CN114609773A - Debugging method for high-power laser library light path - Google Patents
Debugging method for high-power laser library light path Download PDFInfo
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- CN114609773A CN114609773A CN202210140866.7A CN202210140866A CN114609773A CN 114609773 A CN114609773 A CN 114609773A CN 202210140866 A CN202210140866 A CN 202210140866A CN 114609773 A CN114609773 A CN 114609773A
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- reflector
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention relates to a high-power laser Kuder light path debugging method, belongs to the technical field of Kuder light path debugging, and is used for solving the defect that the Kuder light path debugging method in the prior art cannot avoid the change of the laser spot position in the rotating process of a rotary table. The method of the invention comprises the following steps: the reference mirror is arranged at the entrance position of the Kude optical path; a spectroscope, a fixed-focus lens and a first detector are sequentially arranged along an emergent light path, and a second detector is arranged on a reflected light path of the spectroscope; rotating the horizontal shaft, observing the variation of the cross position received by the first detector and the second detector, and controlling the variation of the cross position within a preset range by adjusting the first kud reflector and the second kud reflector; and rotating the pitching shaft, and controlling the change amount of the cross position within a preset range by adjusting the third kude reflector and the fourth kude reflector. One application of the present invention is the debugging technology of high-energy laser emission systems.
Description
Technical Field
The invention relates to the technical field of KudeDe optical path debugging, in particular to a high-power laser KudeDe optical path debugging method.
Background
With the continuous increase of the output power of the semiconductor laser, the development of high-energy laser emitting equipment is driven, the device has the characteristics of long working distance, high output energy and common tracking and transmitting light path, the laser in the system is often transmitted into the transmitting lens through the Kude light path system, the horizontal 360-degree scanning and the pitching 0-degree to 90-degree scanning are realized through the rotation of the KudeDe optical path, the traditional KudeDe optical path is installed and adjusted for an imaging system, only the optical axis angle is ensured not to change in the rotating process of the turntable, the light beam position can be translated, the beam expanding multiplying power of the telescope subsystem in the high-energy laser system is generally larger, when the position of the laser beam transmitted through the Kudet optical path is deviated, the position offset of the light spot on the primary mirror is amplified in equal proportion according to the beam expanding magnification, so that the high-energy laser exceeds the reflecting surface of the primary mirror, damage is caused to the system, and the laser spot position change caused by the rotation of the turntable is shown in fig. 1(a) and 1 (b). Wherein fig. 1(a) shows the laser emitting position when the device rotates to a certain position, and fig. 1(b) shows the laser emitting position when the device rotates to another position, it can be seen that the laser emitting position moves upwards in the process, and the conventional debugging method cannot eliminate such problems.
Disclosure of Invention
The invention aims to solve the defect that the Kude optical path debugging method in the prior art cannot avoid the change of the laser spot position in the rotating process of the turntable.
According to a first aspect of the present invention, a high power laser custody optical path debugging method is provided, wherein the custody optical path sequentially includes, from an entrance to an exit, a first custody mirror, a second custody mirror, a third custody mirror, and a fourth custody mirror; the method comprises the following steps: installing a reference mirror at the position of an entrance of a Kudet optical path, so that the central cross of the reference mirror coincides with the position of a high-power laser incident shaft, and the mirror surface of the reference mirror is vertical to the optical axis of the high-power laser; a spectroscope, a fixed-focus lens and a first detector are sequentially arranged along an emergent light path, and a second detector is arranged on a reflected light path of the spectroscope; an internal focusing telescope is used for aligning the reference mirror, the optical axis of the internal focusing telescope is in auto-collimation with the plane of the reference mirror, and the center of the internal focusing telescope coincides with the cross center of the reference mirror; fixing a pitching shaft of the turntable, rotating a horizontal shaft, observing the cross position variation received by the first detector and the second detector, and adjusting the first kude reflector and the second kude reflector to enable the cross position variation received by the first detector and the second detector to be respectively smaller than a first preset value and a second preset value when the horizontal shaft of the turntable is rotated; fixing a horizontal shaft of the rotary table, rotating a pitching shaft, observing the variation of the cross position received by the first detector and the second detector, and adjusting the third kude reflector and the fourth kude reflector to enable the variation of the cross position received by the first detector and the second detector to be respectively smaller than a third preset value and a fourth preset value when the pitching shaft of the rotary table is rotated.
