CN112072452A - Target light beam synthesis pointing detection control device and method based on time sequence detection - Google Patents
Target light beam synthesis pointing detection control device and method based on time sequence detection Download PDFInfo
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
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Abstract
The invention discloses a target on-target beam synthesis pointing detection control device and method based on time sequence detection, which comprises a first pulse indication laser, a first sub-laser, a first beam combining mirror, a first adjustable reflector, a first optical axis detection device, a second pulse indication laser, a second sub-laser, a second beam combining mirror, a second adjustable reflector, a second optical axis detection device, a laser action target, a target indication pulse laser, a target monitoring camera, a signal generator, a processing system and the like; the invention solves the problem of inconsistent positions of all sub-beam light spots in the beam combining system on the target and improves the energy concentration ratio of the light beam on the target.
Description
Technical Field
The invention relates to the technical field of light beam control, in particular to a target light beam synthesis pointing detection control device and method based on time sequence detection.
Background
There is a physical limitation on the output power of a single laser, and in order to obtain higher output power, a mode of combining multiple lasers is generally adopted. Beam combining can be divided into two categories, pre-emission combining and target combining, in a manner compatible with laser emission systems. In the pre-emission combination mode, the combination of sub-beams is firstly completed through a coherent or non-coherent combination method, and then the combined beam is regarded as a single beam and emitted to a target by an emission system. This approach requires that each laser be integrated on the same mobile or fixed platform, thus placing strict requirements on the size, weight and power consumption of the sub-lasers and limiting the power of the synthesized laser beam. In the target-combining mode, each sub-beam is emitted by a respective emission system, and each sub-beam is irradiated to the same position of the target by adjusting the direction of each emission system. Compared with the synthesis mode before emission, the synthesis mode on the target does not need to integrate each sub-laser and the emission system thereof on the same mobile or fixed platform, greatly relaxes the requirements on the size, weight and power consumption of the sub-lasers, can obviously improve the power of the synthesized laser beam, and has good development prospect.
The core problem to be solved for realizing the target synthesis is how to ensure that each sub-beam is incident on the same position on the target. Because the output light beam wavelengths of the sub-lasers are usually consistent, the pointing directions of the sub-lasers are difficult to distinguish by detecting the spot positions on the target, and then the sub-lasers are controlled to realize the superposition of the spot positions on the target. At present, no report on a control device or method for realizing target synthesis by distinguishing the spot positions of the sub-beams on the target and controlling the sub-beams to point is available.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a target light beam synthesis pointing detection control device and method based on time sequence detection, solves the problem of inconsistent positions of sub-light beam spots in a target light beam synthesis system, and improves the light beam energy concentration on a target.
The purpose of the invention is realized by the following scheme:
an on-target beam combining pointing detection control apparatus based on time-series detection, comprising: the device comprises a first pulse indication laser, a first sub laser, a first beam combiner, a first adjustable reflector, a first optical axis detection device, a second pulse indication laser, a second sub laser, a second beam combiner, a second adjustable reflector, a second optical axis detection device, a laser action target, a target indication pulse laser, a target monitoring camera, a signal generator and a processing system; the first pulse indication laser, the second pulse indication laser, the target monitoring camera and the processing system are respectively and electrically connected with the signal generator; the signal generator outputs trigger signals to the first pulse indication laser, the second pulse indication laser, the target monitoring camera and the processing system; the processing system receives the image signal output by the target monitoring camera, judges the currently-emitted pulse indication laser according to the output signal of the signal generator, and controls the deflection of the adjustable reflector corresponding to the indication laser, so that the target monitoring camera detects that the spot position of the output beam of the pulse indication laser on the laser action target is consistent with the spot position of the output beam of the target indication laser.
Further, the first adjustable mirror comprises a tilting mirror driven by any one of a piezoelectric ceramic driver, an electrostrictive material driver and a voice coil motor driver, or a plane mirror mounted on a motorized mirror holder.
