46results about How to "Realize 2D scanning" patented technology

The invention discloses a solid-state laser radar system, which comprises a laser, a detector, an emitting optical system, a receiving optical system and a control processing unit. The emitting optical system comprises a first optical switch, a first fiber array, a collimating lens and an emission laser galvanometer. The receiving optical system comprises a second optical switch, a second fiber array, a convergence lens and a receiving laser galvanometer. By utilizing functions of optical path selection and time division multiplexing of the optical switches, multi-line measurement can be realized through one laser and one detector; through cooperation of the first fiber array and the collimating lens as well as cooperation of the second fiber array and the convergence lens, scanning of a first dimension of a space is realized; and through deflection functions of the emission laser galvanometer and the receiving laser galvanometer on the laser, scanning of a second dimension vertical to the first dimension of the space is realized. The system is low in cost and small in size; and the laser radar system can be driven to rotate without a mechanical scanning mechanism.

The invention, which belongs to the field of the laser radar optical design system, provides a semi-coaxial optical path receiving laser radar system comprising a laser emitting module, a galvanometerscanning module and a laser receiving module. The galvanometer scanning module includes a first one-dimensional MEMS galvanometer, a second two-dimensional MEMS galvanometer and a reflective opticalelement; the scanning direction of the first one-dimensional MEMS galvanometer is perpendicular to the scanning direction of the second one-dimensional MEMS galvanometer; and the scanning mirror areaof the first one-dimensional MEMS galvanometer is smaller than that of the second one-dimensional MEMS galvanometer. The laser emitting module emits shaped pulsed laser; and the emitted laser passes through the first one-dimensional MEMS galvanometer and the second one-dimensional MEMS galvanometer to realize two-dimensional area array scanning; and a scattered echo signal is reflected by the second one-dimensional MEMS galvanometer and the reflective optical element and then returns to the laser receiving module. Therefore, a conflict problem between the echo energy and measurement accuracy is solved; the high resolution is realized in the process of testing people or objects ahead; and the authenticity of test results is guaranteed to the greatest extent.

The invention relates to a single-optical fiber scanning micro device as well as a production method and a control method thereof. The single-optical fiber scanning micro device is formed by wrapping an optical fiber with four pieces of piezoelectric ceramics, wherein a coating at the tail end of the optical fiber is removed, both ends of the four piezoelectric ceramics blocks are bonded around the optical fiber, a section of naked optical fiber is reserved, the four pieces of piezoelectric ceramics form a square cavity, the outer walls of the four pieces of piezoelectric ceramics are respectively provided with leads by tin soldering, the inner walls of the four pieces of piezoelectric ceramics on the cavity are conducted by conductive adhesives and are provided with one lead, the conducing wires of the two opposite pieces of ceramics in the horizontal direction are connected, and the leads of the two opposite pieces of ceramics in the vertical direction are connected. The single-optical fiber scanning micro device produced by the method has the advantages of short length, small size, good scanning repeatability, easy obtainment of raw materials, easy processing and low manufacturing cost, thereby having favorable application prospects on optical precise instruments as well as illumination devices, signal collection device and other devices in the field of clinical endoscopic operations.

This invention discloses a manufacturing method for a mirror scan array antenna composed of an array antenna, a mirror rotation unit and a reflection mirror, and the method applies a feeding mode of array antenna to realize wave beam scanning by rotating the reflection mirror. Advantages: compact structure, small volume, light weight, simple servo structure and low process cost.

The invention discloses a two-dimensional electronic scanning antenna. The two-dimensional electronic scanning antenna comprises a two-dimensional antenna array and also comprises first transmission lines, wherein the two-dimensional antenna array comprises at least two radiation unit groups, each radiation unit group at least comprises two radiation units, the first transmission lines are in correspondence to the radiation units, and each first transition line is connected with the two radiation units in one of the radiation unit groups and is used for simultaneously adjusting the phases of the two radiation units. By the two-dimensional electronic scanning antenna, the defect of structural complexity of a traditional two-dimensional electronic scanning antenna is overcome, and a constituent component of the antenna is simplified.

