Microobjective for protein detection and method

Abstract

The invention provides a microobjective and method for protein detection, and relates to the technical field of microscopes, the microobjective comprises a first microscope base, a second microscope base, an elastic element mounting groove, a limiting block, a trigger protection block and an elastic element, and the retraction function of the second microscope base after the front end face of the objective is in contact with a protein table top is achieved through the trigger protection block. The elastic element installation groove provides axial limiting and guiding for the second lens base and provides an installation position for the elastic element, and the problems that an existing microscope objective protection measure depends on improvement of the risk prevention awareness of an operator, and the protection purpose cannot be achieved from the objective lens structure optimization direction are solved.

Description

Technical Field

[0001] The invention relates to the technical field of microscopes, and in particular to a microscope objective lens and a method for protein detection. Background Art

[0002] With the rapid development of the biotechnology field, the requirements for detection technologies such as gene detection, protein detection and cell detection are constantly increasing; in the field of protein detection, microscope observation requires precise adjustment of the position and focal length of the objective lens to obtain clear images; however, due to the fragility of protein samples and the precision characteristics of the detection system, improper operation may cause the objective lens to contact the sample, which will significantly reduce the performance of the microscope or even damage the microscope.

[0003] According to data surveys, approximately 5%-10% of protein detection laboratories have reported such incidents, of which more than 60% resulted in varying degrees of objective lens damage. Existing microscope objective lens protection measures rely on improving operators' risk awareness and have not achieved the purpose of protection from the perspective of optimizing the objective lens structure. Therefore, optimizing the microscope objective lens structure for protein detection plays an important role in minimizing the risk of objective lens damage. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a microscope objective lens and method for protein detection.

[0005] A microscope objective lens for protein detection comprises: a lens seat and a lens group, wherein the lens seat comprises a first lens seat and a second lens seat which are arranged in sequence, an end of the first lens seat close to the second lens seat is provided with an elastic element mounting groove and a limit block, an elastic element is provided in the elastic element mounting groove, a guide groove is provided on the limit block, the second lens seat is mounted in cooperation with the elastic element mounting groove, a strip guide block corresponding to the guide groove is provided on the second lens seat, the strip guide block is mounted in cooperation with the guide groove, the lens group comprises a first lens group and a second lens group, the first lens group is mounted in the first lens seat, the second lens group is mounted in the second lens seat, a trigger protection block is provided at one end of the second lens seat away from the first lens seat, a round chamfer structure is provided on the trigger protection block, and the extension length of the trigger protection block is greater than the extension length of the second lens group.

[0006] Furthermore, the first lens group includes a stress absorbing unit and a fourth lens which are arranged in sequence laterally, the fourth lens is arranged in the first lens seat at one end close to the second lens seat, the stress absorbing unit is mounted on the first lens seat, and the stress absorbing end of the stress absorbing unit is in contact with the fourth lens.

[0007] Furthermore, the stress absorbing unit is a first flexible link, a first optical-mechanical interface is arranged on the first flexible link, the first flexible link is mounted on the first lens holder, and the first optical-mechanical interface is in contact with the fourth lens.

[0008] Furthermore, the second lens group includes an axial clamping unit and a sixth lens which are arranged in sequence laterally, the sixth lens is arranged in the second lens holder at one end close to the trigger protection block, the axial clamping unit is mounted on the second lens holder, and the clamping end of the axial clamping unit is in contact with the sixth lens.

[0009] Furthermore, the axial pressing unit is a second flexible link, a second optical-mechanical interface is arranged on the second flexible link, the second flexible link is mounted on the second lens holder, and the second optical-mechanical interface is in contact with the sixth lens.

[0010] Furthermore, the first lens group also includes a first pressure ring, a first lens, a first spacer, a second lens, a second spacer, a third lens and a third spacer which are connected in sequence laterally, the third spacer is connected to the fourth lens, and the first flexible link is installed on the third spacer.

[0011] Furthermore, the second lens group also includes a second pressure ring, a fifth lens and a fourth spacer ring which are connected in sequence laterally, the fourth spacer ring is connected to the sixth lens, and the second flexible link is installed on the fourth spacer ring.

