Device for testing optical loss of different liquids

Abstract

A device for testing optical loss of different liquids is characterized by comprising a laser (1), a cavity (2) and an integrating sphere (3), the cavity (2) is made of a transparent material on a light path of a light beam emitted by the laser (1); the cavity (2) internally comprises at least two sub-cavities (6) which are arranged along a light path of a light beam emitted by the laser (1) and are used for loading different liquids; and the integrating sphere (3) is positioned on a light path of a light beam emitted by the laser (1) so as to receive the light beam emitted by the laser (1) and detect the light power. According to the utility model, the convenience of measuring the laser loss of the liquid is greatly enhanced.

Description

Technical Field

[0001] This utility model relates to the field of liquid optical loss measurement technology, specifically to a device for testing the optical loss of different liquids. Background Technology

[0002] The current state of technology for measuring the loss of laser intensity by liquids involves several aspects, including the propagation characteristics of lasers in liquids and the loss mechanism of laser intensity by liquids.

[0003] Liquids have a lower compressibility than air, which creates a binding force on the expansion process of plasma, resulting in a short plasma lifetime and weak spectral radiation intensity in liquids. When lasers propagate in liquids, they are affected by absorption, scattering, and refraction, thus influencing the intensity of the laser beam.

[0004] Impurities, dissolved substances, and factors such as temperature and pressure in the liquid can all affect laser intensity loss. The flow state of the liquid can also affect laser propagation and loss.

[0005] Current techniques for measuring laser intensity loss in liquids still face many challenges, such as how to accurately measure the intensity loss of lasers in liquids and how to assess the impact of different factors on the loss. The short plasma lifetime and weak spectral radiation intensity in liquids limit the application of direct laser-liquid-penetration methods.

[0006] The application of laser-induced breakdown spectroscopy (LIBS) in liquids presents experimental complexities. For example, the influence of plasma shock waves on the liquid surface can cause splashing and surface ripples, interfering with the stability of the plasma spectrum. Fluctuations in the liquid jet can also affect the accuracy of experimental results.

[0007] The above background information is provided only to aid in understanding the inventive concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0008] Therefore, this utility model provides a device for testing the optical loss of different liquids, which can conveniently and quantitatively test the loss coefficient of different wavelengths for the same liquid, and can also conveniently and quantitatively test the loss coefficient of the same wavelength for different liquids, greatly enhancing the convenience of measuring the laser loss caused by liquids.

[0009] This utility model provides a device for testing different liquid optical losses, characterized in that it includes: a laser (1), a cavity (2) and an integrating sphere (3);

[0010] The cavity (2) is made of a transparent material in the optical path of the laser beam emitted by the laser (1);

[0011] The cavity (2) includes at least two sub-cavities (6) arranged along the optical path of the laser beam emitted by the laser (1) for loading different liquids;

[0012] The integrating sphere (3) is located in the optical path of the laser beam emitted by the laser (1) to receive the laser beam emitted by the laser (1) and detect the optical power.

[0013] Optionally, the apparatus for testing different liquid light loss is characterized in that each of the sub-cavities (6) is provided with a separate inlet (4) for injecting liquid into the sub-cavity (6).

[0014] Optionally, the device for testing the light loss of different liquids is characterized in that the inlet (4) is provided with a valve (12) or a controller (13) to control the speed of liquid inflow.

[0015] Optionally, the device for testing different liquid light loss is characterized in that the cavity (2) includes an outlet (5); the outlet (5) is used to drain the liquid from the sub-cavity (6).

[0016] Optionally, the device for testing different liquid light losses is characterized in that the inlet (4) is located above the sub-cavity (6) and the outlet (5) is located below the sub-cavity (6).

[0017] Optionally, the device for testing different liquid light loss is characterized in that a circuit (7) is provided in the sub-cavity (6) and connected to the inlet (4) so ​​that the liquid flows in the circuit (7).

[0018] Optionally, the apparatus for testing the light loss of different liquids is characterized in that it further includes a driving component (8) for driving the liquid to flow within the circuit (7).

[0019] Optionally, the apparatus for testing the light loss of different liquids is characterized in that the driving component (8) has different powers to make the liquid flow at different speeds.

[0020] Optionally, the apparatus for testing the optical loss of different liquids is characterized by further comprising:

[0021] A tachometer (9) is used to measure the flow rate of the liquid in the circuit (7).

