Zoom microscope lens
By introducing the front and rear moving structures into the microscope lens, combined with the control system, the automatic zoom of the microscope lens is achieved, solving the problems of slow manual adjustment speed and low accuracy, and improving the focus accuracy and efficiency.
Patent Information
- Application Number
- CN202422176778.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The zooming process of existing microscope lenses relies on manual adjustment, which is slow and has low accuracy, making it difficult to achieve accurate observation image data.
The front and rear moving structures are adopted, and the distance between the front end of the lens and the object and the imaging distance of the image surface are automatically adjusted through the control system, and continuous automatic optical magnification of 1-16x times and 16-20x times is achieved to reduce human error.
The automatic zoom of the microscope lens is realized, with a magnification error of less than 2%, greatly improving the focus accuracy and operating efficiency.
Smart Images
Figure CN223193200U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of microscope lenses, and specifically relates to a zoom microscope lens. Background Technique
[0002] A microscope is an instrument used to observe microscopic objects invisible to the naked eye, and is an optical instrument composed of a combination of one or several lenses.
[0003] If the working distance between the microscope and the observed object changes, this working distance is also called the back focal length. Then the object observed by the microscope is located within the focal point of the microscope. To achieve this effect, the focal length of the objective lens must be able to change so that the objective lens can adapt to the change in the working distance. That is to say, optical zoom is achieved by changing the position between the microscope lens and the object and the focal point, making the observed local image clearer. Therefore, most microscope lenses use optical zoom and have high requirements for control accuracy. The key to microscope zoom is to change the position of the lens. Currently, it is generally manually adjusted by an operator, and generally only the front end of the microscope lens can be adjusted to make the microscope lens reach the appropriate position. However, manual zoom is slow and inaccurate, and it is difficult to obtain accurate observed image data. Therefore, a microscope lens that is more convenient for focusing needs to be designed. Content of the Utility Model
[0004] The purpose of the utility model is to provide a zoom microscope lens, aiming to solve the above technical problems. The utility model mainly adjusts the distance between the front end of the lens and the object through the front moving structure, thereby realizing the adjustment of the lens magnification. The imaging distance at the rear end of the image plane is adjusted through the rear moving structure, and two-way distance adjustment can be achieved, realizing two groups of continuous automatic optical zoom of 1 - 16x and 16 - 20x, making the magnification error less than 2%, and effectively improving the focusing accuracy.
[0005] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0006] A zoom microscope lens includes a front moving structure, a rear moving structure, an optical structure, and an image plane moving structure. The front moving structure is sleeved outside the optical structure, the rear moving structure is sleeved outside the image plane moving structure, and the optical structure and the image plane moving structure are arranged front and rear, and their center lines are on the same straight line.
[0007] Preferably, the front moving structure includes a front moving sleeve, a front moving ring, and a front driving component. The front moving ring is sleeved outside the optical structure, the front moving sleeve is sleeved outside the front moving ring, and the front driving component is arranged outside the end of the front moving ring and can drive the front moving ring to rotate;
[0008] The rear movement structure includes a rear movement sleeve, a rear movement ring, and a rear drive component. The rear movement ring is sleeved outside the image plane movement structure. The rear movement sleeve is sleeved outside the rear movement ring. The rear drive component is arranged outside the end of the rear movement ring and can drive the rear movement ring to rotate.
[0009] Preferably, the front movement sleeve and the rear movement sleeve have the same structure, both having a movement ring sleeving part and a drive component clamping part. Inside the movement ring sleeving part, there is a limiting sliding groove. On the drive component clamping part, there is a drive wheel avoiding groove.
[0010] Preferably, both the front movement ring and the rear movement ring are provided with spiral ring sliding holes. Outside the optical structure and the image plane movement structure, there are protruding sliding rods. The sliding rods pass through the spiral ring sliding holes, and their outer ends can be slidably clamped in the limiting sliding grooves of the front movement sleeve or the rear movement sleeve.
[0011] Preferably, the front drive component and the rear drive component have the same structure, both including a drive driven wheel, a drive driving wheel, and a drive motor. The drive driven wheel is clamped outside the end of the front movement ring or the rear movement ring and can drive the front movement ring or the rear movement ring to rotate. The drive motor is fixed on the motor fixing seat. The motor fixing seat is fixed on the front movement sleeve or the rear movement sleeve. The drive driving wheel is installed on the output end of the drive motor and is driven to rotate by the drive motor, and forms a meshing transmission with the drive driven wheel.