[0012] Furthermore, the microscope objective lens also includes a first outer lens barrel, a second outer lens barrel and a third outer lens barrel, the first outer lens barrel and the third outer lens barrel are both mounted on a first lens seat, the second lens seat is mounted in the third outer lens barrel, the second outer lens barrel is connected to the first outer lens barrel and the third outer lens barrel at the same time, and a through guide groove corresponding to the trigger protection block is provided at one end of the third outer lens barrel close to the trigger protection block, and the trigger protection block is installed in cooperation with the through guide groove.

[0013] Furthermore, the elastic element is a compression spring, the elastic element mounting groove is a spring groove, the spring groove is arranged at one end of the first mirror mount close to the second mirror mount, the compression spring is installed in the spring groove, and the trigger protection block is an extended strip block, which is installed at one end of the second mirror mount away from the first mirror mount.

[0014] The present invention also includes a lens protection method for a microscope objective lens for protein detection. The method is implemented based on a microscope objective lens for protein detection described in any one of the above items. After the trigger protection block comes into contact with the protein table, the trigger protection block drives the second lens seat and the second lens group to move along the elastic element mounting groove toward the direction close to the first lens seat. At the same time, the strip guide block moves along the guide groove toward the direction close to the first lens seat, and the elastic element is compressed to store energy. After the trigger protection block is out of contact with the protein table, the elastic element expands to release energy, and the trigger protection block drives the second lens seat and the second lens group to move along the elastic element mounting groove toward the direction away from the first lens seat. At the same time, the strip guide block moves along the guide groove toward the direction away from the first lens seat, and the second lens seat and the second lens group return to their original positions.

[0015] The technical solution of the present invention has the following advantages: 1. The technical solution provided by the present invention optimizes the structure for the protection function of the microscope lens, realizes the retraction function of the second lens holder after the front end face of the objective lens contacts the protein table by triggering the protection block, and achieves the purpose of protecting the microscope objective lens without introducing redundant stress that may cause damage to the objective lens or reduce the precision. The elastic element mounting groove provides axial limit and guidance for the second lens holder, and provides an installation position for the elastic element. The strip guide block and the guide groove further limit the remaining degrees of freedom of the second lens holder except the axial limit. The round chamfer structure enables the trigger protection block to also lead the objective lens to achieve axial extension and contraction when the microscope objective lens is forced to be displaced in the radial direction. The elastic element stores energy when the second lens holder retracts. After the trigger protection block loses contact with the protein table, the elastic element can expand and release energy to ensure that the second lens holder returns to its original position. The extended length of the trigger protection block is greater than the extended length of the second lens group to ensure that the trigger protection block always contacts the protein table before the second lens group, thereby preventing damage to the second lens group.

[0016] 2. In the technical solution provided by the present invention, the first optical-mechanical interface contacts the fourth lens, causing the first flexible link to generate reverse stress and deform to a corresponding size. The deformation of the first flexible link can reduce the optical surface stress of the fourth lens, while absorbing the axial distributed stress generated by the elastic element pressing the second lens mount after the objective lens is assembled. The first flexible link also provides an axial flexible pressing force for the fourth lens.

[0017] 3. In the technical solution provided by the present invention, the second flexible link provides axial flexible compression support for the sixth lens, while also reducing the optical surface stress of the sixth lens and absorbing the stress on the sixth lens after the objective lens is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the strip guide block and the extended strip block of the present invention; Figure 3 It is a schematic diagram of the guide groove and spring groove structure of the present invention; Figure 4 It is a schematic diagram of the first flexible link and the first optical-mechanical interface structure of the present invention.

[0020] Description of reference numerals: 1-first outer lens barrel; 2-second outer lens barrel; 3-third outer lens barrel; 4-first lens holder; 5-second lens holder; 6-first pressure ring; 7-first lens; 8-first spacer ring; 9-second lens; 10-second spacer ring; 11-third lens; 12-third spacer ring; 13-fourth lens; 14-second pressure ring; 15-fifth lens; 16-fourth spacer ring; 17-sixth lens; 18-compression spring; 19-strip guide block; 20-extended strip block; 21-round chamfer structure; 22-guide groove; 23-spring groove; 24-limiting table; 25-first flexible link; 26-first optical-mechanical interface. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1~Figure 3A microscope objective lens for protein detection shown in the figure comprises: a lens seat and a lens group, the lens seat comprises a first lens seat 4 and a second lens seat 5 which are arranged in sequence, an end of the first lens seat 4 close to the second lens seat 5 is provided with an elastic element mounting groove and a limit block, an elastic element is provided in the elastic element mounting groove, a guide groove 22 is provided on the limit block, the second lens seat 5 is installed in cooperation with the elastic element mounting groove, a strip guide block 19 corresponding to the guide groove 22 is provided on the second lens seat 5, the strip guide block 19 is installed in cooperation with the guide groove 22, the lens group comprises a first lens group and a second lens group, the first lens group is installed in the first lens seat 4, the second lens group is installed in the second lens seat 5, a trigger protection block is provided at one end of the second lens seat 5 away from the first lens seat 4, a 0.5 mm round chamfer structure 21 is provided on the trigger protection block, and the extension length of the trigger protection block is greater than the extension length of the second lens group.

