Device for monitoring aerosol pollution in laboratory
By designing a device that utilizes the principle of double-slit interference and light screen detection, the problem of laboratory aerosol pollution monitoring is solved, real-time monitoring of laboratory aerosol pollution is achieved, and the accuracy of laboratory results is improved.
Patent Information
- Application Number
- CN202421753303.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-23
AI Technical Summary
Aerosol contamination is prone to occur in the laboratory, resulting in contamination of reagents, instruments and ventilation systems, resulting in false positive results and incorrect judgments.
Design a device, including a light source, double-slit plate, transparent container and air pump, uses the double-slit interference principle and light screen to detect the refractive index consistency between the current gas and clean gas in the laboratory, and monitor aerosol pollution in real time.
Real-time monitoring of laboratory aerosol pollution is achieved, and aerosol pollution can be quickly judged and false positive results and wrong judgments can be avoided.
Smart Images
Figure CN223051121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aerosol pollution monitoring, in particular to a device for monitoring aerosol pollution in a laboratory. Background Art
[0002] Aerosol pollution is likely to occur in a laboratory. For example, in a PCR laboratory, during the sample preparation process and the PCR amplification process, aerosols are easily generated, resulting in aerosol pollution in the laboratory. During the sample preparation process, aerosols can be formed by the friction between the sample liquid surface and the air. When operating, violently shaking the reaction tube, opening the lid, aspirating the sample, and repeated aspiration of the pipette may all form aerosols and cause pollution. During the PCR amplification process, the accumulation of amplification products in the laboratory can be caused. Usually, a typical PCR amplification can produce 10 9 copies of the target sequence. If aerosolized, even the smallest aerosol will contain 10 6 copies of the amplification product. These aerosols will contaminate the reagents, instrument equipment, and ventilation system in the laboratory, causing serious laboratory pollution, resulting in false positive results for test samples, and making incorrect judgments and decisions in the experiment.
[0003] Therefore, corresponding equipment is needed to monitor aerosol pollution in the laboratory. Summary of the Utility Model
[0004] Based on this, the purpose of the utility model is to provide a device for monitoring aerosol pollution in a laboratory, which can be used to monitor in real time whether the current gas in the laboratory is aerosol-polluted.
[0005] A device for monitoring aerosol pollution in a laboratory includes: a light source, a double-slit plate, a first transparent container, a second transparent container, and a light screen. The light source is used to generate a light beam. The double-slit plate is provided with double slits. The first transparent container and the second transparent container are respectively arranged beside the double slits in one-to-one correspondence. The first transparent container is hermetically filled with clean laboratory gas. The second transparent container is respectively provided with an air inlet and an air outlet. The air inlet is connected to an air pump, and the air pump is used to input the current laboratory gas into the second transparent container. The light beam passes through the double slits, is refracted by the clean laboratory gas in the first transparent container and the current laboratory gas in the second transparent container, and falls on the light screen.
[0006] The device for monitoring laboratory aerosol pollution described in the present utility model utilizes the double-slit interference principle to determine whether laboratory aerosol pollution has occurred. For the device for monitoring laboratory aerosol pollution described in the present utility model, the first transparent container is arranged beside one of the two slits, and the first transparent container is hermetically filled with clean laboratory gas; the second transparent container is arranged beside the other slit, and the current laboratory gas can be made to flow into the second transparent container in real time through the air pump and discharged from the exhaust port, so that the second transparent container is filled with the current laboratory gas in real time. The light beam generated by the light source passes through the double slits of the double-slit plate to form double-slit interference, and is refracted by the clean laboratory gas in the first transparent container and the current laboratory gas in the second transparent container respectively, and then falls on the light screen. If the clean laboratory gas in the first transparent container is the same as the current laboratory gas in the second transparent container, the refractive indices are the same, and the fringes falling on the light screen are bright fringes; if the clean laboratory gas in the first transparent container is different from the current laboratory gas in the second transparent container, the refractive indices are different, there is an optical path difference, and the fringes falling on the light screen may appear as dark fringes, thus indicating that laboratory aerosol pollution has occurred.