[0012] Preferably, on the side of the drive driven wheel facing the front movement ring or the rear movement ring, there is a limiting bearing. On the side where the two drive driven wheels face each other, there is a linkage part. Between the linkage part and the drive driven wheel, there is a limiting washer.
[0013] Preferably, the optical structure includes an outer lens barrel, a lens mounting barrel, and a lens group. The outer lens barrel is clamped inside the front movement sleeve. The lens mounting barrel is installed inside the outer lens barrel by means of threads. The lens group is installed inside the lens mounting barrel. Outside the outer lens barrel, there is a sliding rod.
[0014] Preferably, the lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from front to back. The first lens is a double-convex lens convex towards the object side. The second lens is a double-concave lens. The third lens is a meniscus convex lens convex towards the image side. The fourth lens is a double-convex lens. The fifth lens is a meniscus concave lens.
[0015] A first washer is provided between the first lens and the second lens. A second washer is provided between the third lens and the fourth lens. A third washer is provided between the fifth lens and the bottom of the lens mounting barrel. The third washer is installed at the inner bottom of the lens mounting barrel by means of threads.
[0016] Preferably, the image plane moving structure includes an image plane moving cylinder, which is arranged inside the rear moving ring. A protruding sliding rod is provided on the outer side of its front end. The sliding rod passes through the rear moving ring, and its end portion can be slidably clamped inside the rear moving sleeve.
[0017] Preferably, it further includes a lens outer cylinder and a lens housing. The lens outer cylinder is sleeved on the outer side of the front moving sleeve, and the lens housing is sleeved on the outside of the lens outer cylinder and the rear moving structure.
[0018] The variable magnification microscope lens of the present invention has the following beneficial effects: portable box
[0019] 1. The variable magnification microscope lens of the present invention is provided with a front moving structure, a rear moving structure and an image plane moving structure. The front moving structure and the rear moving structure are both controlled by a control system. Users can select different gears according to their own needs and can achieve automatic zooming. In this way, manual zooming is not required, reducing human zooming errors.
[0020] 2. The variable magnification microscope lens of the present invention mainly adjusts the distance between the front end of the lens and the object through the front moving structure to achieve the adjustment of the lens magnification. The rear moving structure adjusts the imaging distance at the rear end of the image plane to achieve the adjustment of different magnifications of the lens, and thus more accurate lens magnification adjustment can be achieved.
[0021] 3. The variable magnification microscope lens of the present invention is provided with two groups of zoom gears, 1-16x continuous automatic optical zoom, with a magnification error less than 2%, and 16-20x continuous automatic optical zoom, with a magnification error less than 2%, effectively improving the focusing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is the overall schematic diagram of the variable magnification microscope lens of the present invention;
[0023] Figure 2 is the internal structure schematic diagram of the variable magnification microscope lens of the present invention;
[0024] Figure 3 is the exploded view of the variable magnification microscope lens of the present invention;
[0025] Figure 4 is the schematic diagram of the front moving sleeve or the rear moving sleeve structure of the variable magnification microscope lens of the present invention;
[0026] Figure 5 is the cross-sectional view of the variable magnification microscope lens of the present invention;
[0027] Figure 6 is the cross-sectional view of the lens group of the variable magnification microscope lens of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the products of the present utility model will be further described in detail below in conjunction with embodiments and drawings.
[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element; when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present utility model. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0031] As Figures 1 to 3 shown, a variable magnification microscope lens includes a front moving structure 1, a rear moving structure 2, an optical structure 3 and an image plane moving structure 4. The front moving structure 1 is sleeved outside the optical structure 3, the rear moving structure 2 is sleeved outside the image plane moving structure 4, the optical structure 3 and the image plane moving structure 4 are arranged front and rear, and their center lines are on the same straight line.
