Multi-parameter binocular laser warning device for measuring distance of approaching laser target

Abstract

The application belongs to the technical field of laser warning devices, and particularly relates to a multi-parameter binocular laser warning device for measuring the distance of an incoming laser target, wherein a light shield is arranged on a receiving window, a measuring laser wavelength and direction module, a measuring laser pulse width module and a measuring laser distance module are respectively arranged on the light path direction of the receiving window, and the measuring laser wavelength and direction module, the measuring laser pulse width module and the measuring laser distance module are electrically connected to a control and data processing module. The 0th and 1st light spots formed by grating diffraction are used for wavelength and angle measurement, the time interval of a laser pulse signal is measured to realize the pulse width measurement of the incoming laser, and the two 0th light spots imaged by two detectors are used for laser distance measurement and calculation, so as to realize the measurement of the wavelength, direction, pulse width and distance parameters of the incoming laser.

Description

Technical Field

[0001] This invention belongs to the field of laser warning device technology, specifically relating to a multi-parameter binocular laser warning device for measuring the distance to an incoming laser target. Background Technology

[0002] Laser testing technology is a crucial component of optoelectronic information testing. Its function is to detect laser equipment, laser weapons, and other equipment to determine the direction, distance, and characteristics of the laser, thereby assessing its performance and providing a basis for laser equipment development and acceptance, periodic optimization and calibration, and maintenance. The rapid and accurate acquisition of parameters such as wavelength, azimuth, elevation angle, pulse width, and distance of incoming lasers is the core of laser pulse width measurement technology. Because different types and wavelengths of lasers have different applications, only by accurately acquiring information on the incident laser wavelength, azimuth, and distance, as well as the pulse width of pulsed lasers, can the type and location of incoming lasers be correctly identified, and the performance of pulsed lasers be assessed. This allows for interception and disruption based on the direction of laser weapons, interfering with them and causing them to lose their target. Current laser warning systems can only measure the wavelength, direction, and pulse width parameters of incoming lasers, but cannot measure their distance. Summary of the Invention

[0003] To address the technical problem of existing laser alarms, which can only measure the wavelength, direction, and pulse width parameters of incoming lasers but cannot measure their distance, this invention provides a multi-parameter binocular laser alarm device for measuring the distance to an incoming laser target. By adding an additional lens and employing parallax ranging, the distance to the laser source is calculated. Wavelength and angle measurements are achieved using the 0th and 1st orders of the grating diffraction spot, and the pulse width of the incoming laser is measured by measuring the time interval of the laser pulse signal. This allows for the measurement of the wavelength, direction, pulse width, and distance parameters of the incoming laser.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A multi-parameter binocular laser alarm device for measuring the distance to an incoming laser target includes a light shield, a receiving window, a laser wavelength and direction measurement module, a laser pulse width measurement module, a laser distance measurement module, and a control and data processing module. The light shield is disposed on the receiving window, and the laser wavelength and direction measurement module, the laser pulse width measurement module, and the laser distance measurement module are respectively disposed along the optical path direction of the receiving window. The laser wavelength and direction measurement module, the laser pulse width measurement module, and the laser distance measurement module are all electrically connected to the control and data processing module.

[0006] The laser wavelength and direction measurement module includes a wideband grating, a first optical system, and a first focal plane detector. The wideband grating is positioned in the optical path direction of the receiving window, the first optical system is positioned in the optical path direction of the wideband grating, and the first focal plane detector is positioned in the optical path direction of the first optical system. The first focal plane detector is electrically connected to the control and data processing module.

[0007] The laser pulse width measurement module includes a high-speed photodetector, a pulse shaping circuit, and a time measurement unit. The high-speed photodetector is positioned in the optical path direction of the receiving window, the pulse shaping circuit is positioned in the optical path direction of the high-speed photodetector, the time measurement unit is electrically connected to the pulse shaping circuit, and the time measurement unit is electrically connected to the control and data processing module.

[0008] The laser distance measurement module includes a second optical system and a second focal plane detector. The second optical system is positioned in the optical path direction of the receiving window, and the second focal plane detector is positioned in the optical path direction of the second optical system. The second focal plane detector is electrically connected to the control and data processing module.

[0009] An alarm method for a multi-parameter binocular laser alarm device that measures the distance to an incoming laser target includes the following steps:

[0010] S1. A light shield blocks interference from sunlight, lightning, and other light outside the field of view; a wide-band grating is used to diffract incoming laser light.

