CN220915470U - Compact plasma diagnostic system - Google Patents
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- CN220915470U CN220915470U CN202322445064.XU CN202322445064U CN220915470U CN 220915470 U CN220915470 U CN 220915470U CN 202322445064 U CN202322445064 U CN 202322445064U CN 220915470 U CN220915470 U CN 220915470U
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- 230000005540 biological transmission Effects 0.000 claims description 35
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The utility model discloses a novel plasma diagnosis system for laser plasma experiments, in particular to a compact plasma diagnosis system. The compact plasma diagnostic system comprises a laser generating unit, a first beam splitting device, a first signal acquisition unit, a polarization beam splitting device, a second signal acquisition unit, a polarization detection device and a third signal acquisition unit. The compact plasma diagnosis system utilizes the commonality of various physical information diagnosis light paths to degenerate a plurality of light paths, and utilizes one light path to obtain various physical information such as the shape, the electron density, the magnetic field and the like of plasma. In addition, the utility model has novel design and compact structure. On the light path construction, the compact plasma diagnosis system adopts regular triangle arrangement, so that the space between the optical elements can be fully utilized, and the occupied area of the whole system is reduced. The physical information acquisition unit of the compact plasma diagnosis system is positioned at the vertex of the triangle, is very convenient to disassemble, and can freely select a measurement target according to experimental requirements. Meanwhile, the compact plasma diagnosis system is simple to operate, and can ensure high quality and high efficiency of work.
Description
Technical Field
The utility model discloses a novel plasma diagnosis system for laser plasma experiments, in particular to a compact plasma diagnosis system.
Background
When the state of intense laser plasma is studied, it is important to obtain physical information such as the shape, density, and magnetic field of the plasma. In the traditional plasma optical diagnosis system, the function of an optical path is single, and the information utilization rate of probe light is not high enough. When various plasma information is acquired, a plurality of light paths are required to be built, the number of optical elements used is large, and the occupied space is large. With compact plasma diagnostic systems, it is particularly important to obtain a variety of plasma information using one optical path.
In laser plasma diagnostics, the dynamic evolution characteristics of laser plasma are typically studied by adjusting the time difference between the probe light and the driving laser that produces the plasma. The plasma generated by the interaction of the driving laser and the substance is the object to be detected. In order to ensure the uniformity and timeliness of the research, different physical information of the plasma needs to be acquired at the same time, so that the plasma state is accurately judged. In a conventional plasma optical diagnostic system, each piece of physical information corresponds to one optical path, and multiple optical paths are often required to perform parallel measurement in an experiment. For example, the shape of the plasma is obtained using shadow imaging, electron density is measured using a Nomarski interferometer, magnetic field is measured using a faraday rotation, and so forth. This requires a larger space and uses more optical elements. Meanwhile, the process of setting up and debugging the optical path is complex, and more working time is required.
The compact plasma diagnosis system can utilize the commonality of various physical information diagnosis light paths to degenerate a plurality of light paths, so as to realize the measurement of the shape, density and magnetic field information of the plasma on the same light path. On the light path construction, the compact plasma diagnosis system adopts regular triangle arrangement, so that the space between the optical elements can be fully utilized, and the occupied area of the whole system is reduced. The physical information acquisition unit of the compact plasma diagnosis system is positioned at the vertex of the triangle, is very convenient to disassemble, and can freely select a measurement target according to experimental requirements. In addition, for the special case that the number of the acquisition units is limited, the system has the advantages of no need of adjusting the light path and free selection of a measurement target.
Disclosure of Invention
In order to solve the problems that the function of an optical path is single, the information utilization rate of probe light is not high enough, a plurality of optical paths are required to be built when various plasma information is acquired, a plurality of optical elements are used, the occupied space is large and the like in the traditional plasma optical diagnosis system, the invention provides a compact plasma diagnosis system.
