Semi-separated zoom objective lens of microscope

Abstract

The invention discloses a semi-separated zoom objective lens of a microscope, which relates to the technical field of microscopes and comprises a first objective lens group, a second objective lens group, a connecting ring, a shading separation blade, an objective lens fixing seat, an objective lens moving seat, an objective lens connecting seat and a focal length adjusting device. According to the invention, the whole zoom objective lens is processed into a semi-separation system through an engraving or cutting process, the zoom objective lens is changed into two relatively independent parts, and the light path is shielded by the shading separation blade, so that stray light interference can be effectively eliminated, the image contrast is improved, and the image quality is improved. The processed semi-separated structure also enables the lens to be disassembled and assembled as a whole, the whole structure is simple and convenient to install and debug, and the objective lens moves as a whole, so that the focal planes of the objective lens through which an observation light path and an illumination light path pass can be ensured to be consistent, and the whole use convenience and use effect are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of microscope technology, specifically to a semi-separable zoom objective lens for microscopes. Background Technology

[0002] The zoom objective is one of the core components of a microscope's optical system. It is usually composed of positive and negative lens groups. By precisely controlling the change in the distance between these two lens groups, the equivalent focal length of the entire objective group is changed, thereby achieving stepless adjustment of the working distance and ensuring that the image plane is clear and stable throughout the zoom process.

[0003] One of the key factors affecting the final image quality during design and assembly is the elimination of stray light. However, in existing technologies, the illumination optical path and the observation optical path usually share the same objective lens. As a result, some stray light enters the observation optical path, which seriously affects the image quality. To address this, some methods use two objective lenses with the same focal length for the illumination and observation optical paths to ensure that the two optical paths are independent. However, with this approach, it is difficult to ensure that the two zoom objective lenses change in unison when changing the working distance, which can also lead to uneven illumination and affect the illumination effect. Furthermore, the completely separate approach not only makes the zoom objective lens assembly structure more complex but also increases the difficulty of assembly and adjustment.

[0004] Based on this, a semi-separable zoom objective lens for microscopes is now provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0005] The purpose of this invention is to provide a semi-separable zoom objective lens for microscopes to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A semi-separable zoom objective lens for a microscope includes a first objective lens group, a second objective lens group, a connecting ring, a light-blocking baffle, an objective lens holder, an objective lens moving base, an objective lens mounting base, and a focus adjustment device.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative: the first objective lens group and the light-blocking plate are both fixedly mounted on the objective lens mount.

[0010] In one alternative: the connecting ring is fixedly mounted on the objective lens mount and is used to connect the objective lens and the primary lens.

[0011] In one alternative: the objective lens mount is fixedly mounted on the objective lens holder, and the objective lens mount is fixedly mounted on the objective lens mount and the focus adjustment device.

[0012] In one alternative: the second objective lens group is fixedly mounted on the objective lens moving base, and both the first and second objective lens groups are processed by a special process to form a partially split semi-separated structure with through grooves on the lens spherical surface.

[0013] In one alternative: the surfaces of both the first and second objective lens groups are machined to create slits for the movement of light-shielding baffles.

[0014] In one alternative, the focus adjustment device employs a worm gear, a staggered helical gear, or a cam structure.

[0015] In one alternative: the special process is carving or cutting.

[0016] In one alternative: the light-shielding baffle is curved and its thickness is less than the width of the through slot.

[0017] In one alternative: the connecting ring connects the objective lens to the primary lens via a bayonet, thread, or screw.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention uses a special process to fabricate a zoom objective lens into a semi-separated system, giving the zoom objective lens two relatively independent parts in the optical path. One part is used for the observation optical path, and the other part is used for the illumination optical path. A light-blocking plate blocks the optical paths, effectively eliminating stray light interference and improving image contrast. The semi-separated structure also allows the lens to be disassembled and assembled as a whole. The overall structure is simple and easy to install and adjust. Furthermore, the fact that the objective lens moves as a whole ensures that the focal planes of the objective lens through which the observation and illumination optical paths pass are consistent, resulting in uniform illumination. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the zoom objective lens structure in an embodiment of the present invention.

[0021] Figure 2 This is an exploded view of the zoom objective lens in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the objective lens assembly before and after processing in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of a light-shielding plate in an embodiment of the present invention.

[0024] Figure 5 This is a schematic projection of the first objective lens group and the second objective lens group in an embodiment of the present invention.

