Laser radar system for atmospheric ozone detection

Abstract

The utility model discloses a laser radar system for atmospheric ozone detection, and relates to the technical field of atmospheric ozone detection. The device specifically comprises a laser emitting device which is used for emitting a first wavelength laser beam; after the first wavelength laser beam passes through the return light wavelength conversion device, a second wavelength laser beam and a third wavelength laser beam are respectively generated; the laser receiving device receives an echo signal, and the echo signal is obtained by backscattering the first wavelength laser beam, the second wavelength laser beam and the third wavelength laser beam through the atmosphere; and the at least one high-reflectivity mirror is arranged between the laser emitting device and the wavelength conversion device and is used for reflecting the first wavelength laser beam emitted by the laser emitting device and outputting the reflected first wavelength laser beam to the wavelength conversion device. The objective of the utility model is to prevent mirror surface light return focuses of a wavelength conversion device from converging to a laser emission device and guarantee the working stability of the laser emission device.

Description

Technical Field

[0001] The utility model relates to the technical field of atmospheric ozone detection, and particularly relates to a lidar system for atmospheric ozone detection. Background Technique

[0002] As one of the important trace components in the Earth's atmosphere, ozone has significant environmental and health impacts. The distribution altitude range of atmospheric ozone is 0 - 40 kilometers, and its average content is roughly 10 - 100 ppb (volume ratio). In the atmosphere, the distribution of ozone is not uniform, mainly concentrated in the stratosphere at 10 - 30 kilometers, while the ozone content in the troposphere only accounts for about 10% of the total. Ozone appears as a light blue gas with an odor at normal temperature. In the troposphere at 10 - 40 kilometers above the ground, it can absorb most of the ultraviolet bands in the solar spectrum, thus protecting organisms on the Earth from ultraviolet radiation damage.

[0003] However, there are significant differences in the sources and functions of ozone in the troposphere and stratosphere. Ozone in the troposphere mainly comes from natural processes, such as chemical reactions under lightning and solar radiation. Ozone in the stratosphere, especially ozone in the boundary layer, mainly comes from human activities, such as industrial emissions and traffic pollution. When the ozone concentration reaches a certain level, its strong oxidation characteristics will have direct and serious harms to human health, the growth of animals and plants, and the ecological environment. Especially when the ozone concentration is relatively high in the range of 10 - 100 meters above the ground, it will form photochemical smog pollution, seriously affecting air quality and the human living environment.

[0004] In order to effectively monitor the ozone concentration in the atmosphere, a variety of monitoring devices and methods have been developed. Among them, the ozone differential absorption lidar system (DIAL) is a relatively advanced monitoring technology. This system realizes the precise monitoring of ozone concentration through the coordinated operation of a laser emission device, a wavelength conversion device, and a laser receiving device. Specifically, the laser generated by the laser emission device is converted into a laser with a specific wavelength through the wavelength conversion device, and then the laser receiving device receives the atmospheric echo signal reflected back. By analyzing the received atmospheric echo signal, the concentration distribution of ozone in the atmosphere can be calculated.

[0005] However, in the existing ozone differential absorption lidar system, the laser emission device and the wavelength conversion device are arranged facing each other directly, which causes the mirror retroreflection focus of the wavelength conversion device to converge at the laser emission device, thus possibly causing damage to the laser emission device. This design defect not only affects the service life of the device but also may lead to inaccurate monitoring results.

[0006] Therefore, how to avoid the mirror retroreflection focus of the wavelength conversion device from converging at the laser emission device and ensure the stability of the laser emission device during operation has become an urgent technical problem to be solved. Summary of the Invention

[0007] The main object of the present utility model is to provide a lidar system for atmospheric ozone detection, aiming to avoid the focus of the specular retroreflection of the wavelength conversion device from converging at the laser emitting device and ensure the stability of the laser emitting device during operation.

[0008] To achieve the above object, the present utility model provides a lidar system for atmospheric ozone detection, comprising:

[0009] A laser emitting device for emitting a first wavelength laser beam;

[0010] A wavelength conversion device, after passing through which the first wavelength laser beam generates a second wavelength laser beam and a third wavelength laser beam respectively;

[0011] A laser receiving device for receiving an echo signal, which is obtained by the backward scattering of the first wavelength laser beam, the second wavelength laser beam, and the third wavelength laser beam in the atmosphere; and

[0012] At least one high reflector, disposed between the laser emitting device and the wavelength conversion device, for reflecting the first wavelength laser beam emitted by the laser emitting device and outputting the reflected first wavelength laser beam to the wavelength conversion device, so as to avoid the focus of the specular retroreflection of the wavelength conversion device from converging at the laser emitting device.

