Optical lens structure and optical device
By independently adjusting the concentricity and focal length of the lens and collimator in the optical lens structure, the problem of insufficient concentricity adjustment in the prior art is solved, and the detection accuracy of the lidar telescope is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING METABTAR RADAR
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-21
AI Technical Summary
The existing adjustment structure of lidar telescopes cannot effectively adjust concentricity, resulting in lens deviations caused by machining errors of mechanical parts and human errors, which affects detection accuracy.
An optical lens structure is provided, which enables independent adjustment of concentricity and focal length by adjusting the positions of the lens and collimator along the optical axis and perpendicular to the optical axis, thereby eliminating concentricity deviation caused by mechanical parts and human error.
This improved the system's receiving efficiency and detection accuracy, eliminated concentricity deviations between lenses, and enhanced system accuracy during assembly and adjustment.
Smart Images
Figure CN224536248U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of telescope technology, and in particular to an optical lens structure and optical device. Background Technology
[0002] Most existing lidar telescopes only adjust the axial direction to change the system's focal length, relying solely on mechanical means to ensure system concentricity, which cannot be adjusted. During assembly and adjustment, due to machining errors in mechanical parts and human error, concentricity deviations between lenses are inevitable, leading to decreased system receiving efficiency and affecting detection accuracy. Utility Model Content
[0003] The first objective of this invention is to provide an optical lens structure that enables concentricity adjustment during assembly and adjustment, thereby improving detection accuracy.
[0004] The second objective of this invention is to provide an optical device employing the aforementioned optical lens structure.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] In a first aspect, this application provides an optical lens structure, including a first lens mounting assembly, a second lens mounting assembly, and a collimator mounting assembly arranged sequentially along the optical axis. The second lens mounting assembly is adjustablely disposed on the first lens mounting assembly along the optical axis and perpendicular to the optical axis, and the collimator mounting assembly is adjustablely disposed on the second lens mounting assembly along the direction perpendicular to the optical axis.
[0007] In one possible implementation, the first lens mounting assembly includes a first lens barrel and at least one set of first lens fixing assemblies. The first lens fixing assembly includes a first lens retaining ring and a first elastic washer. The inner wall of the first lens barrel is provided with a first annular stepped surface and a first threaded structure that correspond one-to-one with the first lens fixing assembly. The first lens retaining ring is threadedly engaged with the first threaded structure, and the lens is pressed and fixed to the first annular stepped surface by the first elastic washer.
[0008] In one possible implementation, the first lens mounting assembly includes multiple sets of the first lens fixing assemblies, and multiple first annular stepped surfaces are arranged in a stepped manner along the optical axis.
[0009] In one possible implementation, an annular flange is provided on the outer wall of the first lens barrel.
[0010] In one possible implementation, the second lens mounting assembly includes a second lens barrel, a connector, and at least one set of second lens fixing assemblies. The second lens fixing assembly includes a second lens retaining ring and a second elastic washer. The inner wall of the second lens barrel is provided with a second annular stepped surface and a second threaded structure that correspond one-to-one with the second lens fixing assembly. The second lens retaining ring is threadedly engaged with the second threaded structure, and the lens is pressed and fixed to the second annular stepped surface by the second elastic washer. The connector has a light-transmitting structure that does not obstruct the optical path of the optical lens structure.
[0011] The connector is adjustablely positioned on the first lens barrel along a direction perpendicular to the optical axis, and the second lens barrel is adjustablely positioned on the connector along the optical axis.
[0012] In one possible implementation, the connector includes a main body and a first connecting portion and a second connecting portion disposed on the main body. The first connecting portion is connected to the first lens barrel by a first fastener. The first connecting portion is provided with a first mounting hole that mates with the first fastener. The first fastener passes through the first mounting hole to press and fix the connector to the first lens barrel. A first adjustment gap is formed between the first fastener and the first mounting hole so that the position of the connector relative to the first lens barrel is adjustable in a direction perpendicular to the optical axis.
[0013] The second connecting part is provided with a first sleeve having a third thread structure, and the second lens barrel is provided with a second sleeve having a fourth thread structure. The third thread structure and the fourth thread structure are threadedly engaged so that the position of the second lens barrel relative to the connecting part is adjustable along the optical axis.
[0014] In one possible implementation, the first connecting portion includes a plurality of connecting blocks arranged circumferentially at intervals, the connecting blocks being located on the side of the main body portion facing the first lens barrel, and the first lens barrel, the main body portion, and two adjacent connecting blocks forming a second adjustment gap for at least partially exposing the second lens barrel.
[0015] In one possible implementation, the second lens barrel is provided with an adjustment hole corresponding to the position of the second adjustment gap. The adjustment hole is used to cooperate with a lever extending from outside the optical lens structure through the second adjustment gap to drive the second lens barrel to rotate relative to the connector.
