Simulation device for laser atmospheric transmission attenuation effect

Abstract

The invention discloses a simulation device for a laser atmospheric transmission attenuation effect. The simulation device comprises a rain and fog generation and control module (1), optical glass (2), an optical channel (3), a measuring instrument (4), a leveling device (5), an observation window (6) and an alarm (7), two optical channels (3) are symmetrically arranged on the left side wall and the right side wall of the rain and fog generation and control module (1), and optical glass (2) is arranged at ports of the optical channels (3). An observation window (6) is formed in the front side wall of the rain and fog generation and control module (1), an alarm (7) is arranged at the top, and a leveling assembly (5) is arranged at the bottom; a laser is arranged outside the left optical glass (2), and a measuring instrument (4) is arranged outside the right optical glass (2). The device can simulate different atmospheric visibility environments in a laboratory, can quantitatively adjust the visibility in the device, and is used for researching the transmission attenuation of laser in the atmospheric environments with different visibility.

Description

Technical Field

[0001] The invention belongs to the technical field of laser atmospheric transmission, and relates to a simulation device for laser atmospheric transmission attenuation effect. Background Art

[0002] In recent years, with the widespread use of laser damage and blinding weapons on the battlefield, the impact of weather conditions on their combat effectiveness has also attracted much attention. In foggy days, the air contains many tiny droplets, the transmission attenuation of the laser in the atmosphere increases, and the damage and blinding effects decrease. Compared with the content of droplets, visibility can more intuitively describe the atmospheric environment. Without considering sandstorms, the higher the visibility, the lower the content of tiny droplets in the air, and the lower the impact on the laser atmospheric transmission attenuation, and vice versa. Therefore, the impact of laser atmospheric transmission attenuation can be studied through the atmospheric environment characterized by visibility.

[0003] Weather conditions in the natural environment are uncontrollable, and laser atmospheric transmission tests are difficult to carry out. At present, there are some test devices that simulate visibility in the laboratory, such as a visibility simulation test box proposed in the paper "Comparison of visibility transmission measurement and scattering measurement in simulated environment", and a visibility simulation cabin involved in the patent "Combined visibility environment simulation test cabin system [P]. Chinese Patent: CN202121721045.X, 2022.03.01". However, none of them takes into account the needs of large-caliber and high-power laser transmission, does not provide safety protection for high-power lasers, and does not consider the adjustment of the test optical path, and cannot be used for laser atmospheric transmission attenuation tests. Summary of the invention

[0004] (I) Purpose of the invention

[0005] The purpose of the present invention is to design a simulation device for the attenuation effect of laser atmospheric transmission, which can simulate various visibility environments in the laboratory and is used for studying the attenuation of laser atmospheric transmission.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a simulation device for the attenuation effect of laser atmospheric transmission, comprising a rain and fog generating and control module 1, an optical glass 2, an optical channel 3, a measuring instrument 4, a leveling device 5, an observation window 6, and an alarm 7; two optical channels 3 are symmetrically arranged on the left and right side walls of the rain and fog generating and control module 1, and the optical glass 2 is arranged at the port of the optical channel 3; an observation window 6 is opened on the front side wall of the rain and fog generating and control module 1, an alarm 7 is arranged on the top, and a leveling component 5 is arranged on the bottom; a laser is arranged on the outer side of the optical glass 2 on the left, and a measuring instrument 4 is arranged on the outer side of the optical glass 2 on the right.

[0008] Among them, the rain and fog generation and control module 1 can generate tiny and evenly distributed fog droplets. According to the corresponding relationship between fog concentration and visibility, the air visibility in the simulation device is stably controlled by generating fog droplets of appropriate size and quantity. The fog level is characterized by visibility V: light fog: 1000m≤V≤10000m, heavy fog: 500m≤V≤1000m, dense fog: 200m≤V≤500m, strong dense fog: 50m≤V≤200m, and extra-strong dense fog: V≤50m. Different fog levels are achieved by controlling the humidity and spray volume in the simulation device. Light fog is achieved by controlling the humidity in the simulation device, and heavy fog / dense fog / extra-dense fog is achieved by adjusting the amount of spray.

[0009] Optical glass 2 is two pieces of quartz glass, located on both sides of optical channel 3, used to transmit high-power laser. The transmittance of 1030nm~1090nm wavelength laser is higher than 99.5%. Optical protective film is plated on the surface of optical glass 2. The damage threshold of the film layer to 1055nm pulse laser is higher than 300J / cm 2 , the damage threshold of 1080nm continuous laser is greater than 8000W / cm 2 , reduce the reflection and absorption of laser and avoid damage to optical glass or other equipment;

[0010] The diameter of optical glass 2 is greater than 400 mm and can be disassembled during transportation. When testing lasers of different wavelengths, it is necessary to replace the quartz glass with a laser transmittance of more than 99% at the corresponding wavelength. The test laser power density should be lower than the damage threshold.

