Diaphragm adjusting device and optical system

Abstract

The invention relates to the technical field of optical equipment, in particular to a diaphragm adjusting device and an optical system.The diaphragm adjusting device is characterized in that a first transmission unit is in transmission fit with a blade unit, a blade mounting disc is fixedly connected with a mounting base, and the blade unit is mounted on the blade mounting disc; the first transmission unit comprises a lifting disc and a first rotating ring arranged outside the lifting disc in a sleeving mode, and the first rotating ring is matched with the lifting disc so that the first rotating ring can be controlled to rotate relative to the mounting base to drive the lifting disc to move in the first direction. And the blade units are driven to move in the first direction relative to the blade mounting disc, the diameter of an unthreaded hole formed by the blade units is adjusted, and the first direction is the axial direction of the first rotating ring. The objective of the invention is to provide a diaphragm adjusting device and an optical system for at least one technical problem related in the background technology.

Description

Technical Field

[0001] This application relates to the field of optical equipment technology, and more specifically, to an aperture adjustment device and an optical system. Background Technology

[0002] As a key light-adjusting component in an optical system, the variable aperture can adjust the aperture of the beam entering the objective lens. Its adjustment range and precision directly affect the illumination range and image quality. During exposure, not only is it required that the aperture size of the aperture mechanism be adjustable, but also that the position of the aperture along the optical axis be adjustable. However, existing optical systems struggle to simultaneously adjust both the aperture size and the position of the entire aperture along the optical axis. Summary of the Invention

[0003] The purpose of this application is to provide an aperture adjustment device and optical system to address at least one of the technical problems involved in the background art.

[0004] To achieve the above objectives, this application adopts the following technical solution: One aspect of this application provides an aperture adjustment device comprising a mounting base, a first transmission unit, a blade mounting plate, and a blade unit, all coaxially arranged and sequentially arranged in a first direction. The first transmission unit is rotatably mounted on the mounting base and is in transmission cooperation with the blade unit. The blade mounting plate is fixedly connected to the mounting base, and the blade unit is mounted on the blade mounting plate. The first transmission unit includes a lifting plate and a first rotating ring fitted outside the lifting plate. The first rotating ring cooperates with the lifting plate to enable the lifting plate to move in the first direction by controlling the rotation of the first rotating ring relative to the mounting base, thereby causing the blade unit to move in the first direction relative to the blade mounting plate, and adjusting the aperture diameter formed by the blade unit. The first direction is the axial direction of the first rotating ring.

[0005] Optionally, the first transmission unit further includes a first slide rod assembly located between the first rotating ring and the lifting plate. The first rotating ring and the lifting plate are connected through the first slide rod assembly, so as to drive the lifting plate to reciprocate in the first direction by controlling the rotation of the first rotating ring relative to the mounting base.

[0006] The beneficial effect of this technical solution is that: setting the first slide rod assembly facilitates the transmission of power between the first rotating ring and the lifting plate, thereby driving the blade unit to move relative to the blade mounting plate in the first direction and adjusting the diameter of the light hole formed by the blade unit.

[0007] Optionally, a limiting groove is provided on the outer wall of the lifting plate. The limiting groove extends in a wave-like shape in the circumferential direction of the first rotating ring. The first slide rod assembly includes a first slide rod, one end of which is fixed to the first rotating ring, and the other end of which slides in cooperation with the limiting groove.

[0008] The beneficial effect of this technical solution is that, as the first rotating ring rotates relative to the lifting plate, the first slide rod interacts with the inner wall of the limiting slide groove, thereby driving the lifting plate to move back and forth in the first direction by pushing the inner wall of the limiting slide groove through the first slide rod, so that the lifting plate can move back and forth in the first direction simply by continuously rotating the first rotating ring in one direction.

[0009] Optionally, the first slide rod assembly further includes a first limiting bearing fitted onto the first slide rod, the inner ring of the first limiting bearing being fixed to the first slide rod, and the outer ring of the first limiting bearing engaging with the limiting groove.

[0010] The beneficial effect of this technical solution is that, by replacing the sliding friction between the first slide rod and the inner wall of the limiting slide groove with the rolling friction between the first limiting bearing and the inner wall of the limiting slide groove, the wear of the inner wall of the limiting slide groove and the first slide rod can be reduced during the use of the aperture adjustment device, thereby extending the service life of the aperture adjustment device.

[0011] Optionally, the aperture adjustment device provided in this application further includes a plurality of connecting rods arranged parallel to the first direction. One end of each connecting rod is fixed to the mounting base, and the other end of each connecting rod is fixed to the blade mounting plate. A plurality of mating holes are provided on the lifting plate, and each mating hole is fitted onto each connecting rod in a corresponding manner. The mating holes and the connecting rods slide in the first direction.

