Three-dimensional optical rapid fine adjustment locking structure

Abstract

The utility model discloses a three-dimensional optical rapid fine adjustment locking structure which comprises a mounting base, a lens assembly, an adjusting seat plate, a first adjusting assembly and a second adjusting assembly. The lens assembly is connected to the mounting base and then forms a light path with the through hole of the mounting base; the adjusting seat plate is connected to the mounting base, and the first adjusting assembly is connected with the lens assembly and the mounting base; the second adjusting assembly is connected with the adjusting seat plate and the lens assembly; the first adjusting assembly, the second adjusting assembly and the lens assembly are in contact connection through spherical surfaces. The beneficial effects of the utility model are that the optical lens can be accurately adjusted and locked in three dimensions of RX, RY and TZ, through the modular design of multiple groups of structures, the integration level of the optical system is improved, and the reliability of the designed optical system is expanded.

Description

Technical Field

[0001] The utility model relates to the field of optical machinery, in particular to multi-dimensional adjustment and locking. Background Art

[0002] In optical experimental systems or optoelectronic instruments and equipment, the positions of various optical lenses are often designed and arranged according to the requirements of optical path, machinery or product appearance. However, due to the particularity of the optical system, the positional accuracy requirements between the optical lenses are very high, and the comprehensive errors caused by design errors, structural component processing errors, and assembly errors are unavoidable. Therefore, each optical lens must be fine-tuned to meet the optical system design requirements.

[0003] When designing an optical system, the dimensions of optical lenses that often need to be fine-tuned include RX, RY, and TZ. The adjustment of these three dimensions can ensure that the optical axis is along the center of the optical lens and reflects or refracts at the designed angle. At present, the commonly used means of adjusting optical lenses is to use a mature optical adjustment frame. This type of optical adjustment frame consists of a base, a lens seat, fine-tuning screws, and a spring. The spring connects the base and the lens seat, and the fine-tuning of the two-dimensional angle is achieved by rotating the fine-tuning screws. After this type of optical adjustment frame has been used for a long time, the angle of the lens seat will change, and the position of the lens seat cannot be effectively fixed for a long time, causing the optical path to change. Especially when using optoelectronic instruments and equipment, due to the complexity and diversity of the use environment, regular fine-tuning is often required, which increases the use and maintenance cost of optoelectronic instruments and equipment and reduces the reliability of optoelectronic instruments and equipment. In addition, when designing optoelectronic instruments and equipment with high integration requirements, the use of this type of optical adjustment frame increases the difficulty of optical-mechanical structure design and reduces the integration of the equipment.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to solve the problems of difficult lens adjustment and locking, complex optical-mechanical integrated design, and low reliability in the current optical system.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A three-dimensional optical quick fine-tuning locking structure comprises a mounting base, a lens assembly, an adjustment seat plate, a first adjustment assembly, and a second adjustment assembly; the lens assembly is connected to the mounting base and forms an optical path with the through hole of the mounting base; the adjustment seat plate is connected to the mounting base, the first adjustment assembly connects the lens assembly and the mounting base; the second adjustment assembly connects the adjustment seat plate and the lens assembly; the first adjustment assembly, the second adjustment assembly and the lens assembly are all connected through spherical contact.

[0008] In the present invention, when the lens assembly needs to be adjusted, the Z-direction adjustment is that the first adjustment assembly and the second adjustment assembly are raised and lowered at the same time; for the RX direction angle adjustment, the first adjustment assembly and the second adjustment assembly symmetrical on both sides of the X axis can be raised and lowered at the same time, and the same is true for RY. This embodiment can quickly realize the precise adjustment and locking of the three dimensions of the optical lens RX, RY, and TZ. Through the modular design of multiple groups of structures, the integration of the optical system is improved, the reliability of the designed optical system is expanded, the debugging time of the optical system is reduced, and the frequency and cycle of system maintenance are reduced.

[0009] Preferably, the adjustment seat plate extends a plurality of evenly distributed connecting ears in the direction of the lens assembly, the connecting ears include adjustment connecting holes, and the second adjustment assembly connects the connecting ears and the lens assembly.

[0010] Preferably, the entire mounting base is a triangular prism structure, the front side of which is inclined, and the center of the front side has a circular notch, the center of the circular notch is used to mount the lens assembly, and the center of the circular notch forms an optical path with two vertical through holes on the rear side of the mounting base.

