A pitch-following mirror adjustment device and adjustment method

Abstract

The present invention relates to a pitch follower mirror adjustment device and adjustment method, belonging to the field of optical-mechanical adjustment technology; the adjustment device includes an internal focusing light tube, a four-dimensional adjustable reticle tooling, a support platform, and a five-dimensional adjustment platform; the support platform is used to place a photoelectric detection product including an axis system and a pitch follower mirror; the four-dimensional adjustable reticle tooling is fixedly connected to the rotary axis system and is used to calibrate the rotary axis of the rotary axis system; the five-dimensional adjustment platform is used to place the internal focusing light tube, which is used to observe the auto-collimation image and differentiated image of the four-dimensional adjustable reticle tooling; the optical axis of the internal focusing light tube is aligned with the center axis of the reticle of the four-dimensional adjustable reticle tooling, and is used to establish an adjustment reference. The adjustment method first calibrates the rotary axis of the rotary axis system, then establishes the adjustment reference, and finally performs optical-mechanical adjustment of the pitch follower mirror, which has the characteristics of high adjustment accuracy. The present invention has the characteristics of high adjustment accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical-mechanical assembly and adjustment, and in particular relates to an assembly and adjustment device for a pitch-following mirror and an assembly and adjustment method. Background Art

[0002] As the detection range of airborne photoelectric detection equipment continues to increase, the aperture of its optical system continues to increase, and the optical system layout becomes increasingly compact. The mechanical rotation structure of a certain type of airborne photoelectric detection equipment consists of an upper azimuth axis system, a lower azimuth axis system, an upper pitch axis system, and a lower pitch axis system. A pitch follower mirror is located at the intersection of the pitch and azimuth axis systems (the center of the sphere). This optical mirror is fixed to the pitch axis system. When the airborne photoelectric detection equipment is operating, the azimuth axis system rotates and the pitch follower mirror remains stationary, while the pitch axis system rotates and the pitch follower mirror rotates synchronously with the follower axis system. That is, the light beam incident on the pitch follower mirror is always coaxial with the pitch axis system's rotation axis, and the light beam emitted by the pitch follower mirror is always coaxial with the azimuth axis system's rotation axis. This configuration of pitch follower mirrors requires high precision and is difficult to assemble and adjust, which cannot be met by existing assembly and adjustment equipment. Summary of the Invention

[0003] Technical issues to be solved:

[0004] In order to avoid the shortcomings of the existing technology, the present invention provides a pitch follower mirror adjustment device and adjustment method. The adjustment device includes an internal focusing light tube, a four-dimensional adjustable graticule tooling, a support table and a five-dimensional adjustment table. The adjustment method using the adjustment device first calibrates the rotary axis of the rotary axis system, then establishes the adjustment reference, and finally performs optical and mechanical adjustment of the pitch follower mirror, which has the characteristics of high adjustment accuracy.

[0005] The technical solution of the present invention is: a pitch follower mirror installation and adjustment device, comprising an internal focusing light tube, a four-dimensional adjustable reticle tooling, a support platform and a five-dimensional adjustment platform;

[0006] The support platform is used to place the photoelectric detection product including the shaft system and the pitch follower mirror;

[0007] The four-dimensional adjustable reticle fixture is fixedly connected to the rotary axis system, and includes a reticle and four-dimensional adjustment mechanisms for azimuth, pitch, x-axis translation, and y-axis translation, which are used to calibrate the rotary axis of the rotary axis system;

[0008] The five-dimensional adjustment platform is used to place an internal focusing light tube, which is used to observe the auto-collimation image and differentiated image of the four-dimensional adjustable reticle tooling;

[0009] The optical axis of the inner focusing light tube is aligned with the center axis of the graticule of the four-dimensional adjustable graticule fixture, so as to establish an adjustment reference.

[0010] A method for adjusting a pitch-following mirror adjustment device, comprising the following specific steps:

[0011] Step 1: Use screws to secure the two 4D adjustable reticle fixtures to the right pitch axis and the lower position axis of the product respectively.