[0032] It should be noted that: in this embodiment, the variable magnification microscope lens further includes a control system. The control system is in telecommunication connection with the front moving structure 1 and the rear moving structure 2 and is used to control the front moving structure 1 and the rear moving structure 2. The front moving structure 1 can drive the movement of the optical structure 3 to adjust the distance at the front end of the microscope lens, so as to change the distance between the optical structure 3 and the object, and achieve 1-16x times continuous automatic optical zoom by driving the optical structure 3 through the front moving structure 1; the rear moving structure 2 can drive the image plane moving structure 4 to adjust the distance at the rear end of the limit mirror lens, so as to change the object and imaging distance, and achieve 16-20x times continuous automatic optical zoom by driving the image plane moving structure 4 through the rear moving structure 2, so as to change the clarity of the microscope lens, and form a selection of two adjustable magnification ratios; the present utility model realizes focusing by controlling the front moving structure 1 and the rear moving structure 2 through the control system, which is more accurate than manual adjustment and can effectively reduce the error of manual adjustment; furthermore, the setting of the optical structure 3 enables the present utility model to realize the selection of three groups of light source modes, namely, normal light mode, polarized light mode and ultraviolet light mode.
[0033] As shown Figures 1 to 3 in the figure, the front moving structure 1 includes a front moving sleeve 10, a front moving ring 11 and a front driving component 12. The front moving ring 11 is sleeved outside the optical structure 3, the front moving sleeve 10 is sleeved outside the front moving ring 11, and the front driving component 12 is arranged outside the end of the front moving ring 11 and can drive the front moving ring 11 to rotate; the rear moving structure 2 includes a rear moving sleeve 20, a rear moving ring 21 and a rear driving component 22. The rear moving ring 21 is sleeved outside the image plane moving structure 4, the rear moving sleeve 20 is sleeved outside the rear moving ring 21, and the rear driving component 22 is arranged outside the end of the rear moving ring 21 and can drive the rear moving ring 21 to rotate.
[0034] It should be noted that: in this embodiment, the optical structure 3 is movably clamped inside the front moving ring 11 and forms a clearance fit with the inside of the front moving ring 11, and is driven by the front moving ring 11; the front driving component 12 is clamped outside the end of the front moving ring 11 through a bearing and can drive the front moving ring 11 to rotate; the front part of the front moving sleeve 10 is sleeved outside the front moving ring 11, and the rear part of the front moving sleeve 10 is sleeved outside the front driving component 12, so as to protect the front moving ring 11 and the front driving component 12 from being collided by the external environment; when the user needs to adjust the distance at the front end of the microscope lens, the user can select the required magnification range of 1-16x, and the control system controls the front driving component 12 to start, driving the front moving ring 11 to rotate, and then driving the optical structure 3 to move back and forth inside the front moving ring 11, so as to realize the adjustment of the distance between the optical structure 3 and the object, and then realize the 1-16x continuous automatic optical zoom; similarly, the image plane moving structure 4 is movably clamped inside the rear moving ring 21 and forms a clearance fit with the inside of the rear moving ring 21, and is driven by the rear moving ring 21; the front driving component 12 is clamped outside the end of the rear moving ring 21 through a bearing and can drive the rear moving ring 21 to rotate. The front part of the rear moving sleeve 20 is sleeved outside the rear moving ring 21, and the rear part of the rear moving sleeve 20 is sleeved outside the rear driving component 22, avoiding the rear moving ring 21 and the rear driving component 22 from being collided by the external environment, and playing a role in protecting the rear moving ring 21 and the rear driving component 22; when the user needs to adjust the distance at the rear end of the microscope lens, the user can select the required magnification range of 16-20x, and the control system controls the rear driving component 22 to start, driving the rear moving ring 21 to rotate, and then driving the image plane moving structure 4 to move back and forth inside the rear moving ring 21, so as to realize the adjustment of the imaging distance, and then realize the 16-20x continuous automatic optical zoom.
[0035] As Figure 3 and Figure 4As shown, the front moving sleeve 10 and the rear moving sleeve 20 have the same structure, both having a moving ring sleeving portion 101 and a driving component clamping portion 102. Inside the moving ring sleeving portion 101, there is a limiting sliding groove 103, and on the driving component clamping portion 102, there is a driving wheel avoiding groove 104. On both the front moving ring 11 and the rear moving ring 21, there are spiral ring sliding holes 1101. On the outer sides of both the optical structure 3 and the image plane moving structure 4, there are protruding sliding rods 9. The sliding rods 9 pass through the spiral ring sliding holes 1101, and their outer ends can be slidably clamped in the limiting sliding groove 103 of the front moving sleeve 10 or the rear moving sleeve 20.
