Zoom lens group sorting jig

Abstract

The utility model discloses a zoom lens group sorting jig. The lens parameter detection device comprises a first fixing cylinder and a base which are buckled with each other, a first group to be detected, a diaphragm module and a second group to be detected are sequentially arranged between the first fixing cylinder and the base from top to bottom at intervals, and the base is assembled on the lens parameter detection device; the first to-be-detected group and the second to-be-detected group are respectively placed in the jig and are mounted on the lens parameter detection equipment, and after detection is finished, the first to-be-detected group and the second to-be-detected group can be quickly taken out of the jig and are immediately placed in the next to-be-detected group for detection, so that the waiting time is shortened, the detection speed is further improved, and the detection efficiency is improved. The requirement of batch production is met through the sorting jig, and a large number of lens groups can be rapidly and accurately processed.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to a sorting fixture for a zoom lens group. Background Art

[0002] A zoom lens is composed of multiple groups, and the imaging is affected by each group simultaneously. Therefore, in order to ensure good imaging, it is necessary to ensure that the assembly of each group is in a good state. The quality of the group assembly is generally judged by the results of eccentricity detection and interval detection.

[0003] At present, in production, in order to consider material utilization rate, the lenses with poor imaging detection of the whole machine will be disassembled into groups and put into use again. After multiple uses, the yield will be greatly reduced, and it is difficult to judge the quality of the groups. At this time, they will be scrapped, resulting in too high costs; the existing methods for judging the quality of zoom lens groups have high costs and low efficiency, and are not applicable to mass production. Summary of the Utility Model

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a sorting fixture for a zoom lens group, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] The technical solution of the utility model is as follows:

[0006] According to one aspect of the utility model, it includes: a first fixing cylinder and a base that are buckled with each other. A first group to be measured, a diaphragm module, and a second group to be measured are sequentially arranged at intervals from top to bottom between the first fixing cylinder and the base. The base is assembled on a lens parameter detection device.

[0007] Further, one end of the first fixing cylinder is provided with a third chamber, and the first group to be measured is inserted into the third chamber; the other end of the first fixing cylinder is sequentially provided with a second chamber and a first chamber from top to bottom, and the first chamber, the second chamber, and the third chamber are connected; the diaphragm module is inserted into the second chamber; a convex edge is arranged between the third chamber and the second chamber, the upper end surface of the first group to be measured abuts against the convex edge, and the lower end surface of the diaphragm module abuts against the convex edge;

[0008] The second group to be measured extends towards the diaphragm module and is provided with a second fixing cylinder. The second fixing cylinder is provided with a third installation groove. One end of the second group to be measured is inserted into the third installation groove, and the other end is located in the first chamber.

[0009] Further, the first fixing cylinder and the base are fixed by magnetic attraction.

[0010] Further, a connecting seat is fixedly arranged on the outer periphery of the first fixing cylinder near one end of the base. A plurality of magnets are embedded in the connecting seat, and a plurality of magnets are correspondingly embedded in the base.

[0011] Furthermore, the base is provided with a boss extending toward the first fixing tube, the connecting seat is sleeved on the boss, and the connecting seat is matched with the boss.

[0012] Furthermore, the boss is in the shape of a prism that is narrow at the top and wide at the bottom.

[0013] Furthermore, the lens parameter detection device is an MTF detection device.

[0014] Furthermore, the base is provided with a plurality of locking holes and equipped with a plurality of bolts, and the base is installed on the MTF detection device through the cooperation between the locking holes and the bolts.

[0015] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] Firstly, by placing the first group to be tested and the second group to be tested into the fixture respectively and installing them on the lens parameter detection equipment, after the detection is completed, the first group to be tested and the second group to be tested can be quickly taken out of the fixture and immediately placed in the next group to be tested for detection, which reduces the waiting time and further improves the detection speed. By selecting the fixture, the needs of mass production are met, and a large number of lens groups can be processed quickly and accurately.

[0017] Secondly, the magnetic fixing method does not require the use of traditional fasteners such as screws and nuts. It can be quickly fixed by simply placing the first fixing tube close to the magnetic part of the base. This method greatly simplifies the installation steps and improves work efficiency.