The technical scheme adopted for solving the technical problems is as follows:
A compact plasma diagnosis system comprises a laser generating unit, a first beam splitting device, a first signal acquisition unit, a polarization beam splitting device, a second signal acquisition unit, a polarization detection device and a third signal acquisition unit;
The laser generating unit is arranged in front of the object to be detected and is used for generating linear polarized probe light with a known polarization state, and the probe light is transmitted through the object to be detected to form information light;
The first beam splitting device is arranged in the information light transmission direction and is arranged at 60 degrees with the information light. The first beam splitting device splits the information light into first reflected information light and first transmitted information light. The information light and the first reflected information light and the first transmitted information light are in the same plane. The first transmission information light is shape measurement information light;
The first signal acquisition unit is arranged in the transmission direction of the first transmission information light and is used for measuring the shape of an object to be measured;
The polarization beam splitting device is arranged in the transmission direction of the first reflected information light and divides the first reflected information light into two polarization signals which are perpendicular to each other at a small angle. The two polarized signals are still in the same field of view and become second information light;
The second beam splitting device is arranged in the transmission direction of the second information light and is arranged at 60 degrees with the second information light. The second beam splitting device splits the second information light into second reflected information light and second transmitted information light. The second reflected information light and the second transmitted information light both contain two polarization signals in the second information light. The second transmission information light is magnetic field information light;
The second signal acquisition unit is arranged in the transmission direction of the second projection information light, acquires the second transmission information light and measures magnetic field information;
The polarization detection device is arranged in the transmission direction of the second reflected information light, and the polarization axis of the polarization detection device is 45 degrees with the polarization axis of the polarization beam splitting device, so that two polarization signals of the second reflected information light interfere. And the second reflected information light passes through the polarization detection device and is output as electron density information light.
The third signal acquisition unit is arranged in the transmission direction of the electronic density information light in a measuring mode and used for measuring the electronic density information;
The optical paths of the information light, the first reflected information light and the second reflected information light form a regular triangle or an approximate regular triangle;
The shape measurement information light, the magnetic field information light and the electron density information light are respectively collected by the first, second and third signal collecting units on the extension lines of three sides of the triangle.
In one embodiment, the laser generating unit includes a laser and a first polarizing plate disposed in a laser light emitting direction of the laser.
In one embodiment, the first beam splitting device is 2:1 intensity beam splitter, the second beam splitting device is 1:1 intensity beam splitter. The first beam splitting device is matched with the second beam splitting device, so that the first signal acquisition unit, the second signal acquisition unit and the third signal acquisition unit acquire signals with the same intensity.
In one embodiment, the polarization beam splitting device is a Wollaston prism, and forms a Faraday rotation measuring device in cooperation with the light path.
In one embodiment, the polarization detection device is a second polarizer, and the light path and the polarization beam splitting device are matched to form a Nomarski interference device.
In one embodiment, the first signal acquisition unit includes a first imaging lens and a first CCD, the second signal acquisition unit includes a second imaging lens and a second CCD, and the third signal acquisition unit includes a third imaging lens and a third CCD. The first, second and third imaging lenses are disposed in front of the first, second and third CCDs, respectively, for imaging.
The invention also provides a portable compact plasma diagnostic system, characterized in that: including a frame, a base, and any of the compact plasma diagnostic systems described above. The base is arranged below the compact plasma diagnosis system and is used for fixing the compact plasma diagnosis system; the frame encloses and secures the pedestal and the compact plasma diagnostic system.
The invention also provides a detachable compact plasma diagnostic system, characterized in that: comprising a removable base, and any of the compact plasma diagnostic systems described above; the detachable base is arranged below the first, second and third signal acquisition units, so that each signal acquisition unit can be detached or installed at any time, and any one, two or three signals can be selected for acquisition.