[0016] In one possible implementation, the second lens barrel is provided with a locking assembly, the locking assembly including a locking bracket and a first locking member. The locking bracket includes a base and a support portion. The base is disposed on the second lens barrel. A first end of the support portion is connected to the base, and a second end extends from the second adjustment gap and extends toward the connector. The first locking member is threadedly engaged with a first locking threaded hole at the second end of the support portion to press against the connector and lock the second lens barrel relative to the connector and the first lens barrel.
[0017] In one possible implementation, the second connecting portion is provided with a first annular groove, and the inner or outer groove wall of the first annular groove is provided with the third thread structure, and / or, the second lens barrel is provided with a second annular groove, and the inner or outer groove wall of the second annular groove is provided with the fourth thread structure.
[0018] In one possible implementation, the side of the main body away from the first lens barrel is connected to the collimator mounting assembly via a second fastener. The collimator mounting assembly is provided with a second mounting hole. The second fastener passes through the second mounting hole to press and fix the collimator mounting assembly to the main body. A second adjustment gap is formed between the second fastener and the second mounting hole, so that the position of the collimator mounting assembly relative to the main body is adjustable in a direction perpendicular to the optical axis.
[0019] In one possible implementation, the collimator mounting assembly includes a mounting base and a second locking member. The mounting base has a mounting hole and a second locking threaded hole. The mounting hole extends through the mounting base along the optical axis. The mounting base is used to be sleeved on the collimator through the mounting hole. The second locking threaded hole communicates with the mounting hole and the axis of the second locking threaded hole intersects the axis of the mounting hole. The second locking member is threadedly engaged with the second locking threaded hole so that the end of the second locking member extends into the mounting hole and presses against and locks the collimator.
[0020] As can be seen from the above technical solutions, the optical lens structure provided by this utility model includes a first lens mounting assembly, a second lens mounting assembly, and a collimator mounting assembly arranged sequentially along the optical axis. The first lens mounting assembly is used to mount a first lens group, which is composed of one or more first lenses arranged at intervals along the optical axis. The second lens mounting assembly is used to mount a second lens group, which is composed of one or more second lenses arranged at intervals along the optical axis. The collimator mounting assembly is used to mount a collimator. The second lens mounting assembly is adjustablely positioned on the first lens mounting assembly along the optical axis and perpendicular to the optical axis. The collimator mounting assembly is adjustablely positioned on the second lens mounting assembly along the direction perpendicular to the optical axis.
[0021] In the application of the above-mentioned optical lens structure, concentricity is adjusted first, and then focal length is adjusted. This avoids the problem of focal length changing again when adjusting concentricity after adjusting focal length. During assembly and adjustment, the position of the second lens mounting assembly relative to the first lens mounting assembly is adjusted along the direction perpendicular to the optical axis, and the position of the collimator mounting assembly relative to the first or second lens mounting assembly is adjusted along the direction perpendicular to the optical axis. This achieves the adjustment of the concentricity of the first lens group, the second lens group, and the collimator, eliminating concentricity deviations among the three. After the concentricity adjustment is completed, the focal length is adjusted by adjusting the position of the second lens mounting assembly relative to the first lens mounting assembly along the optical axis.
[0022] It is evident that the aforementioned optical lens structure can adjust the focal length and concentricity during the assembly and adjustment process, thereby eliminating the problem of concentricity deviation between the lens and collimator caused by machining errors of mechanical parts and human errors, thus improving the system's receiving efficiency and enhancing detection accuracy.
[0023] A second aspect of this application provides an optical device whose lens employs the optical lens structure described in the first aspect of this application and its possible implementations.
[0024] In one possible implementation, the optical device is a lidar telescope.
[0025] The optical device provided by this utility model has the above-mentioned optical lens structure, and therefore has all the technical effects of the above-mentioned optical lens structure, which will not be repeated here. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 A front view of the optical lens structure provided in an embodiment of this utility model;
[0028] Figure 2 An exploded view of the optical lens structure provided in an embodiment of this utility model;
[0029] Figure 3 for Figure 1 Sectional view along direction A in the middle;
[0030] Figure 4 A cross-sectional view of the first lens barrel of the optical lens structure provided in an embodiment of this utility model;
[0031] Figure 5 A cross-sectional view of the second lens barrel of the optical lens structure provided in an embodiment of this utility model;
[0032] Figure 6 A cross-sectional view of the connector of the optical lens structure provided in an embodiment of this utility model.