[0011] Preferably, the step surface of the circular groove includes four first mounting slots for connecting to the first adjustment component, and four second mounting slots for connecting to the second adjustment component, and the first mounting slots and the second mounting slots are spaced and evenly arranged; the outer inclined surface of the circular groove also includes four first mounting holes for connecting to the adjustment seat plate.

[0012] Preferably, the lens assembly comprises a lens seat, a lens, and a pressure ring; the lens seat is in a circular ring shape, the through hole in the middle of the lens seat is threadedly connected to the pressure ring, and the lens is screwed into the lens seat by the pressure ring to be compressed and fixed.

[0013] Preferably, the mirror seat includes a plurality of second bosses for connecting to the first adjustment component and a plurality of arc grooves connected to the second adjustment component along the circumferential direction, a first adjustment screw hole is opened in the middle of the second boss, and stress relief grooves are provided around the second boss and the arc groove.

[0014] Preferably, the first adjustment assembly includes a first spherical nut, a first adjusting screw, and a nut locking ring. The nut locking ring is connected to the first mounting slot. The bottom of the nut locking ring has a hemispherical groove hole. The hemispherical groove hole of the nut locking ring and the hemispherical groove hole of the first mounting slot form a space to limit the first spherical nut. The first adjusting screw passes through the mirror seat and the nut locking ring in sequence and is connected to the first spherical nut.

[0015] Preferably, the cylindrical threaded hole at the top of the first mounting slot is connected to the external thread of the nut locking ring, the arc-shaped or hemispherical groove in the middle of the first mounting slot accommodates the bottom of the first spherical nut, the lower part of the first mounting slot is a square hole, the bottom of the first spherical nut is a square column, and the direction column is limited in the square hole of the first mounting slot.

[0016] Preferably, the second adjustment assembly includes a second spherical nut and a second adjustment screw. The arc groove of the lens assembly is aligned with the arc groove of the second mounting slot to form a space to limit the second spherical nut. The second adjustment screw passes through the adjustment seat plate and is connected to the second spherical nut.

[0017] Preferably, the first adjusting screw of the first adjusting assembly and the second adjusting screw of the second adjusting assembly are fine-pitch screws with a pitch of 0.35-0.5.

[0018] The advantages of the utility model are:

[0019] In the present invention, when the lens assembly needs to be adjusted, the Z-direction adjustment is that the first adjustment assembly and the second adjustment assembly are raised and lowered at the same time; for the RX direction angle adjustment, the first adjustment assembly and the second adjustment assembly symmetrical on both sides of the X axis can be raised and lowered at the same time, and the same is true for RY. This embodiment can quickly realize the precise adjustment and locking of the three dimensions of the optical lens RX, RY, and TZ. By using the design form of this structure, the complexity of the optical machine design is reduced, the integration of the optical system is improved, the reliability of the designed optical system is expanded, the debugging time of the optical system is reduced, and the frequency and cycle of system maintenance are reduced;

[0020] The ball nut rotates with the adjustment angle, and the adjustment screw can always fit the installation surface, reducing the stress and strain caused by uneven force in assembly;

[0021] Through the coordinated operation of the two sets of screws, the calibration and locking of the optical path angle difference or the overall offset caused by assembly error, part processing error, etc. during the assembly and debugging of the optical system can be quickly completed. In addition, the ball nut and the stress-relieving process notch can avoid the strain deformation of the lens mount caused by assembly, temperature change or mechanical vibration.

[0022] It is suitable for laboratory optical experimental systems, optoelectronic instruments and equipment used in harsh mechanical environments, etc. The mounting base 1 can also be optimized in a timely manner to expand the adjustment dimension according to the overall needs of the optical-mechanical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the three-dimensional optical fast fine-tuning locking structure of the embodiment of the utility model;

[0024] Figure 2 This is an exploded schematic diagram of a three-dimensional optical fast fine-tuning locking structure according to an embodiment of the utility model;

[0025] Figure 3 This is a front view of the three-dimensional optical fast fine-tuning locking structure of the embodiment of the utility model;

[0026] Figure 4 yes Figure 3 A cutaway stereogram at the middle BB;

[0027] Figure 5 yes Figure 3 The cutaway stereogram at AA in the middle;

[0028] Figure 6 It is a structural schematic diagram of the installation base of the embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the mounting base of the embodiment of the utility model from other viewing angles;

[0030] Figure 8 It is a top view (vertical to the top surface direction) of the mounting base of the embodiment of the utility model;

[0031] Fig. 9 yes Figure 8 Sectional view at CC;

[0032] Fig.10 It is a structural schematic diagram of the lens assembly of an embodiment of the utility model;