[0036] It should be noted that: in this embodiment, inside the moving ring sleeving portion 101, there are two symmetrically arranged limiting sliding grooves 103, and the two limiting sliding grooves 103 are open at both ends. On the outer sides of the optical structure 3 and the image plane moving structure 4, there are two symmetrically arranged sliding rods 9; the two sliding rods 9 pass through the spiral ring sliding holes 1101 of the front moving ring 11 or the rear moving ring 21 and can be slidably clamped in the limiting sliding groove 103. When the user needs to adjust the distance between the front end or the rear end of the microscope lens, after selecting the zoom gear, the control system controls the corresponding front-end or rear-end driving component to start, so as to drive the front moving ring 11 or the rear moving ring 21 to rotate. During the rotation of the front moving ring 11 or the rear moving ring 21, it can drive the sliding rod 9 to slide in the spiral ring sliding hole 1101, and further drive the optical structure 3 to move back and forth inside the front moving ring 11, or drive the image plane moving structure 4 to move back and forth inside the rear moving ring 21, so as to realize the adjustment of the distance between the front end or the rear end of the microscope lens, and realize 1 - 16x zoom or 16 - 20x zoom. During installation, when the front moving sleeve 10 is sleeved outside the front moving ring 11, or when the rear moving sleeve 20 is sleeved outside the rear moving ring 21, the front part of the front moving ring 11 or the rear moving ring 21 is located inside the moving ring sleeving portion 101, and the driving component clamping portion 102 is sleeved outside the driving driven wheel 51, while the driving driving wheel 52 is located outside the driving wheel avoiding groove 104 and is in meshing transmission with the driving driven wheel 51 through the driving wheel avoiding groove 104; inside the driving component clamping portion 102, there is also an internal thread or a clamping protrusion or a clamping groove. Between the driving driven wheels 51 of the front driving component 12 and the rear driving component 22, there is a connecting piece. On the outer sides of both ends of the connecting piece, there is an external thread or a clamping groove or a clamping protrusion. When the inner side of the driving component clamping portion 102 of the front moving sleeve 10 or the rear moving sleeve 20 is set as an internal thread, the corresponding end face of the connecting piece is set as a matching external thread. Similarly, when the inner side of the driving component clamping portion 102 of the front moving sleeve 10 or the rear moving sleeve 20 is set as a clamping protrusion or a clamping groove, the corresponding end face of the connecting piece is set as a matching clamping groove or a clamping protrusion, so as to form a detachable fixed connection between the front moving sleeve 10 or the rear moving sleeve 20 and the connecting piece.
[0037] As shown in Figure 2 and Figure 3 shown, the front drive assembly 12 and the rear drive assembly 22 have the same structure, both including a drive driven wheel 51, a drive driving wheel 52 and a drive motor 53. The drive driven wheel 51 is clamped on the outer side of the end of the front moving ring 11 or the rear moving ring 21 and can drive the front moving ring 11 or the rear moving ring 21 to rotate. The drive driving wheel 52 is installed on the output end of the drive motor 53 and is driven by the drive motor 53 to rotate, and forms a meshing drive with the drive driven wheel 51. A limiting bearing 6 is provided on one side of the drive driven wheel 51 facing the front moving ring 11 or the rear moving ring 21, and a linkage 8 is provided on one side of the two drive driven wheels 51 facing each other. A limiting washer 7 is provided between the linkage 8 and the drive driven wheel 51.
[0038] It should be noted that: in this embodiment, the front moving ring 11 and the rear moving ring 21 have the same structure, and driven wheel clamping positions are provided on the outer sides of their rear parts. Key grooves adapted to gear keys are provided on the driven wheel clamping positions. A raised limiting retaining wall is provided on the key groove facing the spiral ring sliding hole. The drive driven wheel 51 is clamped on the driven wheel clamping position, and the gear key is clamped in the key groove, so as to drive the front moving ring 11 or the rear moving ring 21; The limiting bearing 6 is sleeved on the front end and the rear part of the front moving ring 11 or the rear moving ring 21. The limiting bearing 6 located at the rear part is sleeved on one side of the limiting retaining wall facing the spiral ring sliding hole and is located between the front moving ring 11 or the rear moving ring 21 and the front moving sleeve 10 or the rear moving sleeve 20. On the one hand, it is used to bear radial loads or axial loads to ensure the smooth operation of the drive assembly. On the other hand, it can effectively increase the rotation smoothness of the front moving ring 11 or the rear moving ring 21 and avoid abnormal noises generated when the front moving ring 11 or the rear moving ring 21 rotates; The limiting washer 7 is made of a shock-absorbing and wear-resistant material. On the one hand, it can prevent the drive driven wheel 51 from shifting and increase the smoothness of operation. On the other hand, it can effectively reduce the abnormal noises generated by the drive driven wheel 51 during operation, and thus increase the service life of the present utility model.
