WO2021143817A1

WO2021143817A1 - Air ionization display device

Info

Publication number: WO2021143817A1
Application number: PCT/CN2021/072081
Authority: WO
Inventors: 范超; 韩东成
Original assignee: 安徽省东超科技有限公司
Priority date: 2020-01-16
Filing date: 2021-01-15
Publication date: 2021-07-22

Abstract

An air ionization display device (100), comprising a plurality of pulsed light output units (10). Each pulsed light output unit (10) comprises: a pulsed light source (11), a galvanometer assembly (12) and a lens assembly (13). An output beam of the pulsed light source (11) is adjusted by the galvanometer assembly (12) and is focused by the lens assembly (13) on a focus region of the lens assembly (13) to ionize air to form a holographic real image. The holographic real images of the plurality of pulsed light output units (10) cooperate with each other to form a combined real image.

Description

Air ionization display device

Cross-references to related applications

This application claims the priority of the Chinese patent application numbers "2020100493729" and "2020201031046" filed by Anhui Dongchao Technology Co., Ltd. on January 16, 2020, titled "An Air Power Display Device".

Technical field

The present disclosure relates to the field of air ionization, and in particular, to an air ionization display device.

Background technique

The air ionization display system outputs laser pulses from a high-power pulsed light source, modulates the light field by a spatial light modulator, and then reflects to the galvanometer system to adjust its exit direction. The beam passes through the zoom lens and the flat field focusing lens and is focused to the designated air ionization area. Finally, the high-power laser ionizes the air molecules to form a luminous bright spot. The computer actively controls the spatial light modulator, 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 desired display image. The air ionization display system in the related art is affected by factors such as a galvanometer system and a zoom lens, and the image area of the air ionization display is small, which cannot meet the aerial imaging display requirements of a larger image.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes an air ionization display device, which can expand the range of the imaging area by combining a plurality of pulsed light output units.

The air ionization display device according to an embodiment of the present disclosure includes a plurality of pulsed light output units, each pulsed light output unit includes: a pulsed light source, a galvanometer assembly, and a lens assembly, and the output light beam of the pulsed light source passes through the galvanometer assembly The adjustment effect of the lens assembly and the focusing effect of the lens assembly ionize the air in the focal area of the lens assembly to form a holographic real image, and a plurality of the pulse output units ionize the air to form respective holographic real images that cooperate with each other to form an overall real image.

According to the air ionization display device of the embodiment of the present disclosure, the multiple holographic real images are combined into a whole combined real image by the method of combining multiple pulsed light output units, which can greatly increase the range of the imaging area and improve the air ionization. Display the imaging efficiency of the device.

In addition, the air ionization display device according to the present disclosure may also have the following additional technical features:

According to some embodiments of the present disclosure, the air ionization display device further includes a control computer that is signally connected to a plurality of the pulsed light output units for controlling the imaging state of the holographic real image to form the combined real image.

According to some embodiments of the present disclosure, in a plane direction perpendicular to the connecting line between the holographic real image and the pulsed light output unit, a plurality of the pulsed light output units are arranged in multiple rows and multiple columns.

According to some embodiments of the present disclosure, a part of the plurality of pulsed light output units constitutes an upper pulsed light output unit group, another part of the plurality of pulsed light output units constitutes a lower pulsed light output unit group, and the upper pulsed light output unit The real holographic image formed by the pulsed light output unit in the group is located below the upper pulsed light output unit group, and the real holographic image formed by the pulsed light output unit in the lower pulsed light output unit group is located at the lower pulse Above the light output unit group.

According to some embodiments of the present disclosure, the pulsed light output unit further includes a spatial light modulator located between the pulsed light source and the galvanometer assembly for adjusting the parameters of the light beam.

According to some embodiments of the present disclosure, the pulsed light output unit further includes: a housing, the pulse light source, the galvanometer assembly, and the lens assembly are all arranged in the housing, and the housing is located in the housing. A pulse output port is formed between the lens assembly and the focal point of the lens assembly.