[0013] In an embodiment of the present application, at least one dichroic mirror is further disposed between the high reflector and the laser emitting device, for filtering the first wavelength laser beam emitted by the laser emitting device and reflecting the filtered first wavelength laser beam to the input end of the high reflector.

[0014] In an embodiment of the present application, the laser emitting device includes:

[0015] A laser, capable of generating a first wavelength laser beam, and the first wavelength is 266 nm.

[0016] In an embodiment of the present application, the wavelength conversion device includes:

[0017] A Raman cell, after passing through which the first wavelength laser beam generates a second wavelength laser beam and a third wavelength laser beam respectively, the second wavelength is 289 nm; the third wavelength is 316 nm.

[0018] In an embodiment of the present application, at least one wide reflector for focusing and reflecting the second laser beam and the third laser beam output by the Raman cell is disposed at the output end of the Raman cell.

[0019] In an embodiment of the present application, the echo signals include: a first echo signal, a second echo signal, and a third echo signal;

[0020] Among them, the first echo signal, the second echo signal, and the third echo signal are respectively obtained by backscattering of a first-wavelength laser beam, a second-wavelength laser beam, and a third-wavelength laser beam through the atmosphere.

[0021] In an embodiment of the present application, the receiving device includes:

[0022] A telescope for receiving echo signals;

[0023] An eyepiece provided at the output end of the telescope;

[0024] A first beam splitter, and a first photomultiplier tube provided on the first light output side of the first beam splitter;

[0025] A second beam splitter provided on the second light output side of the first beam splitter, and a second photomultiplier tube provided on the first light output side of the second beam splitter;

[0026] A third beam splitter provided on the second light output side of the second beam splitter, and a third photomultiplier tube provided on the first light output side of the third beam splitter.

[0027] In an embodiment of the present application, a first filter is provided between the first beam splitter and the first photomultiplier tube; and / or

[0028] A second filter is provided between the second beam splitter and the second photomultiplier tube; and / or

[0029] A third filter is provided between the third beam splitter and the third photomultiplier tube.

[0030] In an embodiment of the present application, a first plano-convex lens is provided between the first filter and the first photomultiplier tube; and / or

[0031] A second plano-convex lens is provided between the second filter and the second photomultiplier tube; and / or

[0032] A third plano-convex lens is provided between the third filter and the third photomultiplier tube.

[0033] In an embodiment of the present application, a diaphragm is further provided between the telescope and the eyepiece.

[0034] By adopting the above technical solutions, the setting of the highly reflective mirror avoids the focusing of the mirror return light spot of the wavelength conversion device on the laser emission device, thereby protecting the laser emission device and prolonging its service life. The laser receiving device can receive echo signals of multiple wavelengths, which helps to improve the accuracy and resolution of detection and imaging. Description of the Drawings

[0035] The present utility model will be described in detail below in conjunction with specific embodiments and the accompanying drawings, where:

[0036] Figure 1 It is a schematic diagram of the overall structure of the laser emission device and the wavelength conversion device of the present utility model;

[0037] Figure 2 It is a schematic diagram of the structure of the laser receiving device of the present utility model;

[0038] 10. Laser; 20. Dichroic mirror; 30. High reflector; 40. Raman tube; 50. Broad reflector; 60. Telescope; 70. Diaphragm; 80. Eyepiece; 91. First beam splitter; 92. Second beam splitter; 93. Third beam splitter; 101. First filter; 102. Second filter; 103. Third filter; 111. First plano-convex lens; 112. Second plano-convex lens; 113. Third plano-convex lens; 121. First photomultiplier tube; 122. Second photomultiplier tube; 123. Third photomultiplier tube. Specific embodiments

[0039] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present utility model and do not constitute a limitation to the present utility model.