The invention provides an optical antenna, a phased array laser radar and a two-dimensional scanning method of the optical antenna. The optical antenna comprises an SOI substrate, a waveguide structure layer, a spacer layer, an annular grating structure layer and a protection layer; a waveguide structure layer is formed on the top silicon layer of the SOI substrate; the spacer layer, the annular grating structure layer and the protection layer are sequentially arranged on the waveguide structure layer; the waveguide structure layer comprises a radiation type strip-shaped waveguide array, speckle conversion structures and a circular flat plate coupling region, wherein the radiation type strip-shaped waveguide array is connected with the circular flat plate coupling region through the speckle conversion structures; the difference value of the refractive index of the annular grating structure layer and the refractive index of the spacer layer and the difference value of the refractive index of the annular grating structure layer and the refractive index of the protection layer are both greater than a preset threshold; and the refractive index of the annular grating structure layer ishigher than the refractive indexes of the spacer layer and the protection layer. Light waves can be successfully emitted upwards and inhibited from being emitted downwards, so that high radiation efficiency is obtained; the radiation type strip-shaped waveguide array can be divided into multiple groups; and the light of the strip-shaped waveguide groups in different directions work in a time-division manner, so that two-dimensional scanning can be realized.

The invention discloses a two-dimensional scanning varactor active super-surface electromagnetic lens antenna, which comprises a focusing lens, a two-dimensional scanning array, gaskets, a support column, a horn antenna and a base. The focusing lens is a super-surface electromagnetic lens. The two-dimensional scanning array, the focusing lens and the support column are connected by the gaskets inturn. The two-dimensional scanning array is formed by superimposing two one-dimensional scanning arrays: an x-direction scanning array and a y-direction scanning array, wherein the y direction is usedas the polarization direction, the z direction is used as the axis-of-symmetry direction of the lens, and the bias lines of the varistors in the two one-dimensional scanning arrays are in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltages of the varactors. The scanning array realizes two-dimensional scanning through the one-dimensional scanning arrays realized by two groups of varactor active super-surfaces, the scanning directions of the two arrays are orthogonal, and the two arrays are longitudinally superimposed. By using the method, the complexityand cost of super-surfaces in a large-scale two-dimensional scanning array can be reduced. Meanwhile, the focusing lens is realized by a super-surface, and the longitudinal size is reduced.

The invention discloses a two-dimensional scanning varactor active super-surface radome comprising a two-dimensional scanning array and gaskets. The two-dimensional scanning array is multi-layer varactor active super surfaces, and the layers are separated by the gaskets. The two-dimensional scanning array consists of two one-dimensional scanning arrays including an x-direction scanning array and ay-direction scanning array superposed in the z direction, the y direction is the incident wave polarization direction, the z direction is the incident wave propagation direction, and the varactor bias line directions of the two one-dimensional scanning arrays are both x direction. The radome achieves two-dimensional scanning by changing the bias voltage of the varactor in the two-dimensional scanning array, and the two-dimensional scanning array achieves two-dimensional scanning through the one-dimensional scanning arrays achieved by two sets of varactor active super surfaces with orthogonalscanning directions superimposed in the longitudinal direction. According to the method, the process complexity and the implementation cost of the super surfaces in the large-scale two-dimensional scanning array can be effectively reduced.

The invention discloses an MIMO communication system based on an irregular spliced sub-array architecture, which can be used for full-digital beam forming and hybrid digital beam forming. Each radio frequency link is connected with two adjacent antenna units through one power divider, so that the number of the radio frequency links can be greatly reduced. In the design process, firstly, irregularsub-array arrangement is optimized by taking MIMO channel capacity as an optimization target, and after an optimal array topological structure is obtained, precoding and decoding vectors are designedby taking spectral efficiency maximization as a target. The most innovation of the invention lies in that under the condition that the number of the radio frequency links is not changed, the irregularsubarray architecture improves the MIMO channel capacity by increasing the aperture area of the antenna array, and finally, the spectral efficiency is improved.