According to some embodiments of the present disclosure, the lens assembly includes a zoom lens and a plan focus lens, and the zoom lens is located between the plan focus lens and the galvo lens assembly.

According to some embodiments of the present disclosure, the pulse width of the pulse light source is 50 fs-100 ns, the pulse energy of the pulse light source is 20 μJ-10 mJ, and the repetition frequency of the pulse light source is 500 Hz-10 MHz.

According to some embodiments of the present disclosure, there are multiple pulsed light sources in the pulsed light output unit, and the pulsed light output unit further includes a beam combiner, a repetition frequency adjustment component, a pulse time delay monitor, and at least one time Delay line.

The light beams of the multiple pulsed light sources mentioned above are all projected on the beam combiner and combined into one beam, the beams emitted by the beam combiner are projected into the galvanometer assembly, and the repetition frequency adjustment assembly is arranged on the The pulsed light source and the beam combiner are used to adjust the repetition frequency of the multiple pulsed light sources, and the pulse time delay monitor is provided between the beam combiner and the galvanometer assembly for monitoring the The pulse delay signal of the beam emitted by the beam combiner, and the time delay line is arranged between the pulse light source and the beam combiner and is connected to the pulse time delay monitor signal for monitoring according to the pulse time delay The feedback information of the device compensates the pulse time delay of the light beam emitted by the pulsed light source.

According to some embodiments of the present disclosure, the repetition frequency adjustment component includes a plurality of photodetectors, a frequency reference source and a servo controller, and the plurality of photodetectors are arranged in a one-to-one correspondence between the plurality of pulsed light sources Used to detect the repetition frequency of the pulsed light source, the frequency reference source is used to provide a frequency reference standard, and the servo controller signals are connected to the photodetector, the frequency reference source and the pulse light source for The feedback signal of the photodetector and the reference frequency signal of the frequency reference source control the repetition frequency of the output pulse of the pulse light source.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic structural diagram of an air ionization display device according to an embodiment of the present disclosure;

Fig. 2 is a schematic structural diagram of a pulsed light output unit according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an air ionization display device according to another embodiment of the present disclosure.

Reference signs:

100: Air ionization display device;

10: Pulse light output unit; 11: Pulse light source; 12: Galvanometer assembly; 13: Lens assembly; 131: Zoom lens; 132: Planar focus lens; 14: Upper pulse light output unit group; 15: Lower pulse light output Unit group

20: Control computer;

30: Spatial light modulator;

40: shell; 41: pulse output port;

50: Display area.

Detailed ways

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present disclosure, and cannot be understood as a limitation to the present disclosure.

Hereinafter, an air ionization display device according to an embodiment of the present disclosure will be described with reference to FIGS. 1-3.

According to some embodiments of the embodiments of the present disclosure, the air ionization display device 100 includes a plurality of pulsed light output units 10, and each pulsed light output unit 10 includes a pulsed light source 11, a galvanometer assembly 12 and a lens assembly 13.

Among them, the output beam of the pulsed light source 11 is projected onto the galvanometer assembly 12. The galvanometer assembly 12 includes two sets of mirrors arranged vertically. The two sets of mirrors respectively make the beam swing back and forth and left and right to control the irradiation of the beam. path. The outgoing beam of the galvanometer assembly 12 is projected onto the lens assembly 13, and the lens assembly 13 focuses the beam. After the beam is concentrated at the focal position of the lens assembly 13, the power density increases, reaching the power threshold of the laser ionized air, and finally a high-power laser The ionized air molecules form luminous bright spots, and then form the holographic real image required by the user. In this process, the real holographic image formed by a single pulsed light output unit 10 has a relatively small range and cannot form a complex pattern required by the user.

To this end, the air ionization display device 100 is provided with multiple pulsed light output units 10, and the holographic real images output by the multiple pulsed light output units 10 cooperate with each other to form a combined real image, thereby greatly increasing the imaging area of the air ionization display device 100, and The pulsed light output unit 10 can be adjusted according to imaging requirements to meet the needs of large-scale imaging and complex imaging.

