Microscope structure
By using the threaded connection structure of the front and rear mirror frames and the design of limiting and fastening pins, the imaging problem of microscope objectives under the thickness difference of the carrier is solved, achieving high-precision focusing and stability, and reducing cost and complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN LEADING OPTICS
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-19
AI Technical Summary
Existing microscope objective structures cannot effectively adjust to changes in the back focal length caused by differences in carrier thickness, affecting image clarity. Furthermore, existing focusing ring structures suffer from high-precision assembly requirements, complex structures, high costs, and insufficient stability.
The front and rear lens frames are connected by a threaded structure, combined with the design of limiting pins and fastening pins, to achieve focal length adjustment and fixation, ensuring the coaxiality and stability of the optical lens and preventing loosening and displacement.
It achieves high-precision focusing capability for microscopes, reduces processing and assembly costs, improves imaging quality and stability, and simplifies the assembly process.
Smart Images
Figure CN224263471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lens technology, specifically to a microscope structure. Background Technology
[0002] In existing microscope objective lens designs, traditional frames generally employ a one-piece fixed structure, with a completely fixed focal length. However, in practical applications, microscopes often require the use of planar surfaces (such as glass slides, petri dishes, etc.). Differences in the thickness of these surfaces can cause variations in the lens's back focal length (BFL), thus affecting image sharpness. Because traditional structures lack effective adjustment mechanisms, they cannot compensate for BFL variations through structural adjustments, resulting in limited observation accuracy.
[0003] The current mainstream solution involves placing a focusing ring in the center of the microscope objective. The focusing ring connects to the lens group inside the lens via a threaded or sliding mechanism. Users can adjust the focus by rotating the focusing ring to change the distance between the optical lens group and the image plane. While this design solves the imaging problems caused by changes in BFL (Browser-Fluid Length), it faces significant technical challenges:
[0004] High-precision assembly requirements: As a core optical component, microscope objectives require extremely high precision (typically at the micrometer level) in parameters such as optical axis coaxiality and lens spacing. The threaded or sliding mechanism of the correction ring must be precisely matched with the lens assembly; any assembly error may lead to optical axis misalignment or increased aberrations, severely affecting image quality.
[0005] Structural sensitivity and cost issues: To meet the high-precision adjustment requirements, the machining accuracy of the calibration ring and related components must be controlled within 0.01mm, leading to a significant increase in processing difficulty and manufacturing costs. Simultaneously, the complex adjustable structure increases the overall mechanical sensitivity of the objective lens, making it prone to loosening and displacement under long-term use or vibration environments, further affecting observation stability.
[0006] In summary, existing focus adjustment structures for correction rings suffer from drawbacks such as complex structure, high precision dependence, high cost, and insufficient stability when dealing with changes in BFL. There is an urgent need for an improved solution that can achieve flexible focus adjustment while ensuring high-precision assembly and stable performance. Utility Model Content
[0007] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a microscope structure to solve the problems mentioned in the background section above.
[0008] This utility model is achieved through the following technical solution:
[0009] A microscope structure includes a front frame and a rear frame. The front frame has a plurality of front optical lenses, and the rear frame has a plurality of rear optical lenses. The front frame and the rear frame are connected by a threaded structure. The structure also includes a plurality of limiting pins and fastening pins for connecting the front frame and the rear frame. The limiting pins are used to limit the movement of the front frame and the rear frame. When the front frame and the rear frame are adjusted to the required focal length by the threaded structure, they are fixed by tightening the fastening pins.
[0010] Furthermore, the mating surface accuracy of the front lens frame for mating with the front optical lens group is 0.01mm~0.015mm; the mating surface accuracy of the rear lens frame for mating with the rear optical lens group is 0.01mm~0.015mm.
[0011] Furthermore, the thread structure is a multi-start thread.
[0012] Furthermore, the front mirror frame is provided with an external thread, and the rear mirror frame is provided with an internal thread that connects to the external thread.
[0013] Furthermore, the front mirror frame is provided with a first step, a second step and a third step from the inside to the outside. The second step is provided with the external thread, and the outer circumferential surface of the third step is provided with a circumferential array of limiting grooves. The limiting pin is threadedly connected to the rear mirror frame and embedded in the limiting groove. The fastening pin passes through the rear mirror frame and is embedded in the thread groove of the external thread.
[0014] Furthermore, the rear mirror frame is provided with a first fastening part, a second fastening part, and a third fastening part that sequentially engage with the first step, the second step, and the third step, and the internal thread is provided on the inner circumferential surface of the second fastening part.
[0015] Furthermore, the fitting accuracy between the first step and the first fastening part is 0.01mm~0.015mm.
[0016] Furthermore, the front and rear mirror frames are made of 6001-T6 aluminum alloy.
