Dichroic mirror light extinction assembly and microscope

Abstract

The utility model provides a dichroic mirror extinction subassembly and microscope, this dichroic mirror extinction subassembly includes: optical function area, forms in optical function area one side and is fixed by adjustable mirror seat first side area, and with first side area commonly surrounds the peripheral area of optical function area, adjustable mirror seat covers the installation gap between first side area and the inner wall of shell, and the mounting gap between the inner wall of shell and the peripheral area is covered for the shielding structure, there is the set distance between the shielding structure and the peripheral area along the direction perpendicular to the plane where the dichroic mirror is, and the set distance is greater than the maximum displacement of the peripheral area when the dichroic mirror rotates around the preset axle. The dichroic mirror extinction subassembly and microscope disclosed by the utility model realize the mounting gap between the dichroic mirror and the main cavity of the microscope, block the interference of light leakage to the light path, and can also adapt to the adjustment requirement of the inclination angle of the dichroic mirror.

Description

Technical Field

[0001] This utility model relates to the field of microscope technology, and in particular to a dichroic mirror extinction component and microscope. Background Technology

[0002] In microscope optical systems, dichroic mirrors serve as beam-splitters separating excitation and emission light, and their installation accuracy directly impacts image quality. In actual assembly, the dichroic mirror must be installed within the microscope's main cavity (the cavity used to fix optical elements). However, due to limitations in manufacturing precision, a tight fit within the main cavity is impossible, inevitably resulting in installation gaps. These gaps lead to light leakage; some illumination light penetrates the gap, interfering with both the imaging and illumination light paths. This not only reduces image contrast but also affects illumination uniformity, ultimately degrading image quality.

[0003] In the prior art, to solve the above-mentioned problem of light leakage through installation gaps, light-blocking plates, adhesive light-blocking gaskets, and integrally molded sealing frames are usually used to seal the installation gaps to block light leakage. However, when it is necessary to adjust the tilt angle of the dichroic mirror, since the position of the blocking component is not adjustable, the blocking component needs to be disassembled to avoid obstructing the adjustment. Moreover, when the blocking component is reassembled after adjustment, the positional deviation of the blocking component can easily cause the dichroic mirror to be indirectly pushed off course by the assembly pressure, causing the tilt angle of the calibrated dichroic mirror to deviate again.

[0004] It should be noted that the above description of the background technology is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background technology section of this utility model. Utility Model Content

[0005] The purpose of this invention is to disclose a dichroic mirror extinction component and a microscope, which solves many defects in the existing technology where the shielding component is insufficient in light blocking and hinders the adjustment of the dichroic mirror tilt angle. In particular, it aims to block the installation gap between the dichroic mirror and the main cavity of the microscope, block the interference of light leakage on the optical path, and adapt to the adjustment requirements of the dichroic mirror tilt angle.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a dichroic mirror extinction assembly, comprising: a housing with an internal cavity, an adjustable mirror base disposed in the housing and capable of rotating the dichroic mirror around a preset axis to fix the dichroic mirror at a set angle within the cavity, and a shielding structure disposed between the dichroic mirror and the side wall of the housing;

[0007] The dichroic mirror includes: an optical functional area, a first side area formed on one side of the optical functional area and fixed by the adjustable mirror base, and a peripheral area that surrounds the optical functional area together with the first side area.

[0008] The adjustable mirror mount covers the mounting gap between the first side area and the inner wall of the housing, and the shielding structure is used to cover the mounting gap between the peripheral area and the inner wall of the housing.

[0009] There is a set distance between the shielding structure and the peripheral area along a direction perpendicular to the plane where the dichroic mirror is located. The set distance is greater than the maximum displacement of the peripheral area when the dichroic mirror rotates around the preset axis.

[0010] As a further improvement of this utility model, the shielding structure is disposed on the side of the peripheral area opposite to the incident direction of the illumination light.

[0011] As a further improvement of this utility model, the shielding structure extends circumferentially from the peripheral area toward the inner wall of the housing, and at least covers the installation gap between the peripheral area and the inner wall of the housing.

[0012] As a further improvement of this utility model, the peripheral area includes a second side area, a third side area, and a fourth side area distributed circumferentially around the optical functional area.

