WO2021143814A1 - Dispositif d'imagerie aérienne tridimensionnel basé sur une intersection d'un faisceau lumineux et une ionisation de l'air - Google Patents

Dispositif d'imagerie aérienne tridimensionnel basé sur une intersection d'un faisceau lumineux et une ionisation de l'air Download PDF

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Publication number
WO2021143814A1
WO2021143814A1 PCT/CN2021/072067 CN2021072067W WO2021143814A1 WO 2021143814 A1 WO2021143814 A1 WO 2021143814A1 CN 2021072067 W CN2021072067 W CN 2021072067W WO 2021143814 A1 WO2021143814 A1 WO 2021143814A1
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Prior art keywords
pulse
sub
beams
amplification module
light
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PCT/CN2021/072067
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English (en)
Chinese (zh)
Inventor
范超
韩东成
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安徽省东超科技有限公司
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Filing date
Publication date
Priority claimed from CN202020099628.2U external-priority patent/CN211402966U/zh
Priority claimed from CN202010048276.2A external-priority patent/CN111123552A/zh
Application filed by 安徽省东超科技有限公司 filed Critical 安徽省东超科技有限公司
Publication of WO2021143814A1 publication Critical patent/WO2021143814A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
    • G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels by projecting aerial or floating images

Definitions

  • the present disclosure relates to the field of air display, and in particular, to a three-dimensional aerial imaging device based on light beams intersecting ionized air.
  • the existing air ionization system is divided into a plane display air ionization system and a three-dimensional display air ionization system.
  • the flat display air ionization system includes three modules of high-power pulsed light source, beam control and air ionization.
  • the beam control module is composed of a two-dimensional high-speed scanning galvanometer and a flat-field focusing lens.
  • the galvanometer system is composed of galvanometers in the x-direction and y-direction, which can scan the reflected beam in a plane; the flat-field focusing lens forms a uniform-sized focused spot of the beam in the entire plane.
  • a zoom lens is added to the flat display system.
  • the zoom lens changes the position in the z direction at the focal point of the ionization zone by changing the focal length of the lens, and combines the x-direction and y-direction galvanometers to control the ionization point to change in the stereo space to form a stereo picture.
  • a Spatial Light Modulator (SLM) is added to the beam control system to achieve the purpose of light wave modulation by modulating parameters such as the amplitude, phase, and polarization of the light field.
  • the output beam of the pulsed light source is modulated by the SLM light field, and after the zoom system, multiple focal points are formed, so the pixels of the display screen are increased.
  • the laser pulse output by the high-power pulsed light source is modulated by the SLM light field, and then reflected to the galvanometer system to adjust its exit direction.
  • the beam passes through the zoom lens and the flat field focusing lens and then is focused into the air ionization area.
  • the high-power laser ionizes the air molecules to form a luminous bright spot.
  • the computer actively controls the SLM, the galvanometer system, and the zoom lens, and adjusts the position of the laser ionization point and the pixels of the display image according to the image to be displayed.
  • the air ionization system Due to the limitation of the deflection angle of the galvanometer in the galvanometer system and the limitation of the size of the zoom lens, the air ionization system has a small display image range and cannot meet the aerial display requirements of a larger image.
  • the present disclosure aims to solve at least one of the technical problems existing in the prior art.
  • the present disclosure provides a three-dimensional aerial imaging device based on beam intersection ionizing air, which divides the pulsed light source into multiple sub-beams and converges in the air to solve the synchronization problem between pulses at the intersection point, and at the intersection of the beams.
  • the generation of air ionization solves the technical problem of the small display range of the air ionization system caused by various factors in the display system, and significantly increases the range of the air ionization display area.
  • the three-dimensional aerial imaging device based on beam intersection ionized air includes: a pulse seed source, a beam splitter, a plurality of galvanometer components, a plurality of pulse amplification modules, and a plurality of time delay lines.
  • the pulse seed source A pulsed beam is generated, the splitting coupler is arranged on the line of the pulsed beam for dividing the pulsed beam into a plurality of sub-beams, and a plurality of the galvanometer components are arranged on the plurality of the sub-beam lines in a one-to-one correspondence
  • the above is used to change the irradiation direction of the sub-beams in the horizontal or vertical direction to converge a plurality of the sub-beams at the intersection and ionize the air to form a holographic real image, and a plurality of the pulse amplification modules are one by one
  • the time delay line is arranged on the lines of the multiple sub-beams in a one-to-one correspondence, and the time delay line is located between the pulse amplifying module and the galvanometer assembly, and the time delay line is used for adjusting all the sub-beams.