[0033] In the picture:
[0034] 100 is the first lens mounting assembly; 110 is the first lens barrel; 110a is the first annular stepped surface; 110b is the first threaded structure; 110c is the first fastening threaded hole; 120 is the first lens fixing assembly; 121 is the first lens pressure ring; 122 is the first elastic washer; 130 is the annular flange; 130a is the connecting through hole;
[0035] 200 is the second lens mounting assembly; 210 is the second lens barrel; 210a is the second annular stepped surface; 210b is the second threaded structure; 210c is the adjustment hole; 210d is the second annular groove; 210e is the fourth threaded structure; 220 is the connector; 221 is the main body; 221a is the second fastening threaded hole; 222 is the first connecting part; 223 is the second connecting part; 223a is the third threaded structure; 230 is the second lens fixing assembly; 231 is the second lens pressure ring; 232 is the second elastic washer; 240 is the locking bracket; 240a is the first locking threaded hole; 250 is the first locking element;
[0036] 300 is the fixed base; 300a is the second mounting hole; 300b is the second locking threaded hole;
[0037] 400 is a collimator;
[0038] 500 is the first lens; 600 is the second lens. Detailed Implementation
[0039] One of the core features of this invention is to provide an optical lens structure whose structural design enables concentricity adjustment during assembly and adjustment, thereby improving detection accuracy.
[0040] Another core aspect of this invention is to provide an optical device employing the aforementioned optical lens structure.
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0042] An optical lens structure is disclosed in this embodiment of the utility model. Please refer to [link / reference]. Figures 1 to 3 The optical lens structure includes a first lens mounting assembly 100, a second lens mounting assembly 200, and a collimator mounting assembly arranged sequentially along the optical axis. The optical axis refers to the axis of symmetry of the optical system. The optical lens structure in this application is arranged symmetrically or substantially symmetrically about the optical axis.
[0043] The first lens mounting assembly 100 is used to mount the first lens group. The first lens group consists of one or more first lenses 500 arranged at intervals along the optical axis. When the first lens group includes multiple first lenses 500, the focal length, refractive index, radius of curvature, diameter and center thickness of each first lens 500 may be the same or different.
[0044] The second lens mounting assembly 200 is used to mount the second lens group, which consists of one or more second lenses 600 arranged at intervals along the optical axis. When the second lens group includes multiple second lenses 600, the focal length, refractive index, radius of curvature, diameter and center thickness of each second lens 600 may be the same or different.
[0045] The collimator mounting assembly is used to mount the collimator 400. In order to achieve concentricity adjustment of the first lens group, the second lens group, and the collimator 400, in this application, the second lens mounting assembly 200 is adjustablely disposed on the first lens mounting assembly 100 along the optical axis and perpendicular to the optical axis. Adjusting the position of the second lens mounting assembly 200 along the optical axis can adjust the relative position of the second lens group, the first lens group, and the collimator 400 in the optical axis direction, thereby achieving focal length adjustment. Adjusting the position of the second lens mounting assembly 200 perpendicular to the optical axis can adjust the concentricity of the first lens group and the second lens group. The collimator mounting assembly is adjustablely disposed on the second lens mounting assembly 200 along the perpendicular to the optical axis to adjust the concentricity of the collimator 400 relative to the first lens group or the second lens group.
[0046] In the application of the above-mentioned optical lens structure, concentricity is adjusted first, and then focal length is adjusted to avoid the problem of focal length changing again when adjusting concentricity after adjusting focal length. During assembly and adjustment, the position of the second lens mounting assembly 200 relative to the first lens mounting assembly 100 is adjusted along the direction perpendicular to the optical axis, and the position of the collimator mounting assembly relative to the first lens mounting assembly 100 or the second lens mounting assembly 200 is adjusted along the direction perpendicular to the optical axis. This achieves the adjustment of the concentricity of the first lens group, the second lens group, and the collimator 400, eliminating the concentricity deviation among the three. After the concentricity adjustment is completed, the focal length is adjusted by adjusting the position of the second lens mounting assembly 200 relative to the first lens mounting assembly 100 along the optical axis.
[0047] Compared with the prior art, the optical lens structure provided in this application embodiment can adjust the focal length and concentricity during the assembly and adjustment process, which can eliminate the problem of concentricity deviation between the lens and collimator 400 caused by machining errors of mechanical parts and human errors, thereby improving the system receiving efficiency and enhancing the detection accuracy.
[0048] Please see Figure 3 and Figure 4 The first lens mounting assembly 100 includes a first lens barrel 110 and at least one set of first lens fixing assemblies 120. The first lens barrel 110 is cylindrical and extends along the optical axis. The first lens fixing assembly 120 includes a first lens retaining ring 121 and a first elastic washer 122. The inner wall of the first lens barrel 110 is provided with a first annular step surface 110a and a first threaded structure 110b corresponding to the first lens fixing assembly 120. The outer edge of the first annular step surface 110a is connected to a first circumferential ring wall. The first threaded structure 110b is disposed on the first circumferential ring wall. The first annular step surface 110a faces the first threaded structure 110b and is spaced apart from the first threaded structure 110b to leave space between the first annular step surface 110a and the first threaded structure 110b for placing the first lens 500 and the first elastic washer 122.
[0049] During assembly, the first lens retaining ring 121 is threadedly engaged with the first threaded structure 110b, and the lens is pressed and fixed to the first annular step surface 110a by the first elastic washer 122. That is, when installing the first lens 500, the first lens 500 is first placed on the first annular step surface 110a, then the first elastic washer 122 is placed on the first lens 500, and finally the first lens retaining ring 121 is threadedly engaged with the first threaded structure 110b, so that the first lens retaining ring 121 presses the first elastic washer 122 on the first lens 500.