[0013] The shielding structure includes a second shielding part, a third shielding part, and a fourth shielding part corresponding to the second side area, the third side area, and the fourth side area, respectively, and the second shielding part, the third shielding part, and the fourth shielding part respectively cover the installation gap between the inner wall of the housing and the second side area, the third side area, and the fourth side area.

[0014] As a further improvement of this utility model, the dichroic mirror extinction assembly further includes a fixing part, which is detachably disposed on the side wall of the housing relative to the adjustable mirror base, or the fixing part is integrally formed with the side wall of the housing relative to the adjustable mirror base, and the fixing part extends toward the peripheral area to form the blocking structure.

[0015] As a further improvement of this utility model, the edge of the adjustable mirror mount extends toward the side wall of the housing to cover the installation gap between the first side area and the inner wall of the housing, and together with the shielding structure, covers the circumferential installation gap between the dichroic mirror and the side wall of the housing.

[0016] As a further improvement of this utility model, the adjustable mirror mount includes: a movable part that rotates about the preset axis relative to the side wall of the housing, the movable part being configured to fit closely with the edge of the first side area, and a fixing structure disposed on the movable part for pressing the first side area against the positioning surface.

[0017] As a further improvement of this utility model, the fixing structure includes: a limiting block formed on the movable part and protruding on one side of the positioning surface in a direction perpendicular to the positioning surface; a movable block movably disposed on the movable part relative to the limiting block; and a rotating rod passing through the movable block and extending into the limiting block.

[0018] The movable block is configured to move on the positioning surface by rotating the rotary rod, so as to cooperate with the limiting block to clamp and fix the first side area.

[0019] As a further improvement of this utility model, the movable block is formed on the side of the first side area facing the incident direction of the illumination light, and at least covers part of the first side area, and there is a gap between the movable block and the second shielding part along the direction of the plane where the dichroic mirror is located.

[0020] The limiting block is formed on the side of the first side area opposite to the direction of incident illumination light, and at least covers part of the first side area. There is a gap between the limiting block and the fourth shielding part along the direction of the plane where the dichroic mirror is located.

[0021] Secondly, this utility model also provides a microscope, including: a dichroic mirror extinction component as described in any one of the first aspects.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: By covering the installation gap between the peripheral area and the inner wall of the housing with a shielding structure, illumination light that has not passed through the optical functional area can be blocked from entering the imaging optical path through the installation gap. Simultaneously, by covering the installation gap between the first side area and the inner wall of the housing with an adjustable mirror mount, a full-circumferential light leakage blockage is achieved for the dichroic mirror. The adjustable mirror mount drives the dichroic mirror to rotate around a preset axis to adjust the tilt angle of the dichroic mirror. During the adjustment process, a preset distance greater than the maximum displacement of the peripheral area, provided between the shielding structure and the peripheral area, allows the dichroic mirror to rotate freely without contacting the shielding structure, thus preventing the adjustment from getting stuck. Furthermore, the shielding structure only targets the peripheral area of ​​the non-optical region on the dichroic mirror and maintains coverage of the installation gap before and after adjustment, preventing any impact on the incident or emitted light transmission of the optical functional area and ensuring that the dichroic mirror can stably maintain the calibration angle after adjustment. Attached Figure Description

[0023] Figure 1is a schematic diagram of the dichroic mirror light extinction component disclosed by the present utility model;

[0024] Figure 2 is a schematic diagram of the connection between the fixing portion and the shielding structure;

[0025] Figure 3 is a sectional view of a cut housing and a dichroic mirror;

[0026] Figure 4 is a sectional view of the cut housing and the dichroic mirror from another perspective. Detailed Description of the Embodiments

[0027] The present utility model will be described in detail below with reference to the embodiments shown in the accompanying drawings. It should be noted that these embodiments do not limit the present utility model. Any equivalent transformation or substitution in function, method or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0028] The accompanying drawings of the present utility model are not strictly drawn to actual scale, and the specific dimensions of each structure can be determined according to actual needs. The accompanying drawings described in the present utility model are only structural schematic diagrams. The lines shown in the description drawings of the present utility model can be understood as components with a certain actual thickness.

