CN111102942A - Laser emission optical axis and tracking system optical axis parallelism real-time correction system and method - Google Patents
Laser emission optical axis and tracking system optical axis parallelism real-time correction system and method Download PDFInfo
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- CN111102942A CN111102942A CN201911383881.9A CN201911383881A CN111102942A CN 111102942 A CN111102942 A CN 111102942A CN 201911383881 A CN201911383881 A CN 201911383881A CN 111102942 A CN111102942 A CN 111102942A
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- target
- optical axis
- laser
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- beacon light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B11/272—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means
Abstract
The invention relates to a real-time correction system and method for parallelism of a laser emission optical axis and an optical axis of a tracking system, wherein a light path unit comprises: a spectroscope and a laser emission optical axis adjusting unit; the target tracking system images an external target; the laser is emitted out after passing through the beam splitter; the beacon light enters a target tracking system to generate a beacon light spot after passing through a spectroscope; the control system calculates the deviation amount of the optical axes of the laser and the target tracking system according to the target imaging and the position information of the beacon light spot and the calibration origin, and corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit. The beacon light and the target are imaged and separated, meanwhile, the beacon light and the target are imaged in the display system, the deviation amount is determined according to the position of the beacon light, the target and the calibration origin, the parallelism between the laser emission optical axis and the optical axis of the tracking system is corrected in real time through the laser emission optical axis adjusting unit, the influence of the external environment on the laser emission optical axis is reduced, and therefore the accuracy of the target hitting by the laser is improved.
Description
Technical Field
The invention relates to the field of anti-small flyer laser weapons, in particular to a real-time correction system for parallelism of a laser emission optical axis and an optical axis of a tracking system.
Background
In recent years, the news that small flying objects such as unmanned planes and airborne balloons are illegally used is frequently reported, the situations that the unmanned planes attack oil fields, social collective activities, illegally fly into airport flight control areas and the like occur at home and abroad, and at present, the unmanned planes form great threats to the security fields such as social public security, national defense security and the like.
An anti-unmanned aerial vehicle laser weapon is a rapid defense system for striking a target (unmanned aerial vehicle) by high-energy laser. In order to achieve accurate striking of a flying target, it is necessary to ensure high consistency of the laser emission optical axis and the target tracking optical axis. At present, the parallelism correction of a laser optical axis and a target tracking optical axis is mainly aimed at the installation and adjustment process of an optical system, and the real-time correction in the use of the system cannot be realized. Therefore, when the weapon system is influenced by external severe environment during marching, the laser emission optical axis and the target tracking optical axis deviate, and accurate striking on the target cannot be realized.
Disclosure of Invention
The invention provides a real-time correction system and method for parallelism between a laser emission optical axis and an optical axis of a tracking system, aiming at the technical problems in the prior art, and solving the problem that the parallelism between the laser optical axis and a target tracking optical axis cannot be corrected in real time in the prior art.
The technical scheme for solving the technical problems is as follows: a real-time correction system for parallelism of an optical axis of laser emission light and an optical axis of a tracking system comprises: a target tracking system 1, a light path unit and a control system 5;
the optical path unit includes: a spectroscope 3 and a laser emission optical axis adjusting unit;
the target tracking system 1 images an external target; the laser is emitted out after passing through the spectroscope 3; the beacon light enters the target tracking system 1 through the spectroscope 3 to generate a beacon light spot;
the control system 5 calculates the deviation amount of the optical axes of the laser and the target tracking system 1 according to the target imaging and the position information of the beacon light spot and the calibration origin, and corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit.
A correction method based on the parallelism of the laser emission optical axis and the optical axis of a tracking system in real time comprises the following steps:
step 1, tracking the target after finding the target, and enabling the target to be imaged in the target tracking system 1;
and 4, the control system 5 corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit when the deviation exceeds a set threshold.
