Simulation device for laser atmospheric transmission attenuation effect

Abstract

The utility model 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] This invention belongs to the field of laser atmospheric transmission technology and relates to a simulation device for the attenuation effect of laser atmospheric transmission. Background Technology

[0002] In recent years, with the widespread application of laser-based damage and blinding weapons on the battlefield, the impact of weather conditions on their combat effectiveness has received considerable attention. In foggy weather, the air contains numerous tiny fog droplets, increasing the attenuation of laser transmission through the atmosphere and reducing its damage and blinding effects. Compared to the amount of fog droplets, visibility provides a more direct description of the atmospheric environment. Without considering sandstorms, higher visibility indicates a lower content of tiny fog droplets in the air, resulting in a lower impact on laser atmospheric transmission attenuation, and vice versa. Therefore, the impact of laser atmospheric transmission attenuation can be studied using the atmospheric environment as a characterization of visibility.

[0003] Uncontrollable weather conditions in natural environments make it difficult to conduct laser atmospheric transmission tests. Currently, there are some laboratory-based test devices that simulate visibility, such as the visibility simulation test chamber proposed in the paper "Comparison of Visibility Transmission Measurement and Scattering Measurement in Simulated Environments" and the 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 these devices take into account the transmission requirements of large-aperture, high-power lasers, or provide safety protection for high-power lasers. They also fail to consider the adjustment of the test optical path and cannot be used for laser atmospheric transmission attenuation tests. Utility Model Content

[0004] (I) Purpose of the utility model

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

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problems, this utility model provides a simulation device for the atmospheric transmission attenuation effect of lasers, comprising a rain and fog generation and control module 1, optical glass 2, optical channels 3, measuring instruments 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 generation and control module 1, and optical glass 2 is installed at the port of the optical channels 3; an observation window 6 is opened on the front side wall of the rain and fog generation and control module 1, an alarm 7 is installed at the top, and a leveling device 5 is installed at the bottom; a laser is arranged on the outside of the left optical glass 2, and a measuring instrument 4 is arranged on the outside of the right optical glass 2.

[0008] The fog generation and control module 1 generates tiny, evenly distributed fog droplets. Based on the correlation between fog concentration and visibility, it stably controls the air visibility within the simulation device by generating appropriate sizes and quantities of fog droplets. Fog levels are represented by visibility V: Light fog: 1000m ≤ V ≤ 10000m, Dense fog: 500m ≤ V ≤ 1000m, Dense fog: 200m ≤ V ≤ 500m, Very dense fog: 50m ≤ V ≤ 200m, Extremely dense fog: V ≤ 50m. Different fog levels are achieved by controlling the humidity and spray volume within the simulation device. Light fog is achieved by controlling the humidity within the simulation device, while Dense / Dense / Extremely dense fog is achieved by adjusting the spray volume.

[0009] Optical glass 2 consists of two pieces of quartz glass, located on either side of optical channel 3, for transmitting high-power lasers. The transmittance for lasers with wavelengths from 1030nm to 1090nm is higher than 99.5%. An optical protective film is deposited on the surface of optical glass 2, and the damage threshold of this film against 1055nm pulsed lasers is greater than 300J / cm². 2 The damage threshold of 1080nm continuous laser is greater than 8000W / cm. 2 This reduces the reflection and absorption of laser light, preventing damage to optical glass or other equipment.

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

[0011] 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 to meet the output spot size requirements of commonly used lasers. Lasers and measuring instruments 4 are placed on both sides of 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 instruments 4.

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

[0013] The optical glass 2 and the optical channel 3 are connected by a flexible installation technology and sealed with an elastic gasket to prevent damage to the optical glass 2 due to thermal expansion and contraction during the test. It can also prevent rain and fog from leaking out due to pressure differences inside and outside the device.

[0014] Measuring instrument 4 includes a power meter and a spot size analyzer. The power meter is used to measure laser power to evaluate laser power attenuation, and the spot size analyzer is used to measure the spatial distribution of laser power to assess laser scattering. Measuring instrument 4 is capable of azimuth and height adjustment.

[0015] The leveling component 5 consists of four independently adjustable lifting rods, located at the four bottom corners of the simulation device, which can level the simulation device and 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, which has a laser transmittance of no more than 0.001% in the main wavelength range, to prevent the laser from being scattered by droplets and causing harm to the operator.

[0017] Alarm 7 can monitor the working status of the simulation device based on sensor data within the simulation device. When the working status is abnormal, alarm 7 will emit a red flashing light and an alarm sound, and a signal interface is reserved. Laser 7 can automatically shut down based on abnormal signals.

[0018] (III) Beneficial Effects

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

[0020] (1) The simulation device of this utility model can simulate different atmospheric visibility environments in the laboratory and can quantitatively adjust the visibility in the device to study the transmission attenuation of laser in different visibility atmospheric environments.

[0021] (2) The optical channel of this utility model can effectively reduce the fog concentration at the optical glass outside the channel, prevent condensation on the surface of the optical glass, and avoid the high-energy laser interacting with the condensation when passing through the optical glass, thus preventing damage to the test equipment.

[0022] (3) The simulation device of this utility model 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. Attached Figure Description

[0023] Figure 1 This is a left view of the simulation device of this utility model.

[0024] Figure 2 This is a front view of the simulation device of this utility model.