[0040] As Figures 1 to 2 shown, in order to achieve the above objectives, the present utility model proposes a lidar system for atmospheric ozone detection, including:

[0041] A laser emission device for emitting a first-wavelength laser beam;

[0042] A wavelength conversion device, after the first-wavelength laser beam passes through the wavelength conversion device, a second-wavelength laser beam and a third-wavelength laser beam are respectively generated;

[0043] A laser receiving device for receiving an echo signal, the echo signal being obtained by backward scattering of the first-wavelength laser beam, the second-wavelength laser beam, and the third-wavelength laser beam through the atmosphere; and

[0044] At least one high reflector 30 is provided between the laser emission device and the wavelength conversion device, and is used for reflecting the first-wavelength laser beam emitted by the laser emission device and outputting the reflected first-wavelength laser beam to the wavelength conversion device, so as to prevent the mirror retroreflection focus of the wavelength conversion device from converging at the laser emission device.

[0045] Specifically, the laser emission device is used to emit a laser beam with a first wavelength. The laser emission device generally consists of a metal housing and a laser diode or a solid-state laser 10 inside. The first-wavelength laser beam emitted by the laser emission device is reflected by a high-reflection mirror 30 and then output to the wavelength conversion device.

[0046] The wavelength conversion device converts the first-wavelength laser beam into second- and third-wavelength laser beams. The wavelength conversion device can be composed of a nonlinear optical crystal and an optical coating lens. The wavelength conversion device receives the first-wavelength laser beam reflected by the high-reflection mirror 30 and converts it into second- and third-wavelength laser beams.

[0047] The laser receiving device receives the echo signals scattered by the first-, second-, and third-wavelength laser beams after passing through the atmosphere. The laser receiving device is located on the receiving path of the system and is responsible for receiving and processing the scattered atmospheric echo signals.

[0048] At least one high-reflection mirror 30 is used to reflect the first-wavelength laser beam emitted by the laser emission device and output the reflected laser beam to the wavelength conversion device. Its main purpose is to prevent the mirror retroreflection focus of the wavelength conversion device from converging at the laser emission device. The high-reflection mirror 30 is made of coated glass or metal with a high reflectivity. The high-reflection mirror 30 is arranged between the laser emission device and the wavelength conversion device to ensure the correct path of the laser beam.

[0049] In this application, the first-wavelength laser beam is a 266-nm laser beam; the second-wavelength laser beam is a 289-nm laser beam; the third-wavelength laser beam is a 316-nm laser beam;

[0050] Adopting the above technical solution, the setting of the high-reflection mirror 30 prevents the mirror retroreflection focus of the wavelength conversion device from converging at the laser emission device, thereby protecting the laser emission device and extending its service life. The laser receiving device can receive echo signals of multiple wavelengths, which helps to improve the accuracy of detection and imaging.

[0051] In an embodiment of this application, at least one dichroic mirror 20 is further arranged between the high-reflection mirror 30 and the laser emission device, which is used to filter the first-wavelength laser beam emitted by the laser emission device and reflect the filtered first-wavelength laser beam to the input end of the high-reflection mirror 30.

[0052] Specifically, the laser emission device is responsible for emitting the first-wavelength laser beam. The dichroic mirror 20 is located between the laser emission device and the high-reflection mirror 30. The dichroic mirror 20 is used to filter the laser beam of a specific wavelength. The high-reflection mirror 30 is located behind the dichroic mirror 20 and is used to reflect the laser beam filtered by the dichroic mirror 20.

[0053] The laser emission device emits a laser beam with a first wavelength. The laser beam passes through the dichroic mirror 20, and the dichroic mirror 20 filters the laser beam and reflects the laser beam with a specific wavelength. The first-wavelength laser beam filtered by the dichroic mirror 20 is reflected to the input end of the highly reflective mirror 30. The highly reflective mirror 30 highly efficiently reflects the laser beam received at the input end.

[0054] With the above technical solution, through the filtering of the dichroic mirror 20, it is ensured that only the laser beam with a specific wavelength enters the highly reflective mirror 30, improving the accuracy and stability of the system. The highly efficient reflection performance of the highly reflective mirror 30 minimizes the loss of laser energy and improves the overall efficiency of the system. The dichroic mirror 20 can adjust the filtering wavelength as needed, enabling the system to adapt to different application requirements.

[0055] In an embodiment of the present application, the laser emission device includes:

[0056] A laser 10 that can generate a laser beam with a first wavelength, and the first wavelength is 266 nm.