Further, the second adjustable mirror comprises a tilting mirror driven by any one of a piezoelectric ceramic driver, an electrostrictive material driver and a voice coil motor driver, or a plane mirror mounted on a motorized mirror holder.
Further, the first optical axis detection device is composed of a convex lens and a camera arranged on the focal plane of the convex lens; the second optical axis detection device is composed of a convex lens and a camera arranged on the focal plane of the convex lens.
Further, the wavelengths of the first pulse indication laser, the second pulse indication laser and the target indication pulse laser are the same; the first sub laser and the second sub laser have the same wavelength, and the first sub laser, the first pulse indication laser, the second pulse indication laser and the target indication pulse laser have different wavelengths.
Furthermore, a notch filter is additionally arranged on the target monitoring camera, and the central wavelength of the notch filter is the same as the wavelengths of the first sub-laser and the second sub-laser.
Further, the processing system includes any one of a computer, an application specific integrated circuit board.
A processing system judges a pulse sub-laser of the currently output laser according to a received trigger signal, controls an adjustable reflector corresponding to the pulse sub-laser to act, and enables a target monitoring camera to detect that the spot position of a first pulse indication laser or a second pulse indication laser on a laser action target coincides with the spot position of the target indication laser.
Further, when the signal generator sends out a 3k +1 th pulse signal, the target indication pulse laser outputs a laser pulse; when the signal generator sends out a 3k +2 pulse signal, the first pulse indicates the laser to output laser pulses; when the signal generator sends out a 3k +3 pulse signal, the second pulse indicates the laser to output laser pulses; wherein k is 1, 2, 3 ….
Further, the specific implementation steps are as follows:
and 7, repeatedly executing the step 4, the step 5 and the step 6.
The invention has the beneficial effects that:
the invention solves the problem of inconsistent positions of all sub-beam light spots in the beam combining system on the target and improves the energy concentration ratio of the light beam on the target.
Drawings
In order 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 described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a timing diagram illustrating the operation of the device for beam combining and pointing detection control on two sub-laser targets according to the present invention;
in the figure, 1-the first pulse indicates the laser; 2-a first sub-laser; 3-a first beam combiner; 4-a first adjustable mirror; 5-first optical axis detection means; 6-a second pulse indication laser; 7-a second sub-laser; 8-a second beam combiner; 9-a second adjustable mirror; 10-second optical axis detection means; 11-laser action target; 12-target indicating pulsed laser; 13-target monitoring camera; 14-a signal generator; 15-treatment system.
Detailed Description
All of the features disclosed in the specification for all of the embodiments (including any accompanying claims, abstract and drawings), or all of the steps of a method or process so disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
As shown in fig. 1, an on-target beam combining pointing detection control apparatus based on time-series detection includes: the system comprises a first pulse indication laser 1, a first sub-laser 2, a first beam combiner 3, a first adjustable reflector 4, a first optical axis detection device 5, a second pulse indication laser 6, a second sub-laser 7, a second beam combiner 8, a second adjustable reflector 9, a second optical axis detection device 10, a laser action target 11, a target indication pulse laser 12, a target monitoring camera 13, a signal generator 14 and a processing system 15; the first pulse indication laser 1, the second pulse indication laser 6, the target monitoring camera 13 and the processing system 15 are respectively electrically connected with the signal generator 14; the signal generator 14 outputs trigger signals to the first pulse indication laser 1, the second pulse indication laser 6, the target monitoring camera 13 and the processing system 15; the processing system 15 receives the image signal output by the target monitoring camera 13, determines the currently-emitted pulse indication laser according to the output signal of the signal generator 14, and controls the deflection of the adjustable mirror corresponding to the indication laser, so that the target monitoring camera 13 detects that the spot position of the output beam of the pulse indication laser on the laser action target 11 is consistent with the spot position of the output beam of the target indication laser 12.
Further, the first adjustable mirror 4 includes a tilted mirror driven by any one of a piezoelectric ceramic driver, an electrostrictive material driver, and a voice coil motor driver, or a plane mirror mounted on a motorized mirror mount.
