Kude optical path reverse installation method

Abstract

The present invention relates to the technical field of optical-mechanical system alignment, and in particular to a Kuder optical path reverse alignment method, comprising: S1, calibrating the pitch axis using a theodolite and a pitch axis reference mirror; S2, mounting a first reflector on a pitch frame, and adjusting the tilt angle of the first reflector so that the autocollimation image of the theodolite is located at the center of a graticule; S3, mounting the azimuth axis reference mirror on the azimuth frame; S4, mounting a second reflector on the azimuth frame; S5, aligning the theodolite with the incident light axis reference mirror so that the autocollimation image of the theodolite is located at the center of the graticule; S6, mounting a fifth reflector on a base; and S7, reinstalling an optical terminal on an incident reference mounting surface. The present invention utilizes a single theodolite to achieve alignment of reflectors at different positions, and has the advantages of high alignment accuracy, ease of operation, and a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of optical-mechanical system assembly and adjustment, and in particular to a reverse assembly and adjustment method for a Kuder optical path. Background Art

[0002] As performance indicators like resolution and range continue to improve for electro-optical tracking and aiming systems, installing optical terminals such as lasers, optical imaging lenses, and detectors within the optomechanical system has become increasingly complex. Due to device size and weight limitations, optical terminals are typically mounted within a fixed base. Coudé optical paths are then used to guide and control the beam's path, achieving precise control of the optical axis's orientation.

[0003] The Coudé optical path is a fully internal reflection light guide composed of multiple plane mirrors mounted on a two-axis turntable. The two-axis turntable drives the mirrors' rotation, allowing the light beam emitted from the optical terminal to pass through the multiple mirrors within the Coudé optical path and then be emitted in the desired direction. The alignment accuracy of the Coudé optical path is a crucial factor influencing the optical axis pointing accuracy of the electro-optical tracking and aiming system.

[0004] Chinese patent application publication number CN114415389A discloses a method for assembling an optical-mechanical system containing multiple reflectors. The patent uses two theodolites to calibrate the azimuth and elevation axes respectively, then uses a large-aperture plane reflector to translate the reference and theodolites to transfer the azimuth and elevation references to different positions. Finally, the patent completes the assembly and adjustment of each reflector by using multiple theodolites at different positions to aim at each other. Summary of the Invention

[0005] In order to solve the problems that the existing adjustment method requires multiple complex reference transfers to achieve the adjustment of reflectors in different positions, which has low adjustment accuracy and complicated operation, the present invention provides a Kuder optical path reverse adjustment method, which can achieve the adjustment of reflectors in different positions using a single theodolite, and has the advantages of high adjustment accuracy, simple operation and wide application range.

[0006] The present invention provides a Kude optical path reverse adjustment method. The tools used in the adjustment method include a two-axis turntable and a theodolite. The two-axis turntable includes a base, an azimuth frame, and a pitch frame. The pitch frame and the base are arranged on both sides of the azimuth frame. The pitch frame is mounted on the azimuth frame via a pitch rotation axis. The azimuth frame is mounted on the base via an azimuth rotation axis. The pitch rotation axis is perpendicular to the azimuth rotation axis. The Kude optical path reverse adjustment method specifically includes the following steps:

[0007] S1. Install the output optical axis reference mirror on the output reference mounting surface of the pitch frame, install the pitch axis reference mirror on the pitch frame, and make the pitch axis pass through the mirror surface of the pitch axis reference mirror, and calibrate the pitch axis using the theodolite and the pitch axis reference mirror.

[0008] S2. Keep the theodolite in place, remove the pitch axis reference mirror, install the first reflector on the pitch frame so that the pitch axis passes through the center of the first reflector, and adjust the tilt angle of the first reflector so that the autocollimation image of the theodolite is located in the center of the reticle.

[0009] S3. Install the azimuth axis reference mirror on the azimuth frame, and make the azimuth axis pass through the mirror surface of the azimuth axis reference mirror, and calibrate the azimuth axis through the azimuth axis reference mirror and theodolite.