[0026] The above-mentioned protein detection microscope objective lens is structurally optimized for the protection function of the microscope lens. The retraction function of the second lens holder 5 after the front end face of the objective lens contacts the protein table is realized by triggering the protection block. The purpose of protecting the microscope objective lens is achieved without introducing redundant stress that may cause damage to the objective lens or reduce the accuracy. The elastic element mounting groove provides axial limit and guidance for the second lens holder 5, and provides an installation position for the elastic element. The strip guide block 19 and the guide groove 22 further limit the remaining degrees of freedom of the second lens holder 5 except the axial limit. The round chamfer structure 21 enables the microscope objective lens to be forced to move in the radial direction for the protein table when it is subjected to radial displacement. The collision trigger protection block within the 0.5mm area above can also lead the objective lens to achieve axial expansion and contraction. The elastic element stores energy when the second lens holder 5 retracts. After the trigger protection block loses contact with the protein table, the elastic element can expand and release energy to ensure that the second lens holder 5 returns to its original position. The elastic element can also provide a clamping force on the first lens holder 4 and the second lens holder 5 at the same time, thereby constraining the axial translation freedom of the second lens holder 5. The extended length of the trigger protection block is greater than the extended length of the second lens group, which ensures that the trigger protection block always contacts the protein table before the second lens group, thereby preventing damage to the second lens group, that is, preventing damage to the microscope objective lens.

[0027] like Figure 1~Figure 4As shown, in this embodiment, the first lens group includes a stress absorption unit and a fourth lens 13 which are arranged in sequence laterally. The fourth lens 13 is arranged in the first lens seat 4 at one end close to the second lens seat 5. The stress absorption unit is mounted on the first lens seat 4, and the stress absorption end of the stress absorption unit is in contact with the fourth lens 13; the stress absorption unit is specifically a first flexible link 25, and a first optical-mechanical interface 26 is arranged on the first flexible link 25. The first flexible link 25 is mounted on the first lens seat 4, and the first optical-mechanical interface 26 is in contact with the fourth lens 13; the contact between the first optical-mechanical interface 26 and the fourth lens 13 causes the first flexible link 25 to generate reverse stress and deform to a corresponding size. The deformation of the first flexible link 25 can reduce the optical surface stress of the fourth lens 13, and at the same time absorb the axial distributed stress generated by the elastic element pressing the second lens seat 5 after the objective lens is assembled. The first flexible link 25 also provides an axial flexible pressing force for the fourth lens 13.

