Continuous zoom lens and adjustable objective lens for continuous zoom lens

Abstract

The utility model discloses a continuous zoom lens and an adjustable objective lens used for the continuous zoom lens. An adjustable fixing assembly of the adjustable objective lens is arranged on a continuous zoom lens body in a sleeving mode, and the adjustable objective lens and the continuous zoom lens body are fixed; the adjustable fixing assembly comprises a guide nail, an inner shell and an outer shell, the first end of the guide nail sequentially penetrates through a limiting groove in the side wall of the inner shell and a first positioning hole of the objective lens group, and the second end of the guide nail is arranged in a spiral groove in the side wall of the outer shell; when the shell rotates, the shell drives the objective lens group to move along the extending direction of the spiral groove and the limiting groove through the guide nail so as to adjust the interval between the objective lens group and the continuous zoom lens main body. Through cooperative arrangement of the outer shell, the inner shell and the guide nail, the outer shell is rotated to drive the objective lens group to move so as to adjust the interval between the objective lens group and the continuous zoom lens main body, so that the continuous zoom lens assembled with the adjustable objective lens has an adjustable working detection distance and is adaptive to detected samples with different heights.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine vision detection, in particular to a continuous zoom lens and an adjustable objective lens for the continuous zoom lens. BACKGROUND

[0002] As the "eyes" of machine vision, the lens plays a very important role in the machine vision system, and the continuous zoom lens, as a kind of lens, is an important part of many machine vision systems and measurement systems. In many existing application scenarios, the continuous zoom lens needs to be fixed in the machine, so that the working distance cannot be adjusted. Therefore, when using, the position of the measured sample needs to be accurately placed at the working distance position of the continuous zoom lens for detection. However, since the heights of different measured samples may be different, when different measured samples are replaced, the sample mounting position of the machine needs to be adjusted again, which makes the detection of the machine vision system very inconvenient and cannot adapt to measured samples with different heights. SUMMARY

[0003] The present application aims to provide a continuous zoom lens and an adjustable objective lens for the continuous zoom lens, so as to solve the above technical problems in the prior art and improve the applicability of the vision system equipped with the continuous zoom lens.

[0004] The first aspect of the present application provides an adjustable objective lens for a continuous zoom lens, which comprises an adjustable fixing assembly and an objective lens group arranged in the adjustable fixing assembly. The adjustable fixing assembly is sleeved on a main body of the continuous zoom lens to fix the adjustable objective lens and the main body of the continuous zoom lens.

[0005] The adjustable fixing assembly comprises a guide pin and an inner shell and an outer shell which are sequentially sleeved outside the objective lens group. The side wall of the inner shell is provided with a limiting groove extending along the axial direction of the inner shell, and the side wall of the outer shell is provided with a spiral groove. The objective lens group is provided with a first positioning hole. The first end of the guide pin is sequentially arranged in the limiting groove and the first positioning hole, and the second end of the guide pin is arranged in the spiral groove. When the outer shell rotates, the outer shell moves the objective lens group along the extension direction of the spiral groove and the limiting groove through the guide pin to adjust the interval between the objective lens group and the main body of the continuous zoom lens.

[0006] Further, the spiral groove is arranged on the side of the outer shell close to the inner shell, and the spiral groove is communicated with both ends of the outer shell in the axial direction.

[0007] Further, the first end of the inner shell is formed with a stepped structure, the inner diameter of the stepped structure gradually increases away from the objective lens group, the outermost stepped structure is sleeved on one end of the main body of the continuous zoom lens, and the main body of the continuous zoom lens abuts at the connection of the stepped structure.

[0008] Further, the inner shell further comprises a first annular groove and a second annular groove arranged along the circumference of the inner shell, the first annular groove and the second annular groove are oppositely arranged on two sides of the limiting groove.

[0009] Further, the outer shell is further provided with a second positioning hole, the adjustable objective lens further comprises a first limiting column, the first limiting column is arranged in the second positioning hole, and one end of the first limiting column close to the inner shell is in abutment with one side of the inner shell close to the outer shell, or the one end of the first limiting column close to the inner shell is arranged in the first annular groove.

[0010] Further, the adjustable objective lens further comprises a limiting ring and a second limiting column, the limiting ring is provided with at least one limiting hole, and the second limiting column is arranged in the limiting hole and the second annular groove.

[0011] Further, the guide nail comprises a first guide structure, a second guide structure and a connecting structure for connecting the first guide structure and the second guide structure, part of the first guide structure is arranged in the spiral groove, the rest of the first guide structure is arranged in the limiting groove, and the second guide structure is arranged in the first positioning hole.