The invention relates to a nondestructive testing device for identifying authenticity of a pearl. The nondestructive testing device is characterized by comprising a halogen tungsten lamp source, an optical fiber spectroscope, mechanical components for fixing the optical fiber spectroscope, a fixing component, a manual mobile platform in vertical direction, mechanical components for fixing the manual mobile platform, an optical platform in vertical direction, an optical fiber connection plate, a lens, a reference lens, a PZT motor, an NI card, a directional manual mobile platform, turbinate cup components used for loading the pearl to be tested, a directional automatic mobile scanning platform and a controller thereof, a near-infrared spectrometer and a computer, wherein the fixing component is provided with the optical fiber connection plate and the lens; the NI card is used for controlling the PZT motor. The nondestructive testing device can two-dimensionally scan the pearl and can imagine the internal structure of the pearl. The nondestructive testing device not only can identify real and fake pearls, but also can identify natural seawater pearls or freshwater cultured pearls, and has high test precision.

The invention discloses an optical axis parallelism detection device with wide-range hole enlargement, belongs to the technical field of optical parallelism detection and solves the problem of big influence from diameter thereof in the prior art. The device comprises an extension type lens barrel, a rectangular prism, a rectangular ridge prism and double wedges; the rectangular prism and the rectangular ridge prism are arranged at the two ends of the extension type lens barrel respectively; the extension type lens barrel is provided with a light vent hole respectively in one side of the incident plane of the rectangular prism and one side of the exit plane of the rectangular ridge prism; the double wedges are arranged at one side of the exit plane of the rectangular ridge prism; and incident light emitted by a light emitting system of a to-be-detected device after passing through the rectangular prism enters the rectangular ridge prism for reflection, and the reflected light enters a receiving system of the to-be-detected device after passing through the double wedges. The device has a small volume and light weight, can realize detection of parallel beams with relatively big spatial distance and is suitable for wide-spectrum detection.

The invention provides a liquid crystal polymer polarization grating and a preparation method and application thereof, and particularly relates to a liquid crystal polymer polarization grating and a preparation method thereof, combination cascade of the liquid crystal polymer polarization grating and application thereof in two-dimensional optical scanning, and optical phased array radar comprisingcombination cascade and application thereof. The liquid crystal polymer polarization grating comprises a light-operated orientation film and a liquid crystal polymer film arranged on one side of thelight-operated orientation film. The molecular director direction of the light-operated orientation film is in periodic gradual change distribution; the director distribution of a layer of liquid crystal molecules, close to the photo-alignment film, in the liquid crystal polymer film is the same as that of molecules of the photo-alignment film; the liquid crystal polymer polarization grating has asmall area and a high integration degree, and the prepared optical phased array radar has the advantages of being small in size, low in cost, high in response speed, simple in control process and thelike.

The invention relates to the technical field of laser radar equipment, and discloses a 3D laser radar and a foot type robot. The 3D laser radar provided by the invention comprises a vertical scanning unit and a horizontal rotating device; the vertical scanning unit comprises a mounting base, and a laser receiving electrode, a convex lens, a laser emitting electrode and a reflecting body which are sequentially arranged on the mounting base; the laser receiving electrode is arranged at the focus position of the convex lens, the laser emitting electrode is arranged on the main optical axis of the convex lens, and the reflecting body is rotatably arranged on the mounting base; the rotation center of the reflector coincides with the main optical axis of the convex lens; and a laser pulse signal realizes environment scanning in a vertical plane through rotation of the reflector, and further realizes scanning of a three-dimensional environment through the horizontal rotating device. Two-dimensional scanning in a vertical plane in the environment is achieved through the vertical scanning unit, the vertical scanning unit is rotated in the horizontal direction through the horizontal rotating device, and three-dimensional scanning of the surrounding environment is achieved.

The invention provides a stable imaging method applicable to two-dimensional wide-area scanning. The core of the method is geographical stabilization and electron image movement compensation matching, forward movement of a photoelectric system is compensated in a geographical stabilization manner, the movement of the azimuth is compensated in a geographical stabilization and electron image movement combined manner, and clear imaging of the photoelectric system in the two-dimensional wide-area scanning process is finally realized. The method is mainly realized through algorithms, the structural form is simple, the imaging quality of the photoelectric system can be effectively improved, and the reliability of the photoelectric system can be improved.

