A laboratory test method for optoelectronic search and ranging systems

Abstract

The present specification provides a photoelectric search ranging system laboratory test method, and relates to the technical field of laser ranging. In the system, when the optical axis of the flyback cryogenic infrared thermal imager coincides with the parallel light after passing through the large-diameter concave mirror, the target is detected, and a delay laser shooting process is started according to the target position; the laser emission delay time parameter and the laser swing mirror swing amount are set; according to the laser emission delay time and the laser swing mirror swing amount, the laser ranging machine emits a laser beam, the laser beam is reflected by the large-diameter concave mirror and irradiates on the target and the circular hole of the laser photo paper, forming a laser mark; if the laser mark deviates from the circular hole, the parameter is adjusted according to the error amount of the deviation from the circular hole. The problem that the current photoelectric search ranging system outdoor test efficiency is low and the error cannot be quantitatively tested is solved. The system quantitatively determines the laser irradiation error, and corrects it in real time, improves the debugging efficiency, and ensures that the laser can hit the target every time.

Description

Technical Field

[0001] This document relates to the field of laser ranging technology, and in particular to a laboratory testing method for an optoelectronic search and ranging system. Background Technology

[0002] In an optoelectronic search and ranging system for three-dimensional multi-target detection under high-speed rotation, a laser rangefinder and a back-scan cooled infrared thermal imager are mounted on a servo turntable rotating at 360° / s. The laser optical axis and the infrared optical axis are installed with a 12.6° difference. After the infrared thermal imager detects a target, it calculates the angle the turntable needs to rotate to align with the target, as well as the angle the pitch axis needs to be raised, based on the target's position in the image. When the laser optical axis reaches the target, it immediately controls the laser rangefinder to perform distance measurement. However, if real outdoor targets are used for testing, the following problems exist:

[0003] First, it cannot be guaranteed that the laser will hit the target precisely every time.

[0004] Secondly, if the laser fails to reach the target, determining the deviation is extremely difficult.

[0005] These difficulties result in low efficiency for outdoor testing and make it impossible to quantitatively test errors.

[0006] Therefore, there is an urgent need for a testing scheme for photoelectric search and ranging systems to solve the problems of low outdoor testing efficiency and inability to quantitatively test errors in current photoelectric search and ranging systems. Summary of the Invention

[0007] This specification provides a laboratory testing method for an electro-optical search and ranging system, which addresses the problems of low outdoor testing efficiency and inability to quantitatively test errors in current electro-optical search and ranging systems.

[0008] Firstly, this specification provides a laboratory testing system for an optoelectronic search and ranging system, including: an optoelectronic search and ranging system, a large-diameter concave mirror, a target and laser photographic paper, and an infrared light source;

[0009] The photoelectric search and ranging system includes a back-scan cooled infrared thermal imager, a laser rangefinder, a servo control assembly, and a parameter adjustment module. The back-scan cooled infrared thermal imager and the laser rangefinder are mounted on the servo control assembly. The optical axis of the laser rangefinder is at an angle α to the optical axis of the back-scan cooled infrared thermal imager. The pitch position of the servo control assembly remains unchanged, while the azimuth rotates at a high speed at a specified speed.

[0010] The target and laser photographic paper are placed at the focal point of a large-diameter concave mirror, and a circular hole is provided in the center of the target and laser photographic paper; the infrared light emitted by the infrared light source passes through the circular hole and is converted into parallel light by the large-diameter concave mirror; when the laser beam emitted by the laser rangefinder is focused by the large-diameter concave mirror, it illuminates the target and laser photographic paper.

[0011] The infrared light source is used to radiate infrared light, wherein the infrared light passes through the circular hole and then illuminates the large-diameter concave mirror, and is converted into parallel light by the large-diameter concave mirror.

[0012] The servo system is used to drive the back-scan thermal imager and the laser rangefinder to rotate at high speed;

[0013] The backflip-cooled infrared thermal imager is used to detect targets based on the overlap between its own optical axis and the parallel beam reflected by a large-diameter concave mirror, and to initiate a delayed laser emission program based on the target position.