[0050] The first elastic washer 122 can undergo elastic deformation when squeezed by the first lens retainer 121 and the first lens 500. Therefore, it can evenly distribute the pressure exerted by the first lens retainer 121 on the first lens 500, effectively avoiding lens deformation, edge chipping and other problems caused by the first lens retainer 121 making hard contact with the first lens 500. At the same time, the first elastic washer 122 can absorb the dimensional changes caused by the different coefficients of thermal expansion, providing a certain buffer space to prevent the first lens 500 from being damaged or its performance from degrading due to thermal stress, and extending the service life of the first lens 500.
[0051] It is foreseeable that the first lens group is typically composed of multiple first lenses. Therefore, the first lens mounting assembly 100 includes multiple sets of first lens fixing assemblies 120, and multiple first annular step surfaces 110a are arranged in a stepped manner along the optical axis. The diameter of each first annular step surface 110a decreases sequentially from the one furthest from the second lens mounting assembly 200. That is, the inner diameter of the one of two adjacent first annular step surfaces 110a furthest from the second lens mounting assembly 200 is greater than or equal to the outer diameter of the one closest to the second lens mounting assembly 200, so as to facilitate the placement of each first lens 500. Correspondingly, the diameter of the first circumferential ring wall connected to the outer edge of each first annular step surface 110a also decreases sequentially as it shrinks from the second lens mounting assembly 200.
[0052] like Figure 3 As shown, in this embodiment, the first lens group consists of two first lenses 500. Correspondingly, the first lens mounting assembly 100 includes two sets of first lens fixing assemblies 120. The inner wall of the first lens barrel 110 is provided with two sets of first annular stepped surfaces 110a and a first threaded structure 110b.
[0053] To facilitate the integration of optical lens structures into optical systems, such as Figure 3 and Figure 4 As shown, an annular flange 130 is provided on the outer wall of the first lens barrel 110. A connecting through hole 130a is provided on the annular flange 130, which extends through the annular flange 130 along the thickness direction. Multiple connecting through holes 130a are evenly distributed around the annular flange 130. The connecting through holes 130a are used to cooperate with fasteners such as bolts to fix the optical lens structure to the optical system.
[0054] Please see Figure 3 and Figure 5 The second lens mounting assembly 200 includes a second lens barrel 210, a connector 220, and at least one set of second lens fixing assemblies 230. The second lens barrel 210 is cylindrical and extends along the optical axis. The second lens fixing assembly 230 includes a second lens retaining ring 231 and a second elastic washer 232. The inner wall of the second lens barrel 210 is provided with a second annular step surface 210a and a second threaded structure 210b that correspond one-to-one with the second lens fixing assembly 230. The outer edge of the second annular step surface 210a is connected to a second circumferential ring wall. The second threaded structure 210b is disposed on the second circumferential ring wall. The second annular step surface 210a faces the second threaded structure 210b and is spaced apart from the second threaded structure 210b to leave space between the second annular step surface 210a and the second threaded structure 210b for placing the second lens 600 and the second elastic washer 232.
[0055] During assembly, the second lens retaining ring 231 engages with the second threaded structure 210b and the second elastic washer 232 presses and fixes the second lens 600 onto the second annular step surface 210a. That is, when installing the second lens 600, the second lens 600 is first placed on the second annular step surface 210a, then the second elastic washer 232 is placed on the second lens 600, and finally the second lens retaining ring 231 engages with the second threaded structure 210b, so that the second lens retaining ring 231 presses the second elastic washer 232 onto the second lens 600.
[0056] exist Figure 3 and Figure 5 In the embodiment shown, the second lens group includes only one second lens 600, that is, the second lens barrel 210 is provided with only one set of second annular step surface 210a and second thread structure 210b. Of course, the second lens group may also include multiple second lenses 600. When the second lens group includes multiple second lenses 600, the second lens mounting assembly 200 includes multiple sets of second lens fixing assemblies 230, and multiple second annular step surfaces 210a are arranged in a stepped manner along the optical axis direction.
[0057] Please see Figure 6 The connector 220 is used to connect the second lens barrel 210 to the first lens barrel 110. The connector 220 has a light-transmitting structure that does not obstruct the optical path of the optical lens structure. The connector 220 is adjustablely positioned on the first lens barrel 110 along the optical axis direction, and the second lens barrel 210 is adjustablely positioned on the connector 220 along the direction perpendicular to the optical axis direction. Alternatively, the connector 220 is adjustablely positioned on the first lens barrel 110 along the direction perpendicular to the optical axis direction, and the second lens barrel 210 is adjustablely positioned on the connector 220 along the optical axis direction.