[0018] Thirdly, the boss is in the shape of a prism that is narrow at the top and wide at the bottom. The boss makes it easier to align and initially fix the connecting seat when it is inserted, which facilitates the disassembly and assembly of the first fixing tube and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The explosion structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 The explosion structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 Schematic structural diagram of the first group to be tested and the second group to be tested assembled in the present utility model;

[0024] In the figure: first fixing cylinder - 1, connecting seat - 11, flange - 12, first installation groove - 13, first chamber - 14, second chamber - 15, third chamber - 16, diaphragm module - 2, base - 3, second installation groove - 31, second fixing cylinder - 32, third installation groove - 321, locking hole - 33, connecting portion - 34, boss - 35, light passing hole - 36, magnet - 4, first group to be tested - A, second group to be tested - B. Specific embodiments

[0025] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present utility model, but do not limit the scope of the present utility model. Similarly, the following embodiments are only partial embodiments of the present utility model rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0026] As Figures 1 to 4 shown, this solution provides a sorting jig for a zoom lens group.

[0027] In this embodiment, the first group to be tested A is the front group of the lens, and the second group to be tested B is the rear group of the lens.

[0028] Please refer to Figures 1 to 4, including: a first fixing cylinder 1 and a base 3 that are snap-fitted to each other. Between the first fixing cylinder 1 and the base 3, a first group of objects to be measured A, a diaphragm module 2, and a second group of objects to be measured B are sequentially arranged at intervals from top to bottom. Specifically, a third chamber 16 is provided at one end of the first fixing cylinder 1, and the first group of objects to be measured A is inserted into the third chamber 16; at the other end of the first fixing cylinder 1, a second chamber 15 and a first chamber 14 are sequentially arranged from top to bottom, and the first chamber 14, the second chamber 15, and the third chamber 16 are connected and communicated with each other; the diaphragm module 2 is inserted into the second chamber 15; specifically, the diaphragm module 2 is in interference fit with the second chamber 15. A convex edge 12 is provided between the third chamber 16 and the second chamber 15. The first group of objects to be measured A abuts against the upper end surface of the convex edge 12, and the diaphragm module 2 abuts against the lower end surface of the convex edge 12; the second group of objects to be measured B extends towards the diaphragm module 2 and is provided with a second fixing cylinder 32. The second fixing cylinder 32 is provided with a third installation groove 321. One end of the second group of objects to be measured B is inserted into the third installation groove 321, and the other end is located in the first chamber 14. The base 3 is assembled on a lens parameter detection device. In this embodiment, the lens parameter detection device is an MTF detection device. The base 3 is provided with a plurality of locking holes 33. Specifically, the plurality of locking holes 33 are annularly arranged around the outer periphery of the boss 35 on the base 3 and are provided with a plurality of bolts. Through the cooperation of the locking holes 33 and the bolts, the base 3 is installed on the MTF detection device. The connecting seat 11 is further provided with a connecting portion 34 for cooperating with the detection head of the MTF detection device. A light passing hole 36 is further provided between the installation groove 321 and the connecting portion 34.

[0029] Please refer to Figures 1 to 3 , the first fixing cylinder 1 and the base 3 are magnetically fixed to each other. Specifically, a connecting seat 11 is fixedly provided on the outer periphery of one end of the first fixing cylinder 1 close to the base 3, and a plurality of magnets 4 are embedded in the connecting seat 11. Corresponding magnets 4 are embedded in the base 3. In this embodiment, the number of magnets 4 is 6. The base 3 is provided with three second installation grooves 31 around the outer periphery of the boss 35. Among them, three magnets 4 are respectively assembled in each second installation groove 31 by dispensing; the connecting seat 11 is correspondingly provided with three first installation grooves 13, and the other three magnets 4 are respectively assembled in each first installation groove 13 by dispensing. The magnets 4 on the base 3 correspond to the magnets on the connecting seat 11 one by one. The number and assembly method of the magnets 4 are not limited herein. The magnetic fixing method does not require the use of traditional fasteners such as screws and nuts. Only by bringing the magnetic attracting part of the first fixing cylinder 1 close to the base 3 can rapid fixing be achieved. This method greatly simplifies the installation steps and improves work efficiency.