[0010] S4. Keep the theodolite in place, remove the azimuth axis reference mirror, fix the third and fourth reflectors on the azimuth frame, and install the second reflector on the azimuth frame. Adjust the inclination angle of the second reflector so that the autocollimation image of the theodolite is located in the center of the graticule.

[0011] S5. Install the optical terminal on the incident reference mounting surface of the base. An incident light axis reference mirror is installed on the optical terminal, and the optical terminal and the incident light axis reference mirror are coaxial. Align the theodolite with the incident light axis reference mirror so that the autocollimation image of the theodolite is located at the center of the reticle.

[0012] S6. Keep the theodolite in place, remove the optical terminal, and install the fifth reflector on the base. The fifth reflector is located on the azimuth axis. Adjust the inclination angle of the fifth reflector so that the autocollimation image of the theodolite is located at the center of the reticle.

[0013] S7. Reinstall the optical terminal on the incident reference mounting surface.

[0014] Preferably, the first reflector, the second reflector, the pitch axis reference mirror, the azimuth axis reference mirror and the fifth reflector are correspondingly mounted on the base, the azimuth frame and the pitch frame through angle adjustment fixtures.

[0015] Preferably, the output optical axis reference mirror, the third reflector, the fourth reflector and the optical terminal are correspondingly mounted on the base, the azimuth frame and the pitch frame through mechanical positioning references.

[0016] Preferably, in step S1, the pitch axis calibration method is: aligning the theodolite with the pitch axis reference mirror and placing the autocollimation image of the theodolite in the central peripheral area of ​​the graticule, changing the inclination angle of the pitch axis reference mirror by adjusting the angle adjustment fixture, and rotating the pitch frame until the autocollimation image of the theodolite remains stationary during the rotation of the pitch frame, and adjusting the theodolite so that the autocollimation image of the theodolite is located in the center of the graticule.

[0017] Preferably, in step S3, the calibration method of the azimuth axis is: aligning the theodolite with the azimuth axis reference mirror and placing the autocollimation image of the theodolite in the central peripheral area of ​​the graticule, changing the inclination angle of the azimuth axis reference mirror by adjusting the angle adjustment tool, and rotating the azimuth frame until the autocollimation image of the theodolite remains stationary during the rotation of the azimuth frame, and adjusting the theodolite so that the autocollimation image of the theodolite is located in the center of the graticule.

[0018] Preferably, the optical terminal is a laser emission system, an optical imaging lens assembly or a detector.

[0019] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0020] (1) The Kud optical path reverse adjustment method proposed in the present invention only requires adjustment of three reflectors during the adjustment process, and does not require dynamic adjustment of the azimuth axis and pitch axis during the adjustment process of the reflectors. The operation is simple and the adjustment efficiency is high.

[0021] (2) The Kud optical path reverse adjustment method proposed in the present invention only requires the use of one theodolite to calibrate the pitch axis, azimuth axis and incident light axis of the optical terminal in sequence during the adjustment process, and the reflector is directly adjusted in reverse sequence based on the autocollimation image of the theodolite, without the need for reference transfer, thereby reducing the source of error and achieving high adjustment accuracy.

[0022] (3) The adjustment method proposed in the present invention can complete the calibration of the optical axis of the entire optical system, including the outgoing optical axis of the optical system and the incident optical axis of the optical terminal, while completing the adjustment of the Kuder optical path reflector. In addition, the self-collimation optical path of the theodolite is exactly the same as the actual beam path of the optical system, ensuring that the adjustment state of the optical system is consistent with the actual working conditions, without any additional errors, and improving the adjustment accuracy of the optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 2 is a schematic structural diagram of a Kude optical path according to an embodiment of the present invention;

[0024] Figure 2 1 is a flow chart of a Kude optical path reverse adjustment method according to an embodiment of the present invention;

[0025] Figure 3-Figure 8 A schematic diagram of the adjustment methods at each adjustment stage in the Kuder optical path reverse adjustment method provided according to an embodiment of the present invention.