[0058] In this application, the second arrangement is adopted, that is, the connector 220 is adjustablely positioned on the first lens barrel 110 along the direction perpendicular to the optical axis, and the second lens barrel 210 is adjustablely positioned on the connector 220 along the optical axis. Please refer to the following. Figure 6 The connector 220 includes a main body 221 and a first connecting part 222 and a second connecting part 223 disposed on the main body 221. The first connecting part 222 is connected to the first lens barrel 110 by a first fastener. The first connecting part 222 is provided with a first mounting hole that mates with the first fastener. The first fastener passes through the first mounting hole to press and fix the connector 220 to the first lens barrel 110. A first adjustment gap is formed between the first fastener and the first mounting hole so that the position of the connector 220 relative to the first lens barrel 110 is adjustable in a direction perpendicular to the optical axis.
[0059] The first fastener can adopt various structures. In one specific embodiment, the first fastener is a first fastening bolt. Correspondingly, the first lens barrel 110 is provided with a first fastening threaded hole 110c that is adapted to the first fastening bolt. During assembly, the first fastening bolt passes through the first mounting hole and engages with the first fastening threaded hole 110c to fix the connector 220 on the first lens barrel 110. The diameter of the first mounting hole is larger than the diameter of the threaded part of the first fastening bolt, that is, a first adjustment gap is formed between the threaded part of the first fastening bolt and the first mounting hole, so that the connector 220 can be adjusted in position relative to the first lens barrel 110 in a direction perpendicular to the optical axis.
[0060] In addition to the structures described above, the first fastener may also consist of a first fastening stud and a first fastening nut. The first fastening stud is disposed on the first lens barrel 110, and the first fastening nut is adapted to the first fastening stud. During assembly, the first fastening stud passes through the first mounting hole and engages with the first fastening nut to fix the first lens barrel 110 to the connector 220. The diameter of the first mounting hole is larger than the diameter of the first fastening stud, thereby forming a first adjustment gap between the first mounting hole and the first fastening stud. It should be noted that the structure of the first fastener is not limited to the two structures described above, and is not limited here.
[0061] like Figure 2 As shown, the first connecting part 222 includes a plurality of connecting blocks arranged circumferentially at intervals. Each connecting block is provided with one or more first mounting holes. The connecting blocks are located on the side of the main body 221 facing the first lens barrel 110. The first lens barrel 110, the main body 221 and two adjacent connecting blocks form a second adjustment gap for at least partially exposing the second lens barrel 210. Thus, the second adjustment gap is formed between the surface of the main body 221 of the connector 220 facing the first lens barrel 110 and the end face of the first lens barrel 110 facing the connector 220.
[0062] Specifically, in Figure 2 In the illustrated embodiment, the first connecting portion 222 includes two connecting blocks evenly spaced circumferentially. The connecting blocks are fan-shaped, and each connecting block has two first mounting holes. By including two connecting blocks in the first connecting portion 222 and providing multiple first mounting holes on each connecting block, the stability of the connection between the connector 220 and the first lens barrel 110 can be improved, and the second adjustment gap between two adjacent connecting blocks can be ensured to have sufficient length in the circumferential direction to facilitate the rotation operation of the second lens barrel 210.
[0063] like Figure 1 , Figure 3 and Figure 5As shown, to facilitate the rotation of the second lens barrel 210 for focal length adjustment, an adjustment structure is also provided on the second lens barrel 210. In one embodiment of this application, an adjustment hole 210c is provided on the second lens barrel 210 corresponding to the position of the second adjustment gap. One adjustment hole 210c can be provided, or multiple adjustment holes 210c can be provided circumferentially. Multiple adjustment holes 210c can avoid the problem of a single adjustment hole 210c being blocked and unusable. The adjustment hole 210c can be a light hole or a threaded hole. The adjustment hole 210c is used to cooperate with a lever that extends into the second adjustment gap from outside the optical lens structure. When the adjustment hole 210c is a light hole, the lever is inserted into it. When the adjustment hole 210c is a threaded hole, the lever is threaded into the adjustment hole 210c. During installation and adjustment, the second lens barrel 210 can be driven to rotate relative to the connector 220 by the lever.
[0064] It should be noted that the adjustment structure on the second lens barrel 210 is not limited to the adjustment hole 210c mentioned above. It can also be an adjustment boss or adjustment rod provided on the second lens barrel 210. The length of the adjustment boss or adjustment rod protruding from the second lens barrel 210 should be such that it does not interfere with the first lens barrel 110 and the connecting member 220 during the rotation of the second lens barrel 210. Accordingly, the lever has a sleeve portion that cooperates with the adjustment boss or adjustment rod. The sleeve portion is used to be sleeved on the adjustment boss or adjustment rod. When the adjustment structure is an adjustment rod, the adjustment rod can be a smooth rod or a threaded rod. Accordingly, the inner wall of the sleeve portion can be a smooth wall surface adapted to the smooth rod or a threaded structure adapted to the threaded rod.
[0065] The adjustment structure described in the above embodiments is mainly used for large-range adjustment of the second lens barrel 210 during the assembly and adjustment process.