[0007] Further, the device for monitoring laboratory aerosol contamination further includes a housing, an intake pipe, and an exhaust pipe; the housing is in a semi-enclosed square structure, the light screen is hermetically arranged on the housing and forms a cubic structure with the housing, and a sealed cavity is formed inside the enclosure of the light screen and the housing; the double-slit plate is fixedly arranged inside the housing and is spaced and parallel to the light screen; the double-slit plate divides the sealed cavity into a first cavity and a second cavity, wherein the cavity where the light screen is located is the second cavity; the light source is arranged in the first cavity and is spaced from the double-slit plate, and is arranged on the center line between the two slits of the double-slit of the double-slit plate; the first transparent container and the second transparent container are arranged in the second cavity, wherein the first transparent container is arranged beside one of the slits of the double-slit, and the second transparent container is arranged beside the other slit of the double-slit; the air pump is arranged outside the housing; one end of the intake pipe is communicated with the air inlet, and the other end passes through the housing and is communicated with the air pump; one end of the exhaust pipe is communicated with the air outlet, and the other end passes through the housing. By hermetically arranging the light screen on the housing and forming a cubic structure with the housing, so that the light screen can be used as part of the "outer shell", and the stripe situation falling on the light screen can be observed from the outside; by arranging the light source on the center line between the two slits of the double-slit of the double-slit plate, so that the light beam can generate double-slit diffraction through the double-slit; by arranging the first transparent container beside one of the slits of the double-slit and the second transparent container beside the other slit of the double-slit, so that after the light beam passes through the double-slit, it can be refracted by the clean laboratory gas in the first transparent container and the current laboratory gas in the second transparent container and fall on the light screen. By arranging the intake pipe to communicate the second transparent container inside the housing with the air pump outside the housing, the air pump can input the current laboratory gas into the second transparent container; and one end of the exhaust pipe is communicated with the air outlet and the other end passes through the housing, so that the current laboratory gas input into the second transparent container can be discharged, facilitating the real-time circulation of the current laboratory gas in the second transparent container. Through the arrangement of structures such as the housing in this application, the device for monitoring laboratory aerosol contamination described in the present utility model is easy to carry, has a simple structure, and can detect in real time whether the current laboratory gas is contaminated by aerosol.
[0008] Further, the sealed cavity is in a vacuum environment. That is, the first cavity and the second cavity are in a vacuum environment to reduce optical interference.
[0009] Further, the clean laboratory gas hermetically contained in the first transparent container is preset clean air, and the number of air particles is less than 100 per m 3(Particle size ≤ 0.5um). Compared with the clean gas in the laboratory and the aerosol - polluted laboratory gas, there are differences in the number of particles, particle size, etc., which will affect the refractive index. Therefore, the gas set as above can be selected as the clean gas in the laboratory. Of course, those skilled in the art can also make routine adjustments according to needs.
[0010] Further, the device for monitoring laboratory aerosol pollution further includes a photoresistor, a light bulb, and a circuit power supply; the photoresistor is set at the center of the light screen and on the center line between the two slits of the double - slit plate; the photoresistor, the light bulb, and the circuit power supply are connected in series to form a circuit. After the light beam of the light source passes through the double - slit, if the clean gas in the laboratory in the first transparent container is the same as the current gas in the laboratory in the second transparent container, the refractive indices are the same, and a bright fringe is formed at the center of the light screen, that is, at the position of the photoresistor. If the clean gas in the laboratory in the first transparent container and the current gas in the laboratory in the second transparent container are not the same, the refractive indices are different, there is an optical path difference, and a dark fringe may appear at the center of the light screen, that is, at the position of the photoresistor; by changing the resistance value according to the light intensity irradiated on the photoresistor position, changing the current size of the circuit, and thus judging whether laboratory aerosol pollution occurs through the brightness and darkness of the light bulb.