[0029] Please refer Figures 1 to 4 discloses a specific embodiment of a dichroic mirror light extinction component and a microscope.

[0030] Referring Figures 1 to 4 , in this embodiment, the dichroic mirror light extinction component 100 includes: a housing 10, an adjustable mirror base 30, and a shielding structure 42.

[0031] A cavity 11 is formed inside the housing 10. The adjustable mirror base 30 is disposed on the housing 10 and can drive the dichroic mirror 20 to rotate around a preset shaft 34, so as to fix the dichroic mirror 20 in the cavity 11 at a set angle. The shielding structure 42 is arranged between the dichroic mirror 20 and the side wall of the housing 10. The dichroic mirror 20 includes: an optical functional region 21, a first side region 221 formed on one side of the optical functional region 21 and fixed by the adjustable mirror base 30, and a peripheral region 22 that together surrounds the optical functional region 21 with the first side region 221; the adjustable mirror base 30 covers the installation gap between the first side region 221 and the inner wall of the housing 10, and the shielding structure 42 is used for covering the installation gap between the peripheral region 22 and the inner wall of the housing 10; there is a set distance H between the shielding structure 42 and the peripheral region 22 along a direction perpendicular to the plane where the dichroic mirror 20 is located, and the set distance H is greater than the maximum displacement of the peripheral region 22 when the dichroic mirror 20 rotates around the preset shaft 34.

[0032] In existing technologies, to solve the problem of light leakage through installation gaps, light-blocking plates, adhesive light-blocking pads, and other shielding components are typically used to seal the gaps. However, when adjusting the tilt angle of the dichroic mirror, the shielding components need to be disassembled, and after reassembly, the dichroic mirror is prone to shifting or becoming inaccurate due to positional deviations or assembly pressure. The dichroic mirror extinction assembly 100 disclosed in this invention, when the microscope starts working, directs the illumination light along a set direction (e.g., ...). Figure 3 Illumination light (in the direction indicated by the middle arrow R) is incident on the dichroic mirror 20. During the imaging process, the illumination light shines on the optical functional area 21 of the dichroic mirror 20. The excitation light of a specific wavelength is reflected by the optical functional area 21 to the sample and excites it to generate emission light. The emission light then passes through the optical functional area 21 and enters the imaging optical path (not shown). During this process, the installation gap between the peripheral area 22 and the inner wall of the housing 10 is covered by the shielding structure 42, which can block the illumination light that has not passed through the optical functional area 21 from entering the imaging optical path through the installation gap. At the same time, the installation gap between the first side area 221 and the inner wall of the housing 10 is covered by the adjustable mirror mount 30, so as to form a full circumferential light leakage blockage for the dichroic mirror 20. Compared with the shielding components of the prior art, the dichroic mirror extinction component 100 disclosed in this utility model provides more comprehensive light shielding.

[0033] When existing optical detection methods reveal that the angle between the dichroic mirror 20 and the microscope's principal optical axis S deviates by 45°, the adjustable mount 30 is controlled to rotate the dichroic mirror 20 around a preset axis 34 to adjust its tilt angle. During adjustment, because the pre-set distance H between the blocking structure 42 and the peripheral area 22 is greater than the maximum displacement of the peripheral area 22 (i.e., the maximum offset of the peripheral area 22 in the direction perpendicular to the plane of the dichroic mirror 20 formed by its arc-shaped trajectory movement), the dichroic mirror 20 can rotate freely without contacting the blocking structure 42, thus preventing adjustment jamming. Simultaneously, the blocking structure 42 only covers the peripheral area 22 of the non-optical region on the dichroic mirror 20 and maintains coverage of the installation gap before and after adjustment, preventing interference with the illumination incident or emitted light transmission of the optical functional area 21 and ensuring that the dichroic mirror 20 can stably maintain its calibration angle after adjustment.