[0066] It should be noted that in other embodiments, the connector 220 can be adjusted along the optical axis direction to be disposed on the first lens barrel 110, and the second lens barrel 210 can be adjusted along the direction perpendicular to the optical axis to be disposed on the connector 220. That is, the connector 220 can be threaded to the first lens barrel 110, or the connector 220 and the first lens barrel 110 can be reciprocally slidably disposed on the first lens barrel 110 along the optical axis direction, and then the second lens barrel 210 is slidably disposed on the connector 220 by a slider group. The slider group is configured to allow the second lens barrel 210 to slide along the X-axis and Y-axis in a plane perpendicular to the optical axis direction, thereby allowing the concentricity of the second lens barrel 210 to be adjusted.
[0067] Specifically, the slider assembly includes a first slider, a first lead screw, a second slider, and a second lead screw. The first slider is slidably mounted on the connector 220 along the X-axis. The first lead screw is rotatably mounted on the connector 220 and threadedly engaged with the first slider to form a first lead screw pair. The second lead screw is rotatably mounted on the first slider. The second slider is slidably mounted on the first slider along the Y-axis and threadedly engaged with the second slider to form a second lead screw pair. The first and second lead screws extend outward through the connector 220 along a direction perpendicular to the optical axis to form an operating end for user operation. The connector 220 has a circumferentially extending groove at the point where the second lead screw protrudes, so that when the first lead screw drives the first slider to slide, the second lead screw will not interfere with the connector 220.
[0068] To prevent the second lens barrel 210 from rotating uncontrollably relative to the first lens barrel 110 during application, thereby causing a change in focal length, in this application, the second lens barrel 210 is provided with a locking assembly. The locking assembly includes a locking bracket 240 and a first locking member 250. The locking bracket 240 includes a base and a support. The base is disposed on the second lens barrel 210. The first end of the support is connected to the base, and the second end extends from the second adjustment gap and extends toward the connector 220 and / or the first lens barrel 110. The first locking member 250 is threadedly engaged with the first locking threaded hole 240a at the second end of the support to press against the connector 220 and / or the first lens barrel 110, thereby locking the second lens barrel 210 relative to the connector 220 and / or the first lens barrel 110.
[0069] like Figure 2 and Figure 3 As shown, in one embodiment of this application, the support portion of the locking bracket 240 is L-shaped, with the first end of the portion perpendicular to the optical axis direction connected to the base, the second end of the portion perpendicular to the optical axis direction extending through the second adjustment gap, the first end of the portion extending along the optical axis direction connected to the second end of the base, and the second end of the portion extending along the optical axis direction extending toward the connector 220.
[0070] The second end of the support portion of the locking bracket 240 extending along the optical axis is provided with a first locking threaded hole 240a. The first locking member 250 is a first locking bolt. The first locking bolt is threadedly engaged with the first locking threaded hole 240a, and the end of the first locking bolt is pressed against the connector 220 to lock the second lens barrel 210 relative to the connector 220.
[0071] In addition to locking the second lens barrel 210 relative to the connector 220, the locking bracket 240 can also make fine adjustments to the second lens barrel 210. That is, during the assembly and adjustment process, the second lens barrel 210 is first adjusted significantly by adjusting the structure, and then fine-tuned by the locking bracket 240. After the fine-tuning is completed, the second lens barrel 210 is locked by the locking bracket 240 cooperating with the first locking bolt.
[0072] Please see Figure 3 , Figure 5 and Figure 6 The second connecting part 223 is provided with a first sleeve having a third thread structure 223a, and the second lens barrel 210 is provided with a second sleeve having a fourth thread structure 210e. The third thread structure 223a and the fourth thread structure 210e are threadedly engaged so that the position of the second lens barrel 210 relative to the connecting member 220 is adjustable along the optical axis. It should be noted that in the above structure, one of the third thread structure 223a and the fourth thread structure 210e is an internal thread and the other is an external thread.
[0073] Furthermore, in order to improve the stability of the connection between the second connecting part 223 and the second lens barrel 210, in one embodiment of this application, the second connecting part 223 is provided with a first annular groove, and the inner or outer groove wall of the first annular groove is provided with a third thread structure 223a to form a first sleeve, and / or, the second lens barrel 210 is provided with a second annular groove 210d, and the inner or outer groove wall of the second annular groove 210d is provided with a fourth thread structure 210e to form a second sleeve. Through the above structure, a threaded fit structure with internal and external clamping can be formed, which can ensure that the concentricity between the second lens barrel 210 and the connecting member 220 does not change during the relative movement process, thus ensuring the system accuracy.
