66 results about "Beam divergence" patented technology

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 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.

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.

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).

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 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.

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.

The gas detection device comprises a gas chamber for accommodating gas to be detected, a light source unit for emitting light and a light receiving unit for receiving light are arranged at the left end and the right end of the gas chamber respectively, and a movable reflecting surface is arranged on the inner wall, close to the left end of the gas chamber, of the gas chamber; the movable reflecting surface is rotationally connected with the air chamber through an adjusting structure, the adjusting structure can adjust the rotating angle of the movable reflecting surface, a fixed reflecting surface is fixedly arranged on the inner wall of the air chamber between the movable reflecting surface and the right end of the air chamber, and light emitted by the light source unit is reflected to the light receiving unit through the movable reflecting surface and the fixed reflecting surface. The gas detection device is simple in structure, the requirement for the light beam divergence angle of the light source is low, the light source with the large light beam divergence angle can be used for detecting gas, and the universality of the gas detection device is improved.

A near-eye light field projector (1), comprising a light source (10) generating a plurality of incident light beams (100) illuminating a SLM (20), configured to project a plurality of modulated light-beams (110). A first imaging element (32) is configured to project the plurality of modulated light beams (110) and form first images (31) at a first image plane (30). A second imaging element (40) is configured to project the modulated light beams (110) and form second images (123) at a second image plane (124). The modulated light beams (110) are incident onto a numerical aperture expander (NAE) (60) arranged between the first and second imaging elements (32, 40). The NAE (60) comprises a first plurality of expanding elements (61) and is configured to project each expanded image light beam (111) with increased numerical aperture and beam divergence angle relative to those of the modulated light beams (110). Each expanding element (61) has an element lateral size (LE) that is between 0.8 and 1.5, the beam lateral size (LB) of each of the modulated light beams (110).

The application relates to a method for realizing beam expansion and divergence angle compression by a quadrupole magnet and a solenoid, which is used for controlling high-energy electron beams generated by an accelerator, eliminating the influence of the Coulomb force of the electron beams and weakening the divergence angle of the electron beams. The method realizes electron beam expansion and primary compression of the divergence angle by four fixed permanent quadrupole magnetic rings and one electric quadrupole magnetic ring, and realizes ultimate compression of the beam divergence angle by one composite solenoid electromagnet. The electron beam radius is expanded from the millimeter level to the centimeter level in a very short distance, the influence of the Coulomb force is reduced by 1-2 orders of magnitude, and the increment of the divergence angle is controlled in the 0.01 mrad level. The initial divergence angle of the electron beam is compressed from the 1 mrad level to the 0.1 mrad level, and theoretically, the beam spot can be compressed from the meter level to the 10 cm level when the electron beam is transmitted for 1 km, so that the transmission distance of the electron beam is greatly increased.

The invention discloses a light source irradiation distribution measurement system and method based on a multi-rotor unmanned aerial vehicle, and belongs to the technical field of light source irradiation distribution measurement, and the system comprises a photoelectric detector which is statically disposed on the ground; the multi-rotor unmanned aerial vehicle is a carrying and power supply carrier of airborne equipment; the airborne high-precision pointing holder is mounted on the multi-rotor unmanned aerial vehicle and carries a light source to be measured and a camera; the clock synchronization module is carried on the multi-rotor unmanned aerial vehicle and the data acquisition and processing equipment and is used for realizing clock synchronization of the airborne high-precision pointing holder and the data acquisition and processing equipment; the data acquisition and processing equipment is statically deployed on the ground and controls the photoelectric detector to work; and the high-precision positioning module is carried on the multi-rotor unmanned aerial vehicle and obtains the real-time position of the multi-rotor unmanned aerial vehicle by adopting a positioning technology. According to the invention, difficulties in the aspects of site selection, equipment layout control, equidistant interval sampling and the like when the long-distance irradiation distribution of the large-beam divergence angle light source is measured can be solved.

The utility model provides a laser performance testing system, which relates to the technical field of testing and comprises a temperature control device, a light path transmission device and a light spot receiving device. The temperature control device comprises a carrier, a heating mechanism, a focus lens and an energy meter. The carrier is used for positioning a to-be-tested laser body, and the carrier and the light spot receiving device are both installed on the light path transmission device. The heating mechanism, the focus lens and the energy meter are all mounted on the carrier, and the heating mechanism is used for adjusting the temperature of the to-be-measured laser body; one of the focus lens and the energy meter is selected to be used, so that one of the focus lens and the energy meter is located on a beam propagation path of the to-be-measured laser body. The light path transmission device is used for adjusting a light beam which is emitted by the to-be-tested laser body and passes through the focus lens, so that the light beam is focused on the light spot receiving device. According to the design of the system, the energy and beam divergence angle change conditions of the laser at different temperatures can be tested, and the laser is improved according to the test result, so that the reliability and stability of the operation of the laser are improved.