The invention has the beneficial effects that: the target tracking system is used for imaging and light path control, the beacon light and the target imaging are separated, meanwhile, imaging is carried out on the display system, because the beacon light and the laser share the light path, the deviation amount of the laser and the optical axis of the target tracking system can be determined according to the beacon light, the target imaging and the position of the calibration origin, the parallelism between the laser emission optical axis and the optical axis of the tracking system is corrected in real time through the laser emission optical axis adjusting unit, the influence of the external environment on the laser emission optical axis is reduced, and therefore the accuracy of target hitting by the laser is improved.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the spectroscope 3 is disposed on an optical path where the target enters the target tracking system 1 for imaging, the front surface of the spectroscope 3 faces the target and the laser emission optical axis adjusting unit, and the back surface faces the target tracking system 1.
Further, the light path unit further includes a reflecting prism 2, the reflecting prism 2 is disposed on one side of the reverse side of the spectroscope 3, and the signal beam is transmitted through the front side of the spectroscope 3, reflected by the reflecting prism 2, reflected by the reverse side of the spectroscope 3, and then enters the target tracking system 1.
Further, the front surface of the spectroscope 3 is plated with a high-reflection film aiming at the wavelength of the laser, and is plated with a high-transmission film aiming at the tracking imaging waveband of the target; and the reverse side is plated with a high-reflection film aiming at the wavelength of the beacon light.
Further, the laser emission optical axis adjusting unit includes a fast control mirror 4;
and the rapid control reflector 4 rapidly adjusts the direction of the optical axis of the emergent laser according to the instruction of the control system 5.
Further, the target tracking system 1 includes an imaging sensor;
the imaging band of the imaging sensor is selectively set according to the imaging band of the target and the wavelength of the beacon light.
Further, the control system 5 includes a computer and a display; the computer respectively extracts target imaging information and beacon light imaging information, calculates the deviation amount of the laser and the optical axis of the target tracking system 1 according to the calibration origin information, and controls the laser emission optical axis adjusting unit to correct the optical axis; the display includes a main window displaying imaging information of the target and a small window of the beacon light spot.
The beneficial effect of adopting the further scheme is that: plating a high-reflection film on the front surface of the spectroscope aiming at the wavelength of the laser, plating a high-transmission film on the tracking imaging waveband of the target, so that the laser is reflected and emitted, and the target is transmitted to enter a target tracking system for imaging; plating a high-reflection film on the reverse side according to the wavelength of the beacon light, so that the beacon light is reflected to enter a tracking system; the spectroscope carries out coating and aberration correction design aiming at the wavelength of the laser and the imaging waveband of the target, so that the target can be imaged clearly.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a real-time correction system for parallelism between an optical axis of a laser emitting device and an optical axis of a tracking system according to the present invention;
FIG. 2 is a schematic diagram of separated imaging of beacon light and a target according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a display of a control system according to an embodiment of the present invention;
fig. 4 is a flowchart of an embodiment of a method for correcting parallelism between an optical axis of a laser emitting device and an optical axis of a tracking system in real time according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the system comprises a target tracking system, 2, a reflecting prism, 3, a spectroscope, 4, a reflector, 5 and a control system.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The invention provides a real-time correction system for parallelism of a laser emission optical axis and an optical axis of a tracking system, which comprises: a target tracking system 1, an optical path unit and a control system 5.
The optical path unit includes: a spectroscope 3 and a laser emission optical axis adjusting unit.
The target tracking system 1 images an external target; the laser is emitted out after passing through the spectroscope 3; the beacon light enters the target tracking system 1 after passing through the spectroscope 3 to generate a beacon light spot.
The control system 5 determines the position information of the target imaging and the beacon light spot, calculates the deviation amount of the optical axes of the laser and the target tracking system 1 according to the calibration origin, and corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit.
The real-time correction system for the parallelism of the laser emission optical axis and the optical axis of the tracking system provided by the invention utilizes the target tracking system to carry out imaging and optical path control, separates the beacon light from the target imaging, and simultaneously images on the display system.