The compact plasma diagnosis system has the beneficial effects that the compact plasma diagnosis system utilizes the commonality of various physical information diagnosis light paths to degenerate a plurality of light paths, so that the measurement of the shape, the density and the magnetic field information of plasma can be simultaneously carried out on the same light path. On the light path construction, the compact plasma diagnosis system adopts regular triangle arrangement, so that the space between the optical elements can be fully utilized, and the occupied area of the whole system is reduced. The physical information acquisition unit of the compact plasma diagnosis system is positioned at the vertex of the triangle, is very convenient to disassemble, and can freely select a measurement target according to experimental requirements. In addition, for the special case that the number of the acquisition units is limited, the system has the advantages of no need of adjusting the light path and free selection of a measurement target. The compact plasma diagnosis system can solve the problems that the function of an optical path is single, the information utilization rate of probe light is not high enough, a plurality of optical paths are required to be built when various plasma information is acquired, the number of used optical elements is large, the occupied space is large and the like in the traditional plasma optical diagnosis system. The portable compact plasma diagnosis system is integrated on the frame and the base, a series of tedious operations such as adjusting the placement position and the like can be avoided, and the working efficiency is ensured. The detachable compact plasma diagnosis system enables each signal acquisition unit to be detached or installed at any time, and signals can be selected to be acquired at will.
Drawings
FIG. 1 is a block diagram of a compact plasma diagnostic system according to one embodiment of the invention;
FIG. 2 is a block diagram of a compact plasma diagnostic system according to another embodiment of the invention;
FIG. 3 is an optical path diagram of the compact plasma diagnostic system of the embodiment of FIG. 2 of the present invention;
FIG. 4 is a block diagram of a removable compact plasma diagnostic system according to one embodiment of the invention;
Description of the main reference signs
10: A laser generating unit;
101: a laser;
102: a first polarizing plate;
20: a first beam splitting device;
201: a first beam splitter;
30: a first signal acquisition unit;
301: a first imaging lens;
302: a first CCD;
40: a polarization beam splitting device;
401: wollaston prism;
50: a second beam splitting device;
501: a second beam splitter;
60: a second signal acquisition unit;
601: a second imaging lens;
602: a second CCD;
70: a polarization detection device;
701: a second polarizing plate;
80: a third signal acquisition unit;
801: a third imaging lens;
802: a third CCD;
901: a first detachable base;
902: a second detachable base;
903: and a third detachable base.
Detailed Description
In order to facilitate understanding of the technical means, creation features, achievement of the purposes and efficacy of the present compact plasma diagnostic system, the present system is further described below in conjunction with the specific figures.
FIG. 1 is a block diagram of a compact plasma diagnostic system according to one embodiment of the invention; FIG. 2 is a block diagram of a compact plasma diagnostic system according to another embodiment of the invention; FIG. 3 is a schematic view of the optical path of the compact plasma diagnostic system of the embodiment of FIG. 2 according to the present invention; fig. 4 is a block diagram of a removable compact plasma diagnostic system according to one embodiment of the invention.
As shown in fig. 1, the present embodiment provides a compact plasma diagnostic system including a laser generating unit 10, a first beam splitting device 20, a first signal collecting unit 30, a polarization beam splitting device 40, a second beam splitting device 50, a second signal collecting unit 60, a polarization detecting device 70, and a third signal collecting unit 80. The devices and units are arranged in sequence as described in fig. 1.
In one embodiment, the laser generating unit 10 is configured to generate probe light of a known polarization direction. And the probe light is transmitted through the object to be detected to form information light carrying plasma polarization information.