[0074] Specifically, please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 The second lens barrel 210 has a second annular groove 210d, and a fourth threaded structure 210e is provided on the outer wall of the second annular groove 210d, so that the outer wall of the second annular groove 210d forms a second sleeve, and the inner wall of the second annular groove 210d forms a support structure for the first sleeve. The second connecting part 223 does not have an annular groove structure, but has a third threaded structure 223a on its outer wall, such as... Figure 3As shown, the first sleeve of the second connecting part 223 is inserted into the second annular groove 210d through the cooperation of the third thread structure 223a and the fourth thread structure 210e. During the relative rotation of the second connecting part 223 and the second lens barrel 210, the inner wall of the second annular groove 210d and the inner wall of the second connecting part 223 slide in contact, thereby providing guidance and support for the second lens barrel 210 and improving the stability of the second lens barrel 210 during its movement relative to the connecting member 220.
[0075] Please see Figures 1 to 3 The side of the main body 221 away from the first lens barrel 110 is connected to the collimator mounting assembly by a second fastener. The collimator mounting assembly is provided with a second mounting hole 300a. The second fastener passes through the second mounting hole 300a to press and fix the collimator mounting assembly to the main body 221. A second adjustment gap is formed between the second fastener and the second mounting hole 300a so that the position of the collimator mounting assembly relative to the main body 221 is adjustable in the direction perpendicular to the optical axis.
[0076] The aforementioned second fastener can adopt various structures. In one specific embodiment, the second fastener is a second fastening bolt. Correspondingly, the main body 221 is provided with a second fastening threaded hole 221a that is adapted to the second fastening bolt. During assembly, the second fastening bolt passes through the second mounting hole 300a and engages with the second fastening threaded hole 221a to fix the collimator mounting assembly on the main body 221 of the connector 220. The diameter of the second mounting hole 300a is larger than the diameter of the threaded portion of the second fastening bolt, that is, a second adjustment gap is formed between the threaded portion of the second fastening bolt and the second mounting hole 300a, so that the position of the collimator mounting assembly can be adjusted relative to the connector 220 in a direction perpendicular to the optical axis.
[0077] In addition to the structure described above, the second fastener can also consist of a second fastening stud and a second fastening nut. The second fastening stud is disposed on the main body 221 of the connector 220, and the second fastening nut is adapted to the second fastening stud. During assembly, the second fastening stud passes through the second mounting hole 300a and engages with the second fastening nut to fix the collimator mounting assembly to the connector 220. The diameter of the second mounting hole 300a is larger than the diameter of the second fastening stud, thereby forming a second adjustment gap between the second mounting hole 300a and the second fastening stud. It should be noted that the structure of the second fastener is not limited to the two structures described above, and is not limited here.
[0078] like Figure 2 and Figure 3As shown, in one embodiment of this application, the collimator mounting assembly includes a fixing base 300 and a second locking member. The fixing base 300 is provided with a second mounting hole 300a, a mounting hole, and a second locking threaded hole 300b. The mounting hole penetrates the fixing base 300 along the optical axis direction. The fixing base 300 is used to be sleeved on the collimator 400 through the mounting hole. The second locking threaded hole 300b communicates with the mounting hole, and the axis of the second locking threaded hole 300b intersects with the axis of the mounting hole. The second locking member is threadedly engaged with the second locking threaded hole 300b so that the end of the second locking member extends into the mounting hole and presses against and locks the collimator 400.
[0079] The second locking element is a locking bolt or a locking stud.
[0080] This application also provides an optical device with a lens structure as described in the above embodiments. Since the optical device adopts the optical lens structure described in the above embodiments, the technical effects of the optical device can be referred to the above embodiments.
[0081] Specifically, in one embodiment of this application, the optical device is a lidar telescope. It should be noted, however, that the optical device is not limited to lidar telescopes; other optical devices requiring focal length and concentricity adjustment can also employ the aforementioned optical lens structure, and are not limited here.
[0082] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," or "the" do not specifically refer to the singular and may include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.
[0083] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0084] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0085] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. An optical lens structure, characterized in that, The assembly includes a first lens mounting assembly (100), a second lens mounting assembly (200), and a collimator mounting assembly arranged sequentially along the optical axis. The second lens mounting assembly (200) is arbitrarily disposed on the first lens mounting assembly (100) along the optical axis and perpendicular to the optical axis, and the collimator mounting assembly is arbitrarily disposed on the second lens mounting assembly (200) along the direction perpendicular to the optical axis.
2. The optical lens structure according to claim 1, characterized in that, The first lens mounting assembly (100) includes a first lens barrel (110) and at least one set of first lens fixing assemblies (120). The first lens fixing assembly (120) includes a first lens retaining ring (121) and a first elastic washer (122). The inner wall of the first lens barrel (110) is provided with a first annular step surface (110a) and a first threaded structure (110b) corresponding one-to-one with the first lens fixing assembly (120). The first lens retaining ring (121) is threadedly engaged with the first threaded structure (110b) and the lens is pressed and fixed to the first annular step surface (110a) by the first elastic washer (122).
3. The optical lens structure according to claim 2, characterized in that, The first lens mounting assembly (100) includes multiple sets of the first lens fixing assemblies (120), and multiple first annular step surfaces (110a) are arranged in a stepped manner along the optical axis direction.