The air ionization display system in the prior art, due to the galvanometer assembly and zoom lens, etc., the air ionization system can display a small image range, and cannot meet the air display requirements of a larger image. If a high-demand galvanometer assembly is used And lens components need to greatly increase the cost of investment.

According to the air ionization display device 100 of the embodiment of the present disclosure, a combination of multiple pulsed light output units 10 is adopted to combine multiple holographic real images into a whole combined real image, thereby greatly increasing the range of the imaging area and improving the air Compared with the air ionization display system in the prior art, the imaging efficiency of the ionization display device 100 not only increases the range of the imaging area, but also has lower requirements on the galvanometer assembly 12 and the lens assembly 13, which is beneficial to reducing production costs.

The air ionization display device 100 according to the embodiment of the present disclosure also includes a control computer 20. Since the industrial objects faced by many modern control software are no longer simple single-task lines, but more complex multi-task systems, single-task lines can be Only physical methods or simple systems control the entire work process, but in real life more complex multi-tasking systems cannot use physical methods or simple systems to control the entire work process, so a control computer 20 and a control computer 20 are needed. The signal is connected to a plurality of pulsed light output units 10 for controlling the imaging state of the holographic real image to form a combined real image.

The control computer 20 of multiple pulsed light output units 10 is connected by setting signals, and the corresponding control program is set in the control computer 20 to control the pulsed light output unit 10. The control computer 20 can not only adjust the pulsed light output unit 10 according to imaging requirements. The position, structure and other parameters of the formed holographic real image can be adjusted according to the real-time working status of the multiple pulsed light output units 10 to ensure that the holographic real image formed by the multiple pulsed light output units 10 can be smoothly spliced to form a combined real image, and Ensure that the combined real image is displayed or played as required.

As shown in FIG. 2, according to some embodiments of the present disclosure, a plurality of pulsed light output units 10 are arranged in multiple rows and multiple columns in a plane direction perpendicular to the line between the holographic real image and the pulsed light output unit 10, such as pulsed light The output unit 10 forms a holographic real image facing vertically upward. The multiple pulsed light output units 10 are arranged in multiple rows and multiple rows in the horizontal direction. The structure is simple and easy to implement. Moreover, the multiple rows and multiple rows of the pulsed light output units 10 can reduce the overall volume of the air ionization display device 100 and save In addition, it can reduce the interference between two adjacent pulsed light output units 10, prevent the imaging path of two adjacent pulsed light output units 10 from being blocked, and improve the imaging stability of the air ionization display device 100 sex.

As shown in FIG. 3, according to other embodiments of the present disclosure, a part of the plurality of pulsed light output units 10 constitutes the upper pulsed light output unit group 14, and the other part of the plurality of pulsed light output units 10 constitutes the lower pulsed light output. Unit group 15, the holographic real image formed by the pulse light output unit 10 in the upper pulse light output unit group 14 is located below the upper pulse light output unit group 14, and the hologram formed by the pulse light output unit 10 in the lower pulse light output unit group 15 The real image is located above the undershoot light output unit group 15.

That is, the combined real image formed by the air ionization display device is located between the upper pulsed light output unit group 14 and the lower pulsed light output unit group 15, and the pulsed light output unit in the upper pulsed light output unit group 14 is projected downward to form a holographic real image , The pulsed light output unit in the lower pulsed light output unit group 15 is projected upward to form a holographic real image, and the holographic real image formed by the upper pulsed light output unit group 14 and the lower pulsed light output unit group 15 is in the upper pulsed light output unit group 14 and the lower pulsed light output unit group 14 The light output unit groups 15 collectively form a combined real image.

By providing the upper pulsed light output unit group 14 and the lower pulsed light output unit group 15, the three-dimensional height of the combined real image can be increased, and the upper pulsed light output unit group 14 and the lower pulsed light output unit group 15 will not interfere with each other.

