CN111157606A - Three-dimensional aerial imaging device based on strong laser ionized air - Google Patents
Three-dimensional aerial imaging device based on strong laser ionized air Download PDFInfo
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- CN111157606A CN111157606A CN202010048279.6A CN202010048279A CN111157606A CN 111157606 A CN111157606 A CN 111157606A CN 202010048279 A CN202010048279 A CN 202010048279A CN 111157606 A CN111157606 A CN 111157606A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/626—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas
- G01N27/628—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas and a beam of energy, e.g. laser enhanced ionisation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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Abstract
The invention discloses a three-dimensional aerial imaging device based on strong laser ionized air, which comprises: the device comprises a pulse light source, an optical shutter, a vibrating mirror assembly, a lens assembly and a controller, wherein pulse light beams generated by the pulse light source are irradiated out through a light outlet, the optical shutter is arranged at the light outlet and used for opening or closing the light outlet, the vibrating mirror assembly is arranged on an irradiation path of the pulse light beams and used for changing the irradiation direction of the pulse light beams in the horizontal or vertical direction, the lens assembly is used for focusing the pulse light beams reflected by the vibrating mirror assembly to ionize air at a position corresponding to an imaging area to form a holographic real image, and the controller is in signal connection with the pulse light source and the optical shutter and adjusts the brightness of an ionization light-emitting point by controlling the energy of pulse light source output pulses and the closing of the optical shutter. The optical shutter is matched with the pulse light source, the brightness of different positions in holographic imaging can be controlled, the picture feeling and the layering feeling of the holographic imaging can be displayed by utilizing the matching of the brightness, and the display effect of an air ionization display picture can be further improved.
Description
Technical Field
The invention relates to the field of air display, in particular to a three-dimensional aerial imaging device based on strong laser ionized air.
Background
The existing air ionization system comprises a high-power pulse light source, a light beam regulation and control module and an air ionization module, wherein the light beam regulation and control module comprises a two-dimensional high-speed scanning galvanometer and a lens assembly consisting of a zoom lens and a flat-field focusing lens. The galvanometer system is formed by combining galvanometers in the x direction and the y direction, and can enable the reflected light beams to scan in the x direction and the y direction in a plane; the zoom lens changes the position of the ionization region in the z direction by changing the focal length of the lens, and can control the position of the ionization region to change in a three-dimensional space by combining the x-direction galvanometer and the y-direction galvanometer; the flat field focusing lens controls the light beam to form a focusing light spot with uniform size in the whole plane, and the light spot distortion is restrained. In order to increase the pixels of the display picture, a spatial light modulator is added in a light beam regulation and control system, the purpose of light wave modulation is achieved by modulating parameters such as amplitude, phase, polarization state and the like of a light field, and light beams modulated by the spatial light modulator form a plurality of focusing points after passing through a focusing module, so that the pixels of the display picture are increased.
However, in actual picture display, there are also display requirements of discontinuous images and display requirements of different display brightness requirements of different areas of the picture, so the device of the present invention solves the above requirements by controlling the discontinuity and the brightness of the ionization bright point, and improves the display effect.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the three-dimensional aerial imaging device based on the strong laser ionized air can improve the display effect of an air ionization display picture by adjusting the interruption and the brightness of the ionized bright light spots at different positions of an imaging area.
The three-dimensional aerial imaging device based on the strong laser ionized air comprises: pulse light source, optical shutter, the mirror subassembly that shakes, lens subassembly and controller, be equipped with the light-emitting window on the pulse light source, the pulse beam that pulse light source produced passes through the light-emitting window shines out, the optical shutter is established light-emitting window department is used for opening or closing the light-emitting window, the mirror subassembly that shakes is established be used for changing on pulse beam's the irradiation route in level or vertical direction pulse beam's irradiation direction, thereby the lens subassembly is used for right the pulse beam focus that the mirror subassembly that shakes reflects out makes the air take place the ionization in the position that corresponds and form holographic real image, controller signal connection pulse light source with the optical shutter, and the optical shutter is closed adjust during the light-emitting window pulse beam's energy.
