support frame on which a laser device is fixedly mounted. The laser output end of the laser device is a laser emitter head. A fixed shell is integrated into the laser device, and a limiting groove is formed inside the fixed shell. A sliding block is slidably connected within the limiting groove, and a pair of protective mirrors are mounted on the sliding block. The protective mirrors protect the laser emitter head, and a slider is fixedly connected to the sliding block. When using this device in rainy weather, if rainwater or debris adheres to the protective mirrors, the rainwater and debris will cause diffraction and scattering of the laser, resulting in an increased beam divergence angle and affecting the laser power. Wiping the surface of the protective mirrors with a sponge can prevent debris and rainwater from affecting the light transmittance of the protective mirrors.

The invention relates to a laser beam large beam divergence angle measuring system and method of a laser measuring illuminator, the measuring system comprises the laser measuring illuminator, a camera and a measuring scale, the camera is distributed on one side of one end of the laser measuring illuminator and can move in the direction from one side to the other side of a circular light spot formed by laser beams emitted by the laser measuring illuminator, and the measuring scale is used for measuring the large beam divergence angle of the laser beams emitted by the laser measuring illuminator. Recording specific positions of the camera on two sides of the circular light spot; measuring the distance between the two positions of the camera by using a measuring scale so as to obtain the diameter d of the circular light spot; the invention further relates to a large beam divergence angle measuring method. The measuring system and method for measuring the large beam divergence angle of the laser beam have the advantages that compared with a traditional trepanning method, the method can measure the beam divergence angle of a laser illuminator with the large beam divergence angle by directly measuring the diameter of a light spot amplified in the distance.

A beam diffusion and convergence control system based on an annular electrified multi-conductor angular magnetic field is used for regulating and controlling the beam spot size and the beam divergence angle of a charged particle beam, diffusion and convergence of beams can be achieved, and the transverse size of the beams can be enlarged and reduced. A hardware implementation carrier of the charged particle beam diffusion and convergence regulation and control method mainly comprises an annular electrified multi-conductor device and an exciting current source. An ideal axisymmetric angular magnetic field can be generated in the annular energized multi-conductor device, so that the diffusion or convergence motion state of charged particle beams can be realized under the condition that only one group of annular energized multi-conductor devices is adopted based on the action of Lorentz force in a centrifugal or centripetal direction; the intensity and direction (clockwise or anticlockwise) of the angular magnetic field in the device can be randomly adjusted by adjusting the direction and amplitude of the exciting current; theoretically, the beam spot radius of the charged particle beam can be adjusted by 1-3 orders of magnitude or more.

An illumination apparatus comprises a housing configured to be coupled to an aerial vehicle. Coupled to the housing are a light source and a lens system at least partially covering the light source and configured to adjust an angular divergence of light therefrom. At least one position sensor is positioned within the housing and generates signals corresponding to an altitude of the illumination apparatus, a distance between the illumination apparatus and a ground surface, and / or a multi-axis angular position of the illumination apparatus relative to the ground surface. A controller within the housing adjusts the angular divergence of the light from the light source using the lens system based at least in part on monitored data from the at least one position sensor and a selected spot size of the light on a target wherein an actual spot size on the target is approximately equal to the selected spot size.

The present disclosure relates to an optical device (1) for controlling light, the optical device (1) comprising: a first waveguide (2) for receiving a light beam from an external light source; at least a second waveguide (3); an optical coupler (4) for coupling the light beam from the first waveguide (2) to the second waveguide (3); a beam shaping structure (5) having a light emitting area (6) for emitting the light beam, wherein the second waveguide (3) is configured to guide the light beam coupled from the first waveguide (2) to the beam shaping structure (5), wherein the beam shaping structure (5) is configured to propagate the light beam received from the second waveguide (3) to the light emitting area (6) such that a beam divergence of the light beam emitted from the light emitting area (6) is lower than a beam divergence of the light beam received from the second waveguide (3).

A Method and a system for aligning the optical components of a fiber- coupled, single molecule detection instrument for detecting protein concentrations in a prepared assay solution consisting of several components, the system comprising a digital autocollimator alignment telescope to thereby measure reference mirror angle and beam divergence, angle, and position, an instrument alignment frame to thereby constrain the instrument optical frame during the alignment procedure, a DeMux sorter focusing jig to thereby focus detector lenses in the DeMux sorter, objective inserts installed in place of objectives during the alignment procedure and multiple backlights and targets to thereby perform the optical element alignments.

The invention provides a multilayer film reflector with an 8keV energy point and a preparation method of the multilayer film reflector, and belongs to the technical field of optical thin film manufacturing. Aiming at the energy point of 8keV, proper W layer and Si layer materials are selected, a genetic algorithm and film layer optimization are combined to carry out film system design, and the designed film layer is prepared by using magnetron sputtering equipment. Angle broadening is carried out in the 8keV field, and technical breakthrough is achieved. Through the thought of changing efficiency through optical design, the angle broadening acceptance range of the multi-layer film is enlarged by three times, and the core contradiction that luminous flux loss and light beam divergence are not matched in X-ray optics is directly solved.