[0039] As shown in Figure 3 、 Figure 5 and Figure 6As shown, the optical structure 3 includes an outer lens barrel 30, an inner lens barrel 31 and a lens group 32. The outer lens barrel 30 is clamped inside the front moving sleeve 10. The inner lens barrel 31 is installed inside the outer lens barrel 30 by means of a thread. The lens group 32 is installed inside the inner lens barrel 31. A sliding rod 9 is provided on the outer side of the outer lens barrel 30. The lens group 32 includes a first lens 321, a second lens 322, a third lens 323, a fourth lens 324 and a fifth lens 325 arranged in sequence from front to back. The first lens 321 is a double-convex lens convex towards the object side. The second lens 322 is a double-concave lens. The third lens 323 is a meniscus convex lens convex towards the image side. The fourth lens 324 is a double-convex lens. The fifth lens 325 is a meniscus concave lens. A first washer 326 is provided between the first lens 321 and the second lens 322. A second washer 327 is provided between the third lens 323 and the fourth lens 324. A third washer 328 is provided between the fifth lens 325 and the bottom of the inner lens barrel 31. The third washer 328 is installed at the inner bottom of the inner lens barrel 31 by means of a thread.
[0040] It should be noted that in this embodiment, an installation position for the lens group 32 is provided at the inner front part of the outer lens barrel 30. The installation position for the lens group 32 is provided with an internal thread. The outer side surface of the inner lens barrel 31 is provided with an external thread, so that the inner lens barrel 31 can be detachably installed inside the installation position for the lens group 32 of the outer lens barrel 30 by means of a thread. A plurality of lens clamping positions are provided inside the inner lens barrel 31. The first lens 321, the first lens 321, the third lens 323, the fourth lens 324 and the fifth lens 325 are all clamped inside the lens clamping positions. A washer clamping position is provided inside the bottom surface of the inner lens barrel 31. The washer clamping position is provided with an internal thread. The outer surface of the third washer 328 is provided with an external thread and is installed inside the washer clamping position by means of a thread. The setting of the lens group 32 enables the imaging resolution of the present utility model to be adjustable at: 3840×2160, 2592×1944, 2048×1536, 1600×1200, 1280×960, 640×480; which can effectively increase the adjustable flexibility of the resolution of the present utility model.
[0041] As Figure 3 and Figure 5 As shown, the image plane moving structure 4 includes an image plane moving cylinder 40. The image plane moving cylinder 40 is arranged inside the rear moving ring 21. A protruding sliding rod 9 is provided on the outer side of its front end. The sliding rod 9 passes through the rear moving ring 21, and its end part can be slidably clamped inside the inner side of the rear moving sleeve 20.
[0042] It should be noted that: in this embodiment, the image plane moving cylinder 40 is clamped inside the rear moving ring 21 through the sliding rod 9. When the rear driving component 22 drives the rear moving ring 21 to rotate, the image plane moving cylinder 40 can be driven to move back and forth inside the rear moving ring 21, so as to realize the movement of the rear end of the microscope lens, and then the image distance can be changed to achieve 16-20x zoom.
[0043] As Figure 1 and Figure 2 shown, it further includes a lens outer cylinder 13 and a lens housing 14. The lens outer cylinder 13 is sleeved outside the front moving sleeve 10, and the lens housing 14 is sleeved outside the lens outer cylinder 13 and the rear moving structure 2. The lens housing 14 includes a front moving structure mounting portion 1401 and a rear moving structure mounting portion 1402. The front moving structure 1 is mounted inside the front moving structure mounting portion 1401, and the rear moving structure 2 is mounted inside the rear moving structure mounting portion 1402, so that the lens housing 14 is sleeved outside the lens outer cylinder 13.