According to the three-dimensional aerial imaging device based on the strong laser ionized air, the optical shutter is matched with the pulse light source, the brightness of different positions in holographic imaging can be controlled, the picture sense and the layering sense of the holographic imaging can be increased by matching the brightness, and the display effect of the air ionized display picture can be improved.
According to some embodiments of the invention, further comprising: and the beam expanding lens is arranged between the pulse light source and the optical shutter and is used for controlling the beam waist spot size of the light beam.
According to some embodiments of the invention, further comprising: and the photoelectric detector is arranged between the pulse light source and the optical shutter and is used for monitoring the average power of the output pulse of the pulse light source.
According to some embodiments of the present invention, a beam splitter is disposed between the pulsed light source and the optical shutter, and the beam splitter is configured to reflect a portion of the light beam output by the pulsed light source onto the plurality of photodetectors.
According to some embodiments of the invention, further comprising: and the spatial light modulator is arranged between the pulse light source and the galvanometer component and is used for adjusting parameters of the pulse light beam.
According to some embodiments of the invention, further comprising: the radiator is arranged between the pulse light source and the optical shutter and used for reducing heat accumulation generated when the optical shutter blocks the pulse light beam.
According to some embodiments of the present invention, the light transmittance of the light splitter is A, and A is more than or equal to 0.99 and less than or equal to 0.995.
According to some embodiments of the invention, the lens assembly comprises a zoom lens and a field flattening focus lens, the zoom lens being located between the field flattening focus lens and the galvanometer assembly.
According to some embodiments of the invention, the repetition frequency of the plurality of pulsed light sources is the same, the pulse width of the pulsed light source is 50fs-100ns, the pulse energy of the pulsed light source is 1 muj-200 mJ, and the repetition frequency of the pulsed light source is 50Hz-50 MHz.
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The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
the above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a three-dimensional aerial imaging device based on air ionization by intense laser according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a pulsed light source according to an embodiment of the present invention.
Reference numerals:
1: a pulsed light source; 1-2: a light splitting sheet; 1-3: a photodetector; 2: a beam expander; 3: an optical shutter; 4: a heat sink; 5: a spatial light modulator; 6: a galvanometer component; 7: a lens assembly; 8: a holographic real image; 9: and a controller.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A three-dimensional aerial imaging device based on intense laser ionized air according to an embodiment of the present invention is described below with reference to fig. 1 and 2.
As shown in FIG. 1, the three-dimensional aerial imaging device based on strong laser ionized air according to the embodiment of the invention comprises: the device comprises a pulse light source 1, an optical shutter 3, a galvanometer assembly 6, a lens assembly 7 and a controller 9.
Wherein, pulsed light source 1 can include casing and laser generator, and laser generator produces the pulse light beam, is equipped with the light-emitting window on the casing, and the light beam shines out through the light-emitting window, laser generator signal connection controller 9, and controller 9 control laser generator produces the energy of light beam. The optical shutter 3 is disposed at the light outlet for opening or closing the light outlet, and the optical shutter 3 may be disposed on the housing of the pulsed light source 1 and adjacent to the light outlet.
The galvanometer assembly 6 is arranged on an irradiation path of the pulse light beam and used for changing the irradiation direction of the pulse light beam in the horizontal or vertical direction, and the lens assembly 7 is used for focusing the pulse light beam reflected by the galvanometer assembly 6 so as to ionize the air at a corresponding position to form a holographic real image 8. That is, the light beam irradiates onto the galvanometer assembly 6 through the light outlet, and the galvanometer assembly 6 reflects the light beam, so as to control the irradiation direction of the light beam; the light beam passes through the lens component 7, and under the focusing action of the lens component 7, the light beam is focused at the focus position to enable the diameter of the light spot to reach a minimum value, and at the moment, the power in a unit area of the laser is rapidly increased and reaches an air ionization threshold value, so that air around the focus is ionized and forms a light spot. The galvanometer component 6 changes the position of the ionizing light spot by changing the reflection direction of the light beam, and because the process that the galvanometer drives the light spot to move is extremely fast, the next focus point is ionized to form the light spot before the previous light spot disappears, and therefore the holographic real image 8 can be formed by scanning near the focus of the lens component 7.