[0034] In some examples, the parameter Figure 3 As shown, the blocking structure 42 is disposed on the side of the peripheral area 22 opposite to the direction of incidence of the illumination light. The illumination light travels along... Figure 3When light is incident on the optical functional area 21 of the dichroic mirror 20 in the direction indicated by the middle arrow R, some edge spillage light and stray light will diffuse to the peripheral area 22. The side of the peripheral area 22 opposite to the incident direction is the imaging side where the emitted light enters the imaging optical path. By setting a shielding structure 42 on the side of the peripheral area 22 opposite to the incident direction, the light leaking to the peripheral area 22 can be directly intercepted, preventing it from intruding into the imaging optical path. At the same time, by setting a shielding structure 42 on the side of the peripheral area 22 opposite to the incident direction, the illumination light incident on the optical functional area 21 will not be blocked, nor will the emitted light transmitted from the optical functional area 21 be blocked. It only has a shielding effect on the non-optical area of ​​the peripheral area 22. In addition, a sufficient set distance H is reserved between the shielding structure 42 and the peripheral area 22 to ensure that the peripheral area 22 will not contact the shielding structure 42 when the dichroic mirror 20 is rotated and adjusted around the preset axis 34. This avoids the adjustment getting stuck and ensures that the shielding structure 42 is always aligned with the installation gap before and after adjustment, maintaining a stable light-blocking effect.

[0035] In some examples, the shielding structure 42 extends circumferentially from the peripheral area 22 toward the inner wall of the housing 10, and at least covers the mounting gap between the peripheral area 22 and the inner wall of the housing 10. By extending circumferentially from the peripheral area 22 toward the inner wall of the housing 10, the shielding structure 42 corresponds to the circumferential distribution of the peripheral area 22 around the optical functional area 21 and adapts to the width of the mounting gap, ensuring that it at least covers the mounting gap. This allows light leakage from the optical functional area 21 to the peripheral area 22 to be intercepted by the shielding structure 42 throughout the entire circumferential range. At the same time, the shielding structure 42 may extend appropriately beyond the mounting gap in the extension direction to accommodate gap position deviations that may occur during processing or assembly, and to avoid light-shielding failure due to gap position deviations.

[0036] In some examples, the parameter Figures 1 to 4As shown, the peripheral area 22 includes a second side area 222, a third side area 223, and a fourth side area 224 distributed circumferentially around the optical functional area 21; the first side area 221, the second side area 222, the third side area 223, and the fourth side area 224 are connected sequentially. The shielding structure 42 includes a second shielding portion 422, a third shielding portion 423, and a fourth shielding portion 424 corresponding to the second side area 222, the third side area 223, and the fourth side area 224, respectively, and the second shielding portion 422, the third shielding portion 423, and the fourth shielding portion 424 respectively cover the mounting gaps between the inner wall of the housing 10 and the second side area 222, the third side area 223, and the fourth side area 224. The first side area 221 and the mounting gap between it and the inner wall of the housing 10 are covered by the adjustable mirror base 30. The mounting gaps between the second side area 222, the third side area 223, and the fourth side area 224 and the inner wall of the housing 10 are respectively covered by the second shielding part 422, the third shielding part 423, and the fourth shielding part 424, so that each shielding part (i.e., the second shielding part 422, the third shielding part 423, and the fourth shielding part 424) can accurately cover the corresponding side area (i.e., the second side area 222, the third side area 223, and the fourth side area 224) and the mounting gap between it and the inner wall of the housing 10. At the same time, each shielding part and the adjustable mirror base 30 form a circumferential enclosure to achieve full circumferential blocking of light leakage from the dichroic mirror 20.

[0037] In some examples, the parameter Figures 1 to 4 As shown, the dichroic mirror extinction assembly 100 also includes a fixing part 41. The fixing part 41 is detachably disposed on the side wall 102 of the housing 10 on the side of the adjustable mirror base 30, or the fixing part 41 is integrally formed with the side wall 102 of the housing 10 on the side of the adjustable mirror base 30. The fixing part 41 extends toward the peripheral area 22 to form a shielding structure 42. By setting the fixing part 41 on the side wall 102 of the housing 10 on the side of the adjustable mirror base 30, the adjustment space for the dichroic mirror 20 to rotate driven by the adjustable mirror base 30 can be avoided, and the shielding structure 42 formed by the fixing part 41 extending toward the peripheral area 22 can accurately cover the installation gap between the corresponding side area and the inner wall of the housing 10, so as to form a full circumferential light shield together with the adjustable mirror base 30. In some examples, the fixing part 41 and the blocking structure 42 are detachable and replaceable according to actual needs (e.g., when adapting to dichroic mirrors 20 of different sizes), allowing adjustment of the blocking part position to calibrate the blocking accuracy and avoid light-blocking misalignment caused by manufacturing errors. In some examples, the integral molding method can eliminate the assembly gap between the fixing part 41 and the housing 10, reducing the risk of light leakage through the gap.

