Lens assembling and adjusting tool

Abstract

The utility model provides a lens assembling and adjusting tool which comprises a base which is provided with a supporting bottom face and a reference surface which are arranged in parallel, and the reference surface is used for bearing a to-be-assembled lens frame assembly; the multiple stand columns are vertically arranged on the reference surface, and the multiple stand columns surround the base in the circumferential direction to form an assembling space, so that the to-be-assembled mirror frame assembly is located in the assembling space; the multiple centering adjusting pieces are arranged on the multiple stand columns correspondingly, and the multiple centering adjusting pieces distributed in the circumferential direction abut against the side wall of the to-be-assembled mirror frame assembly correspondingly; the centering adjusting pieces move in the direction close to or away from the central axis of the assembling space so that the optical axis position of the to-be-assembled mirror frame assembly can be adjusted. The problem that the deviation value of sub optical axes between lens frame assemblies in the existing lens cone assembling process is large is solved.

Description

Technical Field

[0001] This application relates to the technical field of optical part processing, and more specifically, to a lens assembly and adjustment tooling. Background Art

[0002] A lens is a commonly used part in an optical system. Usually, multiple lens frame assemblies are installed in a lens barrel to achieve corresponding optical functions, such as imaging, detection, etc. Structurally, a lens frame assembly is usually composed of a mechanical lens frame (usually made of aluminum) and an optical lens (made of glass, or a lens group formed by multiple optical lenses). The edge of the lens frame can be processed by centering turning to ensure that the offset and tilt between the mechanical axis of the mechanical lens frame in the lens frame assembly and the optical axis of the optical lens are within the required standards. The inner wall of the lens barrel is usually formed by precision machining, so that a lens with higher precision can be formed after the lens frame assembly is installed in the lens barrel.

[0003] Existing lens assembly methods usually adopt two ways: The first is the direct installation method. The assembly accuracy completely depends on the fitting accuracy between the lens and mechanical parts. Due to the machining size tolerance and the assembly error between mechanical parts, the accuracy of the produced lens is not high. It is difficult to ensure not only the accuracy of the offset and tilt between the mechanical axis of the mechanical lens frame in each lens frame assembly and the optical axis of the optical lens, but also the offset accuracy between the total optical axis of the lens and the sub-optical axes of multiple lens frame assemblies. The second is to use a centering lathe to turn the lens frame of the lens frame assembly. By centering turning, the tilt and offset between the mechanical axis of each lens frame assembly and the sub-optical axis of the optical lens of the lens frame assembly are ensured to be within the processing standards, and the tilt and offset of the optical axis of a single lens frame assembly meet the quality requirements. Then, when each lens frame assembly is respectively installed in the lens barrel, the offset accuracy between the total optical axis of the lens and the sub-optical axes of multiple lens frame assemblies is ensured through the fitting error between the outer wall of the lens frame and the inner wall of the lens barrel. However, due to the fitting error in each area of the inner wall of the lens barrel, there will still be a certain deviation in the optical axes between the lens frame assemblies after being installed in the lens barrel, and the deviation amount between the sub-optical axes is relatively large, thus unable to meet the quality requirements of high optical accuracy. For example, it is required that the offset of the sub-optical axis of each lens frame assembly from the total optical axis of the entire lens is within 10um, and the tilt between the sub-optical axis and the total optical axis is within 20 seconds for high optical accuracy quality.

[0004] Therefore, during the existing lens barrel assembly process, the deviation amount of the sub-optical axes between the lens frame assemblies to be assembled is relatively large, so there is still a problem that the optical accuracy achieved by the optical design system is not high, and the existing technology still needs to be improved and developed. Summary of the Utility Model

[0005] The purpose of this application is to provide a lens assembly and adjustment tooling, which solves the problem of relatively large deviation amount of the sub-optical axes between the lens frame assemblies during the existing lens barrel assembly process.