[0012] Step 2: Place the inner focusing light tube on a five-dimensional adjustment stage, image the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture within the field of view of the inner focusing light tube, rotate the rotary axis system, and obtain the position deviation between the axis system rotary axis and the reticle center axis;

[0013] Step 3: Continuously adjusting the five-dimensional adjustment stage and the four-dimensional adjustable reticle fixture based on the position deviation until the rotation axis of the rotary axis system approximately coincides with the central axis of the reticle;

[0014] Step 4: Use screws to securely connect the right pitch axis system, the lower position axis system, and the airborne photoelectric detection device, and securely connect the pitch follower mirror to the right pitch axis system;

[0015] Step 5: Adjust the spatial position of the inner focusing light tube and the right pitch axis system, align the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture on the right pitch axis system with the cross center of the inner focusing light tube, remove the four-dimensional adjustable reticle fixture on the right pitch axis system, and complete the installation and adjustment reference establishment;

[0016] Step 6: Adjust the focal length of the inner focusing light tube to form the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling on the lower axis system within the field of view of the inner focusing light tube;

[0017] Step 7: Grind the mounting surface of the pitch follower mirror, or directly increase or decrease the thickness of the gasket between the pitch follower mirror and the right pitch axis system to ensure that the auto-collimation image and differentiated image of the four-dimensional adjustable reticle tooling on the lower axis system are aligned with the cross center of the internal focusing light tube, and the pitch follower mirror is installed and adjusted.

[0018] A further technical solution of the present invention is: the adjustment method in step 3 is to adjust the azimuth and pitch knobs of the four-dimensional adjustable graticule fixture, adjust the circle drawing amount of the autocollimation image of the four-dimensional adjustable graticule fixture to less than 10", adjust the x translation and y translation knobs of the four-dimensional adjustable graticule fixture, adjust the circle drawing amount of the graticule image of the four-dimensional adjustable graticule fixture to less than 0.03mm, adjust the spatial position of the five-dimensional adjustment stage, and make the cross center of the internal focusing light tube coincide with the autocollimation image and the differentiated image of the four-dimensional adjustable graticule fixture respectively.

[0019] A further technical solution of the present invention is: the method for establishing the installation reference in step 5 is to adjust the positions of the support platform and the photoelectric detection device, image the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling on the right pitch axis system into the internal focusing light tube, adjust the spatial position of the five-dimensional adjustment platform, and make the cross center of the internal focusing light tube coincide with the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling, respectively, with the autocollimation image coincidence accuracy being less than 2", and the differentiated image coincidence accuracy being less than 0.01mm.

[0020] A further technical solution of the present invention is: in step 7, the method for aligning the auto-collimation image and the differentiated image of the four-dimensional adjustable reticle tooling with the cross center of the internal focusing light tube is as follows: rotating, grinding or beveling the mounting surface position of the pitch follower mirror, adjusting the auto-collimation image of the four-dimensional adjustable reticle tooling on the lower axis system to coincide with the cross center of the auto-collimation image of the internal focusing light tube, with an overlap accuracy of less than 15", increasing or decreasing the overall thickness of the shim at the mounting surface position of the pitch follower mirror, adjusting the differentiated image of the four-dimensional adjustable reticle tooling on the lower axis system to coincide with the cross center of the differentiated image of the internal focusing light tube, with an overlap accuracy of less than 0.05mm.

[0021] Beneficial effects

[0022] The beneficial effects of the present invention are:

[0023] 1) The present invention solves the problem of assembling and adjusting a pitch-following mirror located at the center of a rotating body, and the assembly and adjustment method is simple and effective.

[0024] 2) The present invention has high adjustment accuracy. After adjustment, the optical axis angular deviation is less than 15", and the optical axis coaxiality is less than 0.05mm.

[0025] 3) The alignment method of the present invention can be extended to high-precision alignment of optical axes of optical systems of other configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the adjustment device of the present invention;

[0027] Explanation of the accompanying symbols: 1. Internal focusing light tube; 2. Four-dimensional adjustable reticle tooling; 3. Support table; 4. Five-dimensional adjustment table; 5. Right pitch axis system; 6. Small azimuth axis system; 7. Pitch follower mirror; 8. Upper azimuth axis system; 9. Left pitch axis system. DETAILED DESCRIPTION

[0028] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0029] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0033] Reference Figure 1 As shown, in one embodiment of the present invention, a device for assembling and adjusting a pitch-following mirror 7 is provided, comprising an internal focusing light tube 1, a four-dimensional adjustable reticle tooling 2, a support platform 3, and a five-dimensional adjustment platform 4;

[0034] The support platform 3 is used to place the photoelectric detection product including the upper azimuth axis system 8, the lower azimuth axis system 6, the left pitch axis system 9, the right pitch axis system 5 and the pitch follower mirror 7;

[0035] The four-dimensional adjustable reticle fixture 2 is connected to the rotary axis system by screws, and includes a reticle and a four-dimensional adjustment mechanism for azimuth, pitch, x-translation, and y-translation, which is used to calibrate the rotary axis of the rotary axis system;

[0036] The five-dimensional adjustment stage 4 is used to place the inner focusing light tube 1 for observing the autocollimation image and differentiated image of the four-dimensional adjustable reticle tooling 2. The optical axis of the inner focusing light tube 1 is aligned with the central axis of the reticle of the four-dimensional adjustable reticle tooling 2 to establish an adjustment reference.

