Light and dark field switching device suitable for cage type structure

Abstract

The utility model belongs to the technical field of microscopes, particularly relates to a bright and dark field switching device suitable for a cage type structure, and provides the following scheme aiming at the problems that part of the existing bright and dark field switching devices are complicated in operation, need professional training, are easy to operate by mistake, are huge in structure, occupy larger space and the like: the bright and dark field switching device comprises a bottom plate and a side plate, the side plate is fixedly installed on one side of the bottom plate, a light inlet hole is formed in the side plate, and light rays can pass through the light inlet hole; the light and dark field switching device further comprises a sliding block, the sliding block is arranged on the top of the bottom plate in a sliding mode, a first guide rail and a second guide rail are fixedly installed on the top of the bottom plate, according to the light and dark field switching device, rapid switching of the light and dark fields is achieved through the sliding block type design, and the experiment efficiency is improved; meanwhile, the manual operation mode is simple and visual, so that the use difficulty and the learning cost are reduced; the device is compact in structural design and high in compatibility, can be matched with different types of cage type microscopes, and meets the observation requirements of different samples.

Description

Technical Field

[0001] The utility model relates to the technical field of microscopes, in particular to a bright and dark field switching device suitable for a cage-type structure. Background Art

[0002] Throughout the development of microscopy, brightfield illumination, as a traditional illumination method, has significant advantages when observing samples with distinct characteristics such as color and morphology. However, for transparent or translucent samples with small differences in refractive index, brightfield illumination often struggles to clearly visualize sample details and features, limiting its application in certain research areas. To overcome this limitation, darkfield illumination technology emerged. Darkfield illumination utilizes the scattering or diffraction of light by the sample to create an image, allowing sample details to stand out against a dark background. It is particularly suitable for observing tiny particles, defects, and refractive index variations.

[0003] However, the traditional light and dark field switching device still has the following problems in use:

[0004] In the existing technology, the operation of some bright and dark field switching devices is not user-friendly, and the operating steps are relatively complicated. Users need to undergo special training to master them, which increases the difficulty of use and the learning cost, and is also prone to misoperation during operation; and some complex mechanical switching devices are relatively large in structure and will take up more cage microscope space, which may limit the layout and design of other components of the microscope, and is not conducive to the miniaturization and portability of the microscope system.

[0005] In response to the above problems, the present utility model document proposes a light-dark field switching device suitable for a cage structure. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of some light and dark field switching devices in the prior art, such as complex operation, need for professional training, easy misoperation, bulky structure, and large space occupation, and to propose a light and dark field switching device suitable for a cage structure.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A light-dark field switching device suitable for a cage structure, comprising:

[0009] A bottom plate and a side plate, wherein the side plate is fixedly mounted on one side of the bottom plate, and a light inlet is provided inside the side plate for allowing light to pass through;

[0010] The device further comprises a slider, the slider being slidably mounted on the top of the base plate, the top of the base plate being fixedly mounted with a first guide rail and a second guide rail, the slider being slidably mounted between the first guide rail and the second guide rail, and the slider being provided with two optical element mounting holes for mounting the optical element;

[0011] It also includes a light exit hole. A mounting block is fixedly installed at the bottom of the base plate. The mounting block is used to install the objective lens to be used in combination with the base plate. The light exit hole is set inside the mounting block, and one end of the light exit hole passes through the top of the base plate to complete the passage of light.

[0012] In a possible design, the optical element mounting hole consists of a vertical through hole and a horizontal through hole. The vertical through hole vertically passes through the slider, and the horizontal through hole horizontally passes through the slider. One end of the vertical through hole is connected to the horizontal through hole.

[0013] In one possible design, the optical elements include bright-field optical elements and dark-field optical elements; the bright-field optical element includes a plane reflector for reflecting light from the light source directly onto the sample to achieve bright-field illumination; the dark-field optical element includes a specially shaped reflector and a dark-field ring; the dark-field ring is used to block direct central light from the light source so that light can only enter the objective lens from the hollowed-out portion around the periphery; the reflector is used to direct light from the hollowed-out portion onto the sample at a specific angle to achieve dark-field illumination.

[0014] In a possible design, a first limit block and a second limit block are fixedly installed on the top of the base plate. The first limit block and the second limit block are respectively located near the two sides of the base plate to limit the moving range of the slider.