[0022] Optionally, the apparatus for testing different liquid optical losses is characterized in that the laser (1) comprises:

[0023] A tunable laser (10) is used to emit laser beams of different wavelengths;

[0024] A power supply (11) is provided for supplying power to the tunable laser (10).

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention provides at least two sub-cavities (6) on the cavity (2), which can conveniently detect different liquids, thereby enabling rapid measurement of the loss coefficient of the same wavelength for different water bodies.

[0027] This invention utilizes an integrating sphere (3) for testing, ensuring a significant improvement in optical power accuracy.

[0028] This invention can use the same set of equipment to test the loss coefficient of different wavelengths for the same water body and the loss coefficient of the same wavelength for different water bodies. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort. Other features, objects, and advantages of this utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a device for testing the optical loss of different liquids according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of another device for testing the optical loss of different liquids in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the structure of a cavity in an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of another device for testing the light loss of different liquids in an embodiment of this utility model. Detailed Implementation

[0034] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0035] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] This invention provides an apparatus for testing the light loss of different liquids, aiming to solve the problems existing in the prior art.

[0037] The technical solutions of this utility model and this application solve the above-mentioned technical problems in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0038] Figure 1 This is a schematic diagram of a device for testing the optical loss of different liquids according to an embodiment of this utility model. Figure 1 As shown, an apparatus for testing different liquid optical losses in this embodiment of the present invention includes: a laser (1), a cavity (2), and an integrating sphere (3).

[0039] The laser (1) is one of the core components of this embodiment, responsible for emitting a light beam. This beam will pass through the liquid in the cavity (2) to test the optical loss characteristics of the liquid. The laser (1) typically has characteristics such as high stability, high power, and high monochromaticity to ensure the accuracy and reliability of the test results. Depending on the test requirements, the laser (1) can be a continuous wave laser (1) or a pulsed laser (1). The continuous wave laser (1) provides a stable beam and is suitable for long-term testing; the pulsed laser (1) provides a short-duration, high-intensity beam and is suitable for test scenarios requiring rapid response.

[0040] The cavity (2) includes at least two sub-cavities (6) arranged along the optical path of the laser beam emitted by the laser (1) for loading different liquids.

[0041] Specifically, the cavity is made of a transparent material along the optical path of the laser beam to ensure the beam can pass smoothly through the cavity and reach the integrating sphere. The choice of transparent material depends on the required optical properties and chemical stability. For example, for certain wavelengths of light, a material with high transmittance and low absorption may be necessary. The cavity includes at least two sub-cavities positioned along the optical path of the laser beam to hold different liquids. This design allows for testing the beam loss caused by multiple liquids in the same setup, improving testing efficiency and flexibility. Each sub-cavity should have sufficient capacity to ensure that the liquid fully covers the beam path during testing. The cavity needs to be well-sealed to prevent liquid leakage and the ingress of external impurities. This helps ensure the accuracy and reliability of the test results.

[0042] The integrating sphere (3) is located in the optical path of the laser beam emitted by the laser (1) to receive the laser beam emitted by the laser (1) and detect the optical power.

[0043] Specifically, the integrating sphere (3) is located in the optical path of the laser beam emitted by the laser (1) and is used to receive the beam emitted by the laser (1) and detect the optical power. The integrating sphere (3) is an optical element used to collect and homogenize the beam. The inside of the integrating sphere (3) is coated with a highly reflective material to ensure that the beam is reflected multiple times inside the sphere, thereby achieving uniform distribution and measurement of optical power. When the beam enters the integrating sphere (3), it will be reflected multiple times inside the sphere, forming diffuse reflection light. By measuring the intensity of the diffuse reflection light, the optical power of the original beam can be calculated. The design of the integrating sphere (3) makes the measurement of optical power more accurate and stable. The integrating sphere (3) has the characteristics of high sensitivity, high stability and high precision, and can accurately measure weak optical signals. At the same time, the integrating sphere (3) also has a wide spectral response range, which is suitable for beam measurement of different wavelengths.

[0044] When cavity (2) is empty, laser (1) is used for illumination, and the optical power measured by integrating sphere (3) is I0. The length of cavity (2) is designed to be L. When the liquid to be tested is injected into cavity (2), the laser will be absorbed and scattered when it passes through the liquid. At this time, the optical power measured by integrating sphere (3) is I. The liquid loss coefficient α can be calculated by the formula I=I0exp(-αL).