Further, the second adjustable mirror 9 includes a tilting mirror driven by any one of a piezoelectric ceramic driver, an electrostrictive material driver, and a voice coil motor driver, or a plane mirror mounted on a motorized mirror mount.
Further, the first optical axis detection device 5 is composed of a convex lens and a camera disposed at a focal plane thereof; the second optical axis detection device 10 is composed of a convex lens and a camera placed in the focal plane thereof.
Further, the wavelengths of the first pulse indication laser 1, the second pulse indication laser 6 and the target indication pulse laser 12 are the same; the first sub-laser 2 and the second sub-laser 7 have the same wavelength, and the first sub-laser 2, the first pulse indication laser 1, the second pulse indication laser 6 and the target indication pulse laser 12 have different wavelengths.
Further, the target monitoring camera 13 is additionally provided with a notch filter, and the center wavelength of the notch filter is the same as the wavelengths of the first sub-laser 2 and the second sub-laser 7.
Further, the processing system 15 includes any one of a computer, an application specific integrated circuit board.
A processing system 15 judges a pulse sub-laser of the current output laser according to a received trigger signal, controls an adjustable reflector corresponding to the pulse sub-laser to act, and enables a target monitoring camera 13 to detect that the spot position of a first pulse indication laser 1 or a second pulse indication laser 6 on a laser action target 11 coincides with the spot position of a target indication laser 12.
Further, when the signal generator 14 emits the 3k +1 th pulse signal, the target indication pulse laser 12 outputs a laser pulse; when the signal generator 14 sends out the 3k +2 th pulse signal, the first pulse instructs the laser 1 to output a laser pulse; when the signal generator 14 sends out the 3k +3 th pulse signal, the second pulse instructs the laser 6 to output laser pulses; wherein k is 1, 2, 3 ….
Further, the specific implementation steps are as follows:
and 7, repeatedly executing the step 4, the step 5 and the step 6.
In the embodiment of the present invention, as shown in fig. 1, the apparatus is composed of a first pulse indication laser 1, a first sub-laser 2, a first beam combiner 3, a first adjustable mirror 4, a first optical axis detection device 5, a second pulse indication laser 6, a second sub-laser 7, a second beam combiner 8, a second adjustable mirror 9, a second optical axis detection device 10, a laser action target 11, a target indication pulse laser 12, a target monitoring camera 13, a signal generator 14 and a processing system 15. The signal generator 14 outputs trigger signals to the first pulse indication laser 1, the second pulse indication laser 6, the object monitoring camera 13, and the processing system 15. The processing system 15 receives the image signal output by the target monitoring camera 13, determines the currently-emitted pulse indication laser according to the output signal of the signal generator 14, and controls the deflection of the adjustable reflector corresponding to the indication laser, so that the target monitoring camera 13 detects that the spot position of the output beam of the pulse indication laser on the laser action target 11 is consistent with the spot position of the output beam of the target indication laser. The first adjustable mirror 4 and the second adjustable mirror 9 may be tilting mirrors driven by drivers such as piezoelectric ceramics, electrostrictive materials, voice coil motors, and the like, or may be plane mirrors installed on an electric mirror frame. The first optical axis detection means 5 and the second optical axis detection means 10 are constituted by a convex lens and a camera placed in the focal plane thereof. The first pulse indication laser 1, the second pulse indication laser 6 and the target indication pulse laser 12 have the same wavelength, and the first sub-laser 2 and the second sub-laser 7 have the same wavelength and are different from the first pulse indication laser 1, the second pulse indication laser 6 and the target indication pulse laser 12. According to the wavelength of the target indication pulse laser, a CCD (charge coupled device), a CMOS (complementary metal oxide semiconductor) or InGaAs (indium gallium arsenide) camera is selected as a target monitoring camera, a notch filter is additionally arranged in front of a lens, and the central wavelength is the same as the wavelengths of the first sub-laser and the second sub-laser. The processing system may be a computer or an application specific integrated circuit board.