In one embodiment, the first beam splitting device 20 is disposed at 60 degrees with respect to the information light in the information light transmission direction. The first beam splitting device 20 splits the information light into first reflected information light and first transmitted information light. The information light and the first reflected information light and the first transmitted information light are in the same plane. The first transmission information light is shape measurement information light;
In one embodiment, the first signal acquisition unit 30 is disposed in the transmission direction of the first transmitted information light, and measures the shape of the object to be measured;
In one embodiment, the polarization beam splitting device 40 is disposed in the transmission direction of the first reflected information light, and splits the first reflected information light into two polarization signals perpendicular to each other at a small angle. The two polarized signals are still in the same field of view and become second information light;
In one embodiment, the second beam splitting device 50 is disposed at 60 degrees with respect to the second information light in the transmission direction of the second information light. The second beam splitting device 50 splits the second information light into second reflected information light and second transmitted information light. The second reflected information light and the second transmitted information light both contain two polarization signals in the second information light. The second transmission information light is magnetic field information light;
In one embodiment, the second signal acquisition unit 60 is disposed in the transmission direction of the second projection information light, acquires the second transmission information light, and measures magnetic field information;
In one embodiment, the polarization detection device 70 is disposed in the transmission direction of the second reflected information light, and the polarization axis thereof is 45 degrees with respect to the polarization axis of the polarization beam splitting device 40, so that two polarization signals of the second reflected information light interfere. The second reflected information light passes through the polarization detection device 70 and is output as electron density information light.
In one embodiment, the third signal acquisition unit 80 measures the electron density information disposed in the transmission direction of the electron density information light;
As shown in fig. 2, in one embodiment, the laser generating unit 10 includes: a laser 101 and a first polarizer 102. The first polarizing plate 102 is disposed in the laser light emission direction of the laser 101. The laser 101 may be a semiconductor laser, a gas laser (e.g., helium-neon laser, carbon dioxide laser), or the like. The first polarizing plate 102 converts the laser beam emitted from the laser 101 into linear polarization detection light. The linear polarization detection light generated by the laser generating unit 10 passes through the object to be detected and then is information light.
In one embodiment, the first beam splitting device 20 may be a first beam splitter 201. The first beam splitter 201 is a reflection projection intensity ratio of 2: 1. The first beam splitter 201 is disposed at 60 degrees with respect to the information light, and splits the information light into a first reflected information light and a first transmitted information light. The information light and the first reflected information light and the first transmitted information light are in the same plane. The first transmitted information light is shape measurement information light.
In one embodiment, the first signal acquisition unit 30 includes: a first imaging lens 301 and a first CCD image sensor 302. The first imaging lens 301 is used for imaging, so that the first CCD image sensor 302 obtains an image with a proper size. The first CCD image sensor 302 is configured to collect shape measurement information light. The first CCD image sensor 302 may be an Andor CCD image sensor, an optical PICCD image sensor, or an industrial grade CCD.
In one embodiment, the polarization beam splitting device 40 may be a Wollaston prism 401. The Wollaston prism 401 is arranged in the transmission direction of the first reflected information light, and forms a Faraday rotation measuring device in cooperation with an optical path. The Wollaston prism 401 splits the first reflected information light into two polarized signals perpendicular to each other at a small angle. The two polarized signals remain within the same field of view as the second information light.
In one embodiment, the second beam splitting device 50 may be a second beam splitter 501. The second beam splitter 501 is disposed at 60 degrees with respect to the second information light in the transmission direction of the second information light. The second beam splitter 501 is a reflection projection intensity ratio 1: 1. The second beam splitter 501 cooperates with the first beam splitter 201 to enable the first, second and third signal acquisition units to acquire signals with the same intensity. The second beam splitter 501 splits the second information light into second reflected information light and second transmitted information light. The second reflected information light and the second transmitted information light both contain two polarization signals in the second information light. The second transmitted information light is magnetic field information light.
In one embodiment, the second signal acquisition unit 60 includes: a second imaging lens 601 and a second CCD image sensor 602. The second imaging lens 601 is used for imaging, so that the second CCD image sensor 602 obtains an image with a proper size. The second CCD image sensor 602 is used to collect magnetic field information light. The second CCD image sensor 602 may be an Andor CCD image sensor, an optical PICCD image sensor, or an industrial grade CCD.
In one embodiment, the polarization detection device 70 may be a second polarizer 701. The second polarizer 701 is disposed in the transmission direction of the second reflected information light, and forms a Nomarski interference device in cooperation with the optical path and the wollaston prism 401. The polarization axis of the second reflection information light is 45 degrees to the polarization axis of the polarization beam splitter 40, so that the two polarization signals of the second reflection information light interfere. The second reflected information light passes through the second polarizer 701 and is output as electron density information light. The optical paths of the information light, the first reflected information light, and the second reflected information light form a regular triangle or an approximately regular triangle. The shape measurement information light, the magnetic field information light and the electron density information light are extended on three sides of the triangle.