[0014] The laser rangefinder is used to emit a laser beam according to a preset laser emission delay time and laser mirror swing amount, wherein the laser beam is focused onto the target surface and laser photographic paper by a large-diameter concave mirror to form a laser mark.

[0015] The parameter adjustment module is used to adjust the laser emission delay time parameter and the laser mirror swing amount according to the error amount of the deviation from the circular hole if the laser imprint deviates from the circular hole, so as to ensure that the laser imprint coincides with the circular hole.

[0016] Secondly, this specification provides a laboratory test method for an electro-optical search and ranging system, including:

[0017] When the photoelectric search and ranging system is powered on, after the retrace-cooled infrared thermal imager is cooled to the required temperature, the servo system drives the retrace-cooled thermal imager and laser rangefinder to rotate at high speed, and collect infrared images at specified time intervals to perform target detection on the images;

[0018] When the optical axis of the back-scan cooled infrared thermal imager coincides with the parallel light after passing through the large-diameter concave mirror, the target is detected, and the delayed laser firing process is initiated according to the target position.

[0019] According to the preset laser emission delay time and the laser mirror swing amount, the laser rangefinder emits a laser beam, which is reflected by a large-diameter concave mirror and converged onto the target and laser photographic paper to form a laser mark.

[0020] If the laser imprint deviates from the circular hole, the parameter adjustment module adjusts the parameters according to the error amount of the deviation from the circular hole to ensure that the laser imprint coincides with the circular hole.

[0021] The beneficial effects of this invention are as follows:

[0022] This manual provides a laboratory testing method for an optoelectronic search and ranging system. In this system, when the optical axis of the back-scan cooled infrared thermal imager coincides with the parallel light after passing through a large-diameter concave mirror, a target is detected, and a delayed laser emission process is initiated based on the target's position. The laser emission delay time parameters and the laser mirror swing amount are set. Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder emits a laser beam, which is reflected by the large-diameter concave mirror and illuminates the target and the circular hole in the laser photographic paper, forming a laser mark. If the laser mark deviates from the circular hole, the parameters are adjusted according to the error amount to ensure that the laser mark coincides with the circular hole. The infrared light source of this system forms a point light source through the circular hole on the target plate, which is then converted into parallel light by the large-diameter concave mirror and enters the back-scan cooled infrared thermal imager, simulating an infinitely distant target in the laboratory and solving the target distance problem. When the laser beam is perpendicular to the concave mirror, the emitted laser beam is reflected by the large-diameter concave mirror onto the laser photographic paper, leaving a laser imprint. The accuracy of the laser ranging beam's alignment with the target can be clearly observed by the relative position of the laser imprint and the pinhole. This system quantitatively determines the laser irradiation error and corrects it in real time, improving debugging efficiency and ensuring that the laser hits the target every time. The measuring device is simple and its accuracy is visible. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of a laboratory test system for an optoelectronic search and ranging system provided in the embodiments of this specification;

[0025] Figure 2 This is a schematic diagram of a laser imaging method provided in the embodiments of this specification;

[0026] Figure 3 This is a schematic diagram of a laboratory test method for an optoelectronic search and ranging system provided in the embodiments of this specification.

[0027] Figure labels: 1. Electro-optical search and ranging system; 2. Large-diameter concave mirror; 3. Target and laser photographic paper.

[0028] 4. Infrared light source 5. Re-scanning cooled infrared thermal imager 6. Laser rangefinder 7. Servo control combination. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments in this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this document.