[0017] The beneficial effects of this utility model are as follows: A microscope structure includes a front frame and a rear frame. The front frame is provided with a plurality of front optical lenses, and the rear frame is provided with a plurality of rear optical lenses. The front and rear frames are connected by a threaded structure. The structure also includes a plurality of limiting pins and fastening pins for connecting the front and rear frames. The limiting pins restrict the movement of the front and rear frames. When the front and rear frames are adjusted to the desired focal length via the threaded structure, they are fixed by tightening the fastening pins. The limiting pins restrict the movement of the front and rear frames, and the fastening pins determine their positions. This structure ensures good coaxiality between the front and rear frames, thus meeting the assembly sensitivity requirements of each optical lens group, while also providing a certain focusing capability. Furthermore, this structure eliminates the need for a calibration ring to adjust the objective lens, reducing mold and assembly costs. Attached Figure Description
[0018] Figure 1 This is a perspective view of the present invention.
[0019] Figure 2 This is a cross-sectional view of the present invention.
[0020] Figure 3 This is an exploded view of the present invention.
[0021] The above figures include the following reference numerals:
[0022] 1. Front lens frame; 11. First step; 12. Second step; 121. External thread; 13. Third step; 131. Limiting groove; 2. Rear lens frame; 21. First fastening part; 22. Second fastening part; 221. Internal thread; 23. Third fastening part; 3. Front optical lens; 4. Rear optical lens; 5. Limiting pin; 6. Fastening pin. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is intended to aid in understanding this utility model, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0024] Reference Figures 1 to 3As shown, a microscope structure includes a front frame 1 and a rear frame 2. The front frame 1 is provided with a plurality of front optical lenses 3, and the rear frame 2 is provided with a plurality of rear optical lenses 4. The front frame 1 and the rear frame 2 are connected by a threaded structure. The microscope also includes a plurality of limiting pins 5 and fastening pins 6 for connecting the front frame 1 and the rear frame 2. The limiting pins 5 are used to limit the movement of the front frame 1 and the rear frame 2. When the front frame 1 and the rear frame 2 are adjusted to the required focal length by the threaded structure, they are fixed by tightening the fastening pins 6.
[0025] When focusing is required, the front lens frame 1 is rotated, causing it to move back and forth along the central axis of the rear lens frame 2. During this movement, the distance between the front optical lens group 3 and the rear optical lens group 4 changes, thus achieving focusing. Once the front lens frame 1 and rear lens frame 2 are adjusted to the desired focal length via the threaded structure, they are secured by tightening the fastening pin 6. Furthermore, the limiting pin 5 restricts the travel of the front lens frame 1 and rear lens frame 2, preventing the front lens frame 1 from completely detaching from the rear lens frame 2 during user rotation.
[0026] The above structure ensures that the front lens frame 1 and the rear lens frame 2 have good coaxiality, thereby meeting the assembly sensitivity requirements of each group of optical lenses, while providing a certain focusing capability. At the same time, this structure does not require the installation of a correction ring to adjust the objective lens, reducing mold opening and assembly costs.
[0027] The mating surface accuracy of the front frame 1, which mates with the front optical lens 3, is 0.01mm to 0.015mm; the mating surface accuracy of the rear frame 2, which mates with the rear optical lens 4, is also 0.01mm to 0.015mm. By controlling the mating surface accuracy of the front frame 1 and the front optical lens 3, and the rear frame 2 and the rear optical lens 4, within 0.01mm to 0.015mm, the precise positioning of the optical lenses within the frames can be ensured, effectively reducing lens shift or tilting caused by mating gaps. This improves the coaxiality and stability of the optical system, ultimately achieving high definition and high resolution in microscope imaging.
[0028] The thread structure is a multi-start thread. The multi-start thread structure significantly improves thread transmission efficiency, making the engagement of the front lens frame 1 and the rear lens frame 2 smoother and faster. It also reduces operating torque, allowing users to quickly adjust the focal length or position of the optical system, meeting the high-efficiency adjustment requirements of microscopes in precision observation scenarios.
[0029] The front lens frame 1 is provided with an external thread 121, and the rear lens frame 2 is provided with an internal thread 221 that connects to the external thread 121. Through the above design, a standardized threaded connection structure is formed, which facilitates the batch processing and assembly of parts, and enables the coaxial positioning of the front and rear lens frames 2 through threaded engagement, ensuring that the optical axis height of the front optical lens 3 and the rear optical lens is aligned, and avoiding optical path offset problems caused by assembly errors.