[0026] Figure numerals: first reflector 1, second reflector 2, third reflector 3, fourth reflector 4, fifth reflector 5, optical terminal 6, two-axis turntable 7, base 7-1, azimuth frame 7-2, pitch frame 7-3, azimuth axis 7-2-1, pitch axis 7-3-1, outgoing optical axis reference mirror 8, pitch axis reference mirror 9, theodolite 10, azimuth axis reference mirror 11 and incident optical axis reference mirror 12. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, identical modules are denoted by identical reference numerals. In the case of identical reference numerals, their names and functions are also identical. Therefore, their detailed description will not be repeated.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0029] The Kuder optical path reverse adjustment method provided by the present invention is used to adjust the light beam emitted by the optical terminal through a two-axis turntable and a theodolite. The two-axis turntable includes a base, an azimuth frame and a pitch frame. The pitch frame and the base are arranged on both sides of the azimuth frame. The pitch frame is installed on the azimuth frame through the pitch axis. The azimuth frame is installed on the base through the azimuth rotation axis. The pitch rotation axis is perpendicular to the azimuth rotation axis.

[0030] See also Figure 1 The structure of the Coode optical path shown in the figure is composed of a light path from the optical terminal 6 that is incident on the fifth reflector 5, the fourth reflector 4, the third reflector 3, the second reflector 2 and the first reflector 1 in sequence.

[0031] The Kude optical path includes five plane reflectors and an optical terminal 6. The five plane reflectors, from beam exit to beam entrance, include a first reflector 1, a second reflector 2, a third reflector 3, a fourth reflector 4, a fifth reflector 5, and the optical terminal 6. The second, third, and fourth reflectors 2, 3, and 4 are mounted on an azimuth frame 7-2 and rotate with the azimuth frame 7-2 about its azimuth axis relative to the base 7-1. The first reflector 1 is mounted on a pitch frame 7-3 and rotates with the pitch frame 7-3 about its pitch axis relative to the azimuth frame 7-2. Simultaneously, the pitch frame 7-3 rotates integrally with the azimuth frame 7-2 about its azimuth axis. Rotating the azimuth frame 7-2 and pitch frame 7-3 drives the rotation of the first, second, third, and fourth reflectors 4. The light beam emitted by the optical terminal 6 is deflected by the five reflectors within the Kude optical path and then emitted in a specified direction, achieving precise control of the beam's direction.

[0032] Figure 2 The flowchart of the Kuder optical path reverse adjustment method provided in accordance with an embodiment of the present invention is shown.

[0033] like Figure 2 As shown, in order to facilitate the understanding of the adjustment process of the Kude optical path reverse adjustment method, the following is combined with Figure 3-Figure 8 The following are the adjustment methods of each adjustment stage in the Kude optical path reverse adjustment method provided by the embodiment of the present invention to illustrate the Kude optical path reverse adjustment method. The Kude optical path reverse adjustment method proposed by the embodiment of the present invention specifically includes the following steps:

[0034] S1. Install the output optical axis reference mirror 8 on the output reference mounting surface of the pitch frame 7-3, install the pitch axis reference mirror 9 on the pitch frame 7-3, and make the pitch axis 7-3-1 pass through the mirror surface of the pitch axis reference mirror 9, and calibrate the pitch axis 7-3-1 through the theodolite 10 and the pitch axis reference mirror 9.

[0035] In step S1, the calibration method of the pitch axis 7-3-1 is as follows: align the theodolite 10 with the pitch axis reference mirror 9 and place the autocollimation image of the theodolite 10 in the central peripheral area of ​​the graticule. Change the inclination angle of the pitch axis reference mirror 9 by adjusting the angle adjustment fixture, and rotate the pitch frame 7-3 until the autocollimation image of the theodolite 10 remains stationary during the rotation of the pitch frame 7-3. Adjust the theodolite 10 so that the autocollimation image of the theodolite 10 is located in the center of the graticule.