According to some embodiments of the present disclosure, the pulsed light output unit 10 further includes: a housing 40. The pulse light source 11, the galvanometer assembly 12, and the lens assembly 13 are all arranged in the housing 40. The housing 40 is located between the lens assembly 13 and the lens. The part between the focal points of the component 13 is formed with a pulse output port 41, and the pulse beam can be projected on the display area 50 through the pulse output port 41. By providing the housing 40, not only can the pulse light source 11, the galvanometer assembly 12 and the lens assembly 13 be protected from damage, but also the structural integrity of the pulse light output unit 10 can be improved. Furthermore, the pulse light output unit with the housing 40 10. The arrangement process is more convenient, and the circuit structure is simple, which provides convenience for the combination of multiple pulsed light output units 10.

According to some embodiments of the present disclosure, the lens assembly 13 includes a zoom lens 131 and a plan focus lens 132. The zoom lens 131 is located between the plan focus lens 132 and the galvanometer assembly 12. The high-power pulsed light source 11 outputs laser pulses that undergo spatial light modulation. The light field is modulated by the optical device 30, and then reflected to the galvanometer assembly 12 to adjust its exit direction. The light beam passes through the zoom lens 131 and the flat field focusing lens 132 and then focuses to a designated point in the air ionization area. Finally, the high-power laser ionizes the air molecules to form a bright spot. .

The zoom lens 131 can adjust the distance between the focus and the zoom lens 131 according to the imaging requirements, and then can generate a three-dimensional holographic real image and a combined real image by adjusting the focus position. The flat field focusing lens 132 and the zoom lens 131 can be used to cooperate with the zoom lens 131 to prevent holography. The real image and the combined real image are bent and deformed during the imaging process. The control computer 20 actively controls the spatial light modulator 30, the galvanometer assembly 12, and the lens assembly 13, and adjusts the position of the laser ionization point and the pixels of the display image according to the desired display image.

According to some embodiments of the present disclosure, the pulsed light output unit 10 further includes a spatial light modulator 30. The spatial light modulator 30 modulates the spatial distribution of light waves. The spatial light modulator 30 contains many independent units that are arranged in one dimension in space. Or a two-dimensional array, each unit can independently receive the control of optical or electrical signals, and change its own optical properties (transmittance, reflectance, refractive index, etc.) according to this signal, so as to carry out the control of the light waves passing through it. modulation. The spatial light modulator 30 is located between the beam combiner and the galvanometer assembly 12. When the beam passes through the spatial light modulator 30, its optical parameters (amplitude, intensity, phase or polarization state) are affected by the various units of the spatial light modulator 30. Modulation, the result becomes a beam of output light with a new spatial distribution of optical parameters.

By setting the spatial light modulator 30, the parameters such as the amplitude, phase and polarization state of the light beam generated by the pulsed light source 11 are adjusted. The light beam passes through the spatial light modulator 30 to modulate the light field, and forms multiple focal points after passing through the lens assembly. This can increase the image quality of the displayed picture.

According to some embodiments of the present disclosure, the repetition frequency of the multiple pulsed light output units 10 is the same, the pulse width of the pulsed light source 11 is 50fs-100ns, the pulse energy of the pulsed light source 11 is 20μJ-10mJ, and the repetition frequency of the pulsed light source 11 is 500Hz -10MHz, the light beam generated by the pulsed light source 11 in the above range can improve the imaging effect and pixels of the holographic real image, and the pulsed light output unit 10 with the same repetition frequency can provide convenience for the combination of the holographic real image.

According to some embodiments of the present disclosure, there are multiple pulsed light sources 11 in the pulsed light output unit 10, and the pulsed light output unit 10 further includes a beam combiner, a repetition frequency adjustment component, a pulse time delay monitor, and at least one time delay line.