[0011] Further, the photoresistor is a photoresistor with the stronger the light irradiation, the larger the resistance value. Based on the internal photoelectric effect, the stronger the light irradiation on the photoresistor, the larger its resistance value. After the light beam of the light source passes through the double - slit, if the clean gas in the laboratory in the first transparent container is the same as the current gas in the laboratory in the second transparent container, the refractive indices are the same, and a bright fringe is formed at the center of the light screen, that is, at the position of the photoresistor. Since the light intensity irradiated on the photoresistor increases, the resistance value of the photoresistor becomes larger, reducing the circuit current and making the light bulb not light up. If the clean gas in the laboratory in the first transparent container and the current gas in the laboratory in the second transparent container are not the same, the refractive indices are different, there is an optical path difference, and a dark fringe may appear at the center of the light screen, that is, at the position of the photoresistor. Since the light intensity irradiated on the photoresistor decreases or even has no light, the resistance value of the photoresistor becomes smaller, increasing the circuit current and making the light bulb light up, thus indicating that laboratory aerosol pollution has occurred.
[0012] Further, the light bulb is arranged outside the cubic structure formed by the housing and the light screen. So that it is possible to judge whether laboratory aerosol pollution occurs by monitoring the state of the light bulb from the outside.
[0013] Further, the light source is a laser, which is arranged in the first cavity and on the side wall of the housing opposite to the double-slit plate; wherein, the laser is provided with a switch, and the switch is arranged outside the side wall. This is to facilitate turning on the laser to generate a light beam outside. Preferably, the laser is an 800w laser.
[0014] Further, the device for monitoring laboratory aerosol pollution further includes a gas flow rate controller for controlling the gas flow rate of the current laboratory gas input into the second transparent container. By setting the gas flow rate controller to control the gas flow rate of the current laboratory gas input into the second transparent container, the flow of the current laboratory gas in the second transparent container is made laminar flow, reducing the interference factors of the flow rate and ensuring the detection stability.
[0015] Further, the device for monitoring laboratory aerosol pollution further includes an optical element with adjustable refractive index, and the optical element is arranged at the first transparent container. The present utility model further considers that the refractive index of the clean laboratory gas in the first transparent container may change due to certain factors (such as poor sealing or the first transparent container being unable to seal the clean laboratory gas). By adding an optical element with adjustable refractive index, the refractive index can be corrected so that the adjusted refractive index is consistent with the refractive index of the clean laboratory gas sealed in the first transparent container.
[0016] Compared with the prior art:
[0017] The device for monitoring laboratory aerosol pollution of the present utility model has a simple structure, a small overall volume, is easy to carry, and can be used for real-time monitoring of the aerosol pollution of the current laboratory gas.
[0018] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings
[0019] Figure 1 It is a schematic structural diagram of a device for monitoring laboratory aerosol pollution of the present utility model. Detailed Embodiment
[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0021] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of distinguishing the description of the same technical features, and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.
[0022] Similarly, the term "connected" is also used in the specification and claims and should not be construed as being limited to a direct connection. Therefore, the expression "device A is connected to device B" should not be limited to device A being directly connected to device B in the device or system, but means that there is a path between device A and device B, which can be a path including other devices or tools.
[0023] Example 1
[0024] This embodiment provides a device for monitoring laboratory aerosol contamination. Please refer to Figure 1 , which includes: a light source 1, a double-slit plate 2, a first transparent container 3, a second transparent container 4, an air pump 5, and a light screen 6. The light source 1 is used to generate a light beam; the double-slit plate 2 is provided with double slits 21; the first transparent container 3 and the second transparent container 4 are respectively arranged beside the double slits 21 in one-to-one correspondence; the first transparent container 3 is hermetically filled with clean laboratory gas; the second transparent container 3 is respectively provided with an air inlet and an air outlet, and the air inlet is connected to an air pump 5, and the air pump 5 is used to input the current laboratory gas into the second transparent container 4; the light beam generated by the light source 1 passes through the double slits 21, is refracted by the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4, and falls on the light screen.