[0011] S2, the first optical system and the second optical system filter out strong background light noise, and at the same time focus the diffracted beam onto the plane detector and the second focal plane detector to form a light spot and improve the light spot extraction accuracy.

[0012] S3. The high-speed photodetector performs photoelectric conversion, converting the laser signal into an electrical signal; the pulse shaping circuit processes the converted electrical signal to meet the input requirements of the time measurement unit; the time measurement unit can convert the pulse width measurement into a pulse time interval and measure the value of the pulse time interval.

[0013] S4. The azimuth and elevation angles of the incoming laser are calculated using the horizontal and vertical coordinates of the 0th order diffraction spot of the first focal plane detector, and the wavelength of the incoming laser is calculated using the distance between the 0th and 1st order diffraction spots of the first focal plane detector.

[0014] S5. The pulse width of the incoming laser is obtained by calculating the time interval between two pulse edges using a time measurement unit.

[0015] S6. The distance of the incoming laser is calculated by the horizontal and vertical coordinates of two 0th-order light spots on the first and second focal plane detectors.

[0016] The method for measuring the wavelength and direction of the incoming laser in S4 is as follows:

[0017] The incoming laser enters the laser wavelength and direction measurement module, which consists of a wide-band grating, a first optical system, and a first focal plane detector. This module detects the wavelength, azimuth, and elevation angle of the incoming laser. The azimuth angle is measured using the horizontal coordinate of the 0th-order diffraction spot on the first focal plane detector; the elevation angle is measured using the vertical coordinate of the 0th-order diffraction spot; and the wavelength is measured using the distance between the 0th and 1st-order diffraction spots. The wide-band grating diffracts the incoming laser. The first optical system filters out strong background noise and focuses the diffracted beam onto the first focal plane detector. The horizontal and vertical coordinates of the 0th-order and 1st-order diffraction spots are obtained through the first focal plane detector. The first focal plane detector transmits this position information to the control and data processing module, which then calculates the direction and wavelength of the incoming laser.

[0018] The pulse width measurement method for the incoming laser in S5 is as follows:

[0019] The incoming laser pulse width measurement module, consisting of a high-speed photodetector, a pulse shaping circuit, and a time measurement unit, measures the pulse width of the incoming laser. It converts the pulse width by comparing the time interval between adjacent rising and falling edges of the pulse signal. Specifically, the high-speed photodetector converts the incoming laser into an electrical signal, the pulse shaping circuit amplifies this signal, and the resulting differential signal is transmitted to the time measurement unit. The time measurement unit receives the processed electrical signal, converts the pulse width into the time interval between two pulse edges, and calculates the pulse width by comparing the time intervals between two adjacent rising and falling edges. The control and data processing module generates the drive signal to the time measurement unit, controlling it to measure the pulse width and ultimately completing the pulse width measurement of the incoming laser.

[0020] The distance measurement method for the incoming laser in S6 is as follows:

[0021] The incoming laser enters the laser distance measurement module, which consists of a second optical system and a second focal plane detector. The azimuth angle of the incoming laser is measured using the abscissa of the 0th-order diffraction spot on the second focal plane detector, and the elevation angle is measured using the ordinate of the 0th-order diffraction spot. The second optical system filters out strong background noise and focuses the beam onto the second focal plane detector to obtain the abscissa and ordinate positions of the laser's 0th-order spot. The second focal plane detector transmits the position information to the control and data processing module, which calculates the direction of the incoming laser. Combining this with the abscissa and ordinate positions of the 0th-order spot measured by the laser wavelength and direction measurement module, the distance to the incoming laser source is calculated. Let the xoy plane be the detector plane, and x0 be the distance from the laser to the first focal plane. Let x0' be the zero-order spot on the detector, where the laser beam illuminates the second focal plane detector. Let AO be the laser beam illuminating the first detector, and AE be the laser beam illuminating the second detector. Let α1, β1, and γ1 be the intersections of the laser AO direction with the x, y, and z axes, respectively, and α2, β2, and γ2 be the intersections of the laser AE direction with the x, y, and z axes, respectively. Let OE be the distance d between the two zero-order spots. AO and AE are the desired laser distances. Since d is much smaller than AO and AE, AO and AE are approximately equal. Let the zero-order spot on the first focal plane detector and its coordinates be x0(x0, y0), and the zero-order spot on the second focal plane detector and its coordinates be x0'(x0', y0'). Let the azimuth angle of the laser AO direction be θ1, and the elevation angle be... The azimuth angle of the laser AE direction is θ2, and the elevation angle is... Detailed calculations are performed:

[0022] The abscissa and ordinate positions x0 of the zero-order diffraction spot in the laser AO direction are obtained by the first focal plane detector, and the abscissa and ordinate positions x0' of the zero-order diffraction spot in the laser AE direction are obtained by the second focal plane detector. According to the diffraction equation, we get:

[0023]

[0024] The direction of laser AE is calculated as follows:

[0025]

[0026] From (1-1), we can derive the azimuth angle θ1 and elevation angle in the AO direction.

[0027]

[0028] From (1-2), we can derive the azimuth angle θ2 and the elevation angle in the AE direction.

[0029]

[0030] The intersection points α1, β1, γ1 of the laser AO direction with the x, y, and z axes, and the intersection points α2, β2, γ2 of the laser AE direction with the x, y, and z axes, are related as follows:

[0031] cos 2 α+cos 2 β+cos 2 γ = 1

[0032] Therefore, we can conclude that:

[0033]

[0034]

[0035] Azimuth angle θ1 and elevation angle in the laser AO direction The intersection points α1, β1, and γ1 of the laser beam along the AO direction with the x, y, and z axes have the following relationships:

[0036]

[0037] Azimuth angle θ1 and elevation angle in the laser AE direction The intersection points α1, β1, and γ1 of the laser beam along the AE direction with the x, y, and z axes have the following relationships:

[0038]

[0039] Substituting α1 and α2 into the equation, we obtain γ1 and γ2:

[0040]

[0041]

[0042]

[0043] Let the distance between the two light spots be d, the distance from light spot x1 to the z-axis be x, and the depth of the laser from the detector be a. γ1 and γ2 have already been derived, therefore:

[0044]

[0045] Therefore, x is derived:

[0046]

[0047] Finally, we can obtain AO:

[0048]

[0049] Since d is much smaller than AO and AE, AO and AE are approximately equal.

[0050] Compared with the prior art, the beneficial effects of this invention are:

[0051] This invention uses parallax ranging with an additional set of lenses to calculate the distance to the laser source. Furthermore, it achieves wavelength and angle measurement through the 0th and 1st orders of the grating diffraction spot, and measures the pulse width of the incoming laser by measuring the time interval of the laser pulse signal, thereby enabling the measurement of the wavelength, direction, pulse width, and distance parameters of the incoming laser. Attached Figure Description

[0052] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0053] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0054] Figure 1 This is a schematic diagram of the structure of the present invention;

[0055] Figure 2 This is the optical path diagram of the laser wavelength and direction measurement module of the present invention;

[0056] Figure 3 This is the optical path diagram of the laser pulse width measurement module of the present invention;

[0057] Figure 4 This is the optical path diagram of the laser distance measurement module of the present invention;

[0058] Figure 5 This is a three-dimensional schematic diagram of the laser distance measurement module of the present invention;

[0059] Figure 6 This is a schematic diagram illustrating the principle of laser distance calculation in this invention.