4. The optical lens structure according to claim 2 or 3, characterized in that, The outer wall of the first lens barrel (110) is provided with an annular flange (130).
5. The optical lens structure according to claim 2 or 3, characterized in that, The second lens mounting assembly (200) includes a second lens barrel (210), a connector (220), and at least one set of second lens fixing assemblies (230). The second lens fixing assembly (230) includes a second lens retaining ring (231) and a second elastic washer (232). The inner wall of the second lens barrel (210) is provided with a second annular step surface (210a) and a second threaded structure (210b) that correspond one-to-one with the second lens fixing assembly (230). The second lens retaining ring (231) and the second threaded structure (210b) are threaded together, and the lens is pressed and fixed to the second annular step surface (210a) by the second elastic washer (232). The connector (220) has a light-transmitting structure that does not obstruct the optical path of the optical lens structure. The connector (220) is adjustablely positioned on the first lens barrel (110) along the direction perpendicular to the optical axis, and the second lens barrel (210) is adjustablely positioned on the connector (220) along the direction of the optical axis.
6. The optical lens structure according to claim 5, characterized in that, The connector (220) includes a main body (221) and a first connecting part (222) and a second connecting part (223) disposed on the main body (221). The first connecting part (222) is connected to the first lens barrel (110) by a first fastener. The first connecting part (222) is provided with a first mounting hole that mates with the first fastener. The first fastener passes through the first mounting hole to press and fix the connector (220) to the first lens barrel (110). A first adjustment gap is formed between the first fastener and the first mounting hole so that the position of the connector (220) relative to the first lens barrel (110) is adjustable in a direction perpendicular to the optical axis. The second connecting part (223) is provided with a first sleeve having a third thread structure (223a), and the second lens barrel (210) is provided with a second sleeve having a fourth thread structure (210e). The third thread structure (223a) and the fourth thread structure (210e) are threadedly engaged so that the position of the second lens barrel (210) relative to the connecting member (220) is adjustable along the optical axis direction.
7. The optical lens structure according to claim 6, characterized in that, The first connecting portion (222) includes a plurality of connecting blocks arranged circumferentially at intervals. The connecting blocks are located on the side of the main body portion (221) facing the first lens barrel (110). The first lens barrel (110), the main body portion (221), and two adjacent connecting blocks form a second adjustment gap for at least partially exposing the second lens barrel (210).
8. The optical lens structure according to claim 7, characterized in that, The second lens barrel (210) is provided with an adjustment hole (210c) corresponding to the position of the second adjustment gap. The adjustment hole (210c) is used to cooperate with a lever that extends from outside the optical lens structure through the second adjustment gap to drive the second lens barrel (210) to rotate relative to the connector (220).
9. The optical lens structure according to claim 7, characterized in that, The second lens barrel (210) is provided with a locking assembly, which includes a locking bracket (240) and a first locking member (250). The locking bracket (240) includes a base and a support. The base is disposed on the second lens barrel (210). The first end of the support is connected to the base, and the second end extends out from the second adjustment gap and extends toward the connector (220). The first locking member (250) is threadedly engaged with the first locking threaded hole (240a) at the second end of the support to press against the connector (220) and lock the second lens barrel (210) relative to the connector (220) and the first lens barrel (110).
10. The optical lens structure according to claim 6, characterized in that, The second connecting part (223) is provided with a first annular groove, and the inner or outer groove wall of the first annular groove is provided with the third thread structure (223a), and / or, the second lens barrel (210) is provided with a second annular groove (210d), and the inner or outer groove wall of the second annular groove (210d) is provided with the fourth thread structure (210e).
11. The optical lens structure according to claim 6, characterized in that, The side of the main body (221) away from the first lens barrel (110) is connected to the collimator mounting assembly by a second fastener. The collimator mounting assembly is provided with a second mounting hole (300a). The second fastener passes through the second mounting hole (300a) to press and fix the collimator mounting assembly to the main body (221). A second adjustment gap is formed between the second fastener and the second mounting hole (300a) so that the position of the collimator mounting assembly relative to the main body (221) is adjustable in a direction perpendicular to the optical axis.
12. The optical lens structure according to claim 11, characterized in that, The collimator mounting assembly includes a mounting base (300) and a second locking member. The mounting base (300) is provided with a mounting hole and a second locking threaded hole (300b). The mounting hole extends through the mounting base (300) along the optical axis. The mounting base (300) is used to be sleeved on the collimator (400) through the mounting hole. The second locking threaded hole (300b) communicates with the mounting hole and the axis of the second locking threaded hole (300b) intersects with the axis of the mounting hole. The second locking member is threadedly engaged with the second locking threaded hole (300b) so that the end of the second locking member extends into the mounting hole and presses against and locks the collimator (400).
13. An optical device, characterized in that, The lens of the optical device adopts the optical lens structure as described in any one of claims 1-9.
14. The optical device according to claim 13, characterized in that, The optical device is a lidar telescope.