Further, the controller 9 signal-connects the pulsed light source 1 and the optical shutter 3, and adjusts the energy of the pulsed light beam when the optical shutter 3 closes the light exit. That is, during the process that the light beam passes through the optical shutter 3 to the galvanometer assembly 6 and then the galvanometer assembly 6 and the lens assembly 7 cooperate to form an image, the optical shutter 3 can control the light beam to be cut off, and during the time that the optical shutter 3 blocks the light beam, the controller 9 controls the pulse light source 1 to adjust the energy of the light beam, so that the brightness of the formed light spot at the next ionization point can be controlled.
Therefore, according to the three-dimensional aerial imaging device based on the strong laser ionized air, the optical shutter 3 is matched with the pulse light source 1, the brightness of different positions in a holographic imaging image can be controlled, the picture sense and the layering sense of the holographic imaging can be increased by matching the brightness, and the display effect of an air ionized display picture can be improved.
According to some embodiments of the invention, further comprising: beam expander 2, beam expander 2 establishes the beam waist facula size that is used for control light beam between pulsed light source 1 and optical shutter 3, the light beam that pulsed light source 1 produced passes beam expander 2 and shines optical shutter 3 departments, beam expander 2 can increase the beam waist facula area of light beam, thereby can reduce the unit area light power parameter of facula and improve the life of components and parts, cooperate 7 parameter optimization of lens subassembly simultaneously, thereby further reduce the size of focus light focus and reduce air ionization's pulse energy threshold value.
According to some embodiments of the invention, further comprising: the photoelectric detector 1-3, the photoelectric detector 1-3 is set up and used for detecting the output pulse light beam power of the pulse light source 1 between optical shutter 3 and the pulse light source 1, the light beam that the pulse light source 1 produces shines on the photoelectric detector 1-3 and detects the light beam power of shining, can learn the power of the light beam that the pulse light source 1 outputs through the conversion of the beam split ratio. In the process of beam ionization imaging, the photoelectric detector 1-3 can monitor the power of the pulse light source 1 in real time, and prevent the power fluctuation of the pulse light source 1 from influencing the imaging effect.
As shown in fig. 2, in some embodiments, a light splitter 1-2 is disposed between the pulsed light source 1 and the optical shutter 3, the light splitter 1-2 is used for partially reflecting the output light beam of the pulsed light source 1 to the plurality of photodetectors 1-3, the light splitter 1-2 is disposed across the extending direction of the light beam, the light beam generated by the pulsed light source 1 is irradiated on the light splitter 1-2, most of the light beam passes through the light splitter 1-2 and is irradiated to the optical shutter 3 for imaging, and a small amount of the light beam is irradiated to the photodetectors 1-3 under the effect of the reflection of the light splitter 1-2.
Through setting up the beam splitting piece 1-2, not only can provide convenience for photoelectric detector 1-3 detects the power of pulsed light source 1, can also simplify imaging device's structural design, prevent that photoelectric detector 1-3 from sheltering from the light beam and influencing the formation of image effect, beam splitting piece 1-2 simple structure moreover realizes easily.
According to some embodiments of the invention, further comprising: and the spatial light modulator 5 is arranged between the pulse light source 1 and the galvanometer component 6 and used for adjusting parameters of the pulse light beam. The spatial light modulator 5 modulates the spatial distribution of the light wave, and the spatial light modulator 5 comprises a plurality of independent cells which are spatially arranged in a one-dimensional or two-dimensional array, and each cell can independently receive a light signal or control of an electric signal and change its own optical property (transmittance, reflectance, refractive index, etc.) according to the signal, thereby modulating the light wave passing through it. The spatial light modulator 5 is located between the optical shutter 3 and the galvanometer assembly 6, and when a light beam passes through the spatial light modulator 5, its optical parameters (amplitude, intensity, phase or polarization state) are modulated by the units of the spatial light modulator 5, and as a result, it becomes an output light with a new spatial distribution of optical parameters.