[0030] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings. Specific Implementation Example 1:

[0032] This embodiment provides a laboratory testing system for an optoelectronic search and ranging system. (See also...) Figure 1 It includes: 1. photoelectric search and ranging system, 2. large-diameter concave mirror, 3. target and laser photographic paper, and 4. infrared light source;

[0033] The photoelectric search and ranging system 1 includes a back-scan cooled infrared thermal imager 5, a laser rangefinder 6, a servo control assembly 7, and a parameter adjustment module. The back-scan cooled infrared thermal imager 5 and the laser rangefinder 6 are mounted on the servo control assembly 7. The optical axis of the laser rangefinder 6 is at an angle α to the optical axis of the back-scan cooled infrared thermal imager 5. The pitch position of the servo control assembly 7 remains unchanged, while the azimuth rotates at a high speed v.

[0034] The angle α is determined by the internal structure of the photoelectric search and ranging system 1, and the specified speed v is determined based on the performance of the photoelectric search and ranging system 1.

[0035] Furthermore, the optical path of the system provided in this embodiment is specifically as follows:

[0036] The target and laser photographic paper 3 are placed at the focal point of the large-diameter concave mirror 2, and a circular hole is provided in the center of the target and laser photographic paper 3; the infrared light emitted by the infrared light source 4 passes through the circular hole and is converted into parallel light by the large-diameter concave mirror 2; when the laser beam emitted by the laser rangefinder 6 is focused by the large-diameter concave mirror 2, it illuminates the target and laser photographic paper 3.

[0037] The functions of each component are explained below:

[0038] The infrared light source 4 is used to radiate infrared light, which passes through a circular hole and then illuminates a large-diameter concave mirror 2, and is converted into parallel light by the large-diameter concave mirror 2; based on this, an infinitely distant target is simulated in the laboratory, solving the target distance problem.

[0039] The servo system 7 is used to drive the back-scan thermal imager 5 and the laser rangefinder 6 to rotate at high speed;

[0040] The back-scan cooled infrared thermal imager 5 is used to detect the target based on the overlap between its own optical axis and the parallel beam reflected by the large-diameter concave mirror 2, and to start a delayed laser emission program based on the target position.

[0041] The laser rangefinder 6 is used to emit a laser beam according to the preset laser emission delay time and the laser mirror swing amount. The laser beam is focused onto the target surface and the laser photographic paper 3 by the large-diameter concave mirror 2 to form a laser mark.

[0042] The parameter adjustment module is used to adjust the laser emission delay time parameter and the laser mirror swing amount according to the error amount of the deviation from the circular hole if the laser imprint deviates from the circular hole, so as to ensure that the laser imprint coincides with the circular hole.

[0043] Furthermore, the functions of each component will be explained in detail below:

[0044] The diameter of the large-diameter concave mirror 2 is determined by the structure of the back-scanning cooled infrared thermal imager 5 and the laser rangefinder 6, so as to ensure that the back-scanning cooled infrared thermal imager 5 can smoothly receive the laser reflected by the large-diameter concave mirror 2, and the large-diameter concave mirror 2 can smoothly receive the laser emitted by the laser rangefinder 6.

[0045] Specifically, in this embodiment, the diameter of the large-diameter concave mirror 2 is not less than 1 meter.

[0046] Furthermore, the scan-back cooled infrared thermal imager 5 is specifically used for:

[0047] When the optical axis of the back-scanning cooled infrared thermal imager 5 coincides with the parallel light after passing through the large-diameter concave mirror 2, the target is detected, and the delayed laser firing process is initiated according to the target position.

[0048] When the preset laser emission delay time is reached, the optical axis of the laser rangefinder 6 coincides exactly with the parallel light reflected by the large-diameter concave mirror 2.

[0049] The laser emission delay is determined by the internal software of the photoelectric search and ranging system 1.

[0050] Furthermore, since the photoelectric search and ranging system operates at high speed, in order to perform real-time calibration when deviations occur, this embodiment provides a technical solution for real-time adjustment using a parameter adjustment module in the internal software and a laser rangefinder, specifically:

[0051] The parameter adjustment module adjusts the laser emission delay time parameter and the laser mirror swing amount by measuring the deviation direction and distance between the laser imprint and the circular hole.

[0052] The laser rangefinder 6 emits a laser beam based on the adjusted laser emission delay time parameters and the laser mirror swing amount, so that the laser mark is projected onto the circular hole.