In one embodiment, the third signal acquisition unit 80 includes: a third imaging lens 801 and a third CCD image sensor 802. The third imaging lens 801 is used for imaging, so that the third CCD image sensor 802 obtains an image of a suitable size. The third CCD image sensor 802 is used to collect electron density information light. The third CCD image sensor 802 may be an Andor CCD image sensor, an optical PICCD image sensor, or an industrial grade CCD.
The operation of the compact plasma diagnostic system will be described with reference to fig. 2 and 3:
The laser 101 emits a laser beam through the first polarizing plate 102 to become linear polarization detection light having a known polarization direction. After the linear polarization detection light passes through the object to be detected, the polarization information of the object to be detected is carried to be information light. The information light is split into first reflected information light and first transmitted information light by the first beam splitter 201.
The first transmitted information light is shape measurement information light. The first transmitted information light is imaged to the first CCD image sensor 302 in a proper size through the first imaging lens 301. The first CCD image sensor 302 collects the shape measurement information light, and finally obtains the shape information of the object to be measured.
The first reflected information light passes through the wollaston prism 401 and is divided into two polarized signals perpendicular to each other at a small angle. The two polarized signals remain within the same field of view as the second information light. The second information light is split into a second reflected information light and a second transmitted information light by the second beam splitter 501. The second reflected information light and the second transmitted information light both contain two polarization signals in the second information light.
The second transmitted information light is magnetic field information light. The second transmitted information light is imaged to the second CCD image sensor 602 in a proper size through the second imaging lens 601. The second CCD image sensor 602 collects the magnetic field information light, and finally obtains the magnetic field information of the object to be measured.
The second reflected information light passes through the second polarizer 701, and the two polarization signals included therein satisfy the interference condition, and is output as electron density information light by interference. The electron density information light is imaged to the third CCD image sensor 802 in a proper size through the third imaging lens 801. The third CCD image sensor 802 collects the electron density information light, and finally obtains the electron density of the object to be measured.
As shown in fig. 4, in one embodiment, the removable compact plasma diagnostic system includes a first removable base 901, a second removable base 902, and a third removable base 903. The first detachable base 901 is disposed under the first imaging lens 301 and the first CCD image sensor 302, the second detachable base 902 is disposed under the second imaging lens 601 and the second CCD image sensor 602, and the third detachable base 903 is disposed under the third imaging lens 801 and the third CCD image sensor 802. The arrangement enables each signal acquisition unit to be detached or installed at any time, and any one, two or three signals can be selected for acquisition according to experimental purposes.
The invention uses the unique structural design to solve the problems that the function of the light path is single and the information utilization rate of the probe light is not high enough when the traditional plasma diagnosis system researches the strong laser plasma state. Meanwhile, when various plasma information is acquired, the traditional diagnosis system needs to build a plurality of light paths, uses a plurality of optical elements and occupies a large space. The compact plasma diagnosis system utilizes the commonality of various physical information diagnosis light paths to degenerate a plurality of light paths, and utilizes one light path to obtain various physical information such as the shape, the electron density, the magnetic field and the like of plasma. On the light path construction, the compact plasma diagnosis system adopts regular triangle arrangement, so that the space between the optical elements can be fully utilized, and the occupied area of the whole system is reduced. The physical information acquisition unit of the compact plasma diagnosis system is positioned at the vertex of the triangle, is very convenient to disassemble, and can freely select a measurement target according to experimental requirements. Meanwhile, the compact plasma diagnosis system is simple to operate and can ensure the working efficiency.