[0006] To achieve the above object, the technical solution adopted in this application is as follows:

[0007] This application provides a lens assembly tooling, including:

[0008] A base, the base has a supporting bottom surface and a reference surface arranged in parallel, and the reference surface is used to carry the frame assembly to be assembled;

[0009] A plurality of columns, the plurality of columns are all vertically arranged on the reference surface, and the plurality of columns surround the base in the circumferential direction to form an assembly space, so that the frame assembly to be assembled is located in the assembly space;

[0010] A plurality of centering adjustment parts, the plurality of centering adjustment parts are respectively arranged on the plurality of columns, and the plurality of centering adjustment parts distributed in the circumferential direction respectively abut against the side walls of the frame assembly to be assembled;

[0011] By moving each centering adjustment part along the direction close to or away from the central axis of the assembly space, the optical axis position of the frame assembly to be assembled is adjusted.

[0012] In an optional embodiment, through holes are provided on the columns;

[0013] The centering adjustment part includes: a limiting rod, and the limiting rod extends into the assembly space through the through hole.

[0014] In an optional embodiment, the through hole is a threaded hole, the limiting rod is a screwed part, and the screwed part is screwed in the threaded hole and approaches or moves away from the central axis of the assembly space by screwing.

[0015] In an optional embodiment, the screwed part is a set screw.

[0016] In an optional embodiment, there are a plurality of through holes provided on each column, and the plurality of through holes are arranged at intervals in the up and down direction;

[0017] A plurality of limiting rods corresponding to the through holes are provided on each column.

[0018] In an optional embodiment, the interval distances between the plurality of through holes on each column are equal or unequal.

[0019] In an optional embodiment, grooves or through holes are provided on the reference surface of the base, and the grooves or through holes are used to accommodate the lower convex lens of the frame assembly.

[0020] In an optional embodiment, a fixing part is connected between the plurality of columns, and the fixing part is used to make the central axes of the columns perpendicular to the reference surface.

[0021] In an optional embodiment, the fixing part includes: a fixing ring, and the fixing ring is connected to the upper ends of the respective columns.

[0022] In an alternative embodiment, the parallelism between the supporting bottom surface and the reference surface is not greater than 20 seconds.

[0023] The beneficial effects of a lens assembly and adjustment tooling provided by this application are at least as follows: By cooperating with an optical axis detection device, the frame assembly to be installed is stacked on the reference surface of the base and located within the assembly space. According to the optical axis deviation detected by the optical axis detection device, each centering adjustment member moves along the direction close to or away from the central axis of the assembly space, pushing the frame assembly to be adjusted to adjust its position in the horizontal direction. Since the optical axis of the frame assembly also moves and adjusts during the movement, the optical axis of the frame assembly to be adjusted is adjusted to be on the same axis as the optical axis of the lens assembly below (or within the deviation range meeting high-precision requirements). At this time, the multiple centering adjustment members located outside the frame assembly fix the position of the frame assembly, achieving high-precision alignment of the optical axes of the upper and lower frame assemblies. By using this lens assembly and adjustment tooling, after detecting the central deviation of the sub-optical axes of adjacent frame assemblies and adjusting through centering adjustment members, it can meet the high optical precision quality requirements that the deviation of the sub-optical axis of each frame assembly from the total optical axis of the entire lens is within 10 um, and the inclination between the sub-optical axis and the total optical axis is within 20 seconds. Moreover, the structure of the lens assembly and adjustment tooling is simple, the processing cost is low, it can realize the assembly and adjustment of the frame assembly, ensure the assembly and adjustment precision, and meet the optical precision index of the optical design system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 FIG. is a schematic structural diagram of a lens assembly and adjustment tooling provided by an embodiment of this application in a use state;

[0026] Figure 2 FIG. is a schematic structural diagram of a lens assembly and adjustment tooling provided by an embodiment of this application;

[0027] Figure 3 FIG. is a top view of a lens assembly and adjustment tooling provided by an embodiment of this application during adjustment;

[0028] Figure 4 FIG. is a front view of a lens assembly and adjustment tooling provided by an embodiment of this application during adjustment.