[0060] Wherein: 1 is a light shield, 2 is a receiving window, 3 is a module for measuring laser wavelength and direction, 3-1 is a wideband grating, 3-2 is the first optical system, 3-3 is the first focal plane detector, 4 is a module for measuring laser pulse width, 4-1 is a high-speed photodetector, 4-2 is a pulse shaping circuit, 4-3 is a time measurement unit, 5 is a module for measuring laser distance, 5-1 is the second optical system, 5-2 is the second focal plane detector, and 6 is a control and data processing module. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. These descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the claims of the present invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] In this embodiment, as Figure 1As shown, the alarm device mainly consists of a light shield 1, a receiving window 2, a laser wavelength and direction measurement module 3, a laser pulse width measurement module 4, a laser distance measurement module 5, and a control and data processing module 6. The laser wavelength and direction measurement module 3 comprises a wideband grating 3-1, a first optical system 3-2, and a first focal plane detector 3-3, and is mainly used to measure the laser wavelength, azimuth angle, and elevation angle. The laser pulse width measurement module 4 comprises a high-speed photodetector 4-1, a pulse shaping circuit 4-2, and a time measurement unit 4-3. The system is designed to detect laser pulse width. The laser distance measurement module 5, composed of a second optical system 5-1 and a second focal plane detector 5-2, is primarily used to detect the azimuth and elevation angles of the laser. The control and data processing module 6 mainly controls and processes data from the first focal plane detector 3-3, the time measurement unit 4-3, and the second focal plane detector 5-2. The light shield 1 is mainly used to block interference from sunlight, lightning, and other light outside the field of view. The wideband grating 3-1 is used to diffract incoming laser light. The first optical... System 3-2 and the second optical system 5-1 are used to filter out strong background light noise, and simultaneously focus the diffracted beam onto the plane detector 3-3 and the second focal plane detector 5-2 to form a light spot and improve the spot extraction accuracy. The high-speed photodetector 4-1 is mainly used for photoelectric conversion, converting the laser signal into an electrical signal. The pulse shaping circuit 4-2 processes the converted electrical signal to meet the input requirements of the time measurement unit 4-3. The time measurement unit 4-3 converts the pulse width measurement into a pulse time interval, measuring the value of the pulse time interval. The azimuth and elevation angles of the incoming laser are calculated using the horizontal and vertical coordinates of the 0th-order diffracted spot of the first focal plane detector 3-3. The wavelength of the incoming laser is calculated using the distance between the 0th and 1st-order diffracted spots of the first focal plane detector 3-3. The pulse width of the incoming laser is obtained by calculating the time interval between two pulse edges using the time measurement unit 4-3. The distance of the incoming laser is calculated using the horizontal and vertical coordinates of the two 0th-order spots on the first focal plane detector 3-3 and the second focal plane detector 5-2. The specific scheme is as follows:

[0066] 1. Measurement of the wavelength and direction of the incoming laser:

[0067] The incoming laser enters the laser wavelength and direction measurement module 3, and its optical path is as follows: Figure 2As shown, a system consisting of a wideband grating 3-1, a first optical system 3-2, and a first focal plane detector 3-3 is used to detect the wavelength, azimuth, and elevation angle of an incoming laser. The azimuth angle of the incoming laser is measured by the horizontal coordinate of the 0th-order diffraction spot of the first focal plane detector 3-3; the elevation angle of the incoming laser is measured by the vertical coordinate of the 0th-order diffraction spot; and the wavelength of the incoming laser is measured by the distance between the 0th and 1st-order diffraction spots. The wideband grating 3-1 diffracts the incoming laser; the first optical system 3-2 is used to filter out strong background light noise and focus the diffracted beam onto the first focal plane detector 3-3; the horizontal and vertical coordinates of the 0th-order and 1st-order diffraction spots of the laser are obtained by the first focal plane detector 3-3; the first focal plane detector 3-3 transmits the position information to the control and data processing module 6; and the direction and wavelength of the incoming laser are calculated on the control and data processing module 6.

[0068] 2. Measurement of the pulse width of the incoming laser:

[0069] The incoming laser enters the laser pulse width measurement module 4, and its optical path is as follows: Figure 3 As shown, the system comprises a high-speed photodetector 4-1, a pulse shaping circuit 4-2, and a time measurement unit 4-3. It is used to measure the pulse width of an incoming laser beam by comparing and calculating the time interval between adjacent rising and falling edges of the pulse signal. Specifically, the high-speed photodetector 4-1 converts the incoming laser beam into an electrical signal, the pulse shaping circuit 4-2 amplifies the electrical signal, and the resulting differential signal is transmitted to the time measurement unit 4-3. The time measurement unit 4-3 receives the processed electrical signal, converts the pulse width into the time interval between two pulse edges, and calculates the pulse width by comparing the time intervals between two adjacent rising and falling edges. The control and data processing module 6 is responsible for generating the drive signal to drive the time measurement unit 4-3, controlling the time measurement unit 4-3 to complete the pulse width measurement, ultimately completing the measurement of the incoming laser beam's pulse width.