[0053] Furthermore, if the laser imprint coincides with the circular hole, it indicates that the laser irradiation target position is not deviated, and the back-scan cooled infrared thermal imager does not need to be adjusted.

[0054] After the system has completed testing, it is put into direct use in field trials.

[0055] In summary, in this embodiment, when the optical axis of the back-scan cooled infrared thermal imager coincides with the parallel light after passing through the large-diameter concave mirror, the target is detected, and a delayed laser firing process is initiated based on the target position. The laser emission delay time parameter and the laser mirror swing amount are set. Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder emits a laser beam, which is reflected by the large-diameter concave mirror and illuminates the target and the circular hole in the laser photographic paper, forming a laser mark. If the laser mark deviates from the circular hole, the parameters are adjusted according to the error amount to ensure that the laser mark coincides with the circular hole. The infrared light source forms a point light source through the circular hole on the target plate, and is then converted into parallel light by the large-diameter concave mirror before entering the back-scan cooled infrared thermal imager. This simulates an infinitely distant target in the laboratory, solving the target distance problem. When the laser beam is perpendicular to the concave mirror, the emitted laser beam is reflected by the large-diameter concave mirror onto the laser photographic paper, leaving a laser imprint. The accuracy of the laser ranging beam's alignment with the target can be clearly observed by the relative position of the laser imprint and the pinhole. This system quantitatively determines the laser irradiation error and corrects it in real time, improving debugging efficiency and ensuring that the laser hits the target every time. The measuring device is simple and its accuracy is visible. Specific Implementation Example 2:

[0057] This embodiment provides a laboratory testing method for an optoelectronic search and ranging system. (See also...) Figure 3 ,include:

[0058] Step 302: The photoelectric search and ranging system 1 is powered on. After the retrace cooling infrared thermal imager 5 is cooled down, the servo system 7 drives the retrace thermal imager 5 and the laser rangefinder 6 to rotate at high speed, and collect infrared images at specified time intervals to perform target detection on the images.

[0059] Step 304: When the optical axis of the back-scanning cooled infrared thermal imager 5 coincides with the parallel light after passing through the large-diameter concave mirror 2, the target is detected, and the delayed laser firing process is started according to the target position.

[0060] Step 306: Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder 6 emits a laser beam, wherein the laser beam is reflected by the large-diameter concave mirror 2 and irradiates the target and the circular hole of the laser photographic paper 3 to form a laser mark.

[0061] It should be noted that after the back-scanning cooled infrared thermal imager 5 starts the delayed laser firing process, when the preset laser emission delay time is reached, the optical axis of the laser rangefinder 6 coincides with the parallel light reflected by the large-diameter concave mirror 2. This is the time for the laser rangefinder 6 to emit a laser beam.

[0062] The laser emission delay time and the laser mirror swing amount are preset. When the laser mark deviates from the circular hole, the internal parameter adjustment module will adjust and update the laser emission delay time and the laser mirror swing amount to play the role of adjustment and calibration.

[0063] Step 308: If the laser imprint deviates from the circular hole, the parameter adjustment module adjusts the parameters according to the error amount of the deviation from the circular hole to ensure that the laser imprint coincides with the circular hole.

[0064] Specifically, one possible implementation of step 308 is as follows:

[0065] S81, parameter adjustment module, adjusts the laser emission delay time parameter and the laser mirror swing amount by measuring the deviation direction and distance between the laser imprint and the circular hole;

[0066] S82. Based on the adjusted laser emission delay time parameters and the laser mirror swing amount, the laser rangefinder emits a laser beam, causing the laser mark to be projected onto the circular hole.

[0067] Furthermore, after performing step 308, the method further includes:

[0068] If the laser mark coincides with the pinhole, it indicates that the laser irradiation target position is not deviated. After the test is completed, the system can be directly used in field experiments.