[0025] Figure label annotations:

[0026] 101. First objective lens group; 102. Second objective lens group; 201. Connecting ring; 202. Light-shielding plate; 203. Objective lens holder; 204. Objective lens moving base; 205. Objective lens mounting base; 301. Focus adjustment device; 401. First light-transmitting aperture; 402. Second light-transmitting aperture; 403. Third light-transmitting aperture. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, such as Figure 1 and Figure 2 As shown, the semi-separable zoom objective lens of the microscope includes a first objective lens group 101, a second objective lens group 102, a connecting ring 201, a light-blocking plate 202, an objective lens holder 203, an objective lens moving base 204, an objective lens mounting base 205, and a focus adjustment device 301.

[0029] In this embodiment, the first objective lens group 101 and the second objective lens group 102 are processed by engraving or cutting, thereby enabling the zoom objective lens to be processed into a semi-separated system. This makes the zoom objective lens (i.e., the first objective lens group 101 and the second objective lens group 102) into two relatively independent parts. One part is used for the observation optical path, and the other part is used for the illumination optical path. The optical paths are blocked by a light-shielding plate 202, which can effectively eliminate the interference of stray light and improve the contrast of the image. The semi-separated structure after processing (i.e., the two parts of the first objective lens group 101 and the second objective lens group 102 are not completely separated, but are in a state of partial separation and partial connection) allows the lens to still be disassembled and assembled as a whole, which facilitates the installation and debugging by the staff and effectively improves the overall ease of use of the device.

[0030] In one embodiment, such as Figure 4 As shown, the first objective lens group 101 and the light shield 202 are both fixedly mounted on the objective lens mounting base 203. After the first objective lens group 101 is processed by a special process, a slit parallel to the optical axis of the lens will be generated. At this time, the light shield 202 can pass through this slit, thereby dividing the first objective lens group 101 into two relatively independent parts, one part for observation optical path and the other part for illumination optical path.

[0031] In one embodiment, such as Figure 1 and Figure 2 As shown, the connecting ring 201 is fixedly installed on the objective lens holder 203 and is used to connect the objective lens and the main lens. Through the setting of the connecting ring 201, the objective lens and the main lens can be effectively connected, which makes it easier for users to assemble and use the device as a whole, effectively improving the overall ease of use and assembly of the device.

[0032] In one embodiment, such as Figure 1 and Figure 2 As shown, the objective lens mount 205 is fixedly mounted on the objective lens holder 203. The objective lens mount 205 is fixedly mounted with the objective lens moving seat 204 and the focal length adjustment device 301. By setting the focal length adjustment device 301, the relative displacement between the first objective lens group 101 and the second objective lens group 102 can be realized, thereby effectively adjusting the overall combined focal length of the device and thus changing the overall working distance of the device.

[0033] In one embodiment, such as Figure 1 and Figure 2 As shown, the second objective lens group 102 is fixedly mounted on the objective lens moving base 204. Both the first objective lens group 101 and the second objective lens group 102 are processed by special process to form a partially split semi-separated structure with through grooves on the lens spherical surface. By partially splitting the lens by special process, a slit parallel to the optical axis of the lens will be generated in both the first objective lens group 101 and the second objective lens group 102 after processing. At this time, the light shield 202 can pass through this slit, so that the first objective lens group 101 and the second objective lens group 102 can be divided into two relatively independent parts. One part is used for the observation optical path and the other part is used for the illumination optical path. Moreover, the two parts of the first objective lens group 101 and the second objective lens group 102 are not completely separated, and the connected part can ensure that the lens can still be installed and removed as a whole.

[0034] In one embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the surfaces of the first objective lens group 101 and the second objective lens group 102 are processed to create gaps for the movement of the light-shielding plate 202. The gaps created by the processing allow the light-shielding plate 202 to be easily installed, thereby blocking the light path through the light-shielding plate 202, effectively eliminating the interference of stray light, and effectively improving the contrast of the image.

[0035] In one embodiment, such as Figure 1 and Figure 2 As shown, the focal length adjustment device 301 adopts a worm gear, cross-axis helical gear, or cam structure. In this embodiment, the focal length adjustment device 301 adopts a combination of worm gear, cam, and motor drive. The motor drives the worm gear to rotate, thereby rotating the worm gear. The worm gear is machined with a curved groove, the objective lens holder 205 is machined with a straight groove, and the objective lens moving seat 204 is equipped with a pin. The pin passes through the straight groove on the objective lens holder 205 and the curved groove on the worm gear. Thus, the worm gear, the objective lens moving seat 204, and the objective lens holder 205 form a cam mechanism. When the worm gear rotates, the objective lens moving seat 204 moves along the straight groove direction and has a relative displacement with the first objective lens group 101.