Preferably, the focal length of the fixed-focus lens is 100 mm.
Preferably, the first preset value is 1 pixel, and the second preset value is 10 pixels.
The invention has the technical effects that: 1. the system has the advantages that the optical axis angle of the light beam after being transmitted through the Kude optical path is not changed, the optical axis position is not changed, the emission aperture of the system is reduced, the optical axis angle of the system turntable is not changed in the large-angle scanning process, the aiming accuracy of the system is improved, and meanwhile the safety of the system is improved. 2. The laser emission entrance reference mirror is aligned with the inner focusing telescope, the optical axis angle and the optical axis position of the Kude optical path are simultaneously monitored through the two detectors, the optical axis is coincided with the rotary table rotating shaft through adjusting the lens angle in the Kude optical path, the change of the optical axis angle in the 360-degree rotation process of the horizontal shaft after debugging is completed is less than 25 micro radians, the change of the light beam position is less than 0.025 millimeters, the tracking and aiming precision of the system is improved, the jumping quantity of light spots on the main mirror is reduced, the emission caliber of the system is reduced, and the safety of a high-power laser system is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a laser spot position change generated by a Kude optical path debugging method in the prior art; wherein fig. 1(a) is a schematic diagram of the position of the light beam when the turntable is at a certain rotation angle, and fig. 1(b) is a schematic diagram of the change of the position of the light beam when the turntable is at another rotation angle;
FIG. 2 is a schematic diagram showing the positional relationship between the Kude optical path and the horizontal and pitch rotation axes of the turntable; wherein A is the rotating shaft of the horizontal platform, B is the pitching rotating shaft;
FIG. 3 is a schematic diagram illustrating the state of the system after completion of steps S1-S3;
fig. 4 is a schematic diagram of turning the horizontal axis for debugging in step S4;
fig. 5 is a schematic diagram of turning the pitch axis for debugging in step S5.
Description of reference numerals:
1-first Coud mirror 2 second Coud mirror
3-third Coud mirror 4-fourth Coud mirror
5-Secondary mirror 6-Primary mirror
7-high-energy laser beam 8-reference mirror
9-inner focusing telescope 10-spectroscope
11-second detector 12-fixed focus lens
13-first detector
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The invention provides a high-power laser Kude optical path debugging method, wherein a Kude optical path is shown in figure 1(a), and sequentially comprises a first Kude reflector 1, a second Kude reflector 2, a third Kude reflector 3 and a fourth Kude reflector 4 from an inlet to an outlet, and further comprises a main mirror 6 and secondary mirrors 5 and 7 which are high-energy laser beams. Fig. 2 shows the position and direction of rotation of the rotating shaft, wherein the optical axis of the light beam between the first and second coud mirrors 1, 2 substantially coincides with the horizontal axis a of the turret, and the optical axis of the light beam exiting the fourth coud mirror substantially coincides with the pitch axis B. The meaning of substantial coincidence is: the device is already subjected to coarse adjustment, the rotating shaft and the corresponding optical axis are overlapped within the precision range of the coarse adjustment, but fine adjustment with higher precision is still needed to enable the variation of the position of the light spot to be smaller. That is, the final object of the present invention is to achieve fine adjustment by adjusting the position of each of the respective kudet mirrors again under the premise of substantial coincidence.
The method specifically comprises the following steps:
step S1: and (3) mounting the reference mirror 8 at the entrance position of the Kudet optical path, so that the central cross of the reference mirror 8 is superposed with the position of the high-power laser incidence axis, and the mirror surface of the reference mirror 8 is vertical to the optical axis of the high-power laser. "high power laser" is defined according to the general definition in the technical field to mean a laser having a power of not less than 10kW or a pulse energy of not less than 500J. The high power laser incident axis refers to the optical axis of the incident laser light entering the coude optical path and reflected by the first coude mirror 1 in fig. 3.