[0069] In summary, in this embodiment, when the optical axis of the back-scan cooled infrared thermal imager coincides with the parallel light after passing through the large-diameter concave mirror, the target is detected, and a delayed laser firing process is initiated based on the target position. The laser emission delay time parameter and the laser mirror swing amount are set. Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder emits a laser beam, which is reflected by the large-diameter concave mirror and illuminates the target and the circular hole in the laser photographic paper, forming a laser mark. If the laser mark deviates from the circular hole, the parameters are adjusted according to the error amount to ensure that the laser mark coincides with the circular hole. The infrared light source forms a point light source through the circular hole on the target plate, and is then converted into parallel light by the large-diameter concave mirror before entering the back-scan cooled infrared thermal imager. This simulates an infinitely distant target in the laboratory, solving the target distance problem. When the laser beam is perpendicular to the concave mirror, the emitted laser beam is reflected by the large-diameter concave mirror onto the laser photographic paper, leaving a laser imprint. The accuracy of the laser ranging beam's alignment with the target can be clearly observed by the relative position of the laser imprint and the pinhole. This system quantitatively determines the laser irradiation error and corrects it in real time, improving debugging efficiency and ensuring that the laser hits the target every time. The measuring device is simple and its accuracy is visible. Specific Implementation Example 3:

[0071] This embodiment provides a laboratory testing system and method for an optoelectronic search and ranging system. (See also...) Figure 1 The system includes: 1. photoelectric search and ranging system, 2. 1-meter diameter concave mirror, 3. target and laser photographic paper, and 4. infrared light source.

[0072] Among them, the photoelectric search and ranging system 1 consists of a back-scan cooled infrared thermal imager 5, a laser rangefinder 6 and a servo control assembly 7. The back-scan cooled infrared thermal imager 5 and the laser rangefinder 6 are mounted on the servo control assembly 7. The optical axis of the laser rangefinder 6 is 12.6° different from the optical axis of the back-scan cooled infrared thermal imager 5. The pitch position of the servo control assembly 7 remains unchanged, and the azimuth rotates at a high speed of 1 revolution / second.

[0073] The target and laser photographic paper 3 are placed at the focal point of a 1-meter diameter concave mirror 2. A small hole is located in the center of the target and laser photographic paper 3. Infrared light emitted by the infrared light source 4 passes through the small hole and illuminates the 1-meter diameter concave mirror 2, where it is converted into parallel light (see [reference]). Figure 1 (The red line in the middle).

[0074] When the photoelectric search and ranging system 1 is powered on and the retrace infrared thermal imager 5 is cooled down, the servo system 7, along with the retrace thermal imager 5 and the laser rangefinder 6, begins to rotate at high speed, acquiring an infrared image every 10ms, and then performing target detection on the image.

[0075] When the optical axis of the back-scanning infrared thermal imager 5 coincides with the parallel light after passing through the 1-meter diameter concave mirror 2, the target is detected, and the delayed laser firing process is initiated based on the target's position. Approximately 35ms later, the optical axis of the laser rangefinder 6 coincides exactly with the parallel light after passing through the concave mirror 2 (which has a diameter greater than 1 meter), at which point the laser is emitted, and the laser beam (see...) Figure 1 The blue line is reflected by the 1-meter diameter concave mirror 2 and shines onto the target and the small hole of the laser photographic paper 3, forming a black mark.

[0076] When the black mark coincides with the small hole, it indicates that the laser irradiation target position is not deviated. When the black mark is not on the small hole, the parameters can be adjusted according to the error amount of the deviation from the small hole to ensure that the black mark coincides with the small hole.

[0077] The first problem encountered in laboratory testing was that the target distance was not far enough. The photoelectric search and ranging system requires a target distance of more than 15km, and it is impossible to place such a distant target indoors.

[0078] It should be noted that this embodiment uses a concave mirror with a diameter of 1 meter to place the target and laser photographic paper at the focal point of the concave mirror. The infrared light source forms a point light source through a small hole on the target. The infrared light from the point light source is converted into parallel light after passing through the concave mirror, thus simulating a target at an infinite distance in the laboratory and solving the target distance problem.