  • the pulse time position of the sub-beams is such that when the sub-beams converge at the intersection point, multiple pulses are time coincident.
  • the pulse beam is divided into multiple sub-beams by using a splitting coupler, and the multiple sub-beams undergo amplification processing, time delay processing and steering processing and then merge.
  • the same pulse beam is divided, thereby solving the problem of pulse time synchronization between sub-beams.
  • multiple galvanometer components are used to control multiple sub-beams for intersecting and ionization, which can increase the area of the sub-beams' intersection points, thereby expanding the imaging range of the three-dimensional aerial imaging device.
  • the three-dimensional aerial imaging device further includes: a plurality of pulse compression devices, the plurality of pulse compression devices are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence, and the pulse compression device Located between the pulse amplification module and the time delay line, the pulse compression device is used for compressing the pulse width of the sub-beam to increase the pulse light peak power of the sub-beam.
  • the three-dimensional aerial imaging device further includes: a plurality of beam collimating devices, a plurality of the pulsed beam collimating devices are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence, and the The beam collimating device is located between the pulse compression device and the time delay line, and the beam collimating device is used to adjust the sub-beam into a collimated beam that meets the ionization threshold.
  • the three-dimensional aerial imaging device further includes: a water-cooled radiator connected to the pulse seed source, the spectrocoupler, the pulse amplification module, the pulse compression device and the The beam collimating device is used for dissipating heat for the pulse seed source, the light splitting coupler, the pulse amplification module, the pulse compression device, and the beam collimating device.
  • the three-dimensional aerial imaging device further includes: a pulse light source housing, a temperature sensor and a controller, the pulse seed source, the spectrocoupler, the pulse amplification module, the pulse compression device, and
  • the beam collimation devices are all arranged in the pulse light source housing, the pulse light source housing is formed with a plurality of light outlets for the sub-beams to pass through, and the temperature sensor is arranged in the pulse light source housing
  • the controller is used for detecting the temperature inside the pulse light source housing, and the controller is used for signal connection between the temperature sensor and the water cooling radiator for controlling the temperature inside the pulse light source housing.
  • the controller signally connects the pulse seed source, the beam splitter, the pulse amplification module, the pulse compression device, and the beam collimation device to control the sub-beam The output parameters.
  • the pulse amplifying module includes: a pre-amplifying module and a main amplifying module, and the pre-amplifying module is located between the main amplifying module and the optical splitter coupler.
  • the pulse width of the plurality of sub-beams is 10fs-100ns
  • the pulse energy is 10 ⁇ J-100mJ
  • the pulse repetition frequency is 50Hz-10MHz.
  • Fig. 1 is a schematic structural diagram of a three-dimensional aerial imaging device based on beam intersection ionized air according to an embodiment of the present disclosure.
  • 1-1 Pulse seed source; 1-2: Spectrocoupler; 1-3: First pulse amplification module; 1-4: Second pulse amplification module; 1-5: First pulse compression device; 1-6: The second pulse compression device; 1-7; the first beam collimating device; 1-8: the second beam collimating device; 2: the time delay line; 2-1: the first time delay line; 2-2: the second Time delay line; 3: Galvanometer assembly; 3-1: First galvanometer assembly; 3-2: Second galvanometer assembly; 4: Holographic real image; 5: Controller; 6: Water-cooled radiator; 7: Calculator .
  • the three-dimensional aerial imaging device based on beam intersection ionized air includes: a pulse seed source 1-1, a beam splitter 1-2, multiple galvanometer components 3, and multiple pulse amplification Module and multiple time delay lines 2.
  • the pulse seed source 1-1 can generate a pulse beam
  • the splitting coupler 1-2 is arranged on the line of the pulse beam and adjacent to the pulse seed source 1-1, and is used to split the pulse beam into
  • the multiple sub-beams and the pulsed beam are irradiated on the light splitting coupler 1-2 and divided into multiple sub-beams.
  • the energy of the multiple sub-beams can be evenly distributed.