[0028] like Figure 1~Figure 2 As shown, in this embodiment, the second lens group includes an axial clamping unit and a sixth lens 17 which are arranged in sequence laterally. The sixth lens 17 is arranged in the second lens holder 5 at one end close to the trigger protection block. The axial clamping unit is mounted on the second lens holder 5, and the clamping end of the axial clamping unit is in contact with the sixth lens 17; the axial clamping unit is specifically a second flexible link, and a second optical-mechanical interface is arranged on the second flexible link. The second flexible link is mounted on the second lens holder 5, and the second optical-mechanical interface is in contact with the sixth lens 17; the second flexible link provides axial flexible clamping support for the sixth lens 17, and also reduces the optical surface stress of the sixth lens 17, and absorbs the stress on the sixth lens after the objective lens is assembled. It should be noted that the second flexible link has the same structure as the first flexible link 25, and the second optical-mechanical interface has the same structure as the first optical-mechanical interface 26.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the first lens group also includes Figure 1 The first pressure ring 6, the first lens 7, the first spacer ring 8, the second lens 9, the second spacer ring 10, the third lens 11 and the third spacer ring 12 are connected in sequence along the optical axis, the third spacer ring 12 is connected to the fourth lens 13, and the first flexible link 25 is installed on the third spacer ring 12; the above-mentioned components are tightly connected, wherein the first pressure ring 6 is screwed into the inner wall surface of the first lens holder 4 to press the first lens 7, the first spacer ring 8, the second lens 9, the second spacer ring 10, the third lens 11 and the third spacer ring 12 to ensure the positional relationship between the components and provide axial position limitation; a plurality of first flexible links 25 are evenly distributed in the radial direction of the inner wall surface of the third spacer ring 12, and the specific installation position and quantity of the first flexible links 25 are determined according to actual design and use requirements.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the second lens group also includes Figure 1 As shown in the figure, the second pressure ring 14, the fifth lens 15 and the fourth spacer ring 16 are connected in sequence transversely to the optical axis, the fourth spacer ring 16 is connected to the sixth lens 17, and the second flexible link is installed on the fourth spacer ring 16; the second pressure ring 14 is screwed together with the inner wall surface of the second lens holder 5 to press the fifth lens 15 and the fourth spacer ring 16, to ensure the positional relationship between the fifth lens 15, the fourth spacer ring 16 and the sixth lens 17, and to provide axial position limitation; a plurality of second flexible links are evenly distributed in the radial direction of the inner wall surface of the fourth spacer ring 16, and the specific installation position and quantity of the second flexible links are determined according to the actual design and use requirements.

[0031] like Figure 1~Figure 3 As shown, in the present embodiment, the microscope objective lens further comprises a first outer lens barrel 1, a second outer lens barrel 2 and a third outer lens barrel 3, the first outer lens barrel 1 and the third outer lens barrel 3 are both mounted on a first lens holder 4, the second lens holder 5 is mounted in the third outer lens barrel 3, the second outer lens barrel 2 is connected to the first outer lens barrel 1 and the third outer lens barrel 3 at the same time, an end of the third outer lens barrel 3 close to the trigger protection block is provided with a through guide groove corresponding to the trigger protection block, and the trigger protection block is installed in cooperation with the through guide groove; an external thread is provided on the first outer lens barrel 1, and an internal thread is provided on the second outer lens barrel 2, the external thread on the first outer lens barrel 1 is connected with the internal thread on the second outer lens barrel 2, so as to realize the threaded connection between the first outer lens barrel 1 and the second outer lens barrel 2, the external thread is provided on the third outer lens barrel 3, and the external thread on the third outer lens barrel 3 is connected with the internal thread on the second outer lens barrel 2, so as to realize the third The outer lens barrel 3 and the second outer lens barrel 2 are threadedly connected. Rotating the second outer lens barrel 2 can provide axial displacement adjustment capability. Rotating the third outer lens barrel 3 can also provide axial displacement adjustment capability. The first outer lens barrel 1, the second outer lens barrel 2 and the third outer lens barrel 3 are threadedly connected to each other to form the main frame of the microscope objective lens. In addition, the first outer lens barrel 1, the second outer lens barrel 2 and the third outer lens barrel 3 are all made of aluminum alloy material. The main material of the microscope objective lens is set to aluminum alloy material because aluminum alloy material has good cutting performance and heat dissipation performance, and is suitable for mass production, and is therefore suitable for application to the main frame of the microscope objective lens. Four through guide grooves corresponding to the trigger protection block are radially distributed on one end face of the third outer lens barrel 3 close to the trigger protection block. The trigger protection block is installed in coordination with the through guide groove, and the trigger protection block is slidably set in the through guide groove.