[0079] This embodiment utilizes common laser photographic paper, which is a special material that can sense laser light. When a laser beam shines on the photographic paper, a black mark will appear on the illuminated area. Figure 1 The blue lines in the image represent the optical path of the laser beam. The laser light is focused onto the laser photographic paper on the target surface by a concave mirror, forming a laser imprint, such as... Figure 2 As shown. By measuring the deviation direction and distance between the laser imprint and the pinhole, the laser emission delay time parameter and the laser mirror swing amount can be quantitatively adjusted, thereby enabling the laser imprint to be applied more accurately to the pinhole.

[0080] Furthermore, this embodiment proposes a laboratory testing method for an optoelectronic search and ranging system, which includes: an infrared light source passing through a small hole on a target plate to form a point light source, which is then converted into parallel light by a one-meter diameter concave mirror and enters a back-scanning infrared thermal imager to simulate an infinitely distant target in the laboratory, thus solving the target distance problem. When the laser optical axis is perpendicular to the concave mirror, the emitted beam is reflected by the concave mirror onto laser photographic paper, leaving a laser imprint. By observing the relative position of the laser imprint and the small hole, the accuracy of the laser ranging beam aligned with the target can be clearly observed.

[0081] This embodiment presents a laboratory testing method for an optoelectronic search and ranging system. This method is used in systems that employ infrared and laser to perform three-dimensional target measurement under high-speed rotation. It features simple measuring devices and visual and measurable accuracy.

[0082] In summary, in this embodiment, when the optical axis of the back-scan cooled infrared thermal imager coincides with the parallel light after passing through the large-diameter concave mirror, the target is detected, and a delayed laser firing process is initiated based on the target position. The laser emission delay time parameter and the laser mirror swing amount are set. Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder emits a laser beam, which is reflected by the large-diameter concave mirror and illuminates the target and the circular hole on the laser photographic paper, forming a laser mark. If the laser mark deviates from the circular hole, the parameters are adjusted according to the error amount to ensure that the laser mark coincides with the circular hole. The infrared light source of this system forms a point light source through the circular hole on the target plate, which is then converted into parallel light by the large-diameter concave mirror and enters the back-scan cooled infrared thermal imager. This simulates an infinitely distant target in the laboratory, solving the target distance problem. When the laser beam is perpendicular to the concave mirror, the emitted laser beam is reflected by the large-diameter concave mirror onto the laser photographic paper, leaving a laser imprint. The accuracy of the laser ranging beam's alignment with the target can be clearly observed by the relative position of the laser imprint and the pinhole. This system quantitatively determines the laser irradiation error and corrects it in real time, improving debugging efficiency and ensuring that the laser hits the target every time. The measuring device is simple and its accuracy is visible.