[0037] In one embodiment, a method for adjusting a pitch-following mirror 7 according to the present invention includes the following steps:

[0038] 1) Use screws to securely connect the four-dimensional adjustable reticle fixture 2 to the product's right pitch axis 5 and lower position axis 6;

[0039] 2) placing the inner focusing light tube 1 on the five-dimensional adjustment stage 4, imaging the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture 2 within the field of view of the inner focusing light tube 1, rotating the rotary axis system, and obtaining the position deviation between the axis system rotary axis and the reticle center axis;

[0040] 3) continuously adjusting the five-dimensional adjustment stage 4 and the four-dimensional adjustable reticle fixture 2 based on the position deviation until the rotation axis of the shaft system approximately coincides with the central axis of the reticle;

[0041] 4) Use screws to securely connect the right pitch axis system 5 and the lower position axis system 6 to the airborne photoelectric detection device, and securely connect the pitch follower mirror 7 to the right pitch axis system 5;

[0042] 5) Adjust the spatial position of the inner focusing light tube 1 and the right pitch axis system 5, align the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture 2 on the right pitch axis system 5 with the cross center of the inner focusing light tube 1, remove the four-dimensional adjustable reticle fixture 2 on the right pitch axis system 5, and complete the establishment of the adjustment reference;

[0043] 6) adjusting the focal length of the inner focusing light tube 1 to form the self-collimation image and the differentiated image of the four-dimensional adjustable reticle tooling 2 on the lower axis system 6 within the field of view of the inner focusing light tube 1;

[0044] 7) Grind the mounting surface of the pitch follower mirror 7 or directly increase or decrease the thickness of the gasket between the pitch follower mirror 7 and the right pitch axis system 5 to ensure that the autocollimation image and differentiated image of the four-dimensional adjustable reticle tooling 2 on the lower position axis system 6 are aligned with the cross center of the internal focusing light tube 1, and the installation and adjustment of the pitch follower mirror 7 is completed.

[0045] In this embodiment, the adjustment method of step 3) is as follows: adjusting the azimuth and pitch knobs of the four-dimensional adjustable graticule fixture 2, adjusting the self-collimation image circle drawing amount of the four-dimensional adjustable graticule fixture 2 to less than 10", adjusting the x translation and y translation knobs of the four-dimensional adjustable graticule fixture 2, adjusting the self-collimation image circle drawing amount of the four-dimensional adjustable graticule fixture 2 to less than 0.03mm, adjusting the spatial position of the five-dimensional adjustment stage 4, and aligning the cross center of the internal focusing light tube 1 with the self-collimation image and the differentiated image of the four-dimensional adjustable graticule fixture 2 respectively.

[0046] In this embodiment, the method for establishing the adjustment reference in step 5) is as follows: adjusting the positions of the support platform 3 and the photoelectric detection device, imaging the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling 2 on the right pitch axis system 5 into the internal focusing light tube 1, adjusting the spatial position of the five-dimensional adjustment platform 4, and aligning the cross center of the internal focusing light tube 1 with the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling 2, respectively, with the autocollimation image overlap accuracy being less than 2", and the differentiated image overlap accuracy being less than 0.01 mm.