[0025] Among them, 1-rain and fog generation and control device, 2-optical glass, 3-optical channel, 4-measuring instrument, 5-leveling device, 6-observation window, 7-alarm. Detailed Implementation

[0026] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0027] Reference Figure 1 and Figure 2 As shown, the simulation device for the atmospheric transmission attenuation effect of laser in this embodiment includes a rain and fog generation and control module 1, optical glass 2, optical channels 3, measuring instruments 4, leveling devices 5, observation windows 6, and alarms 7. Two optical channels 3 are symmetrically arranged on the left and right side walls of the rain and fog generation and control module 1, and 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 generation and control module 1, an alarm 7 is arranged at the top, and a leveling device 5 is arranged at the bottom. A laser is arranged on the outside of the optical glass 2 on the left side, and a measuring instrument 4 is arranged on the outside of the optical glass 2 on the right side.

[0028] Among them, the rain and fog generation and control module 1 can generate uniform fog droplets, with more than 90% of the droplets having a diameter of less than 10 μm. The fog concentration is adjusted according to the spray pressure, which is 70 to 170 kPa, and can simulate visibility in the range of 10 m to 10,000 m.

[0029] Optical glass 2 can accommodate a 200KW laser, and optical channel 3 has a diameter of 400mm to meet the power and aperture requirements of most laser atmospheric transmission experiments. Optical glass 2 consists of two pieces of quartz glass, located on either side of the optical channel, used to transmit high-power lasers. Its transmittance for lasers with wavelengths from 1030nm to 1090nm is higher than 99.5%. An optical protective film is coated on the surface of optical glass 2, and the damage threshold of this film for a 1055nm pulsed laser is greater than 300J / cm². 2 The damage threshold of 1080nm continuous laser is greater than 8000W / cm. 2 The optical glass is removable and replaceable to accommodate laser tests in different wavelength ranges.

[0030] The optical channel 3 is 1m long, keeping the optical glass 2 away from rain and fog to prevent condensation from forming on the inside of the optical glass 2. The optical channel 3 is detachable for easy 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 inside the simulation device stabilize, the laser emits a laser beam, which passes through the left optical glass 2, the left optical channel 3, different visibility atmospheric environments inside the simulation device, the right optical channel 3, and the right optical glass 2 in sequence before entering the testing channel of the measuring instrument 4.

[0032] Measuring instrument 4 includes an energy meter and a spot gauge. The energy meter can measure the laser power after it has been attenuated by rain and fog, and the spot gauge can measure the spatial distribution of the laser power.

[0033] The leveling component 5 is located at the bottom of the simulation device and consists of four independently adjustable lifting rods. First, adjust the two lifting rods at the rear of the simulation device and any one of the lifting rods 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, which has a laser transmittance of less than 0.001% in the wavelength range of 1030nm to 1090nm, preventing damage caused by laser scattering.

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

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for simulating the atmospheric transmission attenuation effect of laser, characterized in that, It includes a rain and fog generation and control module (1), optical glass (2), optical channel (3), measuring instrument (4), leveling component (5), observation window (6), and alarm (7); two optical channels (3) are symmetrically arranged on the left and right side walls of the rain and fog generation and control module (1), and 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 generation and control module (1), an alarm (7) is arranged at the top, and a leveling component (5) is arranged at the bottom; a laser is arranged on the outside of the optical glass (2) on the left, and a measuring instrument (4) is arranged on the outside of the optical glass (2) on the right.

2. The simulation device for laser atmospheric transmission attenuation effect as described in claim 1, characterized in that, The rain and fog generation and control module (1) generates uniformly distributed fog droplets, with more than 90% of the droplets having a diameter of less than 10 μm.

3. The simulation device for laser atmospheric transmission attenuation effect as described in claim 2, characterized in that, The optical glass (2) consists of two pieces of quartz glass, located on both sides of the optical channel (3), for transmitting high-power lasers. The transmittance of lasers with wavelengths of 1030nm~1090nm is higher than 99.5%.

4. The simulation device for laser atmospheric transmission attenuation effect as described in claim 3, characterized in that, An optical protective film is deposited on the surface of the optical glass (2). The damage threshold of the film to the 1055nm pulsed laser is greater than 300 J / cm², and the damage threshold of the 1080nm continuous laser is greater than 8000W / cm².

5. The simulation device for laser atmospheric transmission attenuation effect as described in claim 4, characterized in that, The optical glass (2) has a diameter 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. 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).

6. The simulation device for laser atmospheric transmission attenuation effect as described in claim 5, characterized in that, The optical channel (3) is longer than 1m. The optical glass (2) and the optical channel (3) are flexibly installed and sealed with elastic gaskets.

7. The simulation device for laser atmospheric transmission attenuation effect as described in claim 6, characterized in that, The measuring instrument (4) includes 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 orientation and height.

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

9. The simulation device for laser atmospheric transmission attenuation effect as described in claim 8, characterized in that, The observation window (6) is coated with a laser protective film.

10. The simulation device for laser atmospheric transmission attenuation effect as described in claim 9, characterized in that, The alarm (7) monitors the working status of the simulation device based on the sensor data in the simulation device. When the working status is abnormal, the alarm (7) emits a red flashing light and an alarm sound, and reserves a signal interface. The laser automatically shuts down according to the abnormal signal.

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