[0015] In a possible design, threaded holes are provided inside the first limit block and the second limit block for installing limit screws to adjustably limit the moving range of the slider.

[0016] In one possible design, the light inlet and light outlet are in the same vertical plane and are perpendicular to each other. The light inlet and light outlet correspond to two optical element mounting holes in the slider to ensure that the light can form a stable optical path after refraction.

[0017] In this application, when it is necessary to switch to the brightfield illumination mode, the user can manually slide the slider to the position of the brightfield optical element, so that the brightfield optical element enters the light path formed between the light inlet and the light outlet. At this time, the light from the light source can be directly irradiated onto the sample after being reflected or transmitted by the brightfield optical element. After that, the light can enter the objective lens to form an image after being reflected by the sample surface.

[0018] When it is necessary to switch to darkfield illumination mode, the user can manually slide the slider to the position of the darkfield optical element again, so that the darkfield optical element enters the light path; at this time, light enters the objective lens through the darkfield optical element, and the emitted light hits the sample at a larger angle. Only light scattered or diffracted by the sample can enter the objective lens, while light that is not scattered cannot enter, thus forming a black background in the image, making the details of the sample stand out against the dark background, thus achieving darkfield illumination;

[0019] When the user pushes the slider to switch the optical element, the first limit block and the second limit block on both sides of the base plate can limit the movement of the slider; to ensure more precise adjustment of the slider, the user can threadably install the limit screws through the threaded holes in the first limit block and the second limit block. By adjusting the extended length of the limit screws, the moving range of the slider can be further adjusted, which is conducive to ensuring a better adjustment effect of the slider.

[0020] Beneficial effects: In the present invention, the light and dark field switching device suitable for a cage structure realizes rapid light and dark field switching through a slider design. The user only needs to slide the slider to complete the switching of the lighting mode in a short time, thereby improving the experimental efficiency.

[0021] In the present invention, the light and dark field switching device suitable for a cage structure ensures the accuracy and stability of the optical path by adopting a high-precision guide rail and slider structure. This design not only improves the imaging quality but also ensures the reliability of the light and dark field switching.

[0022] In the utility model, the light and dark field switching device suitable for a cage-type structure adopts a manual switching method, which is simple and intuitive to operate. Users can easily master the method of use without complicated training, thereby reducing the difficulty of use and learning cost.

[0023] In the utility model, the light and dark field switching device suitable for a cage structure has a compact structure design, occupies a small space, and is compatible with different types of cage microscopes. The light and dark field switching function can be achieved by simply adjusting and installing it appropriately according to the optical path space and the size of the optical elements of the microscope;

[0024] In the present invention, the bright-field and dark-field switching device suitable for a cage-type structure can meet the observation requirements of different samples by installing different optical elements (such as bright-field optical elements and dark-field optical elements). Clear imaging effects can be obtained regardless of whether the sample has obvious color or shape, or is transparent or translucent and has a small difference in refractive index.

[0025] In the utility model, the bright and dark field switching device realizes rapid switching of bright and dark fields through a slider design, thereby improving experimental efficiency; by adopting a high-precision guide rail and slider structure, the optical path is ensured to be accurate and stable, and the imaging quality and switching reliability are improved; at the same time, the manual operation method is simple and intuitive, which reduces the difficulty of use and the learning cost; the device structure is compactly designed and highly compatible, and can be adapted to different types of cage microscopes to meet the observation needs of different samples. Whether it is obvious features or subtle structures, clear imaging can be obtained, providing strong support for scientific research experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional structural diagram of a light-dark field switching device suitable for a cage-type structure proposed by the utility model;

[0027] Figure 2 This is a schematic diagram of the bottom structure of a light and dark field switching device suitable for a cage-type structure proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of a top view of a light and dark field switching device suitable for a cage-type structure proposed by the present invention;

[0029] Figure 4 This is a side view structural diagram of a bright and dark field switching device suitable for a cage-type structure proposed by the utility model.

[0030] In the figure: 1. bottom plate; 2. side plate; 3. light inlet; 4. slider; 5. first limit block; 6. second limit block; 7. light outlet; 8. first guide rail; 9. second guide rail; 10. vertical through hole; 11. horizontal through hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Example 1: Reference Figure 1-4 , a light-dark field switching device, comprising:

[0033] Bottom plate 1 and side plate 2. Side plate 2 is fixed to one side of bottom plate 1 and has a light inlet 3 inside. The design of light inlet 3 allows external light to enter the device smoothly, providing light source for subsequent brightfield and darkfield illumination.