[0036] The exit reference mounting surface is perpendicular to the exit light beam.

[0037] S2. Keep the position of theodolite 10 unchanged, remove the pitch axis reference mirror 9, install the first reflector 1 on the pitch frame 7-3, make the pitch axis 7-3-1 pass through the center of the first reflector 1, adjust the inclination angle of the first reflector 1, make the autocollimation image of theodolite 10 located at the center of the graticule.

[0038] S3. Install the azimuth axis reference mirror 11 on the azimuth frame 7-2, and make the azimuth axis 7-2-1 pass through the mirror surface of the azimuth axis reference mirror 11, and calibrate the azimuth axis 7-2-1 through the azimuth axis reference mirror 11 and theodolite 10.

[0039] In step S3, the calibration method of the azimuth axis 7-2-1 is as follows: align the theodolite 10 with the azimuth axis reference mirror 11 and place the autocollimation image of the theodolite 10 in the central peripheral area of ​​the graticule. Change the inclination angle of the azimuth axis reference mirror 11 by adjusting the angle adjustment fixture, and rotate the azimuth frame 7-2 until the autocollimation image of the theodolite 10 remains stationary during the rotation of the azimuth frame 7-2. Adjust the theodolite 10 so that the autocollimation image of the theodolite 10 is located in the center of the graticule.

[0040] S4. Keep the position of theodolite 10 unchanged, remove the azimuth axis reference mirror 11, fix the third reflector 3 and the fourth reflector 4 on the azimuth frame 7-2, and install the second reflector 2 on the azimuth frame 7-2, adjust the inclination angle of the second reflector 2, so that the autocollimation image of theodolite 10 is located at the center of the graticule.

[0041] S5. Install the optical terminal 6 on the incident reference mounting surface of the base 7-1. The incident optical axis reference mirror 12 is installed on the optical terminal 6, and the optical terminal 6 is coaxial with the incident optical axis reference mirror 12. Align the theodolite 10 with the incident optical axis reference mirror 12 so that the autocollimation image of the theodolite 10 is located at the center of the graticule.

[0042] S6. Keep the position of theodolite 10 unchanged, remove the optical terminal 6, install the fifth reflector 5 on the base 7-1, and the fifth reflector 5 is located on the azimuth axis 7-2-1. Adjust the inclination angle of the fifth reflector 5 so that the autocollimation image of theodolite 10 is located at the center of the graticule.

[0043] S7. Reinstall the optical terminal 6 on the incident reference mounting surface.

[0044] The optical terminal 6 is a laser emission system, an optical imaging lens group or a detector.

[0045] Since in step S5 and step S7, the optical terminal 6 is installed on the incident reference mounting surface through a mechanical positioning reference, and the autocollimation image of the theodolite 10 at this time should be located at the center of the graticule, that is, the optical axis of the optical terminal 6 coincides with the incident optical axis of the Coode optical path.

[0046] Among them, the mechanical positioning reference can be designed according to the optical axis pointing requirements of the optical-mechanical system and the installation interface requirements of each reference mirror.

[0047] The first reflecting mirror 1, the second reflecting mirror 2, the pitch axis reference mirror 9, the azimuth axis reference mirror 11 and the fifth reflecting mirror 5 are correspondingly mounted on the base 7-1, the azimuth frame 7-2 and the pitch frame 7-3 through angle adjustment fixtures.

[0048] The output optical axis reference mirror 8, the third reflector 3, the fourth reflector 4 and the optical terminal 6 are correspondingly mounted on the base 7-1, the azimuth frame 7-2 and the pitch frame 7-3 through mechanical positioning references.

[0049] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved. This is not limited herein.