When the signal generator 14 emits the 3 rd +1(k is 1, 2, 3 …) pulse signal, the target indication pulse laser 12 outputs a laser pulse; when the signal generator 14 sends out the 3k +2 th pulse signal, the first pulse instructs the laser 1 to output a laser pulse; the second pulse instructs the laser 6 to output a laser pulse when the signal generator 14 emits the 3k +3 th pulse signal.
The processing system 15 judges the pulse sub-laser of the currently output laser according to the received trigger signal, controls the action of the adjustable reflector corresponding to the pulse sub-laser, and enables the target monitoring camera to detect that the spot position of the first pulse indication laser 1 or the second pulse indication laser 6 on the laser action target coincides with the spot position of the target indication laser 12, and the specific implementation steps are as follows:
and step 1) adjusting the beam directions of the first pulse indication laser 1 and the first sub-laser 2 to be consistent according to the beam direction detection result of the first optical axis detection device 5.
And 2) adjusting the beam directions of the second pulse indication laser 6 and the second sub-laser 7 to be consistent according to the beam direction detection result of the second optical axis detection device 10.
And 3) adjusting the direction of the light beam output by the target indication pulse laser 12 to enable the light beam to be incident to the action target.
And 4) when the signal generator 14 sends out the 3k +1 th pulse, the target monitoring camera 13 shoots an image on an acting target, the processing system 15 receives the image, judges that the target indication pulse laser 12 outputs laser pulse, and calculates the spot position coordinates (x0, y0) of the light beam.
Step 5), when the signal generator 14 sends out the 3k +2 th pulse, the target monitoring camera 13 captures an image of an acting target, the processing system 15 receives the image, judges that the first pulse indicates that the laser 1 is outputting a laser pulse, calculates the spot position coordinates (x1, y1) and the spot coordinate deviation (Δ x1, Δ y1) of the light beam, wherein Δ x1 is x1-x0, and Δ y1 is y1-y0, and the processing system 15 outputs a deflection control signal to the first adjustable mirror 4 to deflect the first adjustable mirror 4, so that the spot position reaches (x0, y 0).
Step 6) when the signal generator 14 sends out the 3k +3 th pulse, the target monitoring camera 13 captures an image of an acting target, the processing system 15 receives the image, judges that the second pulse indicates that the laser 6 is outputting a laser pulse, calculates the spot position coordinates (x2, y2) of the light beam, calculates the spot coordinate deviation (Δ x2, Δ y2), wherein Δ x2 is x2-x0, and Δ y2 is y2-y0, and the processing system 15 outputs a deflection control signal to the second adjustable mirror 9 to deflect the second adjustable mirror 9, so that the spot position reaches (x0, y 0).
And 7) repeatedly executing the step 4), the step 5) and the step 6.
Wherein the processing system 15 uses a PID controller to control the deflection of the first adjustable mirror 4 and the second adjustable mirror 9, the principle and implementation of the PID controller are well known in the art, and will not be described herein.
The above embodiment is described by taking the example of the synthetic pointing detection and control on two sub-laser targets. When the device is used for synthesizing and pointing detection and control on more sub-laser targets, only one adjustable reflector, one pulse indication laser, one beam combining mirror and one optical axis detection device need to be configured for each sub-laser, and the principle is consistent with the above description.