The invention provides a space lens scanning antenna based on elliptical paraboloid of revolution phase distribution and a beam scanning method thereof. During beam scanning, the phase error of the space lens scanning antenna is unchanged along with the increase of a scanning angle, so that the gain is slowly reduced and the space lens scanning antenna is far superior to a lens antenna designed bythe traditional aplanatism principle; the structure is simple, the processing is convenient, and the device can be used for various frequency bands such as microwave, millimeter wave, terahertz and the like; complex active components and a feed network are not needed, complex lens design is avoided, system complexity is greatly reduced, and design flexibility is improved; the manufacturing cost is low, the power consumption is low, a special heat dissipation structure is not needed, and therefore the cost and the complexity are far lower than those of a phased array, a Lunberg lens and a complex network multi-beam antenna.

The invention discloses an image analyzer for ultraviolet OTF measuring equipment, and belongs to the field of optical metrology and test. The image analyzer mainly comprises an analysis slit, a relay optical system, an ultraviolet filter, an ultraviolet photomultiplier, and a two-dimensional electric scanning platform. During the test, the ultraviolet filter is inserted into a parallel optical path of the relay optical system; the image analyzer is driven to perform two-dimensional scanning by the two-dimensional electric scanning platform so that a tested ultraviolet optical system image an ultraviolet target at different positions of the analysis silt; after being amplified by the relay optical system and filtered by the ultraviolet filter, an ultraviolet target image on each scanning point is imaged on a photosensitive surface of the ultraviolet photomultiplier; and the ultraviolet photomultiplier converts the ultraviolet target image into an electric signal and transmits the electric signal to a control and data processing system of the ultraviolet OTF measuring equipment. The image analyzer for the ultraviolet OTF measuring equipment realizes the image analyzer required by the ultraviolet OTF measuring equipment, and has the characteristics of simple structure and high measurement accuracy.

The invention discloses a two-dimensional scanning varactor active ultra-surface thin lens antenna, comprising a focusing lens, a two-dimensional scanning array, a gasket, a supporting column, a hornantenna and a base; the two-dimensional scanning array is an ultra-surface; the focusing lens is a thin lens; the two-dimensional scanning array, the focusing lens and the supporting column are sequentially connected through the gasket, and the horn antenna is fixed on the base; the two-dimensional scanning array is formed by overlapping two one-dimensional scanning arrays of an x-direction scanning array and a y-direction scanning array in the z direction, the y direction is used as an incident wave polarization direction, the z direction is used as a lens symmetry axis direction, and the bias line directions of the two one-dimensional scanning arrays are both in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltage of the varactor, the scanning arrayrealizes two-dimensional scanning through two sets of one-dimensional scanning arrays, the scanning directions of the two sets of one-dimensional scanning arrays are mutually orthogonal and overlapped in the longitudinal direction. The ultra-surface complexity and cost of the large-scale two-dimensional scanning array can be effectively reduced by adoption of the method.

The invention relates to the technical field of automation identification, and provides an antenna system applied to three-dimensional scanning of a radar. The antenna system comprises antenna units, control switches, feed ports and a switch control system. The antenna units form an m*n antenna array. The control switches are arranged between the antenna units and used for being connected with the antenna units to form the m*n antenna array. The feed ports are connected with the antenna units at the tail ends of m rows and the tail ends of n lines. The switch control system controls the control switches to achieve two-dimensional scanning in the row direction and the line direction of an antenna beam. According to the antenna system, as the radio frequency switches are arranged between the antenna units, the switch control system controls the states of the radio frequency switches to achieve two-dimensional scanning in the row direction and the line direction of the antenna beam, and the three-dimensional scanning requirement of the radar is met.