[0012] Further, the objective lens group comprises an objective lens and an objective lens base, a side wall of the objective lens base is in abutment with one side of the inner shell away from the outer shell, the first positioning hole is arranged on the side wall of the objective lens base, and the objective lens is arranged at one end of the objective lens base away from the first positioning hole.

[0013] Further, the adjustable fixing assembly comprises two groups of guide nails, the inner shell is provided with two groups of limiting grooves, the outer shell is provided with two groups of spiral grooves, and the guide nails are correspondingly arranged in the limiting grooves and the spiral grooves, wherein the two groups of guide nails, the two groups of limiting grooves and the two groups of spiral grooves are mirror image arranged with respect to the central axis of the adjustable fixing assembly.

[0014] The second aspect of the application provides a continuous zoom lens, the continuous zoom lens comprises a continuous zoom lens body and an adjustable objective lens as described above, the inside of the continuous zoom lens body is fixedly provided with a main lens, the adjustable objective lens is sleeved on one end of the continuous zoom lens body, and the adjustable objective lens adjusts the interval between the objective lens group and the main lens through the adjustable fixing assembly.

[0015] Different from the prior art, the adjustable objective lens of the application comprises an adjustable fixing assembly and an objective lens group arranged in the adjustable fixing assembly. The adjustable objective lens is sleeved on the continuous zoom lens body through the adjustable fixing assembly, and the distance between the objective lens group and the continuous zoom lens body is adjusted through the adjustable fixing assembly, so as to adjust the working detection distance of the continuous zoom lens, adapt the measurement of samples of different heights, and improve the applicability of the continuous zoom lens. Specifically, the adjustable fixing assembly of the application comprises a shell, an inner shell and a guide pin. The side wall of the inner shell is provided with a limiting groove extending along the axial direction of the inner shell, the side wall of the shell is provided with a spiral groove, the objective lens group is provided with a first positioning hole, the first end of the guide pin is sequentially arranged in the limiting groove and the first positioning hole, the relative fixation of the guide pin and the objective lens group is realized, and the limiting groove extends along the axial direction of the inner shell, so that the guide pin moves along the axial direction of the inner shell with the objective lens group; the second end of the guide pin is arranged in the spiral groove, so that the guide pin moves along the extension direction of the spiral groove with the objective lens group. The shell of the application rotates to drive the guide pin to move in the spiral groove and the limiting groove, so as to realize the movement of the objective lens group along the extension direction of the spiral groove and the limiting groove, adjust the air interval change between the objective lens group and the continuous zoom lens body, and change the working detection distance of the continuous zoom lens within a certain magnification range.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, rather than limiting the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a structural schematic diagram of an embodiment of the adjustable objective lens for the continuous zoom lens of the application;

[0019] Figure 2 is Figure 1 is a sectional structural schematic diagram of the adjustable objective lens for the continuous zoom lens in along the A-A direction in

[0020] Figure 3 is Figure 1 is an exploded structural schematic diagram of the adjustable objective lens for the continuous zoom lens in

[0021] Figure 4 is Figure 3 is a structural schematic diagram of an embodiment of the shell in

[0022] Figure 5 isFigure 4 Fig. 6 is a schematic view of a cross-sectional structure of the outer shell along the B-B direction in Fig. 5;

[0023] Figure 6 Figure 3 Fig. 7 is a schematic view of a structure of an inner shell in Fig. 6;

[0024] Figure 7 Figure 3 Fig. 8 is a schematic view of a structure of a guide pin in Fig. 6;

[0025] Figure 8 Figure 3 Fig. 9 is a schematic view of a structure of an objective lens assembly in Fig. 6;

[0026] Figure 9 Fig. 10 is a schematic view of a structure of a continuous zoom lens in the present application;

[0027] The figure reference is: 1-adjustable objective lens for the continuous zoom lens, 10-adjustable fixing assembly, 11-inner shell, 111-limiting groove, 112-step structure, 113-first annular groove, 114-second annular groove, 12-outer shell, 121-spiral groove, 122-second positioning hole, 13-guide pin, 131-first guide structure, 132-second guide structure, 133-connection structure, 20-objective lens assembly, 21-objective lens, 22-objective lens base, 221-first positioning hole, 30-limiting ring, 31-limiting hole, 40-continuous zoom lens, 41-continuous zoom lens body, 411-main lens, 42-adjustable objective lens. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the technical solutions of the present application, the continuous zoom lens and the adjustable objective lens for the continuous zoom lens provided by the present application are further described in detail below in combination with the drawings and specific embodiments. It can be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] The terms "first", "second", and the like in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0030] ​​​Since the existing continuous zoom lens cannot adapt to different heights of the measured sample, the application provides a tunable objective lens for a continuous zoom lens, which is sleeved on the main body of the continuous zoom lens through the adjustable fixing assembly of the tunable objective lens, and the distance between the objective lens group arranged in the adjustable fixing assembly and the main body of the continuous zoom lens is adjusted through the adjustable fixing assembly to adjust the working detection distance of the continuous zoom lens, adapt to the measurement of different height measured samples, and improve the applicability of the continuous zoom lens.