[0038] In some examples, the parameter Figure 1As shown, the edge of the adjustable lens mount 30 extends towards the side wall 101 of the housing 10 to cover the mounting gap between the first side area 221 and the inner wall of the housing 10, and together with the shielding structure 42, covers the circumferential mounting gap between the dichroic mirror 20 and the side wall of the housing 10. The edge of the adjustable lens mount 30 extends towards the side wall 101 of the housing 10, directly covering the mounting gap between the first side area 221 and the inner wall of the housing 10, and fixing the first side area 221 with the adjustable lens mount 30 to ensure accurate coverage. By covering the mounting gap between the first side area 221 and the inner wall of the housing 10 with the adjustable lens mount 30, and the shielding structure 42 covering the mounting gap between the peripheral area 22 and the inner wall of the housing 10, the adjustable lens mount 30 and the shielding structure 42 can jointly enclose and cover the entire circumferential mounting gap between the dichroic mirror 20 and the side wall of the housing 10, completely blocking light leakage. Furthermore, the full circumferential coverage can further reduce background stray light and improve image contrast. Meanwhile, the adjustable lens mount 30 has the function of driving the dichroic mirror 20 to rotate. The edge extension of the adjustable lens mount 30 moves synchronously with the adjustable lens mount 30 without hindering the adjustment. Furthermore, the installation gap position covered by the edge extension of the adjustable lens mount 30 can always be aligned with the rotation of the dichroic mirror 20, and can stably block light before and after adjustment, so as to take into account the circumferential light-blocking effect while avoiding affecting the tilt angle adjustment of the dichroic mirror 20.

[0039] In some examples, the parameter Figure 1 and Figure 2 As shown, the adjustable lens mount 30 includes: a movable part 31 that rotates about a preset axis 34 relative to the side wall 101 of the housing 10; the movable part 31 is configured to fit tightly against the edge of the first side region 221; and a fixing structure 32 disposed on the movable part 31 and used to press the first side region 221 against the positioning surface 311. The movable part 31 rotates about the preset axis 34 relative to the side wall 101 of the housing 10, causing the dichroic mirror 20 to perform a circular motion. This ensures that only the tilt angle of the dichroic mirror 20 changes during adjustment, without deviating from the optical center, thus avoiding optical path coupling failure due to rotational misalignment. The movable part 31 fits tightly against the edge of the first side region 221 through the positioning surface 311, assisting in the installation and positioning of the dichroic mirror 20 during its fixation, preventing misalignment during installation. The first side area 221 is firmly pressed onto the positioning surface 311 by the fixing structure 32, which blocks light leakage from the edge of the first side area 221, improves the light blocking effect, and prevents the dichroic mirror 20 from loosening during adjustment or long-term use, which would cause the tilt angle to shift.

[0040] In some examples, the parameter Figure 1 and Figure 3As shown, the fixing structure 32 includes: a limiting block 321 formed on the movable part 31 and protruding on one side of the positioning surface 311 in a direction perpendicular to the positioning surface 311; a movable block 322 movably disposed on the movable part 31 relative to the limiting block 321; and a rotating rod 323 passing through the movable block 322 and extending into the limiting block 321; the movable block 322 is configured to move on the positioning surface 311 by rotating the rotating rod 323, so as to cooperate with the limiting block 321 to clamp and fix the first side area 221. The limiting block 321 protrudes in a direction perpendicular to the positioning surface 311, and can pre-hold one edge of the first side area 221 to prevent the dichroic mirror 20 from shifting due to lack of positioning during clamping, ensuring that the first side area 221 always fits against the positioning surface 311 and avoiding affecting the overall optical path alignment of the dichroic mirror 20. The movable block 322 is movably set relative to the limiting block 321. With the threaded drive of the rotating rod 323, the movement distance of the movable block 322 on the positioning surface 311 can be precisely controlled by rotating the rotating rod 323 to adjust the clamping gap according to the thickness of the first side area 221, adapting to dichroic mirrors 20 of different specifications. It also maintains a stable clamping force through thread self-locking, preventing the movable block 322 from loosening and the dichroic mirror 20 from shifting due to vibration during long-term use. At the same time, the fixed structure 32 is set on the movable part 31 and can rotate synchronously with the movable part 31 around the preset axis 34 to prevent obstruction of the angle adjustment of the dichroic mirror 20.