[0030] Please refer to Figures 1 to 3, the base 3 is provided with a boss 35 extending towards the first fixing cylinder 1. The connecting seat 11 is sleeved on the boss 35, and the connecting seat 11 fits with the boss 35. The boss 35 is in the shape of a frustum with a narrower upper part and a wider lower part. The boss 35 enables the connecting seat 11 to be more easily aligned and preliminarily fixed when being sleeved, facilitating the disassembly and assembly of the first fixing cylinder 1 and the base 3.

[0031] Working principle: Insert the first group to be measured A into the third chamber 16, insert the diaphragm module 2 into the second chamber 15, insert the second group to be measured B into the installation groove 321, fix the first fixing cylinder 1 to the base 3 through the magnet 4, and finally install the base 3 on the MTF detection device through the cooperation of the locking hole 33 and the bolt.

[0032] Due to the control of the dimensional tolerance of the jig, the relative inclination and coaxiality after the placement of the first group to be measured A and the second group to be measured B are better, so that the cooperation between the groups approaches the theoretical state, and then the influencing factors of group assembly are excluded. The group with a better imaging detection result is used as the calibration, and then the lens groups to be judged good or bad are successively replaced into the jig for detection one by one, so that one group is the calibration OK group and one group is the group to be judged. Then, the quality of the group is judged by the quality of the imaging detection result. If the imaging result is OK, the group is judged as OK; if the imaging result is NG, the group is judged as NG.

[0033] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A zoom lens group selection jig, characterized in that: include: A first fixed tube (1) and a base (3) are interlocked with each other, a first group to be tested (A), an aperture module (2) and a second group to be tested (B) are sequentially arranged between the first fixed tube (1) and the base (3) from top to bottom, and the base (3) is mounted on a lens parameter detection device; A third chamber (16) is provided at one end of the first fixed tube (1), and the first group to be tested (A) is inserted into the third chamber (16); a second chamber (15) and a first chamber (14) are provided at the other end of the first fixed tube (1) in order from top to bottom, and the first chamber (14), the second chamber (15) and the third chamber (16) are connected; the aperture module (2) is inserted into the second chamber (15); a convex edge (12) is provided between the third chamber (16) and the second chamber (15), the first group to be tested (A) is in contact with the upper end surface of the convex edge (12), and the aperture module (2) is in contact with the lower end surface of the convex edge (12); The second group to be measured (B) is provided with a second fixed tube (32) extending toward the aperture module (2), the second fixed tube (32) is provided with a third mounting groove (321), one end of the second group to be measured (B) is inserted into the third mounting groove (321), and the other end is located in the first chamber (14); The first fixing cylinder (1) and the base (3) are fixed by magnetic attraction.

2. The zoom lens group selection jig according to claim 1, characterized in that: A connecting seat (11) is fixedly provided on the outer periphery of one end of the first fixed tube (1) close to the base (3), a plurality of magnets (4) are embedded in the connecting seat (11), and a plurality of magnets (4) are correspondingly embedded in the base (3).

3. The zoom lens group selection jig as claimed in claim 2, characterized in that: The base (3) is provided with a boss (35) extending toward the first fixed tube (1), the connecting seat (11) is sleeved on the boss (35), and the connecting seat (11) and the boss (35) are matched.

4. The zoom lens group selection jig as claimed in claim 3, characterized in that: The boss (35) is in the shape of a prism that is narrow at the top and wide at the bottom.

5. The zoom lens group selection jig as claimed in claim 1, characterized in that: The lens parameter detection device is an MTF detection device.

6. The zoom lens group selection jig as claimed in claim 5, characterized in that: The base (3) is provided with a plurality of locking holes (33) and is equipped with a plurality of bolts. The base (3) is installed on the MTF detection device through the cooperation between the locking holes (33) and the bolts.

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