Single-particle polarized optical property and optical particle size spectrum measuring system
阅读说明:本技术 一种单颗粒物偏振光学性质和光学粒径谱测量系统 (Single-particle polarized optical property and optical particle size spectrum measuring system ) 是由 潘小乐 田雨 王自发 于 2019-10-21 设计创作,主要内容包括:本发明公开了一种单颗粒物偏振光学性质和光学粒径谱测量系统,包括主测量模块、入射光准直模块、第一散射光强探测模块、第二散射光强探测模块和偏振光信号探测模块;主测量模块内部设置有球形的主测量腔;入射光准直模块与第二散射光强探测模块相对设置;第一散射光强探测模块和偏振光信号探测模块相对设置;入射光准直模块、第一散射光强探测模块、第二散射光强探测模块和偏振光信号探测模块内部分别设置有与主测量腔连通的准直腔、第一探测腔、第二探测腔和偏振探测腔。优点是:通过在测量系统内合理设置准直透镜和聚光透镜的组合,实现有效探测环境颗粒物光学性质的目的,有效提高了大气污染物理化性质的探测水平。(The invention discloses a single particle polarized optical property and optical particle size spectrum measuring system, which comprises a main measuring module, an incident light collimation module, a first scattered light intensity detection module, a second scattered light intensity detection module and a polarized light signal detection module, wherein the main measuring module is used for measuring the polarized optical property and the optical particle size spectrum of a single particle; a spherical main measuring cavity is arranged in the main measuring module; the incident light collimation module and the second scattered light intensity detection module are arranged oppositely; the first scattered light intensity detection module and the polarized light signal detection module are arranged oppositely; the incident light collimation module, the first scattered light intensity detection module, the second scattered light intensity detection module and the polarized light signal detection module are respectively internally provided with a collimation cavity, a first detection cavity, a second detection cavity and a polarized detection cavity which are communicated with the main measurement cavity. The advantages are that: through the combination of reasonably setting the collimating lens and the condensing lens in the measuring system, the purpose of effectively detecting the optical property of the environmental particles is realized, and the detection level of the physicochemical property of the atmospheric pollutants is effectively improved.)
1. A single particle polarized optical property and optical particle size spectrum measuring system is characterized in that: the measurement system comprises a main measurement module, an incident light collimation module, a first scattered light intensity detection module, a second scattered light intensity detection module and a polarized light signal detection module; a spherical main measuring cavity is arranged in the main measuring module; the incident light collimation module and the second scattered light intensity detection module are respectively arranged at two opposite sides of the main measurement cavity; the first scattered light intensity detection module and the polarized light signal detection module are respectively arranged on two opposite sides of the main measurement cavity; the sides of the incident light collimation module and the second scattered light intensity detection module are both vertical to the sides of the first scattered light intensity detection module and the polarized light signal detection module; the incident light collimation module, the first scattered light intensity detection module, the second scattered light intensity detection module and the polarized light signal detection module are respectively internally provided with a collimation cavity, a first detection cavity, a second detection cavity and a polarized detection cavity which are communicated with the main measurement cavity; and a light splitting reflection cavity communicated with the polarization detection cavity is also arranged in the polarization light signal detection module.
2. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 1, wherein: the incident light collimation module is in including setting up first collimating lens, polarizer and the cylindrical mirror in the collimation intracavity, first collimating lens, polarizer and cylindrical mirror are followed incident light collimation module arrives the direction of second scattered light intensity detection module sets up at interval in proper order, just the convex surface orientation of first collimating lens the polarizer.
3. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 2, wherein: one end, far away from the main measurement module, of the incident light collimation module is provided with a diode laser, the diode laser extends into the collimation cavity, and the diode laser and the first collimation lens are separated by a certain distance.
4. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 3, wherein: the first detection cavity penetrates through two opposite ends of the first scattered light intensity detection module; the first scattered light intensity detection module comprises a first biconvex lens arranged in the first detection cavity and a first avalanche photodiode arranged outside the first detection cavity; the first biconvex lens is arranged at one end of the first detection cavity close to the main measurement cavity, and the first avalanche photodiode is over against one end of the first detection cavity far away from the main measurement cavity.
5. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 4, wherein: the second detection cavity penetrates through two opposite ends of the second scattered light intensity detection module; the second scattered light intensity detection module comprises a second biconvex lens arranged in the second detection cavity and a second avalanche photodiode arranged outside the second detection cavity; the second biconvex lens is arranged at one end of the second detection cavity close to the main measurement cavity, and the second avalanche photodiode is over against one end of the second detection cavity far away from the main measurement cavity.
6. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 5, wherein: the polarized light signal detection module comprises a second collimating lens, a polarization beam splitter prism, a third collimating lens, a fourth collimating lens, a third avalanche photodiode and a fourth avalanche photodiode, the second collimating lens, the polarization beam splitter prism and the third collimating lens are sequentially arranged in the polarization detection cavity at intervals along the direction from the first scattered light intensity detection module to the polarized light signal detection module, and the third avalanche photodiode is arranged outside the polarization detection cavity; the light splitting reflection cavity is vertical to the polarization detection cavity, the fourth collimating lens is arranged in the light splitting reflection cavity, and the fourth avalanche photodiode is arranged outside the light splitting reflection cavity; the polarization beam splitting prism is arranged at the position where the polarization detection cavity and the beam splitting reflection cavity are crossed.
7. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 6, wherein: the polarization detection cavity penetrates through two opposite ends of the polarization measurement module, the second collimating lens is arranged at one end, close to the main measurement cavity, of the polarization detection cavity, and convex surfaces of the second collimating lens and the third collimating lens face the polarization splitting prism; the third avalanche photodiode is opposite to one end of the polarization detection cavity far away from the main measurement cavity.
8. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 7, wherein: one end, far away from the polarization detection cavity, of the light splitting reflection cavity penetrates through the polarization measurement module, the convex surface of the fourth collimating lens faces the polarization light splitting prism, and the fourth avalanche photodiode is opposite to one end, far away from the polarization detection cavity, of the light splitting reflection cavity.
9. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 8, wherein: the measurement system further comprises a light dissipation module arranged on the same side of the main measurement module as the incident light collimation module, a light dissipation cavity communicated with the main measurement cavity is arranged inside the light dissipation module, and the light dissipation cavity penetrates through two opposite ends of the light dissipation module.
10. The single particle polarized optical property and optical particle size spectrometry measurement system of claim 9, wherein: a first high-reflection mirror and a second high-reflection mirror are arranged in the main measuring cavity, and the first high-reflection mirror is arranged at a position where the main measuring cavity is communicated with the first measuring cavity and corresponds to the light dissipation cavity; the second high-reflection mirror is arranged at the position where the main measurement cavity is communicated with the polarization detection cavity and corresponds to the collimation cavity; the first high-reflection mirror and the second high-reflection mirror are arranged oppositely.
Technical Field
The invention relates to the technical field of atmospheric environment particle physical and chemical property detection, in particular to a single particle polarization optical property and optical particle size spectrum measuring system.
Background
At present, monitoring on air pollution particles mainly focuses on the aspects of concentration, chemical component properties and the like. The lack of detection equipment for the polarization optical property of the particles depends on import equipment, and the main reason is that the particles in the atmosphere are in a monodisperse disordered distribution state, so that the design of a single particle measurement cavity has fluid design difficulty.
Disclosure of Invention
The invention aims to provide a single particle polarization optical property and optical particle size spectrum measuring system, so as to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a single particle polarization optical property and optical particle size spectrum measuring system comprises a main measuring module, an incident light collimation module, a first scattered light intensity detection module, a second scattered light intensity detection module and a polarized light signal detection module; a spherical main measuring cavity is arranged in the main measuring module; the incident light collimation module and the second scattered light intensity detection module are respectively arranged at two opposite sides of the main measurement cavity; the first scattered light intensity detection module and the polarized light signal detection module are respectively arranged on two opposite sides of the main measurement cavity; the sides of the incident light collimation module and the second scattered light intensity detection module are both vertical to the sides of the first scattered light intensity detection module and the polarized light signal detection module; the incident light collimation module, the first scattered light intensity detection module, the second scattered light intensity detection module and the polarized light signal detection module are respectively internally provided with a collimation cavity, a first detection cavity, a second detection cavity and a polarized detection cavity which are communicated with the main measurement cavity; and a light splitting reflection cavity communicated with the polarization detection cavity is also arranged in the polarization light signal detection module.