[0032] like Figure 1~Figure 3As shown, in this embodiment, the elastic element is a compression spring 18, and the elastic element mounting groove is a spring groove 23. The spring groove 23 is arranged at one end of the first mirror seat 4 close to the second mirror seat 5, and the compression spring 18 is installed in the spring groove 23. The trigger protection block is an extended strip block 20, and the extended strip block 20 is installed at one end of the second mirror seat 5 away from the first mirror seat 4; the spring groove 23 is used to assemble the compression spring 18, and the spring groove 23 is also used to provide guidance and limit for the second mirror seat 5 when it moves. When the compression spring 18 is in a compressed and clamped state, the compression spring 18 simultaneously provides a clamping force on the first mirror seat 4 and the second mirror seat 5, so as to achieve the purpose of restricting the axial translation freedom of the second mirror seat 5. When the strip guide block 19 is installed in cooperation with the guide groove 22 to achieve nested cooperation, All the degrees of freedom of the second lens holder 5 except the axial displacement are constrained. After being screwed to the optical target position, the first lens holder 4 and the second lens holder 5 are fixed in the first outer lens barrel 1, the second outer lens barrel 2 and the third outer lens barrel 3. The extended length of the extended strip block 20 is greater than the extended length of the second lens group, that is, the end face of the extended strip block 20 is higher than the end face of the sixth lens 17. In the present embodiment, the end face of the extended strip block 20 is 0.2 mm higher than the end face of the sixth lens 17. However, the specific height data can be adjusted accordingly according to the actual design requirements to ensure that the extended strip block 20 always contacts the protein table before the sixth lens 17 and then retracts accordingly, so as to protect the sixth lens 17 and prevent the sixth lens 17 from contacting the protein table and being damaged.

[0033] like Figure 1~Figure 3 As shown, the present invention also includes a lens protection method for a microscope objective lens for protein detection, which is implemented based on a microscope objective lens for protein detection described in any one of the above items. After the trigger protection block contacts the protein table, the trigger protection block drives the second lens holder 5 and the second lens group to move along the elastic element mounting groove toward the direction close to the first lens holder 4. At the same time, the strip guide block 19 moves along the guide groove 22 toward the direction close to the first lens holder 4, and the elastic element compresses and stores energy. After the trigger protection block is out of contact with the protein table, the elastic element expands and releases energy, and the trigger protection block drives the second lens holder 5 and the second lens group to move along the elastic element mounting groove toward the direction away from the first lens holder 4. At the same time, the strip guide block 19 moves along the guide groove 22 toward the direction away from the first lens holder 4, and the second lens holder 5 and the second lens group return to their original positions. Specifically: After the extended strip block 20 comes into contact with the protein table, the extended strip block 20 drives the second lens holder 5 and the second lens group to move along the spring groove 23 toward the first lens holder 4. At the same time, the strip guide block 19 moves along the guide groove 22 toward the first lens holder 4. The internal stress of the microscope objective lens is converted into the elasticity of the compression spring 18. The compression spring 18 compresses and stores energy. After the extended strip block 20 is out of contact with the protein table, and the relative distance of the extended strip block 20 relative to the protein table increases, the compression spring 18 expands and releases energy. The extended strip block 20 drives the second lens holder 5 and the second lens group to move along the spring groove 23 away from the first lens holder 4. At the same time, the strip guide block 19 moves along the guide groove 22 away from the first lens holder 4. The second lens holder 5 and the second lens group return to their original positions. The length of the compression spring 18 in the stress-free state is 10 mm, and the distance between the end face of the second mirror seat 5 close to the first mirror seat 4 and the bottom face of the spring groove 23 is 5 mm. At this time, the length of the compression spring 18 compressed after being installed on the spring groove 23 is 5 mm, and the end face of the limit block and the guide groove 22 provided on the first mirror seat 4 is the limit table 24, and the minimum distance between the limit table 24 and the strip guide block 19 is 3 mm, that is, when the extended strip block 20 drives the second mirror seat 5 and the second lens group to move along the spring groove 23 toward the first mirror seat 4, since the minimum distance between the limit table 24 and the strip guide block 19 is 3 mm, the compression range of the compression spring 18 is limited at this time, and the extended strip block 20 drives the second mirror seat 5 and the second lens group to move along the spring groove 23 toward the first mirror seat 4 The maximum distance is 3 mm, but the above data is only applied in this embodiment, and the specific distance can be adjusted accordingly according to actual design requirements.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A microscope objective lens for protein detection, comprising: A mirror seat and a lens group, characterized in that the mirror seat comprises a first mirror seat (4) and a second mirror seat (5) which are arranged in sequence, an end of the first mirror seat (4) close to the second mirror seat (5) is provided with an elastic element installation groove and a limit block, an elastic element is arranged in the elastic element installation groove, a guide groove (22) is provided on the limit block, the second mirror seat (5) is mounted in cooperation with the elastic element installation groove, a strip guide block (19) corresponding to the guide groove (22) is arranged on the second mirror seat (5), the strip guide block (19) is mounted in cooperation with the guide groove (22), the lens group comprises a first lens group and a second lens group, the first lens group is mounted in the first mirror seat (4), the second lens group is mounted in the second mirror seat (5), a trigger protection block is provided at one end of the second mirror seat (5) away from the first mirror seat (4), a round chamfer structure (21) is provided on the trigger protection block, and the extension length of the trigger protection block is greater than the extension length of the second lens group.