[0029] Among them, the reference numerals in the figures:

[0030] 10. Frame assembly; 100. Base; 110. Support bottom surface; 120. Reference surface; 130. Through hole; 200. Column; 210. Through hole; 211. Threaded hole; 220. Fixing member; 221. Fixing ring; 300. Centering adjustment member; 310. Limiting rod; 311. Threaded connecting member. Detailed implementation manner

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly located on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the drawings, and are only for the convenience of description and cannot be construed as a limitation to the technical solution of the present application. The terms "first" and "second" are only used for the purpose of convenient description and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0033] Please refer to Figure 1 、 Figure 3, this embodiment provides a lens assembly tooling for aligning the sub-optical axes of multiple lens frame assemblies 10 to ensure high-precision quality requirements for each sub-optical axis and the total optical axis of the lens after assembly. A lens assembly tooling. The lens assembly tooling of this embodiment mainly includes: a base 100, multiple columns 200, and multiple centering adjustment members 300. For convenience of structural description, this lens assembly tooling is vertically arranged; thus, the base 100 is horizontally arranged. The base 100 can be in a disk shape. The base 100 has a supporting bottom surface 110 and a reference surface 120 arranged in parallel. The supporting bottom surface 110 is the lower surface and the reference surface 120 is the upper surface. In use, the base 100 is fixed on the optical flat on the optical axis detection device through the supporting bottom surface 110, and the fixing method can be bonding. The reference surface 120 is used to carry the lens frame assembly 10 to be assembled, and the lens frame assemblies 10 to be adjusted are stacked on the reference surface 120. Multiple columns 200 are all vertically arranged on the reference surface 120. Multiple columns 200 surround the base 100 in a circumferential direction to form an assembly space, so that the lens frame assemblies 10 to be assembled are located in the assembly space. Multiple columns 200 can be circularly surrounded. For example, if 4 columns 200 are used, then the 4 columns 200 are respectively located at the four quadrant points of the circle. Thus, the columns 200 are evenly distributed on the circle. Multiple centering adjustment members 300 are respectively arranged on multiple columns 200. The multiple centering adjustment members 300 distributed in the circumferential direction respectively abut against the side walls of the lens frame assemblies 10 to be assembled. For example, there is at least one centering adjustment member 300 on each column 200. The centering adjustment members 300 are arranged radially with respect to the assembly space, that is, horizontally connected to the columns 200. The multiple centering adjustment members 300 form a group, and the centering adjustment members 300 in it are all at the same height of the column 200. Therefore, this group of centering adjustment members 300 is used to adjust one lens frame assembly 10. By moving each centering adjustment member 300 along the direction close to or away from the central axis of the assembly space, the position of the sub-optical axis of the lens frame assembly 10 to be assembled is adjusted. When turning the centering adjustment members 300 respectively located at the four quadrant points in a group, the middle lens frame assembly 10 is pushed by the centering adjustment members 300, so that the sub-optical axis of this lens frame assembly 10 can be adjusted in the horizontal direction.

[0034] Please refer to Figure 1 , Figure 3, A lens assembly tooling in this embodiment, when used in cooperation with an optical axis detection device, stacks the frame assembly 10 to be installed on the reference surface 120 of the base 100 and locates it within the assembly space. According to the optical axis deviation detected by the optical axis detection device, each centering adjustment member 300 moves along the direction close to or away from the central axis of the assembly space, pushing the frame assembly 10 to be adjusted to make a position adjustment in the horizontal direction. Since the optical axis of the frame assembly 10 also moves and adjusts during the movement, the optical axis of the frame assembly 10 to be adjusted is adjusted to be on the same axis as the optical axis of the lens assembly below (or within the deviation range meeting the high-precision requirements). At this time, the multiple centering adjustment members 300 located outside the frame assembly 10 fix the position of the frame assembly 10, realizing the high-precision alignment of the optical axes of the upper and lower frame assemblies 10. By using this lens assembly tooling, after detecting the central deviation of the sub-optical axes of adjacent frame assemblies 10 and making adjustments through the centering adjustment members 300, it can meet the high optical precision quality requirements that the deviation of the sub-optical axis of each frame assembly 10 from the total optical axis of the entire lens is within 10um and the tilt between the sub-optical axis and the total optical axis is within 20 seconds. Moreover, the structure of the lens assembly tooling is simple and the processing cost is low, realizing the assembly and adjustment of the frame assembly 10, ensuring the assembly and adjustment precision, and meeting the optical precision index of the optical design system.