Preferably, the incident light collimation module is including setting up first collimating lens, polarizer and the cylindrical mirror in the collimation intracavity, first collimating lens, polarizer and cylindrical mirror are followed the incident light collimation module arrives the direction of second scattered light intensity detection module sets up at interval in proper order, just the convex surface orientation of first collimating lens the polarizer.
Preferably, one end of the incident light collimation module, which is far away from the main measurement module, is provided with a diode laser, the diode laser extends into the collimation cavity, and the diode laser and the first collimation lens are away from each other by a certain distance.
Preferably, the first detection cavity penetrates through two opposite ends of the first scattered light intensity detection module; the first scattered light intensity detection module comprises a first biconvex lens arranged in the first detection cavity and a first avalanche photodiode arranged outside the first detection cavity; the first biconvex lens is arranged at one end of the first detection cavity close to the main measurement cavity, and the first avalanche photodiode is over against one end of the first detection cavity far away from the main measurement cavity.
Preferably, the second detection cavity penetrates through two opposite ends of the second scattered light intensity detection module; the second scattered light intensity detection module comprises a second biconvex lens arranged in the second detection cavity and a second avalanche photodiode arranged outside the second detection cavity; the second biconvex lens is arranged at one end of the second detection cavity close to the main measurement cavity, and the second avalanche photodiode is over against one end of the second detection cavity far away from the main measurement cavity.
Preferably, the polarized light signal detection module includes a second collimating lens, a polarization beam splitter prism, a third collimating lens, a fourth collimating lens, a third avalanche photodiode and a fourth avalanche photodiode, the second collimating lens, the polarization beam splitter prism and the third collimating lens are sequentially disposed in the polarization detection cavity at intervals along a direction from the first scattered light intensity detection module to the polarized light signal detection module, and the third avalanche photodiode is disposed outside the polarization detection cavity; the light splitting reflection cavity is vertical to the polarization detection cavity, the fourth collimating lens is arranged in the light splitting reflection cavity, and the fourth avalanche photodiode is arranged outside the light splitting reflection cavity; the polarization beam splitting prism is arranged at the position where the polarization detection cavity and the beam splitting reflection cavity are crossed.
Preferably, the polarization detection cavity penetrates through two opposite ends of the polarization measurement module, the second collimating lens is disposed at one end of the polarization detection cavity close to the main measurement cavity, and convex surfaces of the second collimating lens and the third collimating lens face the polarization splitting prism; the third avalanche photodiode is opposite to one end of the polarization detection cavity far away from the main measurement cavity.
Preferably, one end of the light splitting reflection cavity, which is far away from the polarization detection cavity, penetrates through the polarization measurement module, a convex surface of the fourth collimating lens faces the polarization light splitting prism, and the fourth avalanche photodiode is right opposite to one end of the light splitting reflection cavity, which is far away from the polarization detection cavity.
Preferably, the measurement system further comprises a light dissipation module arranged at the same side of the main measurement module as the incident light collimation module, a light dissipation cavity communicated with the main measurement cavity is arranged in the light dissipation module, and the light dissipation cavity penetrates through two opposite ends of the light dissipation module.
Preferably, a first high-reflection mirror and a second high-reflection mirror are arranged in the main measurement cavity, and the first high-reflection mirror is arranged at a position where the main measurement cavity is communicated with the first measurement cavity and corresponds to the light dissipation cavity; the second high-reflection mirror is arranged at the position where the main measurement cavity is communicated with the polarization detection cavity and corresponds to the collimation cavity; the first high-reflection mirror and the second high-reflection mirror are arranged oppositely.