[0034] In this embodiment, a slider 4 is mounted on top of the base plate 1, capable of sliding in a specific direction. To ensure stable sliding of the slider, a first guide rail 8 and a second guide rail 9 are fixedly mounted on the top of the base plate 1, with the slider 4 slidingly mounted between these two rails. This design ensures not only smooth sliding of the slider 4 but also precise movement.

[0035] Specifically, the slider 4 is made of high-precision, low-friction materials, such as aluminum alloy or engineering plastics, to ensure smooth and stable sliding. The design is based on the optical path space and optical component dimensions of the cage microscope, ensuring that the slider 4 can accommodate the required optical components within the limited space and slide smoothly on the guide rail.

[0036] In this embodiment, the guide rails are high-precision linear guides to ensure accurate movement of the slider 4. The guide rails' precision should meet the requirements of optical switching and ensure optical path stability. The guide rails should be securely mounted on the cage microscope frame to prevent shaking or displacement during switching. Specifically, screws or welding can be used for mounting. To reduce friction between the slider and the guide rails and improve smoothness of movement, a suitable lubricant, such as oil or grease, can be applied to the guide rails.

[0037] In this embodiment, two optical component mounting holes are designed within the slider 4. These holes each consist of a vertical through-hole 10 and a horizontal through-hole 11. The vertical through-hole 10 extends vertically through the slider 4, while the horizontal through-hole 11 extends horizontally through the slider 4. One end of these two holes is connected. This design facilitates the installation of optical components within the slider 4, allowing light to pass through these two holes and undergo the necessary refraction and reflection by the optical components.

[0038] Furthermore, the optical element in this embodiment includes a bright field optical element and a dark field optical element.

[0039] Brightfield optics consist of a flat mirror or a light-transmitting lens, which reflects or transmits light from the light source directly onto the sample, achieving brightfield illumination. The reflectivity of the mirror and the transmittance of the light-transmitting lens should be optimized to ensure the intensity and uniformity of brightfield illumination.

[0040] Darkfield optical elements typically consist of a specially shaped reflector and a darkfield ring. The darkfield ring blocks direct central light from the light source, allowing light to enter the objective lens only through the peripheral hollowed-out portion. The reflector is used to direct light from the hollowed-out portion onto the sample at a specific angle, achieving darkfield illumination. The shape and angle of the reflector should be precisely designed to ensure that only light scattered by the sample enters the objective lens, thus achieving the darkfield effect. The optical element should be securely fixed to the slider 4 to prevent displacement or loosening during switching. Fixing can be achieved by screwing, gluing, or clamping.

[0041] In this embodiment, the bright field and dark field driving mode is manual driving, and the user manually moves the slider to switch between the bright field and dark field lighting modes. The manual driving mode is low-cost, simple and reliable.

[0042] In addition, in this embodiment, a mounting block is fixedly mounted on the bottom of the base plate 1. This mounting block is used to assemble the objective lens to be used with the base plate 1. A light exit hole 7 is provided within the mounting block. One end of the light exit hole 7 extends through the top of the base plate 1. This design ensures that light can pass through the light exit hole 7 and smoothly illuminate the sample after completing the necessary refraction and reflection.

[0043] The present application can be used in the field of microscope technology, and can also be used in other fields applicable to the present application.

[0044] Example 2: Reference Figure 1 、 2 , based on the improvement of Example 1: a bright and dark field switching device suitable for a cage structure, which is applied to the field of microscope technology;

[0045] In this embodiment, to ensure the stability of the slider 4 during sliding and to limit its position when necessary, a first limit block 5 and a second limit block 6 are fixedly mounted on the top of the base plate 1. These two limit blocks are located near the sides of the base plate 1 and can limit the range of movement of the slider 4. More specifically, the first limit block 5 and the second limit block 6 each have threaded holes formed inside them for mounting limit screws. By adjusting the position of the limit screws, the range of movement of the slider 4 can be adjusted to meet different usage requirements.