[0083] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A laboratory testing system for an optoelectronic search and ranging system, characterized in that, include: Photoelectric search and ranging system (1), large-diameter concave mirror (2), target and laser photographic paper (3), infrared light source (4); The photoelectric search and ranging system (1) includes a back-scan cooled infrared thermal imager (5), a laser rangefinder (6), a servo control assembly (7), and a parameter adjustment module. The back-scan cooled infrared thermal imager (5) and the laser rangefinder (6) are mounted on the servo control assembly (7). The optical axis of the laser rangefinder (6) is at an angle α to the optical axis of the back-scan cooled infrared thermal imager (5). The pitch position of the servo control assembly (7) remains unchanged, and the azimuth rotates at a specified speed. The target and laser photographic paper (3) are placed at the focal point of the large-diameter concave mirror (2), and a circular hole is provided in the center of the target and laser photographic paper (3); the infrared light emitted by the infrared light source (4) passes through the circular hole and is converted into parallel light by the large-diameter concave mirror (2); when the laser beam emitted by the laser rangefinder (6) is focused by the large-diameter concave mirror (2), it illuminates the target and laser photographic paper (3); The infrared light source (4) is used to radiate infrared light, wherein the infrared light passes through the circular hole and then shines on the large-diameter concave mirror (2), and is converted into parallel light by the large-diameter concave mirror (2); The servo control assembly (7) is used to drive the retrace-cooled infrared thermal imager (5) and the laser rangefinder (6) to rotate at high speed; The back-scanning cooled infrared thermal imager (5) is used to detect the target based on the overlap between its own optical axis and the parallel beam reflected by the large-diameter concave mirror (2), and to start a delayed laser emission program based on the target position. The laser rangefinder (6) is used to emit a laser beam based on the laser emission delay time and the laser mirror swing amount, wherein the laser beam is focused onto the target surface and the laser photographic paper (3) by a large-diameter concave mirror (2) to form a laser mark; The parameter adjustment module is used to adjust the laser emission delay time parameter and the laser mirror swing amount according to the error amount of the deviation from the circular hole if the laser imprint deviates from the circular hole, so as to ensure that the laser imprint coincides with the circular hole. The diameter of the large-diameter concave mirror (2) is not less than 1 meter; The scan-back cooled infrared thermal imager (5) is specifically used for: When the optical axis of the back-scan cooled infrared thermal imager (5) coincides with the parallel light after passing through the large-diameter concave mirror (2), the target is detected and the delayed laser firing process is started according to the target position; When the preset laser emission delay time is reached, the optical axis of the laser rangefinder (6) coincides exactly with the parallel light reflected by the large-diameter concave mirror (2); The parameter adjustment module is specifically used for: By measuring the deviation direction and distance between the laser imprint and the circular hole, the laser emission delay time parameter and the laser mirror swing amount are adjusted. The laser rangefinder (6) is also specifically used for: Based on the adjusted laser emission delay time parameters and the laser mirror swing amount, a laser beam is emitted so that the laser mark is projected onto the circular hole.

2. The system according to claim 1, characterized in that, If the laser mark coincides with the circular hole, it indicates that the laser irradiation target position is not deviated and no adjustment is required.

3. A laboratory testing method for an electro-optical search and ranging system, applied to the system described in any one of claims 1 to 2, characterized in that, include: When the photoelectric search and ranging system (1) is powered on, after the retrace-cooled infrared thermal imager (5) is cooled in place, the servo control combination (7) drives the retrace-cooled infrared thermal imager (5) and the laser rangefinder (6) to rotate at high speed, collect infrared images at specified time intervals, and perform target detection on the images; When the optical axis of the back-scan cooled infrared thermal imager (5) coincides with the parallel light after passing through the large-diameter concave mirror (2), the target is detected and the delayed laser firing process is started according to the target position; Based on the laser emission delay time and the laser mirror swing amount, the laser rangefinder (6) emits a laser beam, which is then focused onto the target and laser photographic paper (3) by a large-diameter concave mirror (2) to form a laser mark; If the laser imprint deviates from the circular hole, the parameter adjustment module adjusts the parameters according to the error amount of the deviation from the circular hole to ensure that the laser imprint coincides with the circular hole; Infrared light source forms a point light source after passing through a small hole on the target plate. Then it is converted into parallel light by a large-diameter concave mirror and enters the back-scan infrared thermal imager to simulate a target at infinity. If the laser imprint deviates from the circular hole, the parameter adjustment module adjusts the parameters according to the error amount of the deviation from the circular hole to ensure that the laser imprint coincides with the circular hole, including: The parameter adjustment module adjusts the laser emission delay time parameter and the laser mirror swing amount by measuring the deviation direction and distance between the laser imprint and the circular hole. The laser rangefinder (6) emits a laser beam according to the adjusted laser emission delay time parameters and the laser mirror swing amount, so that the laser mark is hit on the round hole; When the preset laser emission delay time is reached, the optical axis of the laser rangefinder (6) coincides exactly with the parallel light reflected by the large-diameter concave mirror (2).

4. The method according to claim 3, characterized in that, If the laser mark coincides with the pinhole, it indicates that the laser has irradiated the area. The target position is not deviated.

Images