[0035] Please refer to Figure 1 , Figure 2 , Further, the column 200 in this embodiment can adopt a column 200 similar to a cylindrical shape (such as an arcuate column 200). A through hole 210 is opened in the cylindrical column 200. Since there is a vertical plane on the arcuate column 200, it is convenient to open the through hole 210. The centering adjustment member 300 in this embodiment includes a limiting rod 310. The limiting rod 310 extends through the through hole 210 into the assembly space. The limiting rod 310 is connected to the column 200, and there are multiple connection methods. For example, a fine adjustment screwing structure is arranged on the outer side of the column 200, and the limiting rod 310 is driven through the fine adjustment screwing structure. The limiting rod 310 is guided by the through hole 210, so that the limiting rod 310 can move radially. By adopting the form of cooperation between the through hole 210 and the limiting rod 310, during use, the inner end of the limiting rod 310 abuts against the outer wall of the frame assembly 10 to be adjusted for pushing, with a simple structure and convenient operation.

[0036] Please refer to Figure 1 , Figure 2, Further, to simplify the structure and reduce the production cost, the through hole 210 in this embodiment is provided as a threaded hole 211, and the limiting rod 310 is a screwed part 311. The screwed part 311 is screwed into the threaded hole 211 and approaches or moves away from the central axis of the assembly space by screwing. The cooperation between the threaded hole 211 and the screwed part 311 is directly carried out, so that the inner end of the screwed part 311 abuts against the outer wall of the spectacle frame assembly 10 to be adjusted by screwing, simplifying the structure and facilitating production and processing.

[0037] Further, the screwed part 311 in this embodiment is a setscrew. The setscrew is a standard part with a low cost of market purchase, thus reducing the cost of the entire lens adjustment tooling.

[0038] Please refer to Figure 1 、 Figure 2 、 Figure 3 , if only one set of centering adjustment parts is provided, then the optical axis deviation of two adjacent spectacle frame assemblies 10 can be adjusted. For example, first take the sub-optical axis of the spectacle frame assembly 10 located below as the reference. This set of centering adjustment parts 300 only adjusts the position of the spectacle frame assembly 10 located above. After detecting the deviation through the optical axis detection device, it is adjusted through the centering adjustment parts 300 to align the sub-optical axes of the upper and lower adjacent spectacle frame assemblies 10 or within a very small deviation (the deviation required for high precision), and the total optical axis of the optical system formed by combining two adjacent spectacle frame assemblies 10 and the total optical axis between the sub-optical axes meet the high optical precision quality requirement within 20 seconds of tilt, thus solving the technical problem.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 4 , Further, to realize the optical axis adjustment of more than two spectacle frame assemblies 10, multiple sets of centering adjustment parts need to be provided. The multiple sets of centering adjustment parts 300 are located in different height directions. In the specific structure, there are multiple through holes 210 on each column 200, and the multiple through holes 210 are arranged at intervals in the up and down direction. Multiple limiting rods 310 corresponding to the through holes 210 are provided on each column 200. The through holes 210 at different heights on each column 200 form multiple sets of centering adjustment parts 300. When it is necessary to adjust 3 or more stacked spectacle frame assemblies 10, the corresponding centering adjustment parts 300 are adjusted in the height direction in sequence, and the optical axis adjustment of more than two spectacle frame assemblies 10 can be completed. Thus, it can be applied to the assembly and adjustment of the spectacle frame assemblies 10 in different types of lenses, improving the versatility of this lens assembly and adjustment tooling.