[0041] In some examples, the parameter Figures 1 to 4 As shown, the movable block 322 is formed on the side of the first side area 221 facing the direction of the incident illumination light and at least covers part of the first side area 221. There is a gap between the movable block 322 and the second shielding part 422 along the direction of the plane where the dichroic mirror 20 is located. The limiting block 321 is formed on the side of the first side area 221 opposite to the direction of the incident illumination light and at least covers part of the first side area 221. There is a gap between the limiting block 321 and the fourth shielding part 424 along the direction of the plane where the dichroic mirror 20 is located.

[0042] By having the movable block 322 and the limiting block 321 cover at least a portion of the first side area 221, sufficient clamping area can be formed between the movable block 322 and the limiting block 321 to reliably fix the dichroic mirror 20 and prevent it from loosening due to vibration. Simultaneously, by positioning the movable block 322 on the side of the first side area 221 facing the direction of illumination light incidence and only covering a portion of the first side area 221, the non-optical area of ​​the first side area 221 is clamped, avoiding contact with the optical functional area 21. This ensures that the illumination light can enter the optical functional area 21 without obstruction, avoiding impact on the intensity and uniformity of the excitation light. Furthermore, the gap between the movable block 322 and the second shielding part 422 in the plane of the dichroic mirror 20 provides space for the movable block 322 to rotate with the movable part 31, preventing mechanical interference due to overlapping positions and ensuring smooth adjustment. The limiting block 321 is located on the side of the first side area 221 opposite to the direction of incident illumination light, and also only covers a portion of the first side area 221. Together with the movable block 322, it clamps the non-optical area of ​​the first side area 221, ensuring the stability of the first side area 221 and preventing contact with the optical functional area 21. This prevents the blocking of the emitted light transmitted from the optical functional area 21 and ensures that the emitted light smoothly enters the imaging optical path. Furthermore, the gap between the limiting block 321 and the fourth shielding part 424 in the plane direction of the dichroic mirror 20 provides space for the limiting block 321 to rotate with the movable part 31, preventing collision with the fourth shielding part 424 and ensuring that there is no jamming of the components during adjustment.

[0043] In some examples, to ensure stable rotation of the movable part 31 relative to the side wall 101 of the housing 10, a preset shaft 34 extending along its thickness direction is disposed on the side wall 101 of the housing 10. This preset shaft 34 rotatably engages with a preset shaft hole (not shown) on the movable part 31 to provide a fixed rotation center for the rotation of the movable part 31. The axis of the preset shaft 34 is set along the center point of the movable part 31, so that the movable part 31 rotates around its own geometric center. The rotation center of the movable part 31 coincides with the optical center of the dichroic mirror 20, which can prevent the optical center of the dichroic mirror 20 from deviating from the principal optical axis S of the microscope during rotation.

[0044] In some examples, the dichroic mirror extinction assembly 100 also includes a drive device for driving the movable part 31 to rotate around a preset axis 34, providing power for the rotation of the movable part 31 around the preset axis 34. This drive device can precisely rotate the movable part 31 manually (e.g., with a graduated adjustment knob) or automatically (e.g., with a micro stepper motor) to assist the dichroic mirror 20 in correcting tilt angle deviations. It should be noted that the specific structure of the drive device is not a key feature of this invention; it only needs to fulfill the basic function of driving the movable part 31 to rotate stably, and will not be described in detail here.