[0047] In this embodiment, in step 7), the method for aligning the auto-collimation image and the differentiated image of the four-dimensional adjustable reticle tooling 2 with the cross center of the inner focusing light tube 1 is as follows: rotating, grinding or beveling the mounting surface position of the pitch follower mirror 7, adjusting the auto-collimation image of the four-dimensional adjustable reticle tooling 2 on the lower azimuth axis system 6 to coincide with the cross center of the auto-collimation image of the inner focusing light tube 1, with an overlap accuracy of less than 15", increasing or decreasing the overall thickness of the shim at the mounting surface position of the pitch follower mirror 7, adjusting the differentiated image of the four-dimensional adjustable reticle tooling 2 on the lower azimuth axis system 6 to coincide with the cross center of the differentiated image of the inner focusing light tube 1, with an overlap accuracy of less than 0.05 mm.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A pitch-following mirror adjustment device, characterized in that: Includes internal focusing light tube, four-dimensional adjustable reticle fixture, support table and five-dimensional adjustment table; The support platform is used to place the photoelectric detection product including the shaft system and the pitch follower mirror; The four-dimensional adjustable reticle fixture is fixedly connected to the rotary axis system, and includes a reticle and four-dimensional adjustment mechanisms for azimuth, pitch, x-axis translation, and y-axis translation, which are used to calibrate the rotary axis of the rotary axis system; The five-dimensional adjustment platform is used to place an internal focusing light tube, which is used to observe the auto-collimation image and differentiated image of the four-dimensional adjustable reticle tooling; The optical axis of the inner focusing light tube is aligned with the center axis of the reticle of the four-dimensional adjustable reticle fixture, so as to establish an adjustment reference; The method for adjusting the pitch-following mirror adjustment device comprises the following specific steps: Step 1: Use screws to secure the two 4D adjustable reticle fixtures to the right pitch axis and the lower position axis of the product respectively. Step 2: Place the inner focusing light tube on a five-dimensional adjustment stage, image the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture within the field of view of the inner focusing light tube, rotate the rotary axis system, and obtain the position deviation between the axis system rotary axis and the reticle center axis; Step 3: Continuously adjusting the five-dimensional adjustment stage and the four-dimensional adjustable reticle fixture based on the position deviation until the rotation axis of the rotary axis system approximately coincides with the central axis of the reticle; Step 4: Use screws to securely connect the right pitch axis system, the lower position axis system, and the airborne photoelectric detection device, and securely connect the pitch follower mirror to the right pitch axis system; Step 5: Adjust the spatial position of the inner focusing light tube and the right pitch axis system, align the autocollimation image and differentiated image of the four-dimensional adjustable reticle fixture on the right pitch axis system with the cross center of the inner focusing light tube, remove the four-dimensional adjustable reticle fixture on the right pitch axis system, and complete the installation and adjustment reference establishment; Step 6: Adjust the focal length of the inner focusing light tube to form the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling on the lower axis system within the field of view of the inner focusing light tube; Step 7: Grind the mounting surface of the pitch follower mirror, or directly increase or decrease the thickness of the gasket between the pitch follower mirror and the right pitch axis system to ensure that the auto-collimation image and differentiated image of the four-dimensional adjustable reticle tooling on the lower axis system are aligned with the cross center of the internal focusing light tube, and the pitch follower mirror is installed and adjusted.

2. The pitch-following mirror adjustment device according to claim 1, characterized in that: The adjustment method in step 3 is to adjust the azimuth and pitch knobs of the four-dimensional adjustable reticle fixture, adjust the circle drawing amount of the autocollimation image of the four-dimensional adjustable reticle fixture to less than 10", adjust the x translation and y translation knobs of the four-dimensional adjustable reticle fixture, adjust the circle drawing amount of the reticle image of the four-dimensional adjustable reticle fixture to less than 0.03 mm, adjust the spatial position of the five-dimensional adjustment stage, and make the cross center of the internal focusing light tube coincide with the autocollimation image and the differentiated image of the four-dimensional adjustable reticle fixture respectively.

3. The pitch-following mirror adjustment device according to claim 1, characterized in that: The method for establishing the adjustment reference in step 5 is to adjust the positions of the support platform and the photoelectric detection device, image the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling on the right pitch axis system into the internal focusing light tube, adjust the spatial position of the five-dimensional adjustment platform, and make the cross center of the internal focusing light tube coincide with the autocollimation image and the differentiated image of the four-dimensional adjustable reticle tooling, respectively, with the autocollimation image coincidence accuracy being less than 2", and the differentiated image coincidence accuracy being less than 0.01 mm.

4. The pitch-following mirror adjustment device according to claim 1, characterized in that: In step 7, the method for aligning the auto-collimation image and the differentiated image of the four-dimensional adjustable reticle fixture with the cross center of the internal focusing light tube is as follows: rotating, grinding or beveling the mounting surface position of the pitch follower mirror, adjusting the auto-collimation image of the four-dimensional adjustable reticle fixture on the lower axis system to coincide with the cross center of the auto-collimation image of the internal focusing light tube, with an overlap accuracy of less than 15", increasing or decreasing the overall thickness of the shim at the mounting surface position of the pitch follower mirror, adjusting the differentiated image of the four-dimensional adjustable reticle fixture on the lower axis system to coincide with the cross center of the differentiated image of the internal focusing light tube, with an overlap accuracy of less than 0.05 mm.

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