  • the pulsed beam can be divided into two sub-beams.
  • a plurality of the galvanometer assemblies 3 are provided on a plurality of the sub-beam lines in a one-to-one correspondence, and are used to change the irradiation direction of the sub-beams in a horizontal or vertical direction to combine the plurality of sub-beams.
  • the air is converged and ionized to form a holographic real image 4, and a plurality of the pulse amplification modules are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence for amplifying the pulses of the sub-beams,
  • the pulse amplifying module is located between the galvanometer assembly 3 and the light splitting coupler 1-2, and a plurality of the time delay lines 2 are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence, and
  • the time delay line 2 is located between the pulse amplifying module and the galvanometer assembly 3, and the time delay line 2 is used to adjust the pulse time position of the sub-beams so that the sub-beams converge at the intersection point. Multiple pulse times coincide.
  • the three-dimensional aerial imaging device includes: a pulse seed source 1-1, a beam splitter 1-2, two galvanometer components 3, two pulse amplification modules and two time delays Line 2, the two galvanometer assemblies 3 are the first galvanometer assembly 3-1 and the second galvanometer assembly 3-2, and the two pulse amplification modules are the first pulse amplification module 1-3 and the second pulse amplification module respectively 1-4, the two time delay lines 2 are the first time delay line 2-1 and the second time delay line 2-2, respectively.
  • the pulse beam generated by the pulse seed source 1-1 is passed through the split coupler 1-2 to form two sub-beams, which are the first sub-beam and the second sub-beam respectively.
  • the first galvanometer assembly 3-1 and the first pulse amplifying module 1- 3 and the first time delay line 2-1 are arranged on the first sub-beam
  • the second galvanometer assembly 3-2, the second pulse amplification module 1-4 and the second time delay line 2-2 are arranged on the second sub-beam superior.
  • a pulse amplifying module in the forward direction of each sub-beam, a pulse amplifying module, a time delay line 2 and a galvanometer assembly 3 are arranged in sequence, and the sub-beam energy split by the splitter coupler 1-2 is relatively low.
  • the pulse amplifying module After the pulse amplifying module Then, the energy of the sub-beams rises, and then the time delay line 2 is passed to ensure that the multiple pulses in the multiple sub-beams are synchronized in time.
  • the multiple sub-beams After the sub-beams enter the galvanometer assembly 3 and change the irradiation direction, the multiple sub-beams will intersect in the air. The energy of the beams converge to reach the threshold of air ionization, and multiple sub-beams ionize the air at the intersection point to form a holographic real image 4.
  • the pulse beam is divided into a plurality of sub-beams by the splitting coupler 1-2, and the plurality of sub-beams are converged after amplification processing, time delay processing and steering processing.
  • Each sub-beam is divided into the same pulse beam, which can solve the problem of time synchronization between multiple pulses in the sub-beam.
  • multiple galvanometer assemblies 3 are used to control multiple sub-beams to perform cross-ionization, which can increase the area of the sub-beams’ converging points, thereby expanding the imaging range of the three-dimensional aerial imaging device.
  • the three-dimensional aerial imaging device further includes a plurality of pulse compression devices, and the plurality of pulse compression devices are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence.
  • the pulse compression device is located between the pulse amplification module and the time delay line 2, that is to say, a pulse compression device is provided on each sub-beam, and in the forward direction of the sub-beam, the pulse compression device is provided in all the sub-beams. Between the pulse amplification module and the time delay line 2, the pulse compression device is used to compress the pulse width of the sub-beam to increase the pulse light peak power of the sub-beam.
  • first pulse compression device 1-5 is arranged on the first sub-beam.
  • second pulse compression device 1-6 are arranged on the second sub-beam.
  • the three-dimensional aerial imaging device further includes a plurality of beam collimating devices, and a plurality of the pulsed beam collimating devices are arranged on the lines of the plurality of sub-beams in a one-to-one correspondence.
  • the beam collimating device is located between the pulse compression device and the time delay line 2, that is to say, each sub-beam is provided with a beam collimating device, and the beam is collimated in the forward direction of the sub-beam
  • the straightening device is located between the pulse compression device on the sub-beam and the time delay line 2, and the beam collimating device can adjust the sub-beam into a collimated beam that meets the ionization threshold.