[0033] Fig.11 It is a bottom perspective schematic diagram of the mirror holder of the utility model;

[0034] Fig.12 This is a schematic diagram of the structure of the adjustable seat plate of the utility model embodiment;

[0035] Numbers in the figure:

[0036] 1. Mounting base; 11. Through hole; 12. First mounting slot; 121. First boss; 13. Second mounting slot; 14. First mounting hole;

[0037] 2. lens assembly; 21. lens seat; 211. second boss; 212. arc groove; 213. stress relief groove; 214. first adjustment screw hole; 22. lens; 23. pressure ring;

[0038] 3. Adjust the seat plate; 31. Connect the lugs; 32. Adjust the connecting holes;

[0039] 4. first adjustment assembly; 41. first spherical nut; 42. first adjustment screw; 43. nut lock ring;

[0040] 5. Second adjustment assembly; 51. Second ball nut; 52. Second adjustment screw. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] like Figure 1 , Figure 2 As shown, a three-dimensional optical quick fine-tuning locking structure comprises a mounting base 1, a lens assembly 2, an adjustment seat plate 3, a first adjustment assembly 4, and a second adjustment assembly 5; the lens assembly 2 is connected to the mounting base 1 and forms an optical path with the through hole 11 of the mounting base 1; the adjustment seat plate 3 is connected to the mounting base 1, and the adjustment seat plate 3 extends a plurality of evenly distributed connecting ears 31 in the direction of the lens assembly 2; the first adjustment assembly 4 is used to connect the lens assembly 2 and the mounting base 1, so that the lens seat 21 can be pressed inward; the second adjustment assembly 5 is used to connect the connecting ears 31 and the lens assembly 2, so that the lens seat 21 can be tightened outward, and the fine-tuning locking of the lens seat 21 is achieved by pulling with four first adjustment assemblies 4 and pressing with four first adjustment assemblies 4; the first adjustment assembly 4, the second adjustment assembly 5 and the lens assembly 2 are all connected with each other through spherical contact.

[0043] Specifically, Figure 6 , Figure 7 As shown, the mounting base 1 is in a triangular prism structure, the front side of which is inclined, and the center of the front side has a circular notch, the center of which is where the lens assembly 2 is mounted, and the center of the circular notch is aligned with the center of the circular notch. Figure 7The two vertical through holes 11 on the rear side form an optical path. The stepped surface of the circular notch includes four first mounting slots 12 for connecting with the first adjustment component 4, and four second mounting slots 13 for connecting with the second adjustment component 5. The first mounting slots 12 and the second mounting slots 13 are spaced and evenly arranged. The outer inclined surface of the circular notch includes four first mounting holes 14 for connecting with the adjustment seat plate 3. The first mounting holes 14 are threaded holes. The adjustment seat plate 3 is fastened by screwing the seat plate bolts into the first mounting holes 14.

[0044] refer to Figure 8 ,like Fig. 9 The first installation slot 12 shown can be regarded as a three-section structure, the leftmost section is a threaded column, the middle section is an arc groove, and the rightmost section is a square hole; and as shown in FIG. Figure 6 As shown, the first installation slot 12 has a first boss 121, as shown in FIG. Fig. 9 As shown, the second installation slot 13 is a two-section structure, the left section is an arc groove, and the right section is a square hole.

[0045] like Fig.10 , Fig.11 As shown, the lens assembly 2 includes a lens seat 21, a lens 22, and a pressure ring 23; the lens seat 21 is annular, the lens seat 21 is provided with a thread inside, and the pressure ring 23 is provided with a thread outside, and the lens 22 is screwed into the lens seat 21 by the pressure ring 23 to achieve compression and fixation. Among them, the contact surface of the lens seat 21 for mounting the lens 22 needs to be processed according to the requirements for mounting the lens 22, and meet the requirements of flatness, roughness, etc. required by the design. The pressure ring 23 is also provided with locking through holes around it, which can further lock the lens 22. The lens seat 21 is also provided with a structure that is compatible with the first adjustment component 4 and the second adjustment component 5. In this embodiment, the bottom of the lens seat 21 includes a second boss 211 that is compatible with the first adjustment component 4, and an arc groove 212 that is compatible with the second adjustment component 5. The middle part of the second boss 211 is also provided with a first adjustment screw hole 214. At the same time, both the second boss 211 and the arc groove 212 are provided with stress relief grooves 213 around their peripheries, and the stress relief grooves 213 are U-shaped.