In other embodiments of the present invention, the device for detecting and controlling the target-upper beam synthesis pointing of the two beams comprises a first pulse indication laser, a second pulse indication laser, and a target indication pulse laser, wherein the repetition frequencies of the first pulse indication laser, the second pulse indication laser, and the target indication pulse laser are all 1000Hz, and the wavelength is 1064 nm; the wavelengths of the first continuous laser and the second continuous laser are both 1030 nm; the target monitoring camera adopts an InGaAs image sensor, a trap filter with the central wavelength of 1030nm is arranged, and the sampling rate is 3000 Hz; the first beam combiner and the second beam combiner are made of fused quartz, the reflectivity is 99.5% (1030nm), and the transmittance is 98% (1064 nm); the signal generator outputs TTL pulse signals with the frequency of 3000 Hz; the adjustable reflector adopts a piezoelectric ceramic driver tilting mirror, and the action frequency is 1000 Hz; the processing system adopts a computer based on a real-time Linux operating system, and the processing frequency is 3000 Hz; the laser action target is a cross target, and the spot position of the target indication pulse laser is positioned in the center of the cross target. Fig. 2 shows a timing diagram of the operation of the apparatus. In the figure, the laser is represented by 1 when emitting light and 0 when not emitting light; when the target monitoring camera detects the light spot, the target monitoring camera is represented by 1, and when the target monitoring camera does not work, the target monitoring camera is represented by 0; 1 is used for processing the system to calculate the control signal, and 0 is used for non-working; the adjustable mirror deflection is indicated by 1 and the holding position by 0.
In fig. 2, the pulse indication laser 1 is a first pulse indication laser, the adjustable reflector 1 is a first adjustable reflector, the pulse indication laser 2 is a second pulse indication laser, and the adjustable reflector 2 is a second adjustable reflector.
The functionality of the present invention, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Other embodiments than the above examples may be devised by those skilled in the art based on the foregoing disclosure, or by adapting and using knowledge or techniques of the relevant art, and features of various embodiments may be interchanged or substituted and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.
Claims (10)
1. A target upper beam synthesis pointing detection control device based on time sequence detection is characterized by comprising a first pulse indication laser (1), a first sub-laser (2), a first beam combining mirror (3), a first adjustable reflecting mirror (4), a first optical axis detection device (5), a second pulse indication laser (6), a second sub-laser (7), a second beam combining mirror (8), a second adjustable reflecting mirror (9), a second optical axis detection device (10), a laser action target (11), a target indication pulse laser (12), a target monitoring camera (13), a signal generator (14) and a processing system (15); the first pulse indication laser (1), the second pulse indication laser (6), the target monitoring camera (13) and the processing system (15) are respectively and electrically connected with the signal generator (14); the signal generator (14) outputs trigger signals to the first pulse indication laser (1), the second pulse indication laser (6), the target monitoring camera (13) and the processing system (15); the processing system (15) receives the image signal output by the target monitoring camera (13), judges the pulse indication laser emitting light at present according to the output signal of the signal generator (14), controls the deflection of the adjustable reflector corresponding to the indication laser, and enables the target monitoring camera (13) to detect that the position of a light spot of the output light beam of the pulse indication laser on the laser action target (11) is consistent with the position of a light spot of the output light beam of the target indication laser (12).
2. The on-target beam-combining pointing detection control device based on time-series detection according to claim 1, wherein the first adjustable mirror (4) comprises a tilting mirror driven by any one of a piezo-ceramic driver, an electrostrictive material driver, a voice coil motor driver, or a plane mirror mounted on a motorized mirror mount.
3. The on-target beam combining pointing detection control apparatus based on time-series detection according to claim 1 or 2, characterized in that the second adjustable mirror (9) comprises a tilting mirror driven by any one of a piezo ceramic driver, an electrostrictive material driver, a voice coil motor driver, or a plane mirror mounted on a motorized mirror mount.
4. The on-target beam-combining pointing detection control apparatus based on time-series detection according to claim 1, characterized in that the first optical axis detection means (5) is constituted by a convex lens and a camera placed at a focal plane thereof; the second optical axis detection device (10) is composed of a convex lens and a camera arranged on the focal plane of the convex lens.
5. The on-target beam combining pointing detection control device based on time-series detection according to claim 1, wherein the first pulse indication laser (1), the second pulse indication laser (6), and the target indication pulse laser (12) have the same wavelength; the first sub laser (2) and the second sub laser (7) have the same wavelength, and the first sub laser (2), the first pulse indication laser (1), the second pulse indication laser (6) and the target indication pulse laser (12) have different wavelengths.