The invention provides a laser radar measurement method and a laser radar system. The laser radar measurement method comprises the steps of generating an output optical signal with a tunable wavelength through a tunable laser generation unit; performing linear frequency modulation on the output optical signal to obtain a frequency-modulated continuous wave signal; splitting the frequency-modulated continuous wave signal to obtain an emergent light signal and a local oscillation light signal; carrying out power amplification on the emergent light signal and then emitting the emergent light signal by an optical phased array emission unit, and carrying out two-dimensional scanning on a target object; and receiving an echo light signal reflected by the target object, and obtaining distance and / or speed information of the target object according to the echo light signal and the local oscillation light signal. Tunable laser and an optical phased array system are combined, two-dimensional scanning is achieved on the basis of a one-dimensional optical phased array device, and the situation that the one-dimensional optical phased array device achieves two-dimensional scanning in a stacking mode is avoided; by adopting an external modulation mode, the optical phased array and the broadband tunable laser are reasonably combined with a frequency modulation continuous wave system, and the defect that narrowband linear frequency modulation of the broadband tunable laser is difficult is overcome.

The invention discloses a phased array arrangement optimization method based on irregular subarrays. A mixed integer linear programming model is provided. Meanwhile, the gain and sidelobe level duringarray scanning are considered, solving is conducted through a commercial solver to achieve the high gain and low sidelobe characteristics during irregular array scanning, and after array arrangementis optimized, a needed directional diagram is synthesized with the maximum gain as the principle through a convex optimization algorithm.

The invention discloses a vortex wave two-dimensional scanning system integrating a Rodman lens and an active metasurface, and mainly solves the problems of complex structure and lower communication capacity in the prior art. The vortex wave two-dimensional scanning system comprises an active transmission metasurface (1) and a feed source (2), the feed source adopts a single-layer Rodman lens antenna, and the active transmission metasurface is composed of a plurality of active transmission units; each active transmission unit comprises an upper layer and a lower layer which are the same in structure, and each layer comprises a dielectric substrate, a metal patch, a feed strip line, a metal column and a variable capacitance diode; the metal patch and the feed strip line are respectively printed on the upper surface and the lower surface of the dielectric substrate, and are connected through the metal column penetrating through the dielectric substrate; the variable capacitance diode is loaded in the center of the metal patch, and the two-dimensional scanning of vortex beams is achieved by changing the bias voltage of the variable capacitance diode and the input port of the Rodman lens antenna. According to the invention, the system structure is simplified, vortex beams can be generated, the communication capacity of the system is increased, and the system can be used for wireless communication and radar detection.

The invention discloses a phased array arrangement optimization method based on irregular subarrays. According to the method, the definition of array information entropy is fully utilized, and the array information entropy is applied to an irregular phased array based on a four-network grid form; and an optimization model is linearized by adding variables, so that an original problem can be solvedby a commercial solve; after array arrangement is optimized, a directional diagram of a required scanning angle is synthesized through a convex optimization algorithm. The method is most ingenious inthat the essential characteristics of the original optimization problem are mined; the convex optimization algorithm is adopted for optimization; and therefore, calculation time is greatly saved, anda super-large-angle scanning characteristic is guaranteed while only one fourth of the number of T / R components of an original array is used.

The invention discloses a phased array arrangement optimization method based on irregular sub-arrays, and proposes a mixed integer linear programming model, while considering the gain and sidelobe level during array scanning, and solving it by a commercial solver to realize The high gain and low sidelobe characteristics of irregular array scanning, after optimizing the array arrangement, use the convex optimization algorithm to synthesize the required pattern based on the principle of maximum gain.

The invention discloses an N-line laser radar scanning system and method. The scanning system comprises a laser light source and a two-dimensional scanning subsystem; the two-dimensional scanning subsystem comprises an optical switch, a collimating lens and a reflector; the output end of the laser light source is connected with the input end of the optical switch, the output end of the optical switch is connected with one side of the collimating lens, and a reflector is arranged on the other side of the collimating lens. The structure of a conventional laser radar scanning system is simplified, the manufacturing cost of multi-line laser radar is greatly reduced, the maintenance process is simple and convenient, and a thought is provided for popularization of the high-performance multi-line laser radar.