[0025] The device for monitoring laboratory aerosol contamination in this embodiment utilizes the double-slit interference principle to determine whether laboratory aerosol contamination has occurred. The device for monitoring laboratory aerosol contamination in this embodiment utilizes the light beam generated by the light source 1 to form double-slit interference through the double slits 21 of the double-slit plate 2, and is respectively refracted by the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4, and falls on the light screen 6. If the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4 are the same, the refractive indices are the same, and the stripe falling on the center of the light screen 6 is a bright stripe; if the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4 are different, the refractive indices are different, there is an optical path difference, and the stripe falling on the center of the light screen 6 may appear as a dark stripe, thus indicating that laboratory aerosol contamination has occurred.
[0026] In this embodiment, a first transparent container 3 is provided beside one of the two slits 21, and a laboratory clean gas is sealed in the first transparent container; the laboratory clean gas is preset clean air with the number of air particles less than 100 per m 3 (particle size ≤ 0.5um). A second transparent container 4 is provided beside the other slit of the double slit 21, and the current laboratory gas can be circulated to the second transparent container 4 in real time through an air pump 6 and discharged from the exhaust port, so that the current laboratory gas is circulated in the second transparent container 4 in real time, facilitating the real-time monitoring of whether the current laboratory gas is contaminated by aerosol by the device for monitoring laboratory aerosol contamination in this embodiment.
[0027] The device for monitoring laboratory aerosol contamination in this embodiment further includes a housing 7, an intake pipe 8, and an exhaust pipe 9. Specifically:
[0028] The housing 7 has a semi-surrounding square structure, and the light screen 6 is hermetically arranged on the housing 7 and forms a cubic structure with the housing 7, so that the light screen 6, as part of the "outer shell", can observe the fringe situation falling on the light screen 6 from the outside, facilitating monitoring.
[0029] A sealed cavity is formed inside the enclosure of the light screen 6 and the housing 7. The double-slit plate 2 is fixedly arranged inside the housing 7 and is arranged at an interval and parallel to the light screen 6; the double-slit plate 2 divides the sealed cavity into a first cavity 71 and a second cavity 72, and the cavity where the light screen 6 is located is the second cavity 72. In this embodiment, the sealed cavity is in a vacuum environment, that is, the first cavity 71 and the second cavity 72 are in a vacuum environment to reduce optical interference. The whole device adopts a seamless steel structure to ensure that the sealed cavity inside the device is in a vacuum environment.
[0030] The light source 1 is arranged in the first cavity 7 at an interval from the double-slit plate 2 and is arranged on the center line between the two slits 21 of the double-slit plate 2; in the embodiment, the light source 1 is a laser, specifically an 800W laser. The light source 1 is arranged in the first cavity 71 and on the side wall of the housing opposite to the double-slit plate 2; among them, the laser is provided with a switch, and the switch is arranged outside the side wall to facilitate turning on the laser to generate a beam outside.
[0031] The first transparent container 3 and the second transparent container 4 are arranged in the second cavity 72. Among them, the first transparent container 3 is arranged beside one of the slits of the double slit 21, and the second transparent container 4 is arranged beside the other slit of the double slit 21. So that after the light beam generated by the light source 1 passes through the double slit 21, it can be refracted by the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4 and fall on the light screen. The air pump 5 is arranged outside the housing 7; one end of the intake pipe 8 is communicated with the air inlet of the second transparent container 4, and the other end passes through the housing 7 and is communicated with the air pump 5; one end of the exhaust pipe 9 is communicated with the air outlet of the second transparent container 4, and the other end passes through the housing 7 and is communicated with the outside. The current laboratory gas can be input into the second transparent container 7 through the air pump 5 and the intake pipe 8, and can be discharged through the exhaust pipe 9, so that the current laboratory gas can flow in real time in the second transparent container 4.