Among the multiple pulsed light sources 11, each pulsed light source 11 generates a pulsed light beam. After reflection, the multiple light beams of the multiple pulsed light sources 11 are projected on the beam combiner and merged into one beam, which is combined by the beam combiner. The latter beam is projected into the light field control component, and the light field control component adjusts and aggregates the light beam and ionizes the air in the display area 50 to form a holographic real image.

The repetition frequency adjustment component is arranged between the pulse light source 11 and the beam combiner to adjust the repetition frequency of the multiple pulse light sources 11, and the repetition frequency adjustment component is signally connected to the multiple pulse light sources 11, and can receive the projection of the multiple pulse light sources 11 The pulse repetition frequency signal of the light beam is output, and then the pulse light source 11 is adjusted according to the received repetition frequency signal. The repetition frequency of the pulsed light source 11 refers to the number of laser pulses generated by the pulsed light source 11 per second, and the pulse repetition frequency of the multiple light beams emitted by the multiple pulsed light sources 11 can be strictly locked at the same value through the repetition frequency adjustment component.

The pulse time delay monitor is installed between the beam combiner and the light field control component to monitor the pulse delay signal of the beam emitted by the beam combiner. The light beams generated by different pulsed light sources 11 have different paths to the beam combiner, for example, a pulsed light source The beam generated by 11 irradiates the beam combiner in a straight line, and the beam generated by the other pulsed light source 11 is reflected once and then irradiated on the beam combiner, so that the beams generated by the two pulsed light sources 11 have a pulse time delay after the beam is combined. Through the time delay line provided between the pulse light source 11 and the beam combiner and connected to the pulse time delay monitor signal, the light beam generated by the pulse light source 11 is compensated for the optical path difference caused by the pulse transmission according to the feedback signal of the pulse time delay monitor And the pulse delay caused by the low frequency jitter of the repetition frequency, so that the two pulses are synchronized in time after the beam is combined.

When the light beams generated by multiple pulsed light sources 11 pass through the beam combiner to form a beam, the light beams generated by one pulsed light source 11 may pass through the beam combiner, and the light beams generated by the other pulsed light sources 11 may be reflected and passed through the beam combiner. Combining light beams allows the light beam passing through the beam combiner to be used as a reference to adjust the combined light beams after reflection.

At this time, the number of reflected light beams is one less than the number of pulsed light sources 11, so the number of time delay lines is one less than the number of pulsed light sources 11. The time delay lines correspond to the same number of pulsed light sources 11 one to one, and each delay line controls A pulsed light source 11 generates the pulse delay of the light beam, so that the light beams generated by multiple pulsed light sources 11 can be combined into a pulsed beam when passing through the beam combiner, preventing the combined beam from having the instantaneous power of the combined light due to the pulse delay. It is superimposed to the highest to affect the air ionization imaging.

According to some embodiments of the present disclosure, the repetition frequency adjustment component includes a plurality of photodetectors, a frequency reference source, and a servo controller.

Wherein, there may be multiple photodetectors and the number is the same as the number of pulsed light sources 11. The photodetectors are correspondingly arranged between the pulsed light source 11 and the beam combiner for detecting the repetition frequency of the pulses output by the pulsed light source 11. The frequency reference source is used to provide the frequency reference standard for the servo controller. The servo controller signal is connected to the photodetector, the frequency reference source and the pulse light source 11. The light beam hits the photodetector corresponding to the pulse light source 11 to generate a feedback signal. The servo controller can control the pulse light source according to the feedback signal of the photodetector 11 Output pulse repetition frequency. After the servo controller receives the pulse repetition frequency parameter of the pulsed light source 11 fed back by the photodetector, compares it with the frequency parameter provided by the frequency reference source. If the pulsed light source 11 output pulse repetition frequency parameter does not meet the requirements, the pulsed light source 11 Adjust until the output pulse repetition frequency parameter of the pulse light source 11 meets the requirements.

Other configurations and operations according to the embodiments of the present disclosure are known to those of ordinary skill in the art, and will not be described in detail here.

In the description of the present disclosure, “first feature” and “second feature” may include one or more of these features.

In the description of the present disclosure, "plurality" means two or more.

In the description of the present disclosure, 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.

In the description of the present disclosure, “above”, “above” and “above” 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.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. means to incorporate the implementation The specific features, structures, materials or characteristics described by the examples or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example.

Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

An air ionization display device, characterized in that it comprises:

A plurality of pulsed light output units, the pulsed light output unit includes: a pulsed light source, a galvanometer assembly and a lens assembly, the output beam of the pulsed light source is adjusted by the galvanometer assembly and the focusing effect of the lens assembly The focal area of the lens assembly ionizes the air to form a holographic real image;

Wherein, the holographic real images of a plurality of the pulse output units cooperate with each other to form a combined real image.
The air ionization display device of claim 1, further comprising:

A control computer, which is signally connected to a plurality of the pulsed light output units, and is used to control the imaging state of the holographic real image to form the combined real image.
The air ionization display device according to claim 1 or 2, characterized in that, in a plane direction perpendicular to the connecting line between the holographic real image and the pulsed light output unit, a plurality of the pulsed light output units form Arrange in multiple rows and columns.
The air ionization display device according to claim 1 or 2, wherein a part of the plurality of pulsed light output units constitutes an upper pulsed light output unit group, and the other part of the plurality of pulsed light output units constitutes a lower pulsed light output Unit group, the holographic real image formed by the pulsed light output unit in the upper pulsed light output unit group is located below the upper pulsed light output unit group, and the pulsed light output in the lower pulsed light output unit group The holographic real image formed by the unit is located above the lower pulse light output unit group.
The air ionization display device of claim 1, wherein the pulsed light output unit further comprises: a housing, and the pulse light source, the galvanometer assembly, and the lens assembly are all arranged in the housing A pulse output port is formed in the portion of the housing between the lens assembly and the focal point of the lens assembly.
4. The air ionization display device of claim 1, wherein the lens assembly comprises a zoom lens and a plan focus lens, and the zoom lens is located between the plan focus lens and the galvanometer assembly.
The air ionization display device according to claim 6, wherein the pulsed light output unit further comprises: a spatial light modulator, and the spatial light modulator is located between the pulsed light source and the galvanometer assembly. To adjust the parameters of the beam.
The air ionization display device according to claim 1, wherein the pulse width of the pulsed light source is 50fs-100ns, the pulse energy of the pulsed light source is 20μJ-10mJ, and the repetition frequency of the pulsed light source is 500Hz- 10MHz.
The air ionization display device according to claim 1, wherein the pulsed light source in the pulsed light output unit is multiple, and the pulsed light output unit further comprises:

A beam combiner, the light beams of a plurality of the pulse light sources are projected on the beam combiner and combined into one beam, and the light beams emitted by the beam combiner are projected into the galvanometer assembly;

A repetition frequency adjustment component, the repetition frequency adjustment component is arranged between the pulse light source and the beam combiner for adjusting the repetition frequency of the multiple pulse light sources;

A pulse time delay monitor, which is arranged between the beam combiner and the galvanometer assembly for monitoring the pulse delay signal of the beam emitted by the beam combiner;

At least one time delay line, the time delay line is arranged between the pulse light source and the beam combiner and is connected to the pulse time delay monitor signal, and is used for the feedback information of the pulse time delay monitor Compensate the pulse time delay of the light beam emitted by the pulse light source.
8. The air ionization display device of claim 9, wherein the repetition frequency adjustment component comprises:

A plurality of photodetectors, and the plurality of photodetectors are arranged in one-to-one correspondence between the plurality of pulsed light sources for detecting the repetition frequency of the pulsed light source;

A frequency reference source, where the frequency reference source is used to provide a frequency reference standard;

Servo controller, the servo controller signally connects the photodetector, the frequency reference source and the pulse light source, and is used for controlling according to the feedback signal of the photodetector and the reference frequency signal of the frequency reference source The output pulse repetition frequency of the pulse light source.