The invention relates to a single-optical fiber scanning micro device as well as a production method and a control method thereof. The single-optical fiber scanning micro device is formed by wrapping an optical fiber with four pieces of piezoelectric ceramics, wherein a coating at the tail end of the optical fiber is removed, both ends of the four piezoelectric ceramics blocks are bonded around the optical fiber, a section of naked optical fiber is reserved, the four pieces of piezoelectric ceramics form a square cavity, the outer walls of the four pieces of piezoelectric ceramics are respectively provided with leads by tin soldering, the inner walls of the four pieces of piezoelectric ceramics on the cavity are conducted by conductive adhesives and are provided with one lead, the conducing wires of the two opposite pieces of ceramics in the horizontal direction are connected, and the leads of the two opposite pieces of ceramics in the vertical direction are connected. The single-optical fiber scanning micro device produced by the method has the advantages of short length, small size, good scanning repeatability, easy obtainment of raw materials, easy processing and low manufacturing cost, thereby having favorable application prospects on optical precise instruments as well as illumination devices, signal collection device and other devices in the field of clinical endoscopic operations.

The invention relates to laser radar scanning, in particular to a laser three-dimensional imaging scanning method based on dielectric elastomer driving, and belongs to the field of optical design. A dielectric elastomer is used as a drive, and the two-dimensional scanning of a light beam is realized by using the radial eccentric movement principle of a lens. The movable lens driven by the dielectric elastomer is adhered to the midpoint area of the dielectric elastomer. Four areas are evenly distributed on the peripheral area of the movable lens driven by the dielectric elastomer, the upper surface of the dielectric elastomer in each area is evenly coated with a flexible electrode, and the lower surface of the dielectric elastomer in each area is evenly coated with a ground electrode. The movable lens driven by the dielectric elastomer can generate radial eccentric movement by adjusting voltage combination applied to the four electrodes, and parallel light beams are emitted in a direction having a deflection angle with the optical axis instead of being emitted at an angle parallel to the optical axis after passing through the movable lens driven by the dielectric elastomer and a second lens.Therefore, the scanning of a target is realized.

The invention discloses a two-dimensional scanning varactor active super-surface electromagnetic lens antenna, which comprises a focusing lens, a two-dimensional scanning array, gaskets, a support column, a horn antenna and a base. The focusing lens is a super-surface electromagnetic lens. The two-dimensional scanning array, the focusing lens and the support column are connected by the gaskets inturn. The two-dimensional scanning array is formed by superimposing two one-dimensional scanning arrays: an x-direction scanning array and a y-direction scanning array, wherein the y direction is usedas the polarization direction, the z direction is used as the axis-of-symmetry direction of the lens, and the bias lines of the varistors in the two one-dimensional scanning arrays are in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltages of the varactors. The scanning array realizes two-dimensional scanning through the one-dimensional scanning arrays realized by two groups of varactor active super-surfaces, the scanning directions of the two arrays are orthogonal, and the two arrays are longitudinally superimposed. By using the method, the complexityand cost of super-surfaces in a large-scale two-dimensional scanning array can be reduced. Meanwhile, the focusing lens is realized by a super-surface, and the longitudinal size is reduced.

The invention provides a hand-hold near-field imaging device and a scan imaging method thereof. The hand-hold near-field imaging device in the invention comprises a radiometer, a rotatable radiation guide device and a rotation drive device, wherein the radiometer is used for metering incident radiant quantity thereon; the rotatable radiation guide device is used for guiding radiations emitted by each point of a target object in a specific direction to the radiometer one by one; the rotation drive device is used for driving the radiation guide device to rotate; and the one-dimensional image ofthe target object in the specific direction can be obtained according to the radiant quantity metered by the radiometer.

The invention relates to the technical field of automation identification, and provides an antenna system applied to three-dimensional scanning of a radar. The antenna system comprises antenna units, control switches, feed ports and a switch control system. The antenna units form an m*n antenna array. The control switches are arranged between the antenna units and used for being connected with the antenna units to form the m*n antenna array. The feed ports are connected with the antenna units at the tail ends of m rows and the tail ends of n lines. The switch control system controls the control switches to achieve two-dimensional scanning in the row direction and the line direction of an antenna beam. According to the antenna system, as the radio frequency switches are arranged between the antenna units, the switch control system controls the states of the radio frequency switches to achieve two-dimensional scanning in the row direction and the line direction of the antenna beam, and the three-dimensional scanning requirement of the radar is met.