  • the beam collimating device 1-7 there are two beam collimating devices, namely the first beam collimating device 1-7 and the second beam collimating device 1-8.
  • the first beam collimating device 1-7 is arranged on the first sub-beam.
  • the two beam collimating devices 1-8 are arranged on the second sub-beam.
  • the three-dimensional aerial imaging device further includes a water-cooled radiator 6, which is connected to the pulse seed source 1-1, the spectrocoupler 1-2, the pulse amplification module,
  • the pulse compression device and the beam collimation device are used to collimate the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, the pulse compression device, and the beam Device heat dissipation.
  • the pulse seed source 1-1 Since the pulse seed source 1-1 generates a high-energy pulse light source, and the beam passes through the beam splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimator in sequence, the pulse seed The source 1-1, the optical splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimator will generate a lot of heat during the working process.
  • a water-cooled radiator 6 it can be Heat the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimator device to prevent the pulse seed source 1-1, Excessive concentration of heat on the light splitting coupler 1-2, the pulse amplification module, the pulse compression device, and the beam collimation device causes equipment damage.
  • the water-cooling radiator 6 can adjust the heat dissipation area by adjusting the flow direction of the water path, which has strong controllability and can dissipate heat for multiple devices at the same time, and the cost of water cooling is low, the effect is good, and it can meet the heat dissipation requirements of the three-dimensional aerial imaging device.
  • the three-dimensional aerial imaging device further includes: a pulse light source housing, a temperature sensor, and a controller 5.
  • the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimation device are all arranged in the pulse light source housing, and the pulse light source A plurality of light exit ports for the sub-beams to pass through are formed on the housing, that is, the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, and the pulse compression
  • the device and the beam collimating device are sheathed with a pulse light source housing, and the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, and the pulse source are covered by the pulse light source housing.
  • the pulse compression device and the beam collimation device are provided with a light outlet on the pulse light source housing, which can not only use the pulse light source housing to protect the pulse seed source 1-1, the beam splitter 1-2, and the
  • the pulse amplifying module, the pulse compression device and the beam collimation device are not damaged, and the structure is simple, which will not affect the normal transmission of the beam.
  • the temperature sensor is arranged in the pulse light source housing for detecting the temperature inside the pulse light source housing
  • the controller 5 is signally connected to the temperature sensor and the water-cooled radiator 6, and is used to control the The temperature in the housing of the pulse light source.
  • the temperature sensor can be used to detect the temperature of the pulse light source housing, and then feedback the temperature information to the controller 5, and the controller 5 controls the water-cooled radiator 6 to dissipate heat from the equipment in the pulse light source housing. Provide a stable and good working environment for the equipment in the pulse light source housing.
  • the controller 5 signally connects the pulse seed source 1-1, the optical splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimator
  • the device is used to control the output parameters of the sub-beams.
  • the controller 5 can also control the pulse seed source 1-1, the optical splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimator, and control
  • the working states of the pulse seed source 1-1, the beam splitter 1-2, the pulse amplification module, the pulse compression device, and the beam collimation device adjust the output parameters of the sub-beam to ensure that the sub-beam meets Requirements for ionization imaging.
  • the controller 5 can also signal the galvanometer assembly 3, the computer transmits the control program to the controller 5, and the controller 5 controls the galvanometer assembly 3 to adjust the transmission direction of each sub-beam so that the sub-beams converge at a designated position And ionize the air to form a holographic real image 4.
  • the pulse amplifying module includes: a pre-amplifying module and a main amplifying module, and the pre-amplifying module is located between the main amplifying module and the optical splitter 1-2.
  • the pulse amplification module is composed of a pre-amplification module and a main amplification module. The sub-beams first pass through the pre-amplification module and then the main amplification module, which can enhance the amplification effect of the pulse amplification module on the sub-beams.
  • the pulse width of the plurality of sub-beams is 10fs-100ns
  • the pulse energy is 10 ⁇ J-100mJ
  • the pulse repetition frequency is 50Hz-10MHz.
  • first feature and second feature may include one or more of these features.
  • the "above” or “below” of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features not in direct contact but through them Another feature contact between.