[0032] As a more preferred improvement scheme of this embodiment, the device for monitoring laboratory aerosol pollution in this embodiment further includes a photoresistor 10, a light bulb 11, and a circuit power supply 12; the photoresistor 11 is arranged at the center of the light screen 6 and on the center line between the two slits of the double slit 21 of the double slit plate 2; the photoresistor 10, the light bulb 11, and the circuit power supply 12 are connected in series to form a circuit. In this embodiment, the photoresistor is a photoresistor with the stronger the light, the larger the resistance value. Specifically, the photoresistor in this embodiment is a special resistor made of HuaSai cadmium sulfide semiconductor material. Its working principle is based on the internal photoelectric effect. The stronger the light, the larger the resistance value. The dark resistance value can be as small as less than 1 kΩ. When there is light, it is in a high-resistance state, and the bright resistance value can reach 1.5 MΩ. After the light beam of the light source 1 passes through the double slit 21, if the clean laboratory gas in the first transparent container 3 is the same as the current laboratory gas in the second transparent container 4, the refractive indices are the same, and a bright fringe is formed at the position of the photoresistor 10 in the center of the light screen 6. Since the light intensity irradiating on the photoresistor 10 increases, the resistance value of the photoresistor 10 becomes larger, reducing the circuit current, and the light bulb 11 lights up. If the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4 are not the same, the refractive indices are not the same, there is an optical path difference, and a dark fringe may appear at the position of the photoresistor 10 in the center of the light screen 6. Since the light intensity irradiating on the photoresistor 10 decreases or even there is no light, the resistance value of the photoresistor 10 becomes smaller, increasing the circuit current, and the light bulb 11 lights up, thereby indicating that laboratory aerosol pollution has occurred. In this embodiment, the light bulb 11 is arranged outside the cubic structure formed by the housing 7 and the light screen 8, so that it is convenient to judge whether laboratory aerosol pollution has occurred by monitoring the state of the light bulb from the outside.
[0033] The device for monitoring laboratory aerosol contamination in this embodiment further includes a gas flow rate controller 13, which is used to control the gas flow rate of the current laboratory gas input into the second transparent container 4. The gas flow rate controller 13 is arranged on the intake pipe 8 and is located outside the housing 7. By setting the gas flow rate controller 13, the gas flow rate of the current laboratory gas input into the second transparent container 4 is controlled, so that the current laboratory gas flows in a laminar flow within the second transparent container 4, reducing the interference factors of the flow rate and ensuring the detection stability. In the embodiment of the present utility model, the gas flow rate controller 13 is a digital mass flow controller (low range) of the model ACU10FD produced by Beijing Jingliang Technology Co., Ltd.
[0034] In other embodiments of the present utility model, the device for monitoring laboratory aerosol contamination may further include an optical element with adjustable refractive index (not shown in the figure), and the optical element with adjustable refractive index is arranged at the first transparent container 3. The present utility model further considers that the refractive index of the clean laboratory gas in the first transparent container 3 changes due to certain factors (such as: poor sealing, or the first transparent container cannot seal the clean laboratory gas). By adding an optical element with adjustable refractive index, the refractive index can be corrected so that the adjusted refractive index is consistent with the refractive index of the clean laboratory gas sealed in the first transparent container 3. In addition, by adjusting the refractive index through the optical element with adjustable refractive index, it is also possible not to collect the clean laboratory gas.
[0035] The specific working process of the device for monitoring laboratory aerosol contamination in the embodiment of the present utility model is as follows:
[0036] Turn on the air pump 5 to allow the current laboratory gas to be continuously introduced into the second transparent container 4 in real time;
[0037] Turn on the light source 1 to make the light beam (laser) generated by the light source 1 pass through the double slit 21 and be refracted by the clean laboratory gas in the first transparent container 3 and the current laboratory gas in the second transparent container 4 respectively, and then fall on the light screen.
[0038] If the clean laboratory gas in the first transparent container 3 is the same as the current laboratory gas in the second transparent container 4, the refractive indices are the same, there is a bright fringe at the center of the light screen 6, that is, at the position of the photoresistor 10. The light intensity irradiating on the photoresistor 10 increases, the resistance value of the photoresistor 10 becomes larger, the circuit current decreases, and the electric light bulb 11 goes out.