[0040] Please refer to Figure 2 、 Figure 4, Further, the spacing distances between the multiple through holes 210 on each upright column 200 are equal or unequal. In a specific structure, the spacing distances between the lower through holes 210 on the upright column 200 can be the same, and the spacing is relatively small. In this way, when adjusting the frame assembly 10 with a smaller thickness, the limiting rods 310 in each layer of through holes 210 can be used to adjust different frame assemblies 10 respectively. When adjusting the frame assembly 10 with a larger thickness, the limiting rods 310 can be inserted after skipping some through holes 210 for adjustment, with relatively strong versatility. Since the longer the lens barrel is, the farther the spacing between the adjacent optical lenses of the lens assemblies at the distal end is, the distances between the upper through holes 210 on the upright column 200 can be different, and the set spacing distance is relatively large, so as to match the distribution law of the frame assemblies 10 in the lens, improving the practicability of this tooling.

[0041] Please refer to Figure 2 , Further, a groove or a through hole 130 is formed on the reference surface 120 of the base 100 in this embodiment. The groove or the through hole 130 is used to accommodate the lower convex lens of the frame assembly 10. When the optical lens in the frame assembly 10 to be adjusted and installed protrudes downward from the end face of the mechanical frame, the protruding part of the optical lens downward can be accommodated in the groove and the through hole 130, so as to achieve clearance for the downward convex part of the optical lens, avoiding the problem that the frame assembly 10 is not stably placed on the base 100. The through hole 130 is preferably used on the base 100 in this embodiment. If the thickness of the base 100 is set to be relatively thick, the through hole 130 formed will be relatively deep, which can basically meet the placement requirements of all specifications of downward convex optical lenses.

[0042] Please refer to Figure 1 , Figure 2 , Further, a fixing member 220 is connected between the multiple upright columns 200 in this embodiment. The fixing member 220 is used to make the central axes of the upright columns 200 perpendicular to the reference surface 120. If the upper end is not fixed, due to the relatively large length of the upright column 200 in the up and down direction, it is easier to tilt closer to the upper end during the installation process. Moreover, there is no connection and support between the upright columns 200, and the structural strength is low. By using the fixing member 220 to fix the multiple upright columns 200, the perpendicularity of the upright rods can be ensured, and further the moving accuracy of the centering adjustment member 300 during the process of adjusting and pushing the frame assembly 10 can be ensured. The fixing member 220 can be arranged at the top of the multiple upright columns 200 or at multiple positions in the up and down direction to achieve the technical effect.

[0043] Please refer to Figure 1 , Figure 2, Further, the fixing member 220 in this embodiment is arranged at the upper end of the column 200. In a specific structure, the fixing member 220 includes: a fixing ring 221, and the fixing ring 221 is connected to the upper ends of the respective columns 200. For example, the fixing ring 221 is fixed to the top of each column 200 by screws. Threaded holes 211 are opened on the top end faces of the four columns 200 in this embodiment, and corresponding holes are also opened at the corresponding positions of the fixing ring 221. The screws pass through the fixing ring 221 and are screwed to the tops of the respective columns 200. Fixing the fixing ring 221 at the top can not only ensure the verticality of the upright rod, but also facilitate assembly and optimize the structure.

[0044] Please refer to Figure 1 , Figure 2 , Further, the parallelism between the support bottom surface 110 and the reference surface 120 is not greater than 20 seconds. In this way, the parallelism requirements for the upper and lower surfaces of the base 100 are relatively high. When the support bottom surface 110 is placed on the optical flat of the optical axis detection device, the parallelism between the frame assembly 10 placed on the reference surface 120 and the optical flat is within a predetermined error. Thus, it is ensured that the tilt error of the sub-optical axes of the two frame assemblies 10 during the detection process is within a predetermined range. The accuracy of the detection process is improved.