[0057] With the above technical solution, ozone (O3) has a very high absorption coefficient in the ultraviolet band (especially at 266 nm). Using a laser 10 with a wavelength of 266 nm can significantly improve the detection sensitivity and accuracy of ozone because ozone absorbs the laser at this wavelength very strongly. The laser 10 with a wavelength of 266 nm can effectively distinguish ozone from other atmospheric components. Due to the obvious absorption characteristics of ozone at this wavelength, it can reduce the interference of other gases on the detection results and improve the specificity and reliability of the measurement.

[0058] In an embodiment of the present application, the wavelength conversion device includes:

[0059] A Raman tube 40. After the first-wavelength laser beam passes through the Raman tube 40, a second-wavelength laser beam and a third-wavelength laser beam are respectively generated. The second wavelength is 289 nm; the third wavelength is 316 nm.

[0060] With the above technical solution, using multiple wavelengths (such as 289 nm and 316 nm) can perform differential absorption spectroscopy measurement (DIAL). By comparing the absorption differences at different wavelengths, the concentration of ozone can be accurately calculated. The differential absorption measurement method can significantly improve the accuracy of ozone concentration measurement. The laser beam with a wavelength of 289 nm is near the ozone absorption peak, while the laser beam with a wavelength of 316 nm is in the region where ozone absorption is weak. By comparing the absorption characteristics of these two wavelengths, the interference of other gases and aerosols can be eliminated and the measurement accuracy can be improved.

[0061] In an embodiment of the present application, at least one broad reflective mirror 50 for focusing and reflecting the second laser beam and the third laser beam output by the Raman tube 40 is provided at the output end of the Raman tube 40.

[0062] Specifically, the laser 10 generates a laser beam with a first wavelength (266 nm) and inputs it into the Raman tube 40. The Raman tube 40 receives the 266-nm laser beam from the laser 10 and converts it into laser beams with a second wavelength (289 nm) and a third wavelength (316 nm) through the Raman scattering effect. The output end of the Raman tube 40 is connected to the wide reflector 50.

[0063] The wide reflector 50 is arranged at the output end of the Raman tube 40 and is used to focus and reflect the laser beams with the second wavelength (289 nm) and the third wavelength (316 nm) output by the Raman tube 40. The wide reflector 50 guides the focused laser beams to the area to be detected. The laser beams after being focused and reflected by the wide reflector 50 are received for analyzing and measuring the ozone concentration in the atmosphere.

[0064] The laser 10 emits a laser beam with a first wavelength of 266 nm and inputs it into the Raman tube 40. The 266-nm laser beam generates laser beams with a second wavelength (289 nm) and a third wavelength (316 nm) in the Raman tube 40 through the Raman scattering effect. The 289-nm and 316-nm laser beams output by the Raman tube 40 enter the wide reflector 50. The wide reflector 50 focuses and reflects these two laser beams and guides them to the target area or the detector. The laser beams after being focused and reflected irradiate the ozone molecules in the atmosphere to generate echo signals. The detector receives the echo signals and calculates the ozone concentration through the differential absorption spectroscopy measurement method (DIAL).

[0065] With the above technical solution, differential absorption measurement is carried out using laser beams with wavelengths of 289 nm and 316 nm, which improves the accuracy of ozone concentration measurement. The combination of the Raman tube 40 and the wide reflector 50 reduces the number of lasers 10 required in the system, simplifies the system design, and reduces the cost and complexity. The wide reflector 50 focuses and reflects the laser beams, improves the intensity and quality of the echo signals, and enhances the signal-to-noise ratio.

[0066] In an embodiment of the present application, the echo signal includes: a first echo signal, a second echo signal, and a third echo signal;

[0067] Among them, the first echo signal, the second echo signal, and the third echo signal are respectively obtained by the backward scattering of the laser beam with the first wavelength, the laser beam with the second wavelength, and the laser beam with the third wavelength through the atmosphere.

[0068] With the above technical solution, differential absorption spectroscopy measurement can be carried out by comparing the echo signals of different wavelengths. The accuracy and reliability of ozone concentration measurement are improved.