The application discloses an indoor decoration measurement and line laying device and method, and belongs to the technical field of measurement. The method comprises the following steps: obtaining a laser bending risk coefficient based on indoor temperature and indoor wind speed; obtaining a laser brightness loss coefficient based on indoor ambient light intensity and indoor dust concentration; obtaining a laser projection risk coefficient based on the laser bending risk coefficient and the laser brightness loss coefficient; obtaining a projection surface evaluation coefficient based on projection surface roughness, projection surface lightness and projection surface glossiness; constructing a distance-wavelength-divergence angle adaptation model to output a distance-wavelength-divergence angle adaptation degree based on the laser projection risk coefficient, a laser working distance under the projection surface evaluation coefficient, a laser wavelength and a beam divergence angle; and constructing a laser intensity optimization model to output a target laser intensity based on the distance-wavelength-divergence angle adaptation degree and a current laser intensity. The application can improve the measurement accuracy and energy efficiency in a complex environment.

The utility model discloses a detachable long-distance adjustable cross laser positioner which comprises a front sleeve, a sliding sleeve, a rotating sleeve, a lens seat, a cylindrical lens assembly, an LD assembly and a tail fixing seat. Focal length adjustment is achieved through screw-thread fit of the rotating sleeve and the lens seat, the double-eccentric cylindrical lens group generates a cross light spot, and the long-focal-length collimating lens controls a light beam divergence angle. The LD assembly adopts a quick release structure, and supports quick replacement of a chip. The positioner has the advantages that the light beam precision is high (llt; the device has the characteristics of simple structure, convenient adjustment (+ / -5mm adjustment range), low maintenance cost (chip replacement is completed within 5 minutes) and the like, and is suitable for long-distance high-precision positioning scenes such as industrial measurement, building construction and the like.

The invention provides a laser homogenizing and amplifying optical device and optical equipment. The laser homogenizing and amplifying optical device comprises a first-stage beam expanding assembly, a light beam diverging assembly and a second-stage beam expanding assembly which share the same optical axis and are sequentially arranged from the laser side to the imaging side. The first-stage beam expanding assembly is based on a convex lens or a combination of the convex lens, so that the diameter of a laser beam is amplified by M1 times; the light beam diverging assembly diverges and homogenizes the laser beams amplified by M1 times; and the second-stage beam expanding assembly is based on a convex lens or a combination of the convex lens, so that the diverged and homogenized laser beam is amplified by M2 times again. According to the invention, through the step-by-step and stage-by-stage processing design of primary amplification, homogenization and divergence and final secondary amplification, and through superposition of two-stage amplification, the total amplification factor of the light beam is M1 * M2, the energy distribution characteristic after homogenization is maintained, and the application requirements of large-size and high-uniformity laser beams are met.

The present invention relates to an inspection method and system using a phased-array transverse wave for flaw detection of a plate material, an electronic device and a medium. The method comprises: acquiring the acoustic velocity of a phased-array transverse wave in a target plate material, the frequency of a phased-array probe element, the short-edge length of the phased-array probe element, and the thickness of a delay block; on the basis of the diameter of a vertical through hole to be inspected in the target plate material, determining a maximum value of the wavelength of the transverse wave; on the basis of the maximum value of the wavelength of the transverse wave and the acoustic velocity of the transverse wave in the target plate material, determining a frequency range of the probe; on the basis of the acoustic velocity of the phased-array transverse wave in the target plate material, the frequency of the phased-array probe, and the short-edge length of the phased-array probe element, determining a single element half-beam divergence angle of the probe; on the basis of the thickness of the delay block and the single element half-beam divergence angle, determining a probe aperture dimension along the principal axis; and, on the basis of the probe aperture dimension along the principal axis and the frequency of the probe, performing detection on the vertical through hole in the target plate material. The phased-array transverse wave in the present invention can detect defects of 1.6 mm vertical through holes in plate materials.