[0045] The specific use process when using a lens alignment tooling of this embodiment to perform optical axis adjustment on multiple frame assemblies is as follows: Bond the support bottom surface of this lens alignment tool to the optical flat of the optical axis detection device.

[0046] First step: First, place the first frame assembly located below on the reference surface of the base and tighten it with a setscrew. Then place the second frame assembly above the first frame assembly, and the end faces of the two frame assemblies are closely attached.

[0047] Second step: Detect the center deviation of the optical axis of the second frame assembly relative to the sub-optical axis of the first frame assembly through the optical axis detection device, and adjust the second frame assembly with a centering adjustment member according to the detected deviation result, so that the center deviation of the optical axis of the second frame assembly relative to the sub-optical axis of the first frame assembly is within a predetermined range.

[0048] Adopting the above assembly process, the offset of the sub-optical axis of each frame assembly from the total optical axis of the entire lens can be within 10 um, and the high optical precision quality requirement that the inclination between the sub-optical axis and the total optical axis is within 20 seconds can be achieved.

[0049] In summary, a lens assembly and adjustment tooling provided by the present application can carry the adjusted lens frame assembly for overall movement. It only needs to remove the glue between the supporting bottom surface of the base and the optical flat to ensure the assembly and adjustment accuracy. The assembly and adjustment stability of the lens frame assembly is higher and the accuracy is higher, making it more suitable for the high-precision assembly and adjustment of light and small components. In addition, the base is designed with clearance to adapt to the assembly and adjustment of multiple lens frame assemblies when the optical lens of the lowermost lens frame assembly has a downward protruding end face.

[0050] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A lens adjustment tool, characterized in that: include: A base, the base having a supporting bottom surface and a reference surface arranged in parallel, the reference surface being used to carry the frame assembly to be assembled; A plurality of columns, each of which is vertically arranged on the reference surface, and each of which surrounds the base in a circumferential direction to form an assembly space, so that the frame assembly to be assembled is located in the assembly space; A plurality of centering adjustment members, wherein the plurality of centering adjustment members are respectively arranged on the plurality of upright posts, and the plurality of centering adjustment members distributed along the circumferential direction respectively abut against the side walls of the to-be-assembled frame assembly; Each centering adjustment member is moved in a direction close to or away from the central axis of the assembly space to adjust the optical axis position of the to-be-assembled frame assembly.

2. The lens adjustment tool as claimed in claim 1, characterized in that: The column is provided with a through hole; The centering adjustment member includes a limiting rod, which passes through the through hole and extends into the assembly space.

3. The lens adjustment tool as claimed in claim 2, characterized in that: The through hole is a threaded hole, and the limiting rod is a screw-connecting member. The screw-connecting member is screwed in the threaded hole and moves closer to or away from the central axis of the assembly space by being twisted.

4. The lens adjustment tool as claimed in claim 3, characterized in that: The screw connection piece is a top screw.

5. The lens adjustment tool as claimed in claim 2, characterized in that: There are a plurality of through holes on each of the columns, and the plurality of through holes are spaced apart in the up-down direction; A plurality of limiting rods are arranged on each of the upright posts corresponding to the through holes.

6. The lens adjustment tool as claimed in claim 5, characterized in that: The spacing distances between the plurality of through holes on each of the pillars are equal or unequal.

7. The lens adjustment tool as claimed in claim 1, characterized in that: A groove or a through hole is provided on the reference surface of the base, and the groove or the through hole is used to accommodate the lower convex lens of the lens frame assembly.

8. The lens adjustment tool as claimed in claim 1, characterized in that: A fixing piece is connected between the plurality of columns, and the fixing piece is used to make the central axis of each column perpendicular to the reference surface.

9. The lens adjustment tool as claimed in claim 8, characterized in that: The fixing member comprises a fixing ring connected to the upper end of each of the columns.

10. The lens adjustment tool as claimed in any one of claims 1 to 9, characterized in that: The parallelism between the support bottom surface and the reference surface is no greater than 20 seconds.

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