[0069] In an embodiment of the present application, the receiving device includes:

[0070] A telescope 60 for receiving echo signals;

[0071] An eyepiece 80 provided at the output end of the telescope 60;

[0072] A first beam splitter 91, with a first photomultiplier tube 121 provided on the first light output side of the first beam splitter 91;

[0073] A second beam splitter 92 provided on the second light output side of the first beam splitter 91, with a second photomultiplier tube 122 provided on the first light output side of the second beam splitter 92;

[0074] A third beam splitter 93 provided on the second light output side of the second beam splitter 92, with a third photomultiplier tube 123 provided on the first light output side of the third beam splitter 93.

[0075] Specifically, the telescope 60 is used to receive echo signals reflected from the atmosphere and focus them onto the eyepiece 80. The eyepiece 80 is arranged at the output end of the telescope 60 and is used to further focus and transmit the echo signals. The first beam splitter 91 is arranged behind the eyepiece 80 and is used to split the received echo signals into two light beams, which are respectively transmitted to the first photomultiplier tube 121 and the second beam splitter 92.

[0076] The second beam splitter 92 is arranged on the second light output side of the first beam splitter 91 and is used to split the transmitted light beam into two light beams again, which are respectively transmitted to the second photomultiplier tube 122 and the third beam splitter 93.

[0077] The third beam splitter 93 is arranged on the second light output side of the second beam splitter 92 and is used to split the transmitted light beam into two light beams, one of which is transmitted to the third photomultiplier tube 123.

[0078] The first photomultiplier tube 121 is arranged on the first light output side of the first beam splitter 91 and is used to receive and amplify the echo signals of the first light beam. The second photomultiplier tube 122 is arranged on the first light output side of the second beam splitter 92 and is used to receive and amplify the echo signals of the second light beam. The third photomultiplier tube 123 is arranged on the first light output side of the third beam splitter 93 and is used to receive and amplify the echo signals of the third light beam.

[0079] The telescope 60 is located at the very front end of the system and receives the echo signals in the atmosphere. The eyepiece 80 is connected to the output end of the telescope 60 and is used to further focus the echo signals. The first beam splitter 91 is arranged behind the eyepiece 80 and divides the echo signals into two light beams, one of which is transmitted to the first photomultiplier tube 121 and the other is transmitted to the second beam splitter 92. The second beam splitter 92 is arranged on the second light output side of the first beam splitter 91 and divides the transmitted light beam into two light beams again, one of which is transmitted to the second photomultiplier tube 122 and the other is transmitted to the third beam splitter 93. The third beam splitter 93 is arranged on the second light output side of the second beam splitter 92 and divides the transmitted light beam into two light beams, one of which is transmitted to the third photomultiplier tube 123. The first photomultiplier tube 121 is arranged on the first light output side of the first beam splitter 91, the second photomultiplier tube 122 is arranged on the first light output side of the second beam splitter 92, and the third photomultiplier tube 123 is arranged on the first light output side of the third beam splitter 93.

[0080] Among them, the first beam splitter 91 filters out the light with a wavelength of 266 nm, the second beam splitter 92 filters out the light with a wavelength of 289 nm; the third beam splitter 93 filters out the light with a wavelength of 316 nm.

[0081] Adopting the above technical solution, the echo signals are divided into multiple light beams by the beam splitter, and the echo signals with different wavelengths can be detected simultaneously, improving the detection ability and efficiency of the system. The photomultiplier tube can amplify the received optical signal, improve the signal intensity and signal-to-noise ratio, and thus obtain more reliable data. The use of multiple photomultiplier tubes can detect the echo signals of multiple wavelengths simultaneously. Combining with the differential absorption spectroscopy measurement method (DIAL), the accuracy and reliability of ozone concentration measurement are improved.

[0082] In an embodiment of the present application, a first filter 101 is arranged between the first beam splitter 91 and the first photomultiplier tube 121; and / or

[0083] A second filter 102 is arranged between the second beam splitter 92 and the second photomultiplier tube 122; and / or

[0084] A third filter 103 is arranged between the third beam splitter 93 and the third photomultiplier tube 123.

[0085] Adopting the above technical solution, the filter can selectively pass the optical signal of a specific wavelength and block other unnecessary wavelengths, thereby improving the specificity of the echo signal. This helps to reduce the interference of other gases and stray light on the measurement result and improve the measurement accuracy.