  • the second feature of the first feature includes the first feature directly above and diagonally above the second feature, or only means that the first feature is higher than The second feature.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un dispositif d'imagerie aérienne tridimensionnel basé sur une intersection de faisceau lumineux et une ionisation de l'air, comprenant une source de germe d'impulsion (1-1), un coupleur de division de lumière (1-2), une pluralité d'ensembles galvanométriques (3), une pluralité de modules d'amplification d'impulsion, et une pluralité de lignes à retard temporel (2). La source de germe d'impulsion (1-1) génère un faisceau de lumière pulsée ; le coupleur de division de lumière (1-2) est disposé sur une ligne du faisceau de lumière pulsée et utilisé pour diviser le faisceau de lumière pulsée en une pluralité de faisceaux de sous-lumière ; la pluralité d'ensembles galvanométriques (3) est disposée sur des lignes de la pluralité de faisceaux de sous-lumière d'une manière de correspondance univoque et utilisée pour changer les directions d'irradiation des faisceaux de sous-lumière dans une direction horizontale ou verticale ; la pluralité de modules d'amplification d'impulsions est disposée sur les lignes de la pluralité de faisceaux de sous-lumière d'une manière de correspondance un à un et utilisée pour amplifier des impulsions des faisceaux de sous-lumière, et les modules d'amplification d'impulsions sont situés entre les ensembles galvanométriques (3) et le coupleur de division de lumière (1-2) ; la pluralité de lignes à retard temporel (2) est disposée sur les lignes de la pluralité de faisceaux de sous-lumière d'une manière de correspondance un à un, les lignes de retard temporel sont situées entre les modules d'amplification d'impulsion et les ensembles galvanométriques (3), et les lignes de retard temporel sont utilisées pour ajuster les positions de temps d'impulsion des faisceaux de sous-lumière de telle sorte qu'une pluralité de temps d'impulsion coïncident lorsque les faisceaux de sous-lumière se croisent au niveau d'un point d'intersection.
PCT/CN2021/072067 2020-01-16 2021-01-15 Dispositif d'imagerie aérienne tridimensionnel basé sur une intersection d'un faisceau lumineux et une ionisation de l'air WO2021143814A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202020099628.2 2020-01-16
CN202020099628.2U CN211402966U (zh) 2020-01-16 2020-01-16 一种基于光束交汇电离空气的三维空中成像装置
CN202010048276.2 2020-01-16
CN202010048276.2A CN111123552A (zh) 2020-01-16 2020-01-16 一种基于光束交汇电离空气的三维空中成像装置

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WO2021143814A1 true WO2021143814A1 (fr) 2021-07-22

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104317154A (zh) * 2014-11-20 2015-01-28 北京理工大学 一种超快连续成像装置及方法
CN104849868A (zh) * 2015-05-28 2015-08-19 苏州德龙激光股份有限公司 激光激发空气电离的立体显示成像装置及其方法
CN107608570A (zh) * 2017-09-30 2018-01-19 上海理工大学 激光电离空气成像的可触控系统及触控探测方法
CN111123552A (zh) * 2020-01-16 2020-05-08 安徽省东超科技有限公司 一种基于光束交汇电离空气的三维空中成像装置
CN211402966U (zh) * 2020-01-16 2020-09-01 安徽省东超科技有限公司 一种基于光束交汇电离空气的三维空中成像装置
EP3281061B1 (fr) * 2015-04-10 2020-11-18 BAE Systems PLC Procédé et appareil permettant de simuler des dispositifs de modification de trajectoire de rayonnement électromagnétique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104317154A (zh) * 2014-11-20 2015-01-28 北京理工大学 一种超快连续成像装置及方法
EP3281061B1 (fr) * 2015-04-10 2020-11-18 BAE Systems PLC Procédé et appareil permettant de simuler des dispositifs de modification de trajectoire de rayonnement électromagnétique
CN104849868A (zh) * 2015-05-28 2015-08-19 苏州德龙激光股份有限公司 激光激发空气电离的立体显示成像装置及其方法
CN107608570A (zh) * 2017-09-30 2018-01-19 上海理工大学 激光电离空气成像的可触控系统及触控探测方法
CN111123552A (zh) * 2020-01-16 2020-05-08 安徽省东超科技有限公司 一种基于光束交汇电离空气的三维空中成像装置
CN211402966U (zh) * 2020-01-16 2020-09-01 安徽省东超科技有限公司 一种基于光束交汇电离空气的三维空中成像装置

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