[0070] 3. Distance measurement of incoming laser:

[0071] The incoming laser enters the laser distance measurement module 5, and its optical path is as follows: Figure 4As shown, the system consists of a second optical system 5-1 and a second focal plane detector 5-2. The azimuth angle of the incoming laser is measured by the horizontal coordinate of the 0th-order diffraction spot of the second focal plane detector 5-2, and the elevation angle of the incoming laser is measured by the vertical coordinate of the 0th-order diffraction spot. The second optical system 5-1 is used to filter out strong background light noise and focus the beam onto the second focal plane detector 5-2 to obtain the horizontal and vertical coordinate positions of the laser 0th-order spot. The second focal plane detector 5-2 transmits the position information to the control and data processing module 6. The control and data processing module 6 calculates the direction of the incoming laser. Combined with the horizontal and vertical coordinate positions of the laser 0th-order spot measured by the laser wavelength and direction measurement module 3, the direction and wavelength of the incoming laser are calculated. Figure 5 This is a three-dimensional schematic diagram for measuring laser distance. The xoy plane is the detector plane, x0 is the zero-order spot of the laser illuminating the first focal plane detector 3-3, and x0' is the zero-order spot of the laser illuminating the second focal plane detector 5-2. The laser ray illuminating the first detector is denoted as AO, and the laser ray illuminating the second detector is denoted as AE. Let α1, β1, and γ1 be the intersection points of the laser AO direction with the x, y, and z axes, respectively; let α2, β2, and γ2 be the intersection points of the laser AE direction with the x, y, and z axes, respectively; OE is the distance d between the zero-order spots of the two detectors; AO and AE are the desired laser distances. Since d is much smaller than AO and AE, AO and AE are approximately equal. Figure 6 The diagram illustrates the principle of laser distance calculation. It defines the zero-order spot on the first focal plane detector and its coordinates x0(x0, y0), the zero-order spot on the second focal plane detector and its coordinates x0'(x0', y0'), and the azimuth angle of the laser AO direction as θ1 and the elevation angle as... The azimuth angle of the laser AE direction is θ2, and the elevation angle is... Detailed calculations are performed:

[0072] The abscissa and ordinate position x0 of the zero-order diffraction spot in the laser AO direction is obtained by the first focal plane detector 3-3, and the abscissa and ordinate position x0' of the zero-order diffraction spot in the laser AE direction is obtained by the second focal plane detector 5-2. From the diffraction equation, we know that:

[0073]

[0074] Similarly, the laser AE direction can be calculated:

[0075]

[0076] From (1-1), we can deduce the azimuth angle θ1 and the elevation angle in the AO direction.

[0077]

[0078] From (1-2), we can deduce the azimuth angle θ2 and the elevation angle in the AE direction.

[0079]

[0080] The intersection points α1, β1, γ1 of the laser AO direction with the x, y, and z axes, and the intersection points α2, β2, γ2 of the laser AE direction with the x, y, and z axes, are related as follows:

[0081] cos 2 α+cos 2 β+cos 2 γ = 1

[0082] It can be deduced that:

[0083]

[0084]

[0085] Azimuth angle θ1 and elevation angle in the laser AO direction The intersection points α1, β1, and γ1 of the laser beam along the AO direction with the x, y, and z axes have the following relationships:

[0086]

[0087] Azimuth angle θ1 and elevation angle in the laser AE direction The intersection points α1, β1, and γ1 of the laser beam along the AE direction with the x, y, and z axes have the following relationships:

[0088]

[0089] Substituting α1 and α2 into the equation, we obtain γ1 and γ2:

[0090]

[0091]

[0092] Let the distance between the two light spots be d, the distance from light spot x1 to the z-axis be x, and the depth of the laser from the detector be a. γ1 and γ2 have already been derived. Figure 6 It is obvious

[0093]

[0094] We can deduce x:

[0095]

[0096] Finally, we can obtain AO:

[0097]

[0098] 4. Control and data processing:

[0099] The system drives and controls the first focal plane detector 3-3, and analyzes and calculates the azimuth, elevation, and wavelength parameters of the incoming laser based on the measured data. It also drives and controls the second focal plane detector 5-2, and calculates the azimuth and elevation angles of the laser distance measurement module 5 based on the measured data. Combined with the azimuth and elevation angles measured by the laser wavelength and direction measurement module 3, the laser distance is calculated. Finally, it controls and drives the time measurement unit 4-3. This system provides alarm functions for the incoming laser's wavelength, azimuth, elevation angle, pulse width, and distance.