[0086] In an embodiment of the present application, a first plano-convex lens 121 is arranged between the first filter 101 and the first photomultiplier tube 121; and / or

[0087] A second plano-convex lens 122 is provided between the second filter 102 and the second photomultiplier tube 122; and / or

[0088] A third plano-convex lens 123 is provided between the third filter 103 and the third photomultiplier tube 123.

[0089] Adopting the above technical solution, the plano-convex lens can effectively reduce the aberration and distortion in the optical system, ensure that the optical signal transmitted to the photomultiplier tube maintains good quality and shape, and improve the measurement accuracy.

[0090] In an embodiment of the present application, a diaphragm 70 is further provided between the telescope 60 and the eyepiece 80.

[0091] Adopting the above technical solution, by adjusting the aperture of the diaphragm 70, the beam diameter entering the eyepiece 80 can be precisely controlled, making the beam more concentrated and uniform, and improving the imaging quality and detection efficiency of the optical system.

[0092] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A lidar system for atmospheric ozone detection, characterized in that, Comprising: A laser emission device for emitting a first-wavelength laser beam; A wavelength conversion device, after the first-wavelength laser beam passes through the wavelength conversion device, respectively generating a second-wavelength laser beam and a third-wavelength laser beam; A laser reception device for receiving an echo signal, the echo signal being obtained by the backward scattering of the first-wavelength laser beam, the second-wavelength laser beam, and the third-wavelength laser beam through the atmosphere; and At least one high-reflection mirror disposed between the laser emission device and the wavelength conversion device, for reflecting the first-wavelength laser beam emitted by the laser emission device and outputting the reflected first-wavelength laser beam to the wavelength conversion device, so as to prevent the mirror retroreflection focus of the wavelength conversion device from converging at the laser emission device.

2. The lidar system for atmospheric ozone detection according to claim 1, wherein At least one dichroic mirror is further disposed between the high-reflection mirror and the laser emission device, for filtering the first-wavelength laser beam emitted by the laser emission device and reflecting the filtered first-wavelength laser beam to the input end of the high-reflection mirror.

3. The lidar system for atmospheric ozone detection according to claim 1, characterized in that, The laser emission device includes: A laser, capable of generating a first-wavelength laser beam, the first wavelength being 266 nm.

4. The lidar system for atmospheric ozone detection according to claim 1, wherein, The wavelength conversion device includes: A Raman tube, after the first-wavelength laser beam passes through the Raman tube, respectively generating a second-wavelength laser beam and a third-wavelength laser beam, the second wavelength being 289 nm; the third wavelength being 316 nm.

5. The lidar system for atmospheric ozone detection according to claim 4, characterized in that, At least one wide-reflection mirror for focusing and reflecting the second laser beam and the third laser beam output by the Raman tube is disposed at the output end of the Raman tube.

6. The lidar system for atmospheric ozone detection according to claim 1, wherein The echo signal includes: a first echo signal, a second echo signal, and a third echo signal; Wherein, the first echo signal, the second echo signal, and the third echo signal are respectively obtained by the backward scattering of the first-wavelength laser beam, the second-wavelength laser beam, and the third-wavelength laser beam through the atmosphere.

7. The lidar system for atmospheric ozone detection according to claim 1, characterized in that, The reception device includes: A telescope for receiving the echo signal; An eyepiece disposed at the output end of the telescope; A first beam splitter, a first photomultiplier tube being disposed on the first light output side of the first beam splitter; A second beam splitter disposed on the second light output side of the first beam splitter, a second photomultiplier tube being disposed on the first light output side of the second beam splitter; A third beam splitter disposed on the second light output side of the second beam splitter, a third photomultiplier tube being disposed on the first light output side of the third beam splitter.

8. The lidar system for atmospheric ozone detection according to claim 7, wherein, A first filter is disposed between the first beam splitter and the first photomultiplier tube; and / or A second filter is disposed between the second beam splitter and the second photomultiplier tube; and / or A third filter is disposed between the third beam splitter and the third photomultiplier tube.

9. The lidar system for atmospheric ozone detection according to claim 8, characterized in that, A first plano-convex lens is disposed between the first filter and the first photomultiplier tube; and / or A second plano-convex lens is disposed between the second filter and the second photomultiplier tube; and / or A third plano-convex lens is disposed between the third filter and the third photomultiplier tube.

10. The lidar system for atmospheric ozone detection according to claim 7, characterized in that, A diaphragm is further disposed between the telescope and the eyepiece.

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