[0045] like Figure 2As shown, in some embodiments, each sub-cavity (6) is provided with a separate inlet (4) for injecting liquid into the sub-cavity (6). Each sub-cavity is equipped with an independent inlet, which means that liquid can be injected or replaced individually into each sub-cavity without interfering with other sub-cavities. This design allows for flexible adjustment of the type and quantity of liquid during testing, thereby providing a more comprehensive evaluation of the light beam loss caused by different liquids. The separate inlet makes the liquid injection process more precise and controllable. The liquid in each sub-cavity can be uniformly distributed and cover the entire path of the light beam by adjusting the injection speed, pressure, and liquid volume. This helps to reduce test errors caused by uneven liquid distribution and improve the accuracy of test results. The design also has good scalability. If more types of liquid need to be tested or the number of tests needs to be increased, more sub-cavities and corresponding inlets can simply be added to the cavity.

[0046] In some embodiments, the inlet (4) is equipped with a valve (12) or a controller (13) to control the rate of liquid inflow. The valve or controller can precisely adjust the liquid inflow rate, ensuring that the liquid enters the sub-cavity at a constant rate. This avoids liquid splashing, bubble generation, or uneven distribution along the beam path caused by sudden liquid inflow, thereby improving the accuracy of the test. Through the operation of the valve or controller, the user can flexibly adjust the liquid inflow rate to test light loss at different flow rates. Different liquids have different viscosities and fluidities, and the valve or controller can be adjusted accordingly based on the liquid's characteristics. This makes the testing device applicable to a wider range of liquids, improving the versatility and practicality of the test.

[0047] In some embodiments, the cavity (2) includes an outlet (5) for draining liquid from the sub-cavity (6). The main function of the outlet (5) is to allow the liquid in the sub-cavity (6) to be smoothly drained after the test. This ensures that the sub-cavity is thoroughly cleaned after each test, preparing it for the next test. Smooth drainage of the liquid also helps prevent liquid from stagnating in the sub-cavity, thereby avoiding test errors that may be caused by liquid evaporation, deterioration, or contamination. By providing an outlet, the liquid in the sub-cavity can be quickly replaced, thereby shortening the test cycle and improving test efficiency. This is especially important for applications that require testing a large number of different liquids or conducting continuous tests.

[0048] In some embodiments, the inlet (4) is located above the sub-cavity (6), and the outlet (5) is located below the sub-cavity (6). The sub-cavity (6) is designed to facilitate the injection and outflow of liquid while ensuring that the liquid does not leak during testing. Therefore, the sealing of the sub-cavity (6) is crucial. The inlet (4) is located above the sub-cavity (6) to facilitate the injection of the liquid to be tested into the sub-cavity (6). This design ensures that the liquid flows naturally into the sub-cavity (6) under the action of gravity, reducing resistance and the generation of air bubbles during the injection process.

[0049] The outlet (5) is located below the sub-cavity (6) and is used to drain the liquid after testing. This design ensures that the liquid flows out of the sub-cavity (6) naturally under gravity, reducing resistance and residue during the outflow process. The design of the outlet (5) should take into account the liquid discharge rate and discharge method to ensure that the liquid can be quickly and completely discharged from the sub-cavity (6) after the test. At the same time, the outlet (5) should also be equipped with a corresponding valve or controller to quickly and accurately control the liquid discharge when needed.

[0050] Figure 3 This is a schematic diagram of the structure of a cavity in an embodiment of this utility model. Figure 3 As shown, in some embodiments, a loop (7) is provided within the sub-cavity (6) and connected to the inlet (4) to allow liquid to flow within the loop (7). The loop (7) allows the liquid to form a closed circulation path within the sub-cavity (6). This means that the liquid can not only enter the sub-cavity from the inlet (4) but also flow continuously within the loop until it is discharged from the outlet (5) (if an outlet is designed). This circulating flow ensures that the liquid can more uniformly cover the beam path and reduces testing errors caused by uneven liquid distribution. Through circulating flow, the liquid can continuously interact with the beam, thus allowing for the measurement of light loss under dynamic liquid conditions.