Example 1
Fig. 1 is a schematic structural diagram of an embodiment of a real-time correction system for parallelism between a laser emission optical axis and an optical axis of a tracking system according to the present invention, in fig. 1, a thick solid line represents a laser optical path, a thin solid line represents a beacon optical path, and a dotted line represents a target imaging optical path, as can be seen from fig. 1, the system includes: a target tracking system 1, an optical path unit and a control system 5.
The optical path unit includes: a spectroscope 3 and a laser emission optical axis adjusting unit.
Preferably, the spectroscope 3 is disposed on an optical path on which the target enters the target tracking system 1 for imaging, the front surface of the spectroscope 3 faces the target and the laser emission optical axis adjusting unit, and the back surface faces the target tracking system 1.
Preferably, the optical path unit further includes a reflecting prism 2 disposed on one side of the reverse side of the beam splitter 3, and the information beam is transmitted through the front side of the beam splitter 3, reflected by the reflecting prism 2, reflected by the reverse side of the beam splitter 3, and then enters the target tracking system 1.
After passing through the reflecting prism 2, the beacon light enters the target tracking system 1 at a certain angle and is displayed in a staggered manner with the target image, so that the beacon light is reflected to enter the target tracking system 1.
Preferably, the front surface of the spectroscope 3 is plated with a high-reflection film aiming at the wavelength of the laser, and is plated with a high-transmission film aiming at the tracking imaging waveband of the target, so that the laser is emitted after being reflected, and the target is transmitted to the target tracking system 1 for imaging; and the reverse side is plated with a high reflection film aiming at the wavelength of the beacon light, so that the beacon light is reflected to enter the tracking system.
The spectroscope 3 performs coating and aberration correction design for the wavelength of the laser and the imaging waveband of the target, so that the target can be imaged clearly (the wavelength of the beacon light is also within the imaging waveband).
Preferably, the laser emission optical axis adjusting unit includes a fast control mirror 4.
The fast control reflector 4 can fast adjust the direction of the optical axis of the emergent laser according to the instruction of the control system 5, so that the height of the optical axis of the laser is consistent with that of the target tracking optical axis.
The target tracking system 1 images an external target; the laser is emitted out after passing through the spectroscope 3; the beacon light enters the target tracking system 1 after passing through the spectroscope 3 to generate a beacon light spot.
The target tracking system 1 includes an imaging sensor; the imaging band of the imaging sensor is selectively set according to the imaging band of the target and the wavelength of the beacon light. The imaging sensor needs to select a certain resolution and frame frequency.
The control system 5 determines the position information of the target imaging and the beacon light spot, calculates the deviation amount of the optical axes of the laser and the target tracking system 1 according to the calibration origin, and corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit. Fig. 2 is a schematic diagram illustrating separation of beacon light from a target for imaging according to an embodiment of the present invention.
The control system 5 comprises a computer and a display; the computer respectively extracts target imaging information and beacon light imaging information, calculates the optical axis deviation amount according to the calibration origin information, and controls the laser emission optical axis adjusting unit to correct the optical axis; the display comprises a main window for displaying imaging information of a target and a small window for displaying a beacon light spot, and fig. 3 is a display schematic diagram of a display of the control system provided by the embodiment of the invention.
The computer corrects the optical axis by controlling the electronic system of the fast control reflector 4, the small window range is within the correction design constraint of the fast reflection mirror, and when the beacon light deviates from the small window range, the optical axis deviation is too large to be corrected completely.
Example 2
step 1, tracking the target after finding the target, and imaging the target in the target tracking system 1.
After the laser weapon system finds the target, the servo control photoelectric system tracks the target, so that the target is imaged in the tracking system.
And 2, after the target is stably tracked, transmitting beacon light, and enabling the beacon light to be imaged in the target tracking system imaging 1.