By arranging the spatial light modulator 5, parameters such as amplitude, phase and polarization state of the light beam generated by the pulse light source 1 are adjusted, the light beam modulates a light field through the spatial light modulator 5, and a plurality of focusing points are formed after the light beam passes through the lens assembly 7, so that the imaging quality of the three-dimensional figure can be improved.
As shown in fig. 1, according to some embodiments of the invention, further comprising: and the heat radiator 4 is arranged between the pulse light source 1 and the optical shutter 3, and is used for radiating heat accumulation generated when the optical shutter 3 blocks the pulse light beam.
In the embodiment, the light beam generated by the pulse light source 1 can irradiate the optical shutter 3, the light is absorbed when the optical shutter 3 blocks the light beam, so that the heat of the optical shutter 3 is slowly accumulated, and the optical shutter 3 is promoted to dissipate the heat by arranging the heat sink 4, so that the optical shutter 3 can be prevented from being damaged due to overhigh temperature. Both the optical shutter 3 and the heat sink 4 may be disposed on the housing of the pulsed light source 1.
According to some embodiments of the present invention, the light transmittance of the beam splitter 1-2 is A, 0.99. ltoreq. A.ltoreq.0.995. That is to say, when the light beam irradiates on the light splitting sheet 1-2, 99% -99.5% of the light beam passes through the light splitting sheet 1-2 and irradiates on the optical shutter 3 for ionization imaging, and 0.5% -1% of the light beam irradiates on the photoelectric detector 1-3 for detecting the power of the light beam, and as the light quantity required by the photoelectric detector 1-3 in the process of detecting the power of the light beam is lower, the energy of the light beam in an ionization area can be improved, and the imaging effect can be further improved.
According to some embodiments of the present invention, the lens assembly 7 includes a zoom lens and a flat field focusing lens, the zoom lens is located between the flat field focusing lens and the galvanometer assembly 6, the high power pulsed light source 1 outputs laser pulses, the laser pulses are modulated by the spatial light modulator 5 to form a light field, the light field is then reflected to the galvanometer assembly 6 to adjust the emitting direction of the laser pulses, the light beam passes through the zoom lens and the flat field focusing lens and then is focused to a designated point in an air ionization region, and finally the high power laser ionizes air molecules to form a luminescent spot.
The zoom lens can adjust the distance between a focus and the zoom lens according to imaging requirements, further can generate a holographic real image 8 with a three-dimensional structure by adjusting the position of the focus, can prevent the holographic real image 8 from bending and deforming in the imaging process by utilizing the matching of the flat-field focusing lens and the zoom lens, controls the computer to actively control the spatial light modulator 5, the galvanometer component 6 and the lens component 7, and adjusts the position of a laser ionization point and pixels of a display picture according to the picture to be displayed.
According to some embodiments of the present invention, the repetition frequency of the plurality of pulsed light sources 1 is the same, the pulse width of the pulsed light source 1 is 50fs to 100ns, the pulse energy of the pulsed light source 1 is 1 muJ to 200mJ, and the repetition frequency of the pulsed light source 1 is 50Hz to 50 MHz.
Other constructions and operations according to embodiments of the invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A three-dimensional aerial imaging device based on strong laser ionized air is characterized by comprising:
the light source device comprises a pulse light source (1), wherein a light outlet is formed in the pulse light source (1), and a pulse light beam generated by the pulse light source (1) irradiates through the light outlet;
the optical shutter (3) is arranged at the light outlet and used for opening or closing the light outlet;
the galvanometer assembly (6) is arranged on an irradiation path of the pulse light beam and used for changing the irradiation direction of the pulse light beam in the horizontal or vertical direction;
a lens assembly (7), wherein the lens assembly (7) is used for focusing the pulse light beam reflected by the galvanometer assembly (6) so as to ionize the air at a corresponding position to form a holographic real image (8);
a controller (9), wherein the controller (9) is in signal connection with the pulse light source (1) and the optical shutter (3) and adjusts the energy of the pulse light beam when the optical shutter (3) closes the light outlet.