[0051] In some embodiments, an apparatus for testing the light loss of different liquids further includes a driving component (8) for driving the liquid to flow within the circuit (7). The driving component (8) is a key component for enabling the liquid to flow within the circuit (7), providing the power required for the liquid flow. Different types of driving components (8) can be selected depending on different testing requirements and liquid properties. For example, mechanical driving methods such as hydraulic pumps and pneumatic pumps can be used, as well as electronically controlled driving methods such as electromagnetic driving and piezoelectric effect driving.

[0052] To precisely control the flow rate and velocity of the liquid, a corresponding controller or regulator can be equipped on the drive component (8). These controllers or regulators can quickly and accurately adjust the flow rate and velocity of the liquid according to the test requirements to ensure the accuracy of the test results.

[0053] In some embodiments, the drive component (8) has different powers to cause the liquid to flow at different speeds. The power adjustability of the drive component (8) is an important feature of this testing device. By adjusting the power of the drive component (8), the flow rate of the liquid in the cavity (2) can be precisely controlled. Different flow rates are crucial for testing the optical loss characteristics of different liquids. For example, in some cases, a slower flow rate may be more suitable for observing the interaction between the liquid and the light beam; while in other cases, a faster flow rate may be more helpful in simulating conditions in real-world applications. The drive components (8) with different powers make this testing device more adaptable and flexible. It can adapt to different types of liquids, different testing conditions, and different testing requirements. For example, for liquids with high viscosity, a higher power drive component (8) may be needed to overcome flow resistance; while for liquids with low viscosity, a lower power drive component (8) can be used to save energy and reduce wear.

[0054] In some embodiments, the cross-section of the loop (7) is circular. In this testing apparatus, the cross-section of the loop (7) is designed to be circular. A circular cross-section provides a uniform flow path, reduces eddies and turbulence during the flow process, thereby ensuring that the liquid flows at a stable speed in the loop (7). The circular cross-section of the loop (7) helps ensure that the liquid flows through the beam at a stable speed and in a uniform state during the test. This can improve the accuracy and reliability of the test and reduce errors caused by flow instability.

[0055] In some embodiments, an apparatus for testing the light loss of different liquids further includes a tachometer (9) for measuring the flow rate of the liquid in the circuit (7).

[0056] Specifically, a tachometer (9) is an instrument used to measure the rotational speed of a rotating object. It calculates the rotational speed by sensing or detecting the motion state of the rotating object. The working principle of a tachometer (9) may vary depending on the specific type, but common tachometers (9), such as centrifugal tachometers, magnetic tachometers, and electric tachometers (9), usually use principles such as centrifugal force, magnetic force, or alternating current to detect the rotational speed of a rotating object. In this testing device, the tachometer (9) may be directly or indirectly related to the flow of liquid. For example, it can estimate the flow velocity by measuring the rotational speed of the liquid in the circuit (7), or indirectly obtain flow velocity information by measuring the rotational speed of rotating components (such as turbines) related to the flow of liquid.

[0057] In some embodiments, an apparatus for testing the light loss of different liquids includes a tachometer (9) positioned in the middle of the loop (7). Placing the tachometer (9) in the middle of the loop (7) ensures that it measures the average flow velocity of the liquid throughout the entire loop (7), rather than just the flow velocity at the inlet (4) or outlet (5). This central position represents the overall flow state of the liquid in the loop (7), which helps to provide more comprehensive and accurate flow velocity data, thereby enabling a more accurate assessment of the light loss characteristics of the liquid.

[0058] Figure 4 This is a schematic diagram of another device for testing the optical loss of different liquids in an embodiment of this utility model. Figure 4 As shown, in some embodiments, the laser (1) includes:

[0059] A tunable laser (10) is used to emit laser beams of different wavelengths.

[0060] Specifically, a tunable laser (10) is a laser capable of emitting laser beams of multiple wavelengths, the output wavelength of which can be adjusted within a certain range. Tunable lasers (10) have wide applications in many fields such as spectroscopy, photochemistry, medicine, biology, integrated optics, pollution monitoring, semiconductor material processing, information processing, and communication. The working principle of a tunable laser (10) is based on the adjustment of an optical resonant cavity. By changing the length or refractive index of the resonant cavity, the wavelength of the laser can be changed, thereby achieving the purpose of adjusting the wavelength. Most tunable lasers (10) use a working substance with a broad fluorescence spectrum and achieve wavelength tuning by shifting the energy levels of the laser transition through certain components (such as gratings) or by changing certain external parameters (such as magnetic fields, temperature, etc.).