[0046] like Fig.12 As shown, the adjustment seat plate 3 is a rectangular plate with a through hole in the middle, and four connecting ears 31 extend from the through hole to the center. The connecting ears 31 include an adjustment connecting hole 32 , and the adjustment connecting hole 32 is connected to the second adjustment component 5 .

[0047] like Figure 4 , Figure 5As shown, the first adjustment component 4 includes a first spherical nut 41, a first adjustment screw 42, and a nut lock ring 43. The nut lock ring 43 is cylindrical, and has a hemispherical groove hole at the bottom. The hemispherical groove hole contacts and fits with the top of the first spherical nut 41. The hemispherical groove hole of the nut lock ring 43 fits with the first mounting slot 12 of the mounting base 1, and can form a space to limit the first spherical nut 41. The inner diameter of the space is slightly larger than the outer diameter of the first spherical nut 41. The diameter of the nut lock ring and the lens seat screw through hole can be designed according to the requirements of the fine-tuning angle range. The upper part of the first mounting slot 12 is a cylindrical threaded hole, the middle part is an arc-shaped or hemispherical groove hole, and the bottom is a square hole. The cylindrical threaded hole at the upper part can be connected with the external thread of the nut lock ring 43, and the arc-shaped or hemispherical groove in the middle part can accommodate the bottom of the first spherical nut 41. The bottom of the first spherical nut 41 is also a square column structure, which can be inserted into the square hole of the first mounting slot 12.

[0048] It should be noted that: the outer diameter of the first spherical nut 41 is slightly smaller than the inner diameter of the hemispherical groove hole, so that the first spherical nut 41 can rotate freely during adjustment and installation; the square column size at the bottom of the first spherical nut 41 is smaller than the square hole of the first installation slot 12. The size difference between the two can make the rotation angle of the first spherical nut 41 meet the adjustment angle requirement, and can also limit the first spherical nut 41 from rotating when the first adjusting screw 42 is tightened. The surface of the first spherical nut 41 and the hemispherical concave groove hole are roughened to increase friction during tightening.

[0049] When the nut locking ring 43 is screwed into the cylindrical threaded hole at the top of the first mounting slot 12, the first spherical nut 41 is gradually limited between the nut locking ring 43 and the first mounting slot 12, and the second boss 211 is aligned with the first boss 121 in the Z direction. The first adjusting screw 42 passes through the first adjusting screw hole 214 of the mirror holder 21 and the nut locking ring 43 in sequence, and finally connects with the first spherical nut 41. The first spherical nut 41 is locked in the upper and lower hemispherical concave slots (the two hemispherical concave slots form a roughly spherical space) by the nut locking ring 43. After the nut locking ring 43 is locked, the first spherical nut 41 is subjected to force in the spherical space, but can be rotated, but the rotation angle is limited by the size of the square hole at the bottom of the hemispherical concave slot and the square column at the bottom of the first spherical nut 41; the nut locking ring 43 can be prevented from loosening by anti-loosening glue.

[0050] like Figure 4 , Figure 5As shown, the second adjustment component 5 includes a second spherical nut 51 and a second adjustment screw 52. The arc groove 212 is aligned with the arc groove of the second mounting slot 13 to form a space to limit the second spherical nut 51. The arc groove 212 contacts the top of the second spherical nut 51, and the second mounting slot 13 contacts the bottom of the second spherical nut 51. The second adjustment screw 52 passes through the adjustment connecting hole 32 on the connecting ear 31 and is screwed into the second spherical nut 51.

[0051] The structure of the second spherical nut 51 is similar to that of the first spherical nut 41 . Similarly, the square column at the bottom of the second spherical nut 51 is inserted into the square hole at the bottom of the second installation slot 13 to form a limit.

[0052] The second adjusting screw 52 can be fixed to the second spherical nut 51 through the adjusting connecting hole 32 of the adjusting seat plate 3; the threaded hole in the second spherical nut 51 will not deviate to other directions to cause the second adjusting screw 52 to misalign.

[0053] The first adjusting screw 42 and the second adjusting screw 52 are precision fine-pitch screws to meet the fine-tuning requirements. Specifically, fine-pitch screws with a pitch of 0.35 or 0.5 can be selected.

[0054] refer to Figure 1 As shown, when the lens assembly 2 needs to be adjusted, the Z direction is the axis direction of the lens holder 21, and the X and Y directions are in the vertical plane of the Z direction. The Z direction adjustment is that the first adjustment screw 42 and the second adjustment screw 52 are raised and lowered at the same time. For example, for RX direction angle adjustment, the first adjustment screw 42 or the second adjustment screw 52 symmetrical on both sides of the X axis can be raised and lowered at the same time, and the same applies to RY.