[0011] Optical channel 3 is used for laser transmission. Two optical channels 3 are coaxial and have a diameter of not less than 400 mm to meet the requirements of the output spot size of common lasers. Lasers and measuring instruments 4 are placed on both sides of the optical channel 3. The laser emitted by the laser is attenuated by the low-visibility atmospheric environment in the simulation device and then received and measured by the measuring instrument 4;

[0012] The length of the optical channel 3 should be greater than 1m to reduce the fog concentration outside the channel, keep the optical glass 2 away from the water fog, reduce the probability of condensed water on the surface of the optical glass 2, and avoid the interaction between the high-energy laser and the condensed water on the surface of the optical glass 2 to damage the test equipment;

[0013] Flexible installation technology is used between the optical glass 2 and the optical channel 3, and elastic gaskets are used for sealing to avoid damage to the optical glass 2 due to thermal expansion and contraction during the test, and to prevent rain and fog from overflowing due to different pressures inside and outside the device;

[0014] The measuring instrument 4 includes a power meter and a spot meter. The power meter is used to measure the laser power to evaluate the laser power attenuation, and the spot meter is used to measure the spatial distribution of the laser power to evaluate the scattering of the laser. The measuring instrument 4 can be adjusted in azimuth and height;

[0015] The leveling assembly 5 is composed of four independently liftable lifting rods, which are respectively located at the four bottom corners of the simulation device, and can level the simulation device to ensure that the left and right optical channels are on the same horizontal line;

[0016] The observation window 6 is coated with a laser protection film, and the transmittance of the laser within the main wavelength range is not more than 0.001%, so as to prevent the laser from causing harm to the operator after being scattered by the droplets;

[0017] The alarm 7 can monitor the working state of the simulation device according to the sensor data in the simulation device. When the working state is abnormal, the alarm 7 emits a red flashing light and an alarm sound, and a signal interface is reserved. The laser 7 can be automatically shut down according to the abnormal signal.

[0018] (III) Beneficial effects

[0019] The device for simulating the attenuation effect of laser atmospheric transmission provided by the above technical solution has the following beneficial effects:

[0020] (1) The simulation device of the present invention can simulate different atmospheric visibility environments in the laboratory and can quantitatively adjust the visibility in the device, so as to study the transmission attenuation of laser in different visibility atmospheric environments;

[0021] (2) The optical channel of the present invention can effectively reduce the fog concentration at the optical glass outside the channel, prevent condensation from forming on the surface of the optical glass, and avoid the interaction between high-energy laser and condensation when passing through the optical glass, thereby preventing the test equipment from being damaged;

[0022] (3) The simulation device of the present invention is designed with a leveling device, which can level the optical channel to ensure that the left and right optical channels are on the same horizontal line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the left view of the simulation device of the present invention.

[0024] Figure 2 It is a front view of the simulation device of the present invention.

[0025] Among them, 1-rain and fog generating and controlling device, 2-optical glass, 3-optical channel, 4-measuring instrument, 5-leveling device, 6-observation window, 7-alarm. DETAILED DESCRIPTION

[0026] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0027] Reference Figure 1 and Figure 2 As shown, the simulation device for laser atmospheric transmission attenuation effect of the present embodiment includes a rain and fog generating and controlling module 1, an optical glass 2, an optical channel 3, a measuring instrument 4, a leveling device 5, an observation window 6, and an alarm 7; two optical channels 3 are symmetrically arranged on the left and right side walls of the rain and fog generating and controlling module 1, and an optical glass 2 is arranged at the port of the optical channel 3; an observation window 6 is opened on the front side wall of the rain and fog generating and controlling module 1, an alarm 7 is arranged on the top, and a leveling component 5 is arranged on the bottom; a laser is arranged on the outer side of the optical glass 2 on the left, and a measuring instrument 4 is arranged on the outer side of the optical glass 2 on the right.

[0028] Among them, the rain and fog generation and control module 1 can produce uniform fog droplets, and fog droplets with a diameter less than 10um account for more than 90%. The fog concentration is adjusted according to the spray pressure, and the spray pressure is 70-170Kpa, which can simulate the visibility range of 10m-10000m.

[0029] Optical glass 2 can accommodate 200KW laser passing through, and the diameter of optical channel 3 is 400mm to meet the power and aperture requirements of most laser atmospheric transmission tests. Optical glass 2 is two pieces of quartz glass, located on both sides of the optical channel, used to pass high-power lasers. The transmittance of 1030nm~1090nm wavelength lasers is higher than 99.5%. An optical protective film is coated on the surface of optical glass 2, and the damage threshold of the film layer to 1055nm pulse laser is greater than 300J / cm 2 , the damage threshold of 1080nm continuous laser is greater than 8000W / cm 2 , the optical glass can be removed and replaced to adapt to laser tests in different wavelength ranges.