And 3, the control system 5 respectively extracts the position information of the target and the beacon light spot by using a target extraction algorithm, and calculates whether the deviation amount of the optical axes of the laser and the target tracking system 1 exceeds a set threshold value according to the origin position information determined during system adjustment.
And 4, the control system 5 corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit when the deviation exceeds a set threshold.
If the deviation of the optical axis is less than a certain set value, the optical axis is considered to be free of error, and high-energy laser is continuously emitted until the target is destroyed; if the optical axis has larger deviation, the control system sends an instruction to the fast-reflection mirror electronic system according to the deviation amount to correct the laser emission optical axis and enable the optical axis to return to the calibration original point; and finally, continuously emitting the high-energy laser until the target is destroyed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A real-time correction system for parallelism of an optical axis of a laser emitting light and an optical axis of a tracking system, the system comprising: the system comprises a target tracking system (1), a light path unit and a control system (5);
the optical path unit includes: a spectroscope (3) and a laser emission optical axis adjusting unit;
the target tracking system (1) images an external target; the laser is emitted out after passing through the spectroscope (3); the beacon light enters the target tracking system (1) to generate a beacon light spot after passing through the spectroscope (3);
the control system (5) determines the position information of the target imaging and the beacon light spot, calculates the deviation amount of the optical axes of the laser and the target tracking system (1) according to the calibration origin, and corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit.
2. The system according to claim 1, wherein the beam splitter (3) is disposed on an optical path of the target entering the target tracking system (1) for imaging, a front side of the beam splitter (3) facing the target and the laser emission optical axis adjusting unit is disposed, and a back side is disposed facing the target tracking system (1).
3. The system according to claim 2, wherein the optical path unit further comprises a reflecting prism (2), the reflecting prism (2) is arranged on one side of the reverse side of the spectroscope (3), and the signal beam is transmitted through the front side of the spectroscope (3), reflected by the reflecting prism (2), reflected by the reverse side of the spectroscope (3) and then enters the target tracking system (1).
4. The system according to claim 3, characterized in that the spectroscope (3) is coated with a high reflection film for the wavelength of the laser light and a high transmission film for the tracking imaging band of the target; and the reverse side is plated with a high-reflection film aiming at the wavelength of the beacon light.
5. The system according to claim 1, characterized in that the laser emission light axis adjustment unit comprises a fast control mirror (4);
and the rapid control reflector (4) rapidly adjusts the direction of the optical axis of the emergent laser according to the instruction of the control system (5).
6. The system according to claim 1, characterized in that the target tracking system (1) comprises an imaging sensor;
the imaging band of the imaging sensor is selectively set according to the imaging band of the target and the wavelength of the beacon light.
7. The system according to claim 1, characterized in that the control system (5) comprises a computer and a display;
the computer respectively extracts target imaging information and beacon light imaging information, calculates deviation amount of the laser and the optical axis of the target tracking system (1) according to the calibration origin information, and controls a laser emission optical axis adjusting unit to correct the optical axis;
the display includes a main window displaying imaging information of the target and a small window of the beacon light spot.
8. A method for correcting the parallelism of the optical axis of the laser emitting light and the optical axis of the tracking system in real time based on any one of claims 1 to 7, wherein the method comprises the following steps:
step 1, tracking the target after finding the target, and imaging the target in the target tracking system (1);
step 2, after stably tracking the target, emitting the beacon light to enable the beacon light to be imaged in the target tracking system (1);
step 3, the control system (5) respectively extracts the position information of the target and the beacon light spot by using a target extraction algorithm, and calculates whether the deviation amount of the laser and the optical axis of the target tracking system (1) exceeds a set threshold value according to the origin position information calibrated during the system adjustment;
and 4, the control system (5) corrects the direction of the optical axis of the laser in real time through the laser emission optical axis adjusting unit when the deviation exceeds a set threshold.
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| CN114967117A (en) * | 2022-04-14 | 2022-08-30 | 中国电子科技集团公司第十一研究所 | Active and passive double-light composite system optical axis alignment method and system |
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