[0036] In one embodiment, such as Figure 3 As shown, the special process is engraving or cutting. The engraving or cutting process is used to process the first objective lens group 101 and the second objective lens group 102, which can make the lens a semi-separated structure, partially separated and partially connected. At the same time, the groove width can also be made to the minimum required width to obtain the maximum light transmission surface.

[0037] In one embodiment, such as Figures 1-5 As shown, the light-shielding plate 202 is arc-shaped and its thickness is slightly less than the width of the slot. The arc-shaped light-shielding plate 202 can better match the curved optical path of the objective lens group, reduce occlusion and reflection in the optical path, and ensure effective separation of the observation optical path and the illumination optical path. Moreover, the arc-shaped light-shielding plate 202 can fit into the gap of the semi-separated structure of the objective lens group, avoiding optical distortion or mechanical interference caused by right-angled edges. The thinner thickness of the light-shielding plate 202 can minimize the occlusion of the optical path, avoid scattering or aberrations introduced by excessive thickness, ensure image clarity, and the thinner light-shielding plate 202 is not easily deformed during the movement of the objective lens, ensuring that the light-shielding plate 202 can accurately pass through the gap of the objective lens group, thereby maintaining the reliability of optical path isolation.

[0038] In one embodiment, such as Figure 1 and Figure 2 As shown, the connecting ring 201 connects the objective lens and the main lens through a bayonet, thread, or screw. The bayonet, thread, or screw method makes it easy for operators to connect the objective lens and the main lens through the connecting ring 201, further improving the connection efficiency and effect between the objective lens and the main lens, and enhancing the overall convenience of the device in the assembly and use process.

[0039] In one embodiment, such as Figure 5 As shown, the first light-transmitting aperture 401 and the second light-transmitting aperture 402 are schematic diagrams of the optical path projection of the primary mirror observation system, and the third light-transmitting aperture 403 is a schematic diagram of the optical path projection of the illumination system.

[0040] The above embodiments disclose a semi-separable zoom objective lens for microscopes. The first objective lens group 101 and the second objective lens group 102 are processed using an engraving process, thereby enabling the zoom objective lens to be processed into a semi-separable system. This transforms the zoom objective lens (i.e., the first objective lens group 101 and the second objective lens group 102) into two parts: one part for the observation optical path and the other for the illumination optical path. A light-blocking plate 202 shields the optical paths, effectively eliminating stray light interference and improving image contrast. The semi-separated structure (i.e., the two parts of the first objective lens group 101 and the second objective lens group 102 are not completely separated, but rather partially separated and partially connected) allows the lens to still be assembled and disassembled as a whole, facilitating installation and debugging by personnel and effectively improving the overall ease of use and assembly of the device.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A semi-separable zoom objective lens for a microscope, characterized in that, It includes a first objective lens group (101), a second objective lens group (102), a connecting ring (201), a light-blocking plate (202), an objective lens holder (203), an objective lens moving base (204), an objective lens mounting base (205), and a focus adjustment device (301).

2. The semi-separable zoom objective lens for microscopes according to claim 1, characterized in that, The first objective lens group (101) and the light-shielding plate (202) are both fixedly mounted on the objective lens holder (203).

3. The semi-separable zoom objective lens for microscopes according to claim 1, characterized in that, The connecting ring (201) is fixedly installed on the objective lens holder (203) and is used to connect the objective lens and the primary lens.

4. The semi-separable zoom objective lens for microscopes according to claim 1, characterized in that, The objective lens mount (205) is fixedly mounted on the objective lens holder (203), and the objective lens mount (204) and the focal length adjustment device (301) are fixedly mounted on the objective lens mount (205).

5. The semi-separable zoom objective lens for microscopes according to claim 4, characterized in that, The second objective lens group (102) is fixedly mounted on the objective lens moving base (204), and both the first objective lens group (101) and the second objective lens group (102) are processed by special process to form a partially split semi-separated structure with through grooves on the lens spherical surface.

6. The semi-separable zoom objective lens for microscopes according to claim 1, characterized in that, The surfaces of the first objective lens group (101) and the second objective lens group (102) are both processed to create gaps for the movement of the light-shielding baffle (202).

7. The semi-separable zoom objective lens for microscopes according to claim 4, characterized in that, The focal length adjustment device (301) adopts a worm gear, staggered shaft helical gear or cam structure.

8. The semi-separable zoom objective lens for microscopes according to claim 5, characterized in that, The special process is carving or cutting.

9. The semi-separable zoom objective lens for microscopes according to claim 1, characterized in that, The light-shielding plate (202) is arc-shaped and has a thickness of less than 0.5 mm.

10. The semi-separable zoom objective lens for microscopes according to claim 3, characterized in that, The connecting ring (201) connects the objective lens and the primary lens by means of a bayonet, thread or screw.

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