The invention discloses a vehicle lamp multi-objective optimization method, device and equipment based on a particle swarm algorithm, and relates to the technical field of photoelectronics. Comprising the following steps: detecting a communication distance of a front target object and ambient illuminance in real time, and obtaining a minimum emergent luminous flux threshold value in a current vehicle driving mode; the communication distance and the ambient illuminance are taken as environment variables, the laser power, the beam divergence angle and the modulation depth are taken as optimization variables, a particle swarm optimization algorithm is adopted to iteratively calculate a comprehensive evaluation function under the forced constraint that the minimum emergent luminous flux threshold value is met, and a globally optimal control parameter combination is output; generating a high-frequency driving signal according to the optimal modulation depth, and driving a blue laser diode to output a blue laser beam carrying a communication code at the optimal laser power; and dynamically adjusting the projection optical module according to the optimal light beam divergence angle, and changing the divergence angle of the emitted white light illumination light beam. According to the method, the adaptive capacity and the multi-target comprehensive performance of the intelligent vehicle lamp in the dynamic traffic environment are remarkably improved.

According to one embodiment, an apparatus is provided comprising an optical layer (610) for being disposed on a sub-pixel of a plurality of sub-pixels (614), each sub-pixel of the plurality of sub-pixels emitting a light beam and corresponding to a color. Further, the apparatus can comprise the optical layer for combining the light beam of each sub-pixel of the plurality of sub-pixels and / or mixing the color of the light beam of each sub-pixel of the plurality of sub-pixels by expanding the light beam from each sub-pixel of the plurality of sub-pixels to cover an area corresponding to a full pixel pitch. The apparatus can comprise an embodiment in which a beam divergence angle of the combined light beam overlaps at least 80% of a beam divergence angle of each sub-pixel of the plurality of sub-pixels.

The invention discloses a differential absorption laser radar correction method and device, equipment and a storage medium, and relates to the technical field of laser radars. The method comprises the following steps: acquiring echo signal intensity curves and first beam divergence diagrams of a plurality of angle intervals of a to-be-processed laser radar; the plurality of angle intervals comprise a first angle interval and a plurality of second angle intervals, and the echo signal intensity curve comprises echo signal intensity curves of emitted light beams with a plurality of wavelengths; executing the following operations on the emitted light beam of each wavelength: determining a first height corresponding to an echo signal intensity curve of a first angle interval and a second height corresponding to an echo signal intensity curve of each second angle interval; based on the first height and the angle interval corresponding to the first height, and each second height and the angle interval corresponding to each second height, generating a second beam divergence graph by using a preset generation algorithm; and performing correction processing on the laser radar based on the first beam divergence graph and the second beam divergence graph.

The invention relates to a projection device (2a, 2b) for data glasses (1a). The projection device (2a) comprises an image generating unit (5) for generating at least one first light beam (15) representing image information and at least one redirecting element (21) configured to redirect the first light beam (15, 16) into a second light beam (35a, 35b, 35c) representing first image information and to redirect the first light beam (15, 16) into a third light beam (40a, 40b, 40c) representing second image information into a first viewing line region (30a) and / or a second viewing line region (30b) of an eye (55), wherein the second light beam (35a, 35b, 35c) and the third light beam (40a, 40b, 40c) differ in terms of beam divergence, and wherein the second viewing line region (30b) and the first viewing line region (30a) at least overlap.

The application provides a collimation system based on a MEMS mirror and a laser radar, the collimation system based on the MEMS mirror comprises: a laser emission unit for emitting a modulated laser beam; a front light beam shaping unit for shaping the laser emitted by the laser emission unit; a MEMS mirror scanning unit for scanning a field of view of a to-be-measured plane after resonant reflection of the light beam shaped by the front light beam shaping unit by using a MEMS mirror; and a rear collimation unit for performing secondary shaping on the light beam reflected by the MEMS mirror scanning unit, so that the edge light beam and the center light beam deflected by the MEMS mirror have equal optical paths at an entrance pupil of the rear collimation unit. The collimation system based on the MEMS mirror can improve the energy coupling efficiency of the system, reduce the beam divergence angle and the system volume, and make the ranging capabilities of the center field of view and the edge field of view uniform.

An optical system comprising: a sensor array having a field of view; an emitter array including a plurality of emitter units mounted on a surface of the common substrate and arranged in a two-dimensional array, in which each emitter unit of the plurality of emitter units is spaced apart from an adjacent emitter unit by a first pitch, and emits a light pulse having a predetermined beam divergence; and a fly-eye element spaced apart from the emitter array and configured to spread light received from each of the plurality of emitter cell elements into an entire field of view of the sensor array, the fly-eye element comprising a first lenslet array and a second lenslet array spaced apart from each other, wherein the individual lenslets in the first lenslet array and the second lenslet array are spaced apart from each other in at least one dimension by a second pitch different from the first pitch, and wherein each individual lenslet in the first lenslet array is aligned with a corresponding lenslet in the second lenslet array.

The present application relates to the field of laser equipment performance test, especially to a kind of laser equipment optical axis consistency and beam divergence angle combined test system and test method, test system includes off-axis parabolic reflector, photoelectric detector is arranged in its focal plane, movable target source is arranged in front of photoelectric detector, illumination device and data processor. By movable target source, different observation channel of laser equipment is provided with aiming target, and the shadow image and laser spot image of target source are collected in succession using the same photoelectric detector. Data processor calculates the deviation between different observation axes according to the shadow image, or the deviation between observation axis and laser beam optical axis;According to the laser spot image, the beam divergence angle and the optical axis stability are calculated. The present application integrates multiple test functions in the same optical path and hardware platform, realizes the efficient, compact combined test of optical axis consistency, beam divergence angle and other key indicators, significantly improves the test efficiency and saves space.