Step S2: a spectroscope 10, a fixed-focus lens 12 and a first detector 13 are sequentially arranged along an emergent light path, and a second detector 11 is arranged on a reflection light path of the spectroscope 10.
Step S3: an internal focusing telescope 9 is used for aligning the reference mirror 8, the optical axis of the internal focusing telescope 9 is in plane auto-collimation with the reference mirror 8, and the center of the internal focusing telescope 9 coincides with the cross center of the reference mirror 8. After steps S1 to S3 are completed, the state is the state shown in fig. 3, which is an initial state before debugging.
Step S4: fixing a pitching shaft of the rotary table, rotating a horizontal shaft, observing the variation of the cross position received by the first detector 13 and the second detector 11, and adjusting the first kude reflector 1 and the second kude reflector 2 to enable the variation of the cross position received by the first detector 13 and the second detector 11 when the horizontal shaft of the rotary table is rotated to be respectively smaller than a first preset value and a second preset value. The schematic diagram of this step is shown in fig. 4, namely, the device is changed from fig. 3 to the state of fig. 4 by rotating the rotating shaft of the horizontal table. In one embodiment, the pixel size of the first detector 13 and the pixel size of the second detector 11 are both 2.5 microns, and when the cross image received by the first detector 13 changes by 1 pixel along with one rotation of the turntable, the angular deviation between the optical axis of the high-energy laser and the rotating shaft is 25 micro radians; the cross image received by the second detector 11 changes by 1 pixel along with the rotation of the turntable, which indicates that the deviation between the optical axis of the high-energy laser and the position of the rotating shaft is 2.5 micrometers. It should be noted that the horizontal axis of rotation refers to a complete rotation, i.e. the rotation returns to the position shown in fig. 3 after completion of the rotation, and the variation refers to the maximum value of the deviation in the process.
Step S5: fixing a horizontal shaft of the rotary table, rotating a pitch shaft, observing the variation of the cross position received by the first detector 13 and the second detector 11, and adjusting the third kude reflector 3 and the fourth kude reflector 4 to enable the variation of the cross position received by the first detector 13 and the second detector 11 when the pitch shaft of the rotary table is rotated to be respectively smaller than a third preset value and a fourth preset value. The schematic diagram of this step is shown in fig. 5, namely, the device is changed from the state of fig. 3 to the state of fig. 5 by rotating the pitch axis. The pitch axis of rotation is the complete rotation, i.e. the rotation is completed and the position is returned to the position shown in fig. 3, and the variation is the maximum value of the deviation in the process.
The first preset value, the second preset value, the third preset value and the fourth preset value can be set to be different values and represent the precision requirements of different dimensions. The unit of the preset value may be a pixel. In a specific embodiment, the first preset value and the third preset value are 1 pixel, which means that the variation of the spot position of the first detector 13 in the rotation process of the two dimensions cannot be greater than 1 pixel, i.e. the angle deviation between the optical axis of the high-energy laser and the rotation axis needs to be less than 25 micro radians. The second preset value and the fourth preset value are 10 pixels, which means that the variation of the position of the light spot in the rotation process of the second detector 11 in two dimensions cannot be larger than 10 pixels, that is, the position deviation between the optical axis of the high-energy laser and the rotating shaft needs to be smaller than 25 micrometers.