[0045] Combination Figures 1 to 4 As shown, based on the technical solutions included in the above-described specific embodiments, this application also discloses a microscope, which includes: a dichroic mirror extinction component 100 as described in any of the foregoing embodiments. The microscope in this embodiment includes the dichroic mirror extinction component 100. The specific technical solution of the dichroic mirror extinction component included in the microscope disclosed in this embodiment is described in the foregoing embodiments and will not be repeated here.

[0046] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dichroic mirror extinction component, characterized in that, include: A housing with an internal cavity, an adjustable mirror mount disposed in the housing and capable of rotating the dichroic mirror around a preset axis to fix the dichroic mirror at a set angle within the cavity, and a shielding structure disposed between the dichroic mirror and the side wall of the housing. The dichroic mirror includes: an optical functional area, a first side area formed on one side of the optical functional area and fixed by the adjustable mirror base, and a peripheral area that surrounds the optical functional area together with the first side area. The adjustable mirror mount covers the mounting gap between the first side area and the inner wall of the housing, and the shielding structure is used to cover the mounting gap between the peripheral area and the inner wall of the housing. There is a set distance between the shielding structure and the peripheral area along a direction perpendicular to the plane where the dichroic mirror is located. The set distance is greater than the maximum displacement of the peripheral area when the dichroic mirror rotates around the preset axis.

2. The dichroic mirror extinction assembly according to claim 1, characterized in that, The shielding structure is located on the side of the peripheral area opposite to the direction of incident illumination light.

3. The dichroic mirror extinction assembly according to claim 2, characterized in that, The shielding structure extends circumferentially from the peripheral area toward the inner wall of the housing, and at least covers the mounting gap between the peripheral area and the inner wall of the housing.

4. The dichroic mirror extinction assembly according to claim 3, characterized in that, The peripheral area includes a second side area, a third side area, and a fourth side area distributed circumferentially around the optical functional area; The shielding structure includes a second shielding part, a third shielding part, and a fourth shielding part corresponding to the second side area, the third side area, and the fourth side area, respectively, and the second shielding part, the third shielding part, and the fourth shielding part respectively cover the installation gap between the inner wall of the housing and the second side area, the third side area, and the fourth side area.

5. The dichroic mirror extinction assembly according to claim 1, characterized in that, The dichroic mirror extinction assembly further includes a fixing part, which is detachably disposed on the side wall of the housing relative to the adjustable mirror base, or the fixing part is integrally formed with the side wall of the housing relative to the adjustable mirror base, and the fixing part extends toward the peripheral area to form the blocking structure.

6. The dichroic mirror extinction assembly according to claim 4, characterized in that, The edge of the adjustable mirror mount extends toward the side wall of the housing to cover the mounting gap between the first side area and the inner wall of the housing, and together with the shielding structure, covers the circumferential mounting gap between the dichroic mirror and the side wall of the housing.

7. The dichroic mirror extinction assembly according to claim 6, characterized in that, The adjustable mirror mount includes: a movable part that rotates about the preset axis relative to the side wall of the housing, the movable part being configured to fit closely to the edge of the first side area, and a fixing structure disposed on the movable part for pressing the first side area against the positioning surface.

8. The dichroic mirror extinction assembly according to claim 7, characterized in that, The fixing structure includes: a limiting block formed on the movable part and protruding from one side of the positioning surface in a direction perpendicular to the positioning surface; a movable block movably disposed on the movable part relative to the limiting block; and a rotating rod passing through the movable block and extending into the limiting block. The movable block is configured to move on the positioning surface by rotating the rotary rod, so as to cooperate with the limiting block to clamp and fix the first side area.

9. The dichroic mirror extinction assembly according to claim 8, characterized in that, The movable block is formed on the side of the first side area facing the incident direction of the illumination light and at least covers part of the first side area. There is a gap between the movable block and the second shielding part along the direction of the plane where the dichroic mirror is located. The limiting block is formed on the side of the first side area opposite to the direction of incident illumination light, and at least covers part of the first side area. There is a gap between the limiting block and the fourth shielding part along the direction of the plane where the dichroic mirror is located.

10. A microscope, characterized in that, include: The dichroic mirror extinction assembly as described in any one of claims 1 to 9 above.

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