2. A protein detection microscope objective lens according to claim 1, characterized in that: The first lens group comprises a stress absorbing unit and a fourth lens (13) which are arranged in sequence in a transverse direction; the fourth lens (13) is arranged in the first lens seat (4) at one end close to the second lens seat (5); the stress absorbing unit is mounted on the first lens seat (4); and a stress absorbing end of the stress absorbing unit is in contact with the fourth lens (13).

3. A protein detection microscope objective lens according to claim 2, characterized in that: The stress absorbing unit is a first flexible link (25), a first optical-mechanical interface (26) is provided on the first flexible link (25), the first flexible link (25) is mounted on the first lens seat (4), and the first optical-mechanical interface (26) is in contact with the fourth lens (13).

4. A protein detection microscope objective lens according to claim 1, characterized in that: The second lens group comprises an axial pressing unit and a sixth lens (17) which are arranged in sequence in a transverse direction, the sixth lens (17) being arranged in the second lens seat (5) at one end close to the trigger protection block, the axial pressing unit being mounted on the second lens seat (5), and the pressing end of the axial pressing unit being in contact with the sixth lens (17).

5. A protein detection microscope objective lens according to claim 4, characterized in that: The axial pressing unit is a second flexible link, a second optical-mechanical interface is provided on the second flexible link, the second flexible link is mounted on the second lens seat (5), and the second optical-mechanical interface is in contact with the sixth lens (17).

6. A protein detection microscope objective lens according to claim 2, characterized in that: The first lens group further comprises a first pressure ring (6), a first lens (7), a first spacer ring (8), a second lens (9), a second spacer ring (10), a third lens (11) and a third spacer ring (12) which are connected in sequence laterally; the third spacer ring (12) is connected to the fourth lens (13); and the first flexible link (25) is mounted on the third spacer ring (12).

7. A protein detection microscope objective lens according to claim 4, characterized in that: The second lens group further comprises a second pressure ring (14), a fifth lens (15) and a fourth spacer ring (16) which are connected in sequence laterally, the fourth spacer ring (16) is connected to the sixth lens (17), and the second flexible link is mounted on the fourth spacer ring (16).

8. A protein detection microscope objective lens according to claim 1, characterized in that: The microscope objective lens further comprises a first outer lens barrel (1), a second outer lens barrel (2) and a third outer lens barrel (3); the first outer lens barrel (1) and the third outer lens barrel (3) are both mounted on a first lens seat (4); the second lens seat (5) is mounted in the third outer lens barrel (3); the second outer lens barrel (2) is connected to both the first outer lens barrel (1) and the third outer lens barrel (3); a through guide groove corresponding to the trigger protection block is provided at one end of the third outer lens barrel (3) close to the trigger protection block; the trigger protection block is mounted in cooperation with the through guide groove.

9. A protein detection microscope objective lens according to claim 1, characterized in that: The elastic element is a compression spring (18), the elastic element mounting groove is a spring groove (23), the spring groove (23) is arranged at one end of the first mirror seat (4) close to the second mirror seat (5), the compression spring (18) is installed in the spring groove (23), and the trigger protection block is an extension bar block (20), and the extension bar block (20) is installed at one end of the second mirror seat (5) away from the first mirror seat (4).

10. A lens protection method for a protein detection microscope objective lens, the method being implemented based on the protein detection microscope objective lens according to any one of claims 1 to 9, characterized in that: After the trigger protection block comes into contact with the protein table, the trigger protection block drives the second mirror seat (5) and the second lens group to move along the elastic element installation groove in a direction close to the first mirror seat (4), and at the same time, the strip guide block (19) moves along the guide groove (22) in a direction close to the first mirror seat (4), and the elastic element compresses to store energy; after the trigger protection block is no longer in contact with the protein table, the elastic element expands to release energy, and the trigger protection block drives the second mirror seat (5) and the second lens group to move along the elastic element installation groove in a direction away from the first mirror seat (4), and at the same time, the strip guide block (19) moves along the guide groove (22) in a direction away from the first mirror seat (4), and the second mirror seat (5) and the second lens group return to their original positions.

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