[0030] The front mirror frame 1 is provided with a first step 11, a second step 12, and a third step 13 from the inside out. The second step 12 has an external thread 121, and the outer circumferential surface of the third step 13 has a circular array of limiting grooves 131. The limiting pin 5 is threadedly connected to the rear mirror frame 2 and embedded in the limiting groove 131. The fastening pin 6 passes through the rear mirror frame 2 and is embedded in the thread groove of the external thread 121. The limiting groove 131 and the limiting pin 5 cooperate to prevent the circumferential rotation of the front mirror frame 1 and also prevent the front mirror frame 1 and the rear mirror frame 2 from completely separating. The fastening pin 6 embedded in the thread groove can enhance the axial locking force, effectively preventing loosening or displacement between the front mirror frame 1 and the rear mirror frame 2 during long-term use or under vibration, ensuring the stability and reliability of the optical system.
[0031] Furthermore, the rear lens frame 2 is provided with a first engaging part 21, a second engaging part 22, and a third engaging part 23 that sequentially engage with the first step 11, the second step 12, and the third step 13. The internal thread 221 is provided on the inner circumferential surface of the second engaging part 22. The multi-stage engaging parts of the rear lens frame 2 correspond one-to-one with the stepped structure of the front lens frame 1, forming a layered positioning guide. This not only simplifies the assembly process but also meets the assembly sensitivity requirements of each group of lenses through the coaxiality of the front lens frame 1 and the rear lens frame 2.
[0032] The fitting accuracy of the first step 11 and the first fastening part 21 is 0.01mm~0.015mm. The high-precision fitting of the first step 11 and the first fastening part 21 provides a precise axial and radial positioning reference for the assembly of the front lens frame 1 and the rear lens frame 2, ensuring that the optical axis deviation between the front optical lens group 3 and the rear optical lens group is controlled within a very small range, thereby avoiding aberration problems caused by optical axis offset and further optimizing the imaging quality of the microscope.
[0033] Furthermore, the front frame 1 and rear frame 2 are made of 6001-T6 aluminum alloy. Choosing 6001-T6 aluminum alloy for the front frame 1 and rear frame 2 leverages its lightweight, high strength, and excellent corrosion resistance. This significantly reduces the overall weight of the microscope while ensuring the structural strength and rigidity of the frame, facilitating handheld operation or equipment movement. Simultaneously, the excellent machinability of aluminum alloy meets the high-precision machining requirements of complex structures such as multi-step structures and precision threads, ensuring the assembly accuracy of the optical system.
[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0035] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.
[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A microscope structure, characterized in that: The device includes a front lens frame (1) and a rear lens frame (2). The front lens frame (1) is provided with a plurality of front optical lenses (3), and the rear lens frame (2) is provided with a plurality of rear optical lenses (4). The front lens frame (1) and the rear lens frame (2) are connected by a threaded structure. The device also includes a plurality of limiting pins (5) and fastening pins (6) for connecting the front lens frame (1) and the rear lens frame (2). The limiting pins (5) are used to limit the movement of the front lens frame (1) and the rear lens frame (2). When the front lens frame (1) and the rear lens frame (2) are adjusted to the required focal length by the threaded structure, they are fixed by tightening the fastening pins (6).
2. The microscope structure according to claim 1, characterized in that: The front lens frame (1) has a mating surface accuracy of 0.01mm to 0.015mm for mating with the front optical lens group (3); the rear lens frame (2) has a mating surface accuracy of 0.01mm to 0.015mm for mating with the rear optical lens group (4).
3. The microscope structure according to claim 1, characterized in that: The thread structure is a multi-start thread.
4. The microscope structure according to claim 1, characterized in that: The front mirror frame (1) is provided with an external thread (121), and the rear mirror frame (2) is provided with an internal thread (221) that connects to the external thread (121).
5. A microscope structure according to claim 4, characterized in that: The front mirror frame (1) is provided with a first step (11), a second step (12) and a third step (13) from the inside to the outside. The second step (12) is provided with the external thread (121). The outer circumferential surface of the third step (13) is provided with a circumferential array of limiting grooves (131). The limiting pin (5) is threadedly connected to the rear mirror frame (2) and embedded in the limiting groove (131). The fastening pin (6) passes through the rear mirror frame (2) and is embedded in the thread groove of the external thread (121).
6. A microscope structure according to claim 5, characterized in that: The rear mirror frame (2) is provided with a first fastening part (21), a second fastening part (22) and a third fastening part (23) that sequentially engage with the first step (11), the second step (12) and the third step (13), and the internal thread (221) is provided on the inner circumferential surface of the second fastening part (22).
7. A microscope structure according to claim 6, characterized in that: The fitting accuracy of the first step (11) and the first fastening part (21) is 0.01mm~0.015mm.
8. A microscope structure according to claim 1, characterized in that: The front mirror frame (1) and the rear mirror frame (2) are made of 6001-T6 aluminum alloy.