[0039] If there is aerosol pollution in the laboratory gas, and the clean laboratory gas in the first transparent container 3 is inconsistent with the current laboratory gas in the second transparent container 4, then the refractive indices are inconsistent, there is an optical path difference, and dark fringes may appear at the center of the light screen 6, that is, at the photosensitive resistor 10. When the center of the light screen 6, that is, at the photosensitive resistor 10, is a dark fringe, it is a lightless environment, the resistance value of the photosensitive resistor 10 becomes smaller, the circuit current increases, and the light bulb 11 lights up, thus indicating that there is aerosol pollution in the laboratory.
[0040] Compared with the prior art, the device for monitoring laboratory aerosol pollution of the present utility model has a simple structure, a small overall volume, is easy to carry, and can be used for real-time monitoring of the current laboratory gas aerosol pollution.
[0041] The above-described embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and improvements.
Claims
1. A device for monitoring laboratory aerosol contamination, characterized in that: include: A light source, a double-slit plate, a first transparent container, a second transparent container, an air pump, and a light screen; the light source is used to generate a light beam; the double-slit plate is provided with a double slit; the first transparent container and the second transparent container are respectively arranged one by one beside the double slit; the first transparent container is sealed with clean laboratory gas; the second transparent container is respectively provided with an air inlet and an air outlet, the air inlet is connected to the air pump, and the air pump is used to input the current laboratory gas into the second transparent container; the light beam passes through the double slit, is refracted by the clean laboratory gas in the first transparent container and the current laboratory gas in the second transparent container, and falls on the light screen.
2. The device for monitoring laboratory aerosol contamination according to claim 1, characterized in that: It also includes a shell, an air inlet pipe, and an air outlet pipe; the shell is a semi-enclosed square structure, the light screen is sealed and arranged on the shell and forms a square structure with the shell, and the light screen and the shell enclose an interior to form a sealed cavity; the double-slit plate is fixedly arranged in the shell, and is spaced and parallel to the light screen; the double-slit plate divides the sealed cavity into a first cavity and a second cavity, wherein the cavity where the light screen is located is the second cavity; the light source is arranged in the first cavity and is spaced from the double-slit plate, and is arranged on the center line between the two slits of the double slit of the double-slit plate; the first transparent container and the second transparent container are arranged in the second cavity, wherein the first transparent container is arranged beside one of the double slits, and the second transparent container is arranged beside the other slit of the double slit; the air pump is arranged outside the shell; one end of the air inlet pipe is connected to the air inlet, and the other end passes through the shell and is connected to the air pump; one end of the air outlet pipe is connected to the air outlet, and the other end passes through the shell.
3. The device for monitoring laboratory aerosol contamination according to claim 2, characterized in that: The sealed cavity is in a vacuum environment.
4. The device for monitoring laboratory aerosol contamination according to claim 2, characterized in that: The laboratory clean gas sealed in the first transparent container is preset clean air, and the number of air particles is less than 100 / m 3 .
5. The device for monitoring laboratory aerosol contamination according to claim 2, characterized in that: It also includes a photoresistor, an electric light bulb, and a circuit power supply; the photoresistor is arranged in the center of the light screen and on the center line between the two slits of the double slit plate; the photoresistor, the electric light bulb and the circuit power supply are connected in series to form a circuit.
6. The device for monitoring laboratory aerosol contamination according to claim 5, characterized in that: The photoresistor is a photoresistor whose resistance value increases as the light intensity increases.
7. The device for monitoring laboratory aerosol contamination according to claim 5, characterized in that: The light bulb is arranged outside the cubic structure formed by the housing and the light screen.
8. The device for monitoring laboratory aerosol contamination according to claim 2, characterized in that: The light source is a laser, which is arranged in the first cavity and on the side wall of the shell opposite to the double-slit plate; wherein the laser is provided with a switch, which is arranged outside the side wall.
9. The device for monitoring laboratory aerosol contamination according to claim 1, characterized in that: Also included is a gas flow rate controller for controlling the gas flow rate of the current laboratory gas input into the second transparent container.
10. The device for monitoring laboratory aerosol contamination according to claim 1, characterized in that: It also includes an optical element with adjustable refractive index, and the optical element with adjustable refractive index is arranged at the first transparent container.