[0031] Please refer to Figures 1-9 , Figure 1 is a structural schematic diagram of an embodiment of the tunable objective lens for a continuous zoom lens of the application; Figure 2 is Figure 1 a cross-sectional structural schematic diagram of the tunable objective lens for a continuous zoom lens in Figure 3 is Figure 1 an exploded structural schematic diagram of the tunable objective lens for a continuous zoom lens in Figure 4 is Figure 3 a structural schematic diagram of an embodiment of the housing in

[0032] Figure 5 is Figure 4 a cross-sectional structural schematic diagram of the housing in Figure 6 is Figure 3 a structural schematic diagram of an embodiment of the inner shell in Figure 7 is Figure 3 a structural schematic diagram of an embodiment of the guide pin in Figure 8 is Figure 3 a structural schematic diagram of an embodiment of the objective lens group in

[0033] As shown in Figures 1-3 , the tunable objective lens 1 of the embodiment includes an adjustable fixing assembly 10 and an objective lens group 20, and the objective lens group 20 is arranged in the interior of the adjustable fixing assembly 10, wherein the adjustable fixing assembly 10 is sleeved on the main body of the continuous zoom lens for fixing the tunable objective lens 1 and the main body of the continuous zoom lens. Specifically, the adjustable fixing assembly 10 of the embodiment includes an inner shell 11, an outer shell 12 and a guide pin 13, and the inner shell 11 and the outer shell 12 are sequentially sleeved outside the objective lens group 20.

[0034] As shown in Figure 6As shown, the first end of the inner shell 11 is formed with a stepped structure 112, the inner diameter of the stepped structure 112 gradually increases in the direction away from the objective lens group 20, the outermost stepped structure 112 is sleeved on one end of the continuously variable lens body, and the continuously variable lens body abuts at the connection of the stepped structure 112. Alternatively, the stepped structure 112 of the present embodiment can be fixedly arranged with the continuously variable lens body through interference fit; or in other embodiments, at least one of the inner wall of the stepped structure 112 or the outer wall of the continuously variable lens is provided with a sawtooth structure, which improves the friction between the two and further improves the fixing effect of the two.

[0035] The side wall of the inner shell 11 is provided with a limiting groove 111 extending in the axial direction of the inner shell 11, and a first annular groove 113 and a second annular groove 114 arranged in the circumferential direction of the inner shell 11, wherein the first annular groove 113 and the second annular groove 114 are oppositely arranged on both sides of the limiting groove 111 and have a certain interval distance from the limiting groove 111.

[0036] As shown in Figure 2 and Figure 8 The objective lens group 20 of the present embodiment includes an objective lens 21 and an objective lens seat 22, and the side wall of the objective lens seat 22 abuts against the side of the inner shell 11 away from the outer shell 12. The objective lens group 20 is provided with a first positioning hole 221, which is arranged on the side wall of the objective lens seat 22 and penetrates through the side wall of the objective lens seat 22. The objective lens 21 is arranged at the end of the objective lens seat 22 away from the first positioning hole 221.

[0037] Alternatively, the objective lens 21 of the present embodiment can be a plano-convex lens. Alternatively, in other embodiments, the objective lens 21 can be a plano-concave lens, a meniscus lens, or an objective lens formed by combining the above-mentioned objective lenses. At the same time, the objective lens 21 and the objective lens seat 22 of the present embodiment can be an interference fit structure, and the convex surface of the objective lens 21 is arranged in the opening of the objective lens seat 22.

[0038] As shown in Figures 4-5 The side wall of the outer shell 12 is provided with a spiral groove 121, wherein the spiral groove 121 is arranged on the side of the outer shell 12 close to the inner shell 11, and the spiral groove 121 communicates the two ends of the outer shell 12 in the axial direction. In particular, the included angle between the extension direction of the spiral groove 121 and the radial direction of the outer shell 12 ranges from 0° to 90°, and the included angle between the extension direction of the spiral groove 121 and the radial direction of the outer shell 12 can be set according to the length of the outer shell 12.