[0055] This embodiment can quickly realize the precise adjustment and locking of the three dimensions of the optical lens RX, RY, and TZ. By using the design form of this structure, the complexity of the optical-mechanical design is reduced, the integration of the optical system is improved, the reliability of the designed optical system is expanded, the debugging time of the optical system is reduced, and the frequency and cycle of system maintenance are reduced. It is suitable for laboratory optical experimental systems, optoelectronic instruments and equipment used in harsh mechanical environments, etc. According to the overall needs of the optical-mechanical system, the mounting base 1 can be optimized in time to expand the adjustment dimension.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Three-dimensional optical fast fine-tuning locking structure, characterized in that: It includes a mounting base, a lens assembly, an adjustment seat plate, a first adjustment assembly, and a second adjustment assembly; the lens assembly is connected to the mounting base and forms an optical path with the through hole of the mounting base; the adjustment seat plate is connected to the mounting base, and the first adjustment assembly connects the lens assembly and the mounting base; the second adjustment assembly connects the adjustment seat plate and the lens assembly; the first adjustment assembly, the second adjustment assembly and the lens assembly are all connected through spherical contact.

2. The three-dimensional optical fast fine-tuning locking structure according to claim 1, characterized in that: The adjustment seat plate extends a plurality of evenly distributed connection ears in the direction of the lens assembly, the connection ears include adjustment connection holes, and the second adjustment assembly connects the connection ears and the lens assembly.

3. The three-dimensional optical fast fine-tuning locking structure according to claim 1, characterized in that: The mounting base is in the form of a triangular prism structure, with an inclined front side and a circular notch at the center of the front side. The lens assembly is mounted at the center of the circular notch, and the center of the circular notch forms an optical path with two vertical through holes on the rear side of the mounting base.

4. The three-dimensional optical fast fine-tuning locking structure according to claim 3, characterized in that: The step surface of the circular groove includes four first mounting slots for connecting to the first adjustment component and four second mounting slots for connecting to the second adjustment component, and the first mounting slots and the second mounting slots are spaced and evenly arranged; the outer inclined surface of the circular groove also includes four first mounting holes for connecting to the adjustment seat plate.

5. The three-dimensional optical fast fine-tuning locking structure according to claim 1, characterized in that: The lens assembly comprises a lens seat, a lens and a pressing ring; the lens seat is in a circular ring shape, a through hole in the middle of the lens seat is threadedly connected with the pressing ring, and the lens is screwed into the lens seat by the pressing ring to be pressed and fixed.

6. The three-dimensional optical fast fine-tuning locking structure according to claim 5, characterized in that: The mirror seat includes a plurality of second bosses connected to the first adjustment component and a plurality of arc grooves connected to the second adjustment component along the circumferential direction, a first adjustment screw hole is provided in the middle of the second boss, and stress relief grooves are provided around the second boss and the arc groove.

7. The three-dimensional optical fast fine-tuning locking structure according to claim 4, characterized in that: The first adjustment component includes a first spherical nut, a first adjustment screw, and a nut locking ring. The nut locking ring is connected to the first mounting slot. The bottom of the nut locking ring has a hemispherical groove hole. The hemispherical groove hole of the nut locking ring and the hemispherical groove hole of the first mounting slot form a space to limit the first spherical nut. The first adjustment screw passes through the mirror seat and the nut locking ring in sequence and is connected to the first spherical nut.

8. The three-dimensional optical fast fine-tuning locking structure according to claim 7, characterized in that: The cylindrical threaded hole at the top of the first mounting slot is connected to the external thread of the nut locking ring, the arc-shaped or hemispherical groove in the middle of the first mounting slot accommodates the bottom of the first spherical nut, the lower part of the first mounting slot is a square hole, the bottom of the first spherical nut is a square column, and the direction column is limited in the square hole of the first mounting slot.

9. The three-dimensional optical fast fine-tuning locking structure according to claim 4, characterized in that: The second adjustment assembly includes a second spherical nut and a second adjustment screw. The arc groove of the lens assembly is aligned with the arc groove of the second mounting slot to form a space to limit the second spherical nut. The second adjustment screw passes through the adjustment seat plate and is connected to the second spherical nut.

10. The three-dimensional optical fast fine-tuning locking structure according to claim 1, characterized in that: The first adjusting screw of the first adjusting assembly and the second adjusting screw of the second adjusting assembly are fine-pitch screws with a pitch of 0.35-0.5.

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