[0030] The optical channel 3 is 1 m long, so as to keep the optical glass 2 away from rain and fog to prevent condensation water from being generated on the inner side of the optical glass 2. The optical channel 3 is detachable to facilitate transportation and installation.

[0031] The laser is placed outside the left optical glass 2, and the measuring instrument 4 is placed outside the right optical glass 2. After the temperature, humidity and fog concentration in the simulation device are stable, the laser emits a laser, which passes through the left optical glass 2, the left optical channel 3, the atmospheric environment with different visibility in the simulation device, the right optical channel 3, the right optical glass 2, and then enters the test channel of the measuring instrument 4.

[0032] The measuring instrument 4 includes an energy meter, a target spot meter, etc. The energy meter can measure the laser power after attenuation by rain and fog, and the target spot meter can measure the spatial distribution of the laser power.

[0033] The leveling assembly 5 is located at the bottom of the simulation device and is composed of four independently adjustable lifting rods. First, adjust the two lifting rods at the rear of the simulation device and any one lifting rod at the front. After the simulation device is leveled, adjust the other lifting rod at the front until the simulation device is horizontal and stable.

[0034] The observation window 6 is coated with an optical protective film, and the transmittance of the laser within the wavelength range of 1030nm to 1090nm is less than 0.001%, so as to prevent damage caused by laser scattering.

[0035] The alarm 7 monitors the working state of the simulation device through sensors. When the working state is abnormal, the alarm 7 emits red flashing light and alarm sound, and a signal interface is reserved. The laser can be automatically shut down according to the abnormal signal.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for simulating the attenuation effect of laser atmospheric transmission, characterized in that: The invention comprises a rain and fog generating and control module (1), an optical glass (2), an optical channel (3), a measuring instrument (4), a leveling device (5), an observation window (6), and an alarm (7); two optical channels (3) are symmetrically arranged on the left and right side walls of the rain and fog generating and control module (1), and the ports of the optical channels (3) are arranged with optical glass (2); an observation window (6) is provided on the front side wall of the rain and fog generating and control module (1), an alarm (7) is arranged on the top, and a leveling component (5) is arranged on the bottom; a laser is arranged on the outer side of the optical glass (2) on the left, and a measuring instrument (4) is arranged on the outer side of the optical glass (2) on the right.

2. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 1, characterized in that: The rain and fog generation and control module (1) generates uniformly distributed fog droplets, with fog droplets with diameters less than 10 μm accounting for more than 90%.

3. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 2, characterized in that: The optical glass (2) is two pieces of quartz glass, which are respectively located on both sides of the optical channel (3) and are used to transmit high-power lasers. The transmittance of lasers with a wavelength of 1030nm to 1090nm is higher than 99.5%.

4. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 3, characterized in that: An optical protective film is plated on the surface of the optical glass (2), wherein the damage threshold of the film layer to a 1055nm pulse laser is greater than 300J / cm 2 , the damage threshold of 1080nm continuous laser is greater than 8000W / cm 2 .

5. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 4, characterized in that: The diameter of the optical glass (2) is greater than 400 mm; the optical channel (3) is used for laser transmission, the two optical channels (3) are coaxial and have a diameter of not less than 400 mm, and the laser light emitted by the laser is attenuated by the low-visibility atmospheric environment in the simulation device and then received and measured by the measuring instrument (4).

6. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 5, characterized in that: The length of the optical channel (3) is greater than 1 m, the optical glass (2) and the optical channel (3) are flexibly installed, and an elastic gasket is used for sealing.

7. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 6, characterized in that: The measuring instrument (4) comprises a power meter and a target spot meter. The power meter is used to measure the laser power, and the target spot meter is used to measure the spatial distribution of the laser power. The measuring instrument (4) can be adjusted in terms of orientation and height.

8. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 7, characterized in that: The leveling component (5) consists of four independently liftable lifting rods, which are respectively located at the four bottom corners of the simulation device, and are used to level the simulation device so that the left and right optical channels are located on the same horizontal line.

9. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 8, characterized in that: The observation window (6) is coated with a laser protection film.

10. The device for simulating the attenuation effect of laser atmospheric transmission according to claim 9, characterized in that: The alarm (7) monitors the working state in the simulation device according to the sensor data in the simulation device. When the working state is abnormal, the alarm (7) emits red flashing light and an alarm sound, and a signal interface is reserved. The laser (7) is automatically shut down according to the abnormal signal.

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