[0039] Alternatively, the outer side wall of the outer shell 12 of the present embodiment can be provided with a plurality of convex structures for improving the friction between the touch part of the user and the outer shell 12, preventing the user from rotating the outer shell 12 too much.

[0040] The outer shell 12 is further provided with a second positioning hole 122, and the second positioning hole 122 is provided through the outer shell 12. The adjustable objective lens 1 further includes a first limiting column (not shown), and the first limiting column is passed through the second positioning hole 122. The end of the first limiting column close to the inner shell 11 abuts against the side of the inner shell 11 close to the outer shell 12, or the end of the first limiting column close to the inner shell 11 is provided in the first annular groove 113. The specific setting position of the first limiting column is related to the rotation distance of the outer shell 12. The first limiting column abuts against the side wall of the outer shell 12 or the first annular groove 113 to fix the outer shell 12 and the inner shell 11.

[0041] Optionally, the second positioning hole 122 and the first limiting column of this embodiment may be a screw hole and a stud, or, in other embodiments, the second positioning hole 122 and the first limiting column may also be a blind hole and a blind column, or other structures that can achieve common fixation.

[0042] like Figure 7 As shown, the guide pin 13 of this embodiment includes a first guide structure 131 , a second guide structure 132 and a connecting structure 133 , wherein the connecting structure 133 is used to connect the first guide structure 131 and the second guide structure 132 .

[0043] Specifically, if Figure 2 As shown, the first end of the guide pin 13 is sequentially inserted into the limiting groove 111 and the first positioning hole 221, and the second end of the guide pin 13 is disposed in the spiral groove 121. Part of the first guide structure 131 is disposed in the spiral groove 121, and the remaining part of the first guide structure 131 is disposed in the limiting groove 111. The second guide structure 132 is inserted into the first positioning hole 221.

[0044] Optionally, the lens thickness of the objective lens 21 of this embodiment is smaller than the distance between the end face of the objective lens 21 close to the step structure 112 and the first positioning hole 221. When the second guide structure 132 of the guide pin 13 is passed through the first positioning hole 221, it will not touch the objective lens 21.

[0045] When the housing 12 rotates, the housing 12 leads the objective lens group 20 to move along the extending direction of the spiral groove 121 and the limiting groove 111 through the guide pin 13 to adjust the interval between the objective lens group 20 and the continuous zoom lens body.

[0046] Optionally, in this embodiment, the diameter of the first guide structure 131 is larger than the diameter of the second guide structure 132, and the diameter of the second guide structure 132 is larger than the diameter of the connecting structure 133, so the end face of the first guide structure 131 close to the connecting structure 133 abuts against the outer wall of the inner shell 11.

[0047] Further, the adjustable fixing assembly 10 comprises two groups of guide pins 13, the inner shell 11 is provided with two groups of limiting grooves 111, the outer shell 12 is provided with two groups of spiral grooves 121, the guide pins 13 are correspondingly arranged in the limiting grooves 111 and the spiral grooves 121, and the two groups of guide pins 13, the two groups of limiting grooves 111 and the two groups of spiral grooves 121 are arranged in mirror image with respect to the center axis of the adjustable fixing assembly 10.

[0048] Further, as shown in the figure, Figure 3 the adjustable objective 1 of the embodiment further comprises a limiting ring 30 and a second limiting column, the limiting ring 30 is provided with at least one limiting hole 31, and the second limiting column is arranged in the limiting hole 31 and the second annular groove 114.

[0049] Optionally, the limiting hole 31 and the second limiting column of the embodiment can be a threaded hole and a threaded column, or in other embodiments, the limiting hole 31 and the second limiting column can also be a blind hole and a blind column, or other structures capable of achieving mutual fixation.

[0050] When the outer shell 12 is rotated to the top end towards the side close to the step structure 112, the second limiting column is arranged in the limiting hole 31 and the second annular groove 114, further fixing the outer shell 12 and the inner shell 11.

[0051] When the user controls the rotation of the outer shell 12 of the embodiment, the outer shell 12 moves the objective lens group 20 along the extension direction of the spiral groove 121 and the limiting groove 111 through the guide pin 13, realizes the movement of the objective lens group 20 along the axial direction of the inner shell 11, adjusts the interval between the objective lens group and the continuous zoom lens body, and further adjusts the working detection distance of the continuous zoom lens assembled with the adjustable objective, so that the continuous zoom lens adapts to the measurement of samples with different heights, and improves the applicability of the continuous zoom lens.