[0012] The beneficial effects of this technical solution are as follows: In this way, the connecting rod not only serves to connect the mounting base and the blade mounting plate, but also serves to limit and guide the upgrading plate. When the first rotating ring rotates relative to the mounting base, a force is generated between the first rotating ring and the lifting plate. Since the mating hole on the lifting plate is fitted and slidably engaged with the connecting rod, the lifting plate is difficult to rotate together under the action of the first rotating ring. At the same time, under the action of the first rotating ring, the lifting plate can also move in the first direction under the guidance of each connecting rod, thereby achieving the purpose of moving the lifting plate in the first direction by controlling the rotation of the first rotating ring.

[0013] Optionally, the blade unit includes a second rotating ring, a connecting bearing, a blade assembly, and a second slide rod assembly. The blade assembly is connected to the second rotating ring, the second rotating ring is connected to the lifting plate via the connecting bearing, and the second rotating ring is connected to the first rotating ring via the second slide rod assembly. This allows the first rotating ring to rotate relative to the lifting plate and move in the first direction by controlling the rotation of the first rotating ring.

[0014] The beneficial effect of this technical solution is that, by setting a connecting bearing, the second rotating ring can both rotate relative to the lifting plate and move in the first direction under the drive of the lifting plate.

[0015] Optionally, the second slide rod assembly includes a second slide rod and a second limiting bearing fitted onto the second slide rod. The first transmission unit includes a groove guide fixed to the first rotating ring. The inner ring of the second limiting bearing is fixedly connected to the second slide rod, and the outer ring of the second limiting bearing cooperates with the groove guide in the first direction.

[0016] The beneficial effects of this technical solution are as follows: In this way, through the cooperation between the second slide rod assembly and the slide guide, it is possible to drive the second slide ring to rotate by controlling the rotation of the first rotating ring, thereby driving the blade assembly to rotate. Moreover, it is also possible to guide the movement of the second rotating ring relative to the first rotating ring in the first direction.

[0017] Optionally, the blade assembly includes an elastic element, a blade dial, and a blade. In the first direction, the blade mounting plate, the elastic element, the blade, and the blade dial are arranged sequentially and in sequential pressure contact. The blade dial and the blade mounting plate are both pivotally connected to the blade, and the blade dial is fixedly connected to the second rotating ring.

[0018] The beneficial effect of this technical solution is that, when the blade dial moves along the first direction, the blade always fits against the blade dial under the pressure of the elastic element, so that the blade can move together with the blade dial.

[0019] Optionally, the aperture adjustment device provided in this application further includes a motor and an end face gear. The end face gear is coaxially arranged with the first rotating ring and fixed to the first rotating ring. The motor is fixed to the mounting base and the motor is in transmission cooperation with the end face gear.

[0020] The beneficial effect of this technical solution is that, by controlling the motor to drive the end face gear to rotate, and thus driving the first rotating ring to rotate, the position of the blade unit in the first direction and the diameter of the aperture formed by the blade unit can be adjusted simultaneously.

[0021] Another aspect of this application provides an optical system including the aperture adjustment device provided in this application.

[0022] The technical solution provided in this application can achieve at least one of the following beneficial effects: The aperture adjustment device and optical system provided in this application employ a first transmission unit including a lifting plate and a first rotating ring. By controlling the rotation of the first rotating ring relative to the mounting base, the linkage between the first transmission unit and the blade unit is realized, thereby achieving the purpose of simultaneously adjusting the position of the blade unit in the first direction (i.e., the optical axis direction) and adjusting the diameter of the aperture formed by the blade unit.

[0023] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of one embodiment of the aperture adjustment device provided in this application; Figure 2 A partially exploded structural diagram of one embodiment of the aperture adjustment device provided in this application; Figure 3 A partial cross-sectional structural schematic diagram of one embodiment of the aperture adjustment device provided in this application; Figure 4 A three-dimensional structural schematic diagram of one embodiment of the lifting plate provided in this application; Figure 5 A partial three-dimensional structural schematic diagram of one embodiment of the first transmission unit provided in this application; Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point B; Figure 7 A three-dimensional structural schematic diagram of one embodiment of the blade unit provided in this application; Figure 8 A partial three-dimensional structural schematic diagram of one embodiment of the blade unit provided in this application; Figure 9A three-dimensional structural schematic diagram of one embodiment of the blade dial provided in this application; Figure 10 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure label: 01. Motor; 02. Transmission gears; 03. Mounting base; 04. End face gear; 05. First transmission unit; 06. Blade unit; 07. First slide bar assembly; 08. Lifting plate; 09. Bearing; 10. Connecting bearing; 11. Second rotating ring; 12. Blade mounting plate; 13. Blade; 14. Blade dial; 15. Base section; 16. First rotating ring 17. First annular portion; 18. Connecting rod; 19. Second annular part; 20. Main body; 21. Limiting slide groove; 23. Second slide bar; 24. First limit bearing; 25. First slide bar; 26. Second slide bar assembly; 27. First locating pin; 29. ​​