[0050] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A Kude optical path reverse adjustment method, wherein the tools used in the adjustment method include a two-axis turntable and a theodolite, wherein the two-axis turntable includes a base, an azimuth frame, and a pitch frame, wherein the pitch frame and the base are arranged on both sides of the azimuth frame, wherein the pitch frame is mounted on the azimuth frame via a pitch rotation axis, wherein the azimuth frame is mounted on the base via an azimuth rotation axis, wherein the pitch rotation axis is perpendicular to the azimuth rotation axis, wherein: The Kude optical path reverse adjustment method specifically includes the following steps: S1. Install an exit optical axis reference mirror on the exit reference mounting surface of the pitch frame, install a pitch axis reference mirror on the pitch frame, and make the pitch axis pass through the mirror surface of the pitch axis reference mirror, and calibrate the pitch axis using the theodolite and the pitch axis reference mirror; S2. Keeping the theodolite in place, remove the pitch axis reference mirror, and install a first reflector on the pitch frame so that the pitch axis passes through the center of the first reflector. Adjust the tilt angle of the first reflector so that the autocollimation image of the theodolite is located at the center of the reticle. S3, installing an azimuth axis reference mirror on the azimuth frame, and allowing the azimuth axis to pass through the mirror surface of the azimuth axis reference mirror, and calibrating the azimuth axis through the azimuth axis reference mirror and the theodolite; S4, keeping the theodolite in place, removing the azimuth axis reference mirror, fixing the third and fourth reflectors on the azimuth frame, and installing the second reflector on the azimuth frame, adjusting the inclination angle of the second reflector so that the autocollimation image of the theodolite is located at the center of the reticle; S5. Mounting an optical terminal on the incident reference mounting surface of the base, wherein an incident optical axis reference mirror is mounted on the optical terminal and the optical terminal is coaxial with the incident optical axis reference mirror, and aligning the theodolite with the incident optical axis reference mirror so that the autocollimation image of the theodolite is located at the center of the reticle; S6. Keeping the theodolite in place, remove the optical terminal, and install a fifth reflector on the base, with the fifth reflector located on the azimuth axis. Adjust the inclination angle of the fifth reflector so that the autocollimation image of the theodolite is located at the center of the reticle. S7. Reinstall the optical terminal on the incident reference mounting surface.

2. The Kude optical path reverse adjustment method according to claim 1, characterized in that: The first reflector, the second reflector, the pitch axis reference mirror, the azimuth axis reference mirror and the fifth reflector are correspondingly mounted on the base, the azimuth frame and the pitch frame through angle adjustment fixtures.

3. The Kude optical path reverse adjustment method according to claim 1, characterized in that: The output optical axis reference mirror, the third reflector, the fourth reflector and the optical terminal are correspondingly mounted on the base, the azimuth frame and the pitch frame through a mechanical positioning reference.

4. The Kude optical path reverse adjustment method according to claim 2, characterized in that: In step S1, the pitch axis calibration method is as follows: aligning the theodolite with the pitch axis reference mirror and placing the autocollimation image of the theodolite in the center peripheral area of ​​the reticle; changing the tilt angle of the pitch axis reference mirror by adjusting the angle adjustment fixture; rotating the pitch frame until the autocollimation image of the theodolite remains stationary during the rotation of the pitch frame; and adjusting the theodolite so that the autocollimation image of the theodolite is located in the center of the reticle.

5. The Kude optical path reverse adjustment method according to claim 2, characterized in that: In step S3, the azimuth axis calibration method is as follows: aligning the theodolite with the azimuth axis reference mirror and placing the autocollimation image of the theodolite in the central peripheral area of ​​the graticule; changing the inclination angle of the azimuth axis reference mirror by adjusting the angle adjustment fixture; rotating the azimuth frame until the autocollimation image of the theodolite remains stationary during the rotation of the azimuth frame; and adjusting the theodolite so that the autocollimation image of the theodolite is located in the center of the graticule.

6. The Kude optical path reverse adjustment method according to claim 1, characterized in that: The optical terminal is a laser emission system, an optical imaging lens group or a detector.

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