6. The device for controlling beam combination and pointing on an object based on time-series detection according to claim 1, wherein the object monitoring camera (13) is additionally provided with a notch filter, and the center wavelength of the notch filter is the same as the wavelength of the first sub-laser (2) and the second sub-laser (7).
7. The on-target beam combining pointing detection control device based on time-series detection according to claim 1, wherein the processing system (15) includes any one of a computer, an application specific integrated circuit board.
8. A target light beam synthesis pointing detection control method based on time sequence detection is characterized in that a processing system (15) judges a pulse sub-laser of current output laser according to a received trigger signal, controls an adjustable reflector corresponding to the pulse sub-laser to act, and enables a target monitoring camera (13) to detect that the spot position of a first pulse indication laser (1) or a second pulse indication laser (6) on a laser action target (11) coincides with the spot position of a target indication laser (12).
9. The control method for beam-combining pointing detection on a target based on time-series detection according to claim 8, wherein the target indication pulse laser (12) outputs a laser pulse when the signal generator (14) emits the 3k +1 th pulse signal; when the signal generator (14) sends out a 3k +2 pulse signal, the first pulse indicates the laser (1) to output a laser pulse; when the signal generator (14) sends out a 3k +3 pulse signal, the second pulse indication laser (6) outputs a laser pulse; wherein k is 1, 2, 3 ….
10. The method for controlling the beam combining and pointing on the target based on the time-series detection as claimed in claim 8, is characterized by comprising the following steps:
step 1, adjusting the beam pointing directions of a first pulse indication laser (1) and a first sub-laser (2) to be consistent according to the beam pointing detection result of a first optical axis detection device (5);
step 2, adjusting the beam pointing directions of the second pulse indication laser (6) and the second sub-laser (7) to be consistent according to the beam pointing detection result of the second optical axis detection device (10);
step 3, adjusting the output beam direction of the target indication pulse laser (12) to enable the beam to be incident on the laser action target (11);
step 4, when the signal generator (14) sends out the 3k +1 th pulse, the target monitoring camera (13) shoots the image on the acting target (11), the processing system (15) receives the image, judges that the target indication pulse laser (12) is outputting the laser pulse, and calculates the spot position coordinate (x) of the light beam0，y0) (ii) a Wherein k is 1, 2, 3 …;
step 5, when the signal generator (14) sends out the 3k +2 th pulse, the target monitoring camera (13) shoots the image of the acting target (11), the processing system (15) receives the image, judges that the first pulse indicates that the laser (1) is outputting laser pulses, and calculates the spot position coordinates (x1, y1) and the spot coordinate deviation (delta x) of the light beam1，Δy1) Wherein Δ x1＝x1-x0，Δy1＝y1-y0The processing system (15) outputs a deflection control signal to the first adjustable reflector (4) to deflect the first adjustable reflector so that the position of the light spot reaches (x)0，y0) (ii) a Wherein k is 1, 2, 3 …;
step 6, when the signal generator (14) sends out the 3k +3 th pulse, the target monitoring camera (13) shoots the image of the acting target (11), the processing system (15) receives the image, judges that the second pulse indicates that the laser (6) is outputting the laser pulse, and calculates the spot position coordinate (x) of the light beam2，y2) Calculating the coordinate deviation (Deltax) of the light spot2，Δy2) Wherein Δ x2＝x2-x0，Δy2＝y2-y0The processing system (15) outputs a deflection control signal to the second adjustable reflector (9) to deflect the second adjustable reflector so that the position of the light spot reaches (x)0，y0) (ii) a Wherein k is 1, 2, 3 …;
and 7, repeatedly executing the step 4, the step 5 and the step 6.
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| CN113078549A (en) * | 2021-03-25 | 2021-07-06 | 航天科工微电子系统研究院有限公司 | Direction control method for light beam synthesis on adaptive optical fiber collimator array target |
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