[0044] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the present invention; any ordinary technical personnel in this industry can smoothly implement the present invention according to the illustrations in the specification and the above description; however, any minor changes, modifications and equivalent changes evolved by those skilled in this professional field without departing from the technical solution of the present invention are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the technical solution of the present invention.
Claims
1. A zoom microscope lens, characterized by: It includes a front moving structure, a rear moving structure, an optical structure and an image plane moving structure. The front moving structure is mounted on the outside of the optical structure, the rear moving structure is mounted on the outside of the image plane moving structure, and the optical structure and the image plane moving structure are arranged front and back, with their center lines located on the same straight line.
2. The zoom microscope lens according to claim 1, characterized in that: The front moving structure includes a front moving sleeve, a front moving ring and a front driving assembly. The front moving ring is sleeved on the outside of the optical structure, the front moving sleeve is sleeved on the outside of the front moving ring, and the front driving assembly is arranged outside the end of the front moving ring and can drive the front moving ring to rotate. The rear moving structure includes a rear moving sleeve, a rear moving ring and a rear driving assembly. The rear moving ring is sleeved on the outside of the image plane moving structure, the rear moving sleeve is sleeved on the outside of the rear moving ring, and the rear driving assembly is arranged outside the end of the rear moving ring and can drive the rear moving ring to rotate.
3. The zoom microscope lens according to claim 2, characterized in that: The front movable sleeve and the rear movable sleeve have the same structure and are both provided with a movable ring sleeve portion and a drive assembly clamping portion. A limiting sliding groove is provided on the inner side of the movable ring sleeve portion, and a drive wheel avoidance groove is provided on the drive assembly clamping portion.
4. The zoom microscope lens according to claim 3, characterized in that: The front moving ring and the rear moving ring are both provided with spiral ring sliding holes, and the outer sides of the optical structure and the image plane moving structure are both provided with protruding sliding rods. The sliding rods pass through the spiral ring sliding holes, and the outer ends thereof can be slidably clamped in the limiting sliding grooves of the front moving sleeve or the rear moving sleeve.
5. The zoom microscope lens according to claim 2, wherein: The front drive assembly and the rear drive assembly have the same structure, both including a driven wheel, a driving wheel and a driving motor. The driven wheel is clamped on the outer side of the end of the front moving ring or the rear moving ring, and can drive the front moving ring or the rear moving ring to rotate. The driving motor is fixed on a motor fixing seat, and the motor fixing seat is fixed on the front moving sleeve or the rear moving sleeve. The driving wheel is installed on the output end of the driving motor, driven to rotate by the driving motor, and forms a meshing transmission with the driven wheel.
6. The zoom microscope lens according to claim 5, characterized in that: A limiting bearing is provided on the side of the driving driven wheel facing the front moving ring or the rear moving ring, a linkage piece is provided on the opposite side of the two driving driven wheels, and a limiting washer is provided between the linkage piece and the driving driven wheel.
7. The zoom microscope lens according to claim 1, wherein: The optical structure includes an outer tube, a mirror mounting tube and a lens group. The outer tube is clamped inside the front movable sleeve, the mirror mounting tube is installed inside the outer tube through threads, the lens group is installed inside the mirror mounting tube, and a sliding rod is provided on the outside of the outer tube.
8. The zoom microscope lens according to claim 7, characterized in that: The lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are arranged in sequence from front to back. The first lens is a doublet-convex lens convex toward the object side, the second lens is a doublet-concave lens, the third lens is a meniscus convex lens convex toward the image side, the fourth lens is a doublet-convex lens, and the fifth lens is a meniscus concave lens. A first washer is provided between the first lens and the second lens, a second washer is provided between the third lens and the fourth lens, and a third washer is provided between the fifth lens and the bottom of the lens mounting barrel. The third washer is threadedly mounted on the bottom of the lens mounting barrel.
9. The zoom microscope lens according to claim 2, wherein: The image plane moving structure includes an image plane moving cylinder, which is arranged inside the rear moving ring. A raised sliding rod is provided on the outer side of its front end. The sliding rod passes through the rear moving ring, and its end portion can be slidably clamped on the inner side of the rear moving sleeve.
10. The zoom microscope lens according to claim 2, characterized in that: The device also includes a lens outer barrel and a lens shell. The lens outer barrel is sleeved on the outside of the front movable sleeve, and the lens shell is sleeved on the outside of the lens outer barrel and the rear movable structure.