Therefore, the method overcomes the defect that the position change of the high-energy laser beam in the scanning process cannot be controlled by the traditional Kurd optical path, and provides a high-precision debugging method based on the internal focusing telescope and the light splitting detection mirror group. Finally, the optical axis angle is not changed when the rotary table rotates, and the position of the light beam is not changed.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (3)
1. A high-power laser Kude optical path debugging method is characterized in that a Kude optical path sequentially comprises a first Kude reflector, a second Kude reflector, a third Kude reflector and a fourth Kude reflector from an inlet to an outlet;
characterized in that the method comprises:
installing a reference mirror at the position of an entrance of a KudeDe light path, so that the central cross of the reference mirror coincides with the position of an incident light axis, and the mirror surface of the reference mirror is vertical to the optical axis of the high-power laser;
a spectroscope, a fixed-focus lens and a first detector are sequentially arranged along an emergent light path, and a second detector is arranged on a reflected light path of the spectroscope;
an internal focusing telescope is used for aligning the reference mirror, the optical axis of the internal focusing telescope is in auto-collimation with the plane of the reference mirror, and the center of the internal focusing telescope coincides with the cross center of the reference mirror;
fixing a pitching shaft of the turntable, rotating a horizontal shaft, observing the cross position variation received by the first detector and the second detector, and adjusting the first kude reflector and the second kude reflector to enable the cross position variation received by the first detector and the second detector to be respectively smaller than a first preset value and a second preset value when the horizontal shaft of the turntable is rotated;
fixing a horizontal shaft of the rotary table, rotating a pitching shaft, observing the variation of the cross position received by the first detector and the second detector, and adjusting the third kude reflector and the fourth kude reflector to enable the variation of the cross position received by the first detector and the second detector to be respectively smaller than a third preset value and a fourth preset value when the pitching shaft of the rotary table is rotated.
2. The high power laser library optical path debugging method of claim 1,
the focal length of the fixed-focus lens is 100 mm.
3. The high power laser Kurdu optical path debugging method of claim 2,
the first preset value and the third preset value are 1 pixel, and the second preset value and the fourth preset value are 10 pixels.
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| CN202210140866.7A CN114609773B (en) | 2022-02-16 | 2022-02-16 | High-power laser kude optical path debugging method |
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| CN202210140866.7A CN114609773B (en) | 2022-02-16 | 2022-02-16 | High-power laser kude optical path debugging method |
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| CN114609773B CN114609773B (en) | 2023-05-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436028A (en) * | 2022-11-07 | 2022-12-06 | 中国航天三江集团有限公司 | High-precision light beam regulating and controlling device and using method thereof |
| CN116594188A (en) * | 2023-05-25 | 2023-08-15 | 中国科学院长春光学精密机械与物理研究所 | Method for adjusting kude optical path of large-caliber telescope |
| CN116594188B (en) * | 2023-05-25 | 2024-05-10 | 中国科学院长春光学精密机械与物理研究所 | Method for adjusting kude optical path of large-caliber telescope |
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| CN108828765A (en) * | 2018-06-04 | 2018-11-16 | 华中科技大学 | A kind of library moral optical path Method of Adjustment based on two transits |
| US20200021075A1 (en) * | 2018-07-12 | 2020-01-16 | Electronics And Telecommunications Research Institute | Laser module and laser system including the same |
| CN111638592A (en) * | 2020-06-10 | 2020-09-08 | 北京卫星环境工程研究所 | Laser tracking and aiming directional emission test system and test method |
| CN113866969A (en) * | 2021-10-25 | 2021-12-31 | 航天科工微电子系统研究院有限公司 | Light path system for light beam tracking and aiming equipment |
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2022
- 2022-02-16 CN CN202210140866.7A patent/CN114609773B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828765A (en) * | 2018-06-04 | 2018-11-16 | 华中科技大学 | A kind of library moral optical path Method of Adjustment based on two transits |
| US20200021075A1 (en) * | 2018-07-12 | 2020-01-16 | Electronics And Telecommunications Research Institute | Laser module and laser system including the same |
| CN111638592A (en) * | 2020-06-10 | 2020-09-08 | 北京卫星环境工程研究所 | Laser tracking and aiming directional emission test system and test method |
| CN113866969A (en) * | 2021-10-25 | 2021-12-31 | 航天科工微电子系统研究院有限公司 | Light path system for light beam tracking and aiming equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436028A (en) * | 2022-11-07 | 2022-12-06 | 中国航天三江集团有限公司 | High-precision light beam regulating and controlling device and using method thereof |
| CN116594188A (en) * | 2023-05-25 | 2023-08-15 | 中国科学院长春光学精密机械与物理研究所 | Method for adjusting kude optical path of large-caliber telescope |
| CN116594188B (en) * | 2023-05-25 | 2024-05-10 | 中国科学院长春光学精密机械与物理研究所 | Method for adjusting kude optical path of large-caliber telescope |
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