[0061] A power supply (11) is provided for supplying power to the tunable laser (10).

[0062] Specifically, the power supply (11) is the device that supplies power to the tunable laser (10), providing stable electrical energy to ensure the normal operation of the tunable laser (10). The stability and quality of the power supply (11) have a significant impact on the performance and output wavelength of the tunable laser (10). It is necessary to select an output voltage and current that match the tunable laser (10) to ensure that the tunable laser (10) can operate normally and emit the required wavelength. The stability of the power supply (11) has a significant impact on the output wavelength and performance of the tunable laser (10). Therefore, it is necessary to select a power supply (11) with high stability.

[0063] By adjusting the wavelength of the tunable laser (10), fixing the liquid in the cavity (2), and repeating the measurement, the loss coefficient of the tunable laser (10) at different wavelengths can be obtained. The loss produced by different wavelengths under the same liquid is different. Using this set of equipment, the optimal underwater tunable laser (10) wavelength band can be selected. The table below shows the loss coefficient results obtained by measuring tap water. It should be noted that due to regional differences in tap water and differences in measuring equipment, those skilled in the art may obtain data that deviates from the table below when using the equipment of this utility model for measurement, but this does not mean that this utility model cannot be implemented. On the contrary, those skilled in the art have reproduced the test effect of different wavelengths using the content disclosed in this utility model, proving that this utility model can be reproduced. The data in the table below are the data obtained by the applicant of this utility model when measuring with the device of this technical solution, and are only for reference by those skilled in the art, and do not mean that the same experimental data as this measurement can definitely be measured.

[0064] Waterborne optical power underwater optical power Water length Loss coefficient α Test wavelength <![CDATA[I0 / mW]]> I / mW L / m m-1 450nm 60 26.7 0.877 0.923239449 532nm 90 31 0.877 1.215304978

[0065] The tunable laser (10) in this embodiment can emit laser beams of multiple wavelengths, which enables the system to adapt to different application requirements; high-precision wavelength tuning and stable output can be achieved through precise current, temperature or mechanical control.

[0066] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0067] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. An apparatus for testing the optical loss of different liquids, characterized in that, include: Laser (1), cavity (2) and integrating sphere (3); The cavity (2) is made of a transparent material in the optical path of the laser beam emitted by the laser (1); The cavity (2) includes at least two sub-cavities (6) arranged along the optical path of the laser beam emitted by the laser (1) for loading different liquids; The integrating sphere (3) is located in the optical path of the laser beam emitted by the laser (1) to receive the laser beam emitted by the laser (1) and detect the optical power.

2. The apparatus for testing the optical loss of different liquids according to claim 1, characterized in that, Each of the sub-cavities (6) is provided with a separate inlet (4) for injecting liquid into the sub-cavity (6).

3. The apparatus for testing the optical loss of different liquids according to claim 2, characterized in that, The inlet (4) is equipped with a valve (12) or a controller (13) to control the rate at which liquid flows in.

4. The apparatus for testing the optical loss of different liquids according to claim 1, characterized in that, The cavity (2) includes an outlet (5); the outlet (5) is used to drain liquid from the sub-cavity (6).

5. The apparatus for testing the optical loss of different liquids according to claim 4, characterized in that, The inlet (4) is located above the sub-cavity (6), and the outlet (5) is located below the sub-cavity (6).

6. The apparatus for testing the optical loss of different liquids according to claim 2, characterized in that, A circuit (7) is provided inside the sub-cavity (6) and connected to the inlet (4) so ​​that liquid flows in the circuit (7).

7. The apparatus for testing the optical loss of different liquids according to claim 6, characterized in that, Also includes: A drive component (8) is used to drive the liquid to flow within the circuit (7).

8. The apparatus for testing the optical loss of different liquids according to claim 7, characterized in that, The drive component (8) has different powers to make the liquid flow at different speeds.

9. The apparatus for testing the optical loss of different liquids according to claim 6, characterized in that, Also includes: A tachometer (9) is used to measure the flow rate of the liquid in the circuit (7).

10. The apparatus for testing the optical loss of different liquids according to claim 1, characterized in that, The laser (1) includes: A tunable laser (10) is used to emit laser beams of different wavelengths; A power supply (11) is provided for supplying power to the tunable laser (10).

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