[0052] The application also provides a continuous zoom lens, please refer to Figure 9 , Figure 9 is a structural schematic diagram of an embodiment of the continuous zoom lens of the application. As shown in the figure, Figure 9 the continuous zoom lens 40 of the embodiment comprises a continuous zoom lens body 41 and an adjustable objective 42, and the adjustable objective 42 can be the adjustable objective 1 of any of the above embodiments.

[0053] Specifically, the inside of the continuous zoom lens body 41 is fixedly provided with a main lens 411, and the adjustable objective lens 42 is sleeved at one end of the continuous zoom lens body 41, specifically, the end provided with the main lens 411. The adjustable objective lens 42 adjusts the interval between the objective lens group 20 inside the adjustable fixing assembly 10 and the main lens 411 through the adjustable fixing assembly 10, and then adjusts the change of the air interval between the objective lens group 20 and the continuous zoom lens body 411, so that the continuous zoom lens 40 realizes the change of the working detection distance within a certain magnification range.

[0054] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. An adjustable objective lens for a continuously zooming lens, characterized in that: The adjustable objective lens includes an adjustable fixing component and an objective lens group arranged inside the adjustable fixing component, and the adjustable fixing component is sleeved on the continuous zoom lens body to fix the adjustable objective lens and the continuous zoom lens body; The adjustable fixing assembly includes a guide pin and an inner shell and an outer shell which are sequentially sleeved on the outside of the objective lens group, the side wall of the inner shell is provided with a limiting groove extending along the axial direction of the inner shell, the side wall of the outer shell is provided with a spiral groove, the objective lens group is provided with a first positioning hole, the first end of the guide pin is sequentially passed through the limiting groove and the first positioning hole, and the second end of the guide pin is provided in the spiral groove; wherein, when the outer shell rotates, the outer shell drives the objective lens group to move along the extension direction of the spiral groove and the limiting groove through the guide pin to adjust the interval between the objective lens group and the continuous zoom lens body.

2. The adjustable objective lens according to claim 1, wherein The spiral groove is arranged on a side of the outer shell close to the inner shell, and the spiral groove communicates with both ends of the outer shell along the axial direction.

3. The adjustable objective lens according to claim 1, wherein A step structure is formed at the first end of the inner shell, and the inner diameter of the step structure gradually increases in the direction away from the objective lens group. The outermost step structure is sleeved on one end of the continuous zoom lens body, and the continuous zoom lens body abuts against the connection of the step structure.

4. The adjustable objective lens according to claim 3, characterized in that The inner shell further includes a first annular groove and a second annular groove arranged along the circumference of the inner shell, and the first annular groove and the second annular groove are arranged on two sides of the limiting groove opposite to each other.

5. The adjustable objective lens according to claim 4, characterized in that The outer shell is further provided with a second positioning hole, and the adjustable objective lens further includes a first limiting column, which is passed through the second positioning hole, and the end of the first limiting column close to the inner shell abuts against the side of the inner shell close to the outer shell, or the end of the first limiting column close to the inner shell is provided in the first annular groove.

6. The adjustable objective lens according to claim 4, characterized in that The adjustable objective lens further includes a limiting ring and a second limiting column. The limiting ring is provided with at least one limiting hole. The second limiting column is passed through the limiting hole and the second annular groove.

7. The adjustable objective lens according to claim 1, wherein The guide pin includes a first guide structure, a second guide structure and a connecting structure for connecting the first guide structure and the second guide structure. Part of the first guide structure is arranged in the spiral groove, and the remaining part of the first guide structure is arranged in the limiting groove. The second guide structure is passed through the first positioning hole.

8. The adjustable objective lens according to claim 1, wherein: The objective lens assembly includes an objective lens and an objective lens base, the side wall of the objective lens base abuts against the side of the inner shell facing away from the outer shell, and the first positioning hole is set on the side wall of the objective lens base, and the objective lens is set at one end of the objective lens base away from the first positioning hole.

9. The adjustable objective lens according to claim 1, wherein: The adjustable fixing assembly includes two groups of guide pins, the inner shell is provided with two groups of limiting grooves, and the outer shell is provided with two groups of spiral grooves. The guide pins are correspondingly arranged in the limiting grooves and the spiral grooves, wherein the two groups of guide pins, the two groups of limiting grooves and the two groups of spiral grooves are mirror-imaged with respect to the central axis of the adjustable fixing assembly.

10. A continuous zoom lens, characterized in that: The continuous zoom lens includes a continuous zoom lens body and an adjustable objective lens as described in any one of claims 1 to 9, wherein a main lens is fixedly arranged inside the continuous zoom lens body, and the adjustable objective lens is mounted on one end of the continuous zoom lens body. The adjustable objective lens adjusts the interval between the objective lens group and the main lens through the adjustable fixing component.

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