2. The intense laser ionized air based three-dimensional aerial imaging apparatus according to claim 1, further comprising:
the beam expander (2), establish beam expander (2) be used for controlling between pulsed light source (1) and optical shutter (3) beam waist facula size of light beam.
3. The intense laser ionized air based three-dimensional aerial imaging apparatus according to claim 1, further comprising:
the photoelectric detector (1-3), the photoelectric detector (1-3) is arranged between the pulse light source (1) and the optical shutter (3) and is used for monitoring the average power of the output pulse of the pulse light source (1).
4. The intense laser ionized air based three-dimensional aerial imaging device according to claim 3, wherein a light splitting sheet (1-2) is arranged between the pulsed light source (1) and the optical shutter (3), and the light splitting sheet (1-2) is used for reflecting the output beam part of the pulsed light source (1) to the plurality of photodetectors (1-3).
5. The intense laser ionized air based three-dimensional aerial imaging apparatus according to claim 4, further comprising:
the spatial light modulator (5) is arranged between the pulse light source (1) and the galvanometer component (6) and used for adjusting light field parameters of the pulse light beam.
6. The intense laser ionized air based three-dimensional aerial imaging apparatus according to claim 4, further comprising:
the radiator (4) is arranged between the pulse light source (1) and the optical shutter (3) and used for reducing heat accumulation generated when the optical shutter (3) shields the pulse light beam.
7. The three-dimensional aerial imaging device based on intense laser ionized air according to claim 4, wherein the light transmittance of the light splitting sheets (1-2) is A, and A is more than or equal to 0.99 and less than or equal to 0.995.
8. The intense laser ionized-air based three-dimensional aerial imaging device according to claim 1, wherein the lens assembly (7) comprises a zoom lens and a flat-field focusing lens, and the zoom lens is located between the flat-field focusing lens and the galvanometer assembly (6).
9. The three-dimensional aerial imaging device based on air ionized by strong laser according to any one of claims 1 to 8, wherein the repetition frequency of a plurality of the pulse light sources (1) is the same, the pulse width of the output pulse of the pulse light source (1) is 5fs to 100ns, the pulse energy is 1 muJ to 200mJ, and the pulse repetition frequency is 50Hz to 50 MHz.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048279.6A CN111157606A (en) | 2020-01-16 | 2020-01-16 | Three-dimensional aerial imaging device based on strong laser ionized air |
| PCT/CN2021/072075 WO2021143815A1 (en) | 2020-01-16 | 2021-01-15 | Three-dimensional aerial imaging device based on strong-laser air ionization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010048279.6A CN111157606A (en) | 2020-01-16 | 2020-01-16 | Three-dimensional aerial imaging device based on strong laser ionized air |
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| CN111157606A true CN111157606A (en) | 2020-05-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143815A1 (en) * | 2020-01-16 | 2021-07-22 | 安徽省东超科技有限公司 | Three-dimensional aerial imaging device based on strong-laser air ionization |
| CN113930607A (en) * | 2021-09-07 | 2022-01-14 | 中国科学院宁波材料技术与工程研究所 | Self-adaptive distributed laser shock peening processing system and method |
| WO2023280199A1 (en) * | 2021-07-07 | 2023-01-12 | 安徽省东超科技有限公司 | Three-dimensional display apparatus and control method therefor |
-
2020
- 2020-01-16 CN CN202010048279.6A patent/CN111157606A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143815A1 (en) * | 2020-01-16 | 2021-07-22 | 安徽省东超科技有限公司 | Three-dimensional aerial imaging device based on strong-laser air ionization |
| WO2023280199A1 (en) * | 2021-07-07 | 2023-01-12 | 安徽省东超科技有限公司 | Three-dimensional display apparatus and control method therefor |
| CN113930607A (en) * | 2021-09-07 | 2022-01-14 | 中国科学院宁波材料技术与工程研究所 | Self-adaptive distributed laser shock peening processing system and method |
| CN113930607B (en) * | 2021-09-07 | 2023-01-31 | 中国科学院宁波材料技术与工程研究所 | Self-adaptive distributed laser shock peening processing system and method |
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