The invention has the beneficial effects that: 1. through the combination of reasonably setting the collimating lens and the condensing lens in the measuring system, the purpose of effectively detecting the optical property of the environmental particles is realized, and the detection level of the physicochemical property of the atmospheric pollutants is effectively improved. 2. The spherical main measurement cavity can ensure that the airflow in the measurement cavity is stable, the particles smoothly pass through the measurement points, and the estimation of the optical properties of the particles is more accurate. 3. The measuring system reasonably designs the shape of the main measuring cavity and the positions of all modules through strict fluid mechanics calculation, ensures stable airflow in the cavity through repeated measurement and calculation in a laboratory, and realizes stable particle beam passing through measuring point positions.
Drawings
Fig. 1 is a schematic structural diagram of a measurement system in an embodiment of the present invention.
In the figure: 1. a main measurement module; 11. a primary measurement cavity; 12. (ii) particulate matter; 13. a first high-reflection mirror; 14. a second high-reflection mirror; 2. an incident light collimation module; 21. a collimating cavity; 22. a first collimating lens; 23. a polarizer; 24. a cylindrical mirror; 3. a first scattered light intensity detection module; 31. a first detection chamber; 32. a first biconvex lens; 33. a first avalanche photodiode; 4. a second scattered light intensity detection module; 41. a second detection chamber; 42. a second biconvex lens; 43. a second avalanche photodiode; 5. a polarized light signal detection module; 51. a polarization detection cavity; 52. a second collimating lens; 53. a polarization splitting prism; 54. a third collimating lens; 55. a light splitting reflection cavity; 56. a fourth collimating lens; 57. a third avalanche photodiode; 58. a fourth avalanche photodiode; 6. a light-dissipating module; 7. a diode laser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the present embodiment provides a
In this embodiment, the first scattered light intensity detection module 3 is a forward 0 ° scattered light intensity detection module, and the second scattered light intensity detection module 4 is a forward 90 ° scattered light intensity detection module; the polarized light signal detection module 5 is a backward 180-degree polarized light signal detection module. The incident
In this embodiment, the main measurement device is square, made of aluminum or stainless steel, and a spherical main measurement cavity 11 is provided inside the main measurement device, so as to ensure the stability of a small circulation inside the cavity and the stability of a beam waist of a particle beam. From fig. 1, the upper plane of the measuring module is connected into the transmitted
In this embodiment, the incident
In this embodiment, a diode laser 7 is disposed at one end of the incident
In this embodiment, the incident
In this embodiment, the
In this embodiment, the first avalanche photodiode 33(APD) receives the intensity of the scattered light scattered from the first
In this embodiment, the
In this embodiment, the second avalanche photodiode 43(APD) receives the scattered light intensity scattered from the second
In this embodiment, the polarized light signal detection module 5 includes a
In this embodiment, the
In this embodiment, one end of the light
In this embodiment, the
In this embodiment, the measurement system further includes a light dissipation module 6 disposed on the same side of the main measurement module 1 as the incident
In this embodiment, a first high-
In this embodiment, the light dissipation module 6 can dissipate the redundant laser beam emitted by the diode laser 7, and the redundant laser beam sequentially passes through the second high-
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention provides a single particle polarization optical property and optical particle size spectrum measuring system, which realizes the purpose of effectively detecting the optical property of environmental particles by reasonably arranging the combination of a collimating lens and a condensing lens in the measuring system, and effectively improves the detection level of the physicochemical property of atmospheric pollutants; the spherical main measurement cavity can ensure that the airflow in the measurement cavity is stable, the particles smoothly pass through the measurement points, and the estimation of the optical properties of the particles is more accurate; the measuring system reasonably designs the shape of the main measuring cavity and the positions of all modules through strict fluid mechanics calculation, ensures stable airflow in the cavity through repeated measurement and calculation in a laboratory, and realizes stable particle beam passing through measuring point positions.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
- 上一篇:一种医用注射器针头装配设备
- 下一篇:微生物非直观成像检测装置及方法