[0100] The above description only illustrates the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A multi-parameter binocular laser warning device for measuring the distance of an incoming laser target, characterized in that: The application relates to a laser measurement device, which comprises a light shield (1), a receiving window (2), a laser wavelength and direction measurement module (3), a laser pulse width measurement module (4), a laser distance measurement module (5), a control and data processing module (6), the light shield (1) is arranged on the receiving window (2), the laser wavelength and direction measurement module (3), the laser pulse width measurement module (4) and the laser distance measurement module (5) are arranged on the light path direction of the receiving window (2) respectively, and the laser wavelength and direction measurement module (3), the laser pulse width measurement module (4) and the laser distance measurement module (5) are electrically connected to the control and data processing module (6). The laser wavelength and direction measurement module (3) comprises a wide-band grating (3-1), a first optical system (3-2) and a first focal plane detector (3-3), the wide-band grating (3-1) is arranged on the light path direction of the receiving window (2), the first optical system (3-2) is arranged on the light path direction of the wide-band grating (3-1), the first focal plane detector (3-3) is arranged on the light path direction of the first optical system (3-2), and the first focal plane detector (3-3) is electrically connected to the control and data processing module (6). The laser pulse width measurement module (4) comprises a high-speed photoelectric detector (4-1), a pulse shaping circuit (4-2) and a time measurement unit (4-3), the high-speed photoelectric detector (4-1) is arranged on the light path direction of the receiving window (2), the pulse shaping circuit (4-2) is arranged on the light path direction of the high-speed photoelectric detector (4-1), the time measurement unit (4-3) is electrically connected to the pulse shaping circuit (4-2), and the time measurement unit (4-3) is electrically connected to the control and data processing module (6). The laser distance measurement module (5) comprises a second optical system (5-1) and a second focal plane detector (5-2), the second optical system (5-1) is arranged on the light path direction of the receiving window (2), the second focal plane detector (5-2) is arranged on the light path direction of the second optical system (5-1), and the second focal plane detector (5-2) is electrically connected to the control and data processing module (6); the distance of the incoming laser is obtained by calculating the horizontal and vertical coordinates of two 0-level light spots on the first focal plane detector (3-3) and the second focal plane detector (5-2).

2. The warning method of the multi-parameter binocular laser warning device for measuring the distance of the incoming laser target according to claim 1, characterized in that: The application further discloses a laser measurement method, which comprises the following steps: S1, the light shield shields the sunlight, lightning and other light outside the visual field; the wide-band grating is used for light diffraction of the incoming laser; S2, the first optical system and the second optical system filter intense background light noise, meanwhile, the diffraction beams are gathered on the first focal plane detector and the second focal plane detector to form light spots and improve the light spot extraction precision; S3, the high-speed photoelectric detector carries out photoelectric conversion to convert the laser signal into an electric signal; the pulse shaping circuit processes the converted electric signal to meet the input requirement of the time measurement unit; the time measurement unit converts the pulse width measurement into a pulse time interval to measure the value of the pulse time interval. S4, the azimuth and elevation angle of the incoming laser is calculated by the horizontal and vertical coordinates of the 0th order diffraction spot of the first focal plane detector, and the wavelength of the incoming laser is calculated by the distance between the 0th and 1st order diffraction spots of the first focal plane detector; S5, the pulse width of the incoming laser is calculated by the time measurement unit to obtain the time interval between two pulse edges; S6, the distance of the incoming laser is calculated by the horizontal and vertical coordinates of the two 0th order spots on the first and second focal plane detectors; The incoming laser enters the laser distance measurement module, which consists of a second optical system and a second focal plane detector. The azimuth angle of the incoming laser is measured using the abscissa of the 0th-order diffraction spot on the second focal plane detector, and the elevation angle is measured using the ordinate of the 0th-order diffraction spot. The second optical system filters out strong background noise and focuses the beam onto the second focal plane detector to obtain the abscissa and ordinate positions of the laser's 0th-order spot. The second focal plane detector transmits the position information to the control and data processing module, which calculates the direction of the incoming laser. Combining this with the abscissa and ordinate positions of the 0th-order spot measured by the laser wavelength and direction measurement module, the distance to the incoming laser source is calculated. Let the xoy plane be the detector plane, and x0 be the 0th-order spot of the laser illuminating the first focal plane detector. ＇ Let the laser beam illuminating the zero-order spot on the second focal plane detector be denoted as AO, and the laser beam illuminating the second detector as AE. Let α1, β1, and γ1 be the intersection points of the laser AO direction with the x, y, and z axes, respectively, and α2, β2, and γ2 be the intersection points of the laser AE direction with the x, y, and z axes, respectively. Let OE be the distance d between the zero-order spots of the two detectors. AO and AE are the laser distances we are looking for. Since d is much smaller than AO and AE, AO and AE are approximately equal. Let the zero-order spot on the first focal plane detector and its x and y coordinates be x0 (x0, y0), and the zero-order spot on the second focal plane detector and its x and y coordinates be x0 (x0, y0). ＇ (x0) ＇ y0 ＇ Let the azimuth angle of the laser AO direction be θ1 and the elevation angle be φ1; let the azimuth angle of the laser AE direction be θ. ２ The pitch angle is φ ２ Detailed calculations were performed: The transverse and longitudinal coordinate positions x0 of the zero-order diffraction light spot in the laser AO direction are obtained by the first focal plane detector, and the transverse and longitudinal coordinate positions x0 of the zero-order diffraction light spot in the laser AE direction are obtained by the second focal plane detector ＇ According to the diffraction equation, （1-1） The laser AE direction is calculated: （1-2） The azimuth angle θ1 and the elevation angle φ1 of the AO direction are calculated from (1-1) （2-1） From (1-2), the azimuth angle θ of the AE direction is derived ２ , the elevation angle φ ２ （2-2） The intersection points of the laser AO direction and the x, y, z axes α1, β1, γ1 and the intersection points of the laser AE direction and the x, y, z axes α2, β2, γ2 have the following relationship: From this we can deduce: The azimuth angle θ1 and the elevation angle φ1 of the laser AO direction have the following relationship with the intersection points α1, β1, γ1 of the laser and the x, y, z axes in the AO direction: The azimuth angle θ1 and the elevation angle φ1 of the laser AE direction have the following relationship with the intersection points α1, β1, γ1 of the laser and the x, y, z axes in the AE direction: By substituting α1 and α2 into the calculation of γ1 and γ2, we get: The distance between the two spots is d, and the distance from spot x1 to the z-axis is x, the depth of the laser to the detector is a, γ1 and γ2 have been calculated, so we get: From this we can deduce x: Finally, AO is obtained: d is much smaller than AO and AE, so AO and AE are approximately equal.