[0046] It's worth noting that the light inlet 3 and light outlet 7 lie in the same vertical plane and are perpendicular to each other. This design not only ensures stable light transmission but also ensures a stable optical path after refraction. Furthermore, both the light inlet 3 and light outlet 7 correspond to the two optical component mounting holes within the slider 4, further ensuring accurate light transmission and refraction.

[0047] The working principle and usage process of this technical solution are as follows:

[0048] When it is necessary to switch to brightfield illumination mode, the user can manually slide the slider 4 to the position of the brightfield optical element, so that the brightfield optical element enters the light path formed between the light inlet 3 and the light outlet 7. At this time, the light from the light source can be directly irradiated onto the sample after being reflected or transmitted by the brightfield optical element. After that, the light can enter the objective lens to form an image after being reflected by the sample surface.

[0049] When it is necessary to switch to darkfield illumination mode, the user can manually slide the slider to the position of the darkfield optical element again, so that the darkfield optical element enters the light path; at this time, light enters the objective lens through the darkfield optical element, and the emitted light hits the sample at a larger angle. Only light scattered or diffracted by the sample can enter the objective lens, while light that is not scattered cannot enter, thus forming a black background in the image, making the details of the sample stand out against the dark background, thus achieving darkfield illumination;

[0050] When the user pushes the slider 4 to switch the optical element, the first limit block 5 and the second limit block 6 on both sides of the base plate 1 can limit the movement of the slider 4; to ensure more precise adjustment of the slider 4, the user can threadably install the limit screws through the threaded holes in the first limit block 5 and the second limit block 6. By adjusting the extended length of the limit screws, the moving range of the slider 4 can be further adjusted, which is conducive to ensuring a better adjustment effect of the slider 4.

[0051] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A light-dark field switching device suitable for a cage structure, characterized in that: include: A bottom plate (1) and a side plate (2), wherein the side plate (2) is fixedly mounted on one side of the bottom plate (1), and a light inlet (3) is provided inside the side plate (2), and the light inlet (3) is used to allow light to pass through; It also includes a slider (4), the slider (4) being slidably arranged on the top of the base plate (1), the top of the base plate (1) being fixedly mounted with a first guide rail (8) and a second guide rail (9), the slider (4) being slidably mounted between the first guide rail (8) and the second guide rail (9), and two optical element mounting holes being provided in the slider (4) for mounting the optical element; The invention also includes a light exit hole (7), a mounting block is fixedly mounted on the bottom of the base plate (1), and the mounting block is used for mounting the objective lens to be used in combination with the base plate (1). The light exit hole (7) is arranged inside the mounting block, and one end of the light exit hole (7) passes through the top of the base plate (1) to complete the passage of light.

2. A light-dark field switching device suitable for a cage-type structure according to claim 1, characterized in that: The optical element mounting hole consists of a vertical through hole (10) and a horizontal through hole (11); the vertical through hole (10) vertically penetrates the slider (4); the horizontal through hole (11) horizontally penetrates the slider (4); and one end of the vertical through hole (10) and the horizontal through hole (11) are connected.

3. The light-dark field switching device suitable for a cage structure according to claim 2, characterized in that: The optical elements include bright field optical elements and dark field optical elements; the bright field optical element includes a plane reflector, which is used to reflect the light from the light source directly onto the sample to achieve bright field illumination; the dark field optical element includes a reflector of a special shape and a dark field ring, the dark field ring is used to block the central direct light from the light source, so that the light can only enter the objective lens from the hollow part of the periphery, and the reflector is used to irradiate the light from the hollow part onto the sample at a specific angle to achieve dark field illumination.

4. The light-dark field switching device suitable for a cage structure according to claim 1, characterized in that: A first limit block (5) and a second limit block (6) are fixedly mounted on the top of the base plate (1); the first limit block (5) and the second limit block (6) are respectively located near two sides of the base plate (1) and are used to limit the movement range of the slider (4).

5. The light-dark field switching device suitable for a cage structure according to claim 4, characterized in that: The first limiting block (5) and the second limiting block (6) are both provided with threaded holes inside for installing limiting screws to adjustably limit the moving range of the slider (4).

6. The light-dark field switching device suitable for a cage structure according to claim 1, characterized in that: The light inlet (3) and the light outlet (7) are located in the same vertical plane and are perpendicular to each other. The light inlet (3) and the light outlet (7) correspond to two optical element mounting holes in the slider (4) to ensure that light can form a stable optical path after refraction.

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