The invention discloses a low-altitude slow and small target sensing laser radar based on an optical fiber laser phased array. The device comprises a laser, a first acousto-optic modulator, a first circulator, a receiving and transmitting integrated phased array module, a second acousto-optic modulator, a narrow-band filter and a detector. The first acousto-optic modulator is connected with the laser and is used for carrying out pulse modulation on the continuous laser and converting the continuous laser into pulse signals suitable for laser radar ranging; the first circulator is used for outputting the modulated laser from the first acousto-optic modulator to the receiving and transmitting integrated phased array module in a transmitting path; in the receiving path, receiving a target echo signal returned from the receiving and transmitting integrated phased array module, and transmitting the target echo signal to the detection end; and the receiving and transmitting integrated phased array module is used for receiving the laser from the first circulator and carrying out beam shaping and scanning control on the light beam through a multi-path phase modulator in the receiving and transmitting integrated phased array module. The laser radar improves the power of emitted light beams, reduces the divergence angle of the light beams, and improves the detection resolution of the laser radar.

The embodiment of the application provides an airport indoor light control method and system, which is applied to the field of airport lighting control technology, extracts the intensity, direction and rate of the disturbance of the flight display screen through spectrum decomposition and interframe difference, generates a disturbance propagation result, collects light signals reflected, refracted and scattered by glass curtain walls, metal parts and composite material plates, constructs a multi-medium light energy flux correlation matrix, generates a regional light flux cooperative change distribution, calculates the angle change rate and interference bandwidth intensity as feedforward input by using the boarding gate sensor array, superimposes the weighted illumination feedback error to form a composite control, and simultaneously identifies the adaptive matching compensation coefficient in the bridge approach stage, and performs three-degree-of-freedom scheduling on the light flux, illumination direction and beam divergence angle of the lighting unit. The application can effectively suppress the double interference of the screen dynamic picture and the moving light source of the airplane, and improve the stability and uniformity of the light in the waiting area.

A method of making a microlens for a VCSEL device includes forming a first lens layer over a second reflector layer. The first lens layer has a first average concentration of a first element. A first additional reflector layer is formed over the first lens layer. A second lens layer is formed over the first additional reflector layer. The second lens layer has a second average concentration of the first element greater than the first average concentration. A second additional reflector layer is formed over the second lens layer.An oxidation process is performed to oxidize peripheral portions of the first and second lens layers to form oxidized peripheral portions of the first and second lens layer. The oxidized peripheral portions of the second lens layer are wider than the oxidized peripheral portions of the first lens layer.

The apparatus includes a plurality of stacked planar Bragg diffractors, each having at least a first planar Bragg diffractor and a second planar Bragg diffractor, the first and second planar Bragg diffractors positioned successively along an X-ray propagation axis of an X-ray beam, the X-ray beam including X-rays and having an angular beam divergence of less than 30 mrad in at least one direction.

A device comprises a plurality of stacked flat Bragg diffraction devices, including at least one first flat Bragg diffraction device and one second flat Bragg diffraction device. The first and second flat Bragg diffraction devices are sequentially positioned along an X-ray propagation axis of an X-ray beam. The X-ray beam consists of X-rays and has an angular beam divergence of less than 30 mrad in at least one direction.

The invention relates to the technical field of semiconductor lasers, in particular to a transverse-cavity vertical-emission plane metal grating surface emitting laser and an array, and the laser comprises a substrate; the quantum well layer is arranged on the upper end surface of the substrate; the ridge optical waveguide is arranged on the upper end face of the quantum well layer, the right end face of the ridge optical waveguide is processed to be an oblique angle phi, and high-reflectivity HR layers are arranged on the left end face and the right end face of the ridge optical waveguide. The invention has the following beneficial effects: the multi-layer superposed grating and the metal grating are cooperated, the coupling efficiency is improved to 92%-95% (traditional 85%), the line width is narrowed to 2-10KHz (traditional > = 100KHz), and the mode rejection ratio is > = 30dB; the oblique angle mirror surface and the double-sided HR reflection cooperate to realize vertical plane emission, and the beam divergence angle is less than or equal to 8 degrees.

Apparatus for and method of controlling a pattern variation in a semiconductor exposure tool in which the divergence of a beam of laser radiation generated by a laser radiation source is caused to assume a value greater than the smallest divergence the laser radiation source can achieve but less than a specified maximum for beam divergence for an exposure device using the beam of laser radiation.