3. The method of claim 2, wherein the method further comprises: determining the distance of the target laser based on the distance between the two laser beams and the distance between the two cameras. The wavelength and direction measurement method of the incoming laser in S4 is as follows: The incoming laser enters the measurement laser wavelength and direction module, which is composed of a wide-band grating, a first optical system and a first focal plane detector to detect the wavelength, azimuth angle and elevation angle of the incoming laser. The azimuth angle of the incoming laser is measured by the horizontal coordinate of the 0th order diffraction spot of the first focal plane detector, the elevation angle is measured by the vertical coordinate of the 0th order diffraction spot, and the wavelength is measured by the distance between the 0th and 1st order diffraction spots. The wide-band grating diffracts the incoming laser; the first optical system is used to filter out intense background light noise and concentrate the diffracted light beam on the first focal plane detector; the horizontal and vertical coordinates of the 0th and 1st order diffraction spots of the laser are obtained by the first focal plane detector; the first focal plane detector transmits the position information to the control and data processing module; and the direction and wavelength of the incoming laser are calculated on the control and data processing module.

4. The method of claim 2, wherein the method further comprises: determining the distance of the target laser based on the distance between the two laser beams and the distance between the two cameras. The pulse width measurement method of the incoming laser in S5 is as follows: The incoming laser enters the measurement laser pulse width module, which is composed of a high-speed photoelectric detector, a pulse shaping circuit and a time measurement unit to measure the pulse width of the incoming laser. The pulse width is converted by comparing and calculating the time interval between the adjacent rising and falling edges of the pulse signal; The high-speed photoelectric detector converts the incoming laser into an electrical signal, and the pulse shaping circuit amplifies the electrical signal. The differential signal generated after shaping is transmitted to the time measurement unit. The time measurement unit receives the processed electrical signal, converts the pulse width into the time interval between two pulse edges, and calculates the pulse width by comparing the time interval between the adjacent rising and falling edges. The control and data processing module is responsible for generating a driving signal for driving the time measuring unit, controlling the time measuring unit to complete the measurement of the pulse width, and finally completing the measurement of the pulse width of the incoming laser.

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