Claims (7)
1. A compact plasma diagnostic system, characterized by: the device comprises a laser generating unit, a first beam splitting device, a first signal acquisition unit, a polarization beam splitting device, a second signal acquisition unit, a polarization detection device and a third signal acquisition unit;
The laser generating unit is arranged in front of the object to be detected and is used for generating linear polarized probe light with a known polarization state, and the probe light is transmitted through the object to be detected to form information light;
The first beam splitting device is arranged in the information light transmission direction and is arranged at an angle of 60 degrees with the information light, the first beam splitting device splits the information light into first reflected information light and first transmitted information light, the first reflected information light and the first transmitted information light are in the same plane, and the first transmitted information light is shape measurement information light;
The first signal acquisition unit is arranged in the transmission direction of the first transmission information light and is used for acquiring the first transmission information light to obtain the shape of an object to be detected;
The polarization beam splitting device is arranged in the transmission direction of the first reflected information light, the first reflected information light is divided into two mutually perpendicular polarization signals at an angle smaller than 10 degrees, and the two polarization signals are still in the same view field and become second information light;
The second beam splitting device is arranged in the transmission direction of the second information light and is arranged at an angle of 60 degrees with the second information light, the second beam splitting device splits the second information light into second reflected information light and second transmitted information light, the second reflected information light and the second transmitted information light both comprise two polarized signals in the second information light, and the second transmitted information light is magnetic field information light;
The second signal acquisition unit is arranged in the transmission direction of the second transmission information light and is used for acquiring the second transmission information light to obtain magnetic field information;
The polarization detection device is arranged in the transmission direction of the second reflected information light, the polarization axis of the polarization detection device forms 45 degrees with the polarization axis of the polarization beam splitting device, so that two polarization signals of the second reflected information light interfere, and the second reflected information light passes through the polarization detection device and is output as electron density information light;
The third signal acquisition unit is arranged in the transmission direction of the electronic density information light in a measuring mode, and acquires the electronic density information light to obtain electronic density information;
The optical paths of the information light, the first reflected information light and the second reflected information light form a regular triangle or an approximate regular triangle;
The shape measurement information light, the magnetic field information light and the electron density information light are respectively collected by the first signal collecting unit, the second signal collecting unit and the third signal collecting unit on the extension lines of three sides of the triangle.
2. The compact plasma diagnostic system according to claim 1, wherein: the laser generating unit comprises a laser and a first polaroid, wherein the first polaroid is arranged in the laser emitting direction of the laser.
3. The compact plasma diagnostic system according to claim 1, wherein: the first beam splitting device is 2:1 intensity beam splitter, the second beam splitting device is 1: the first beam splitting device is matched with the second beam splitting device, so that the first signal acquisition unit, the second signal acquisition unit and the third signal acquisition unit can acquire signals with the same intensity.
4. The compact plasma diagnostic system according to claim 1, wherein: the polarization beam splitting device is a Wollaston prism and is matched with the light path to form a Faraday rotation measuring device.
5. The compact plasma diagnostic system according to claim 1, wherein: the polarization detection device is a second polaroid and is matched with the light path and the polarization beam splitting device to form a Nomarski interference device.
6. The compact plasma diagnostic system according to claim 1, wherein: the first signal acquisition unit comprises a first imaging lens and a first CCD, the second signal acquisition unit comprises a second imaging lens and a second CCD, the third signal acquisition unit comprises a third imaging lens and a third CCD, and the first imaging lens, the second imaging lens and the third imaging lens are respectively arranged in front of the first CCD, the second CCD and the third CCD and are used for imaging.
7. A portable compact plasma diagnostic system, characterized by: comprising a frame, a base, and the compact plasma diagnostic system of any of claims 1-6;
The base is arranged below the compact plasma diagnosis system and is used for fixing the compact plasma diagnosis system;
the frame encloses and secures the pedestal and the compact plasma diagnostic system.
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| CN202322445064.XU CN220915470U (en) | 2023-09-08 | 2023-09-08 | Compact plasma diagnostic system |
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| CN202322445064.XU CN220915470U (en) | 2023-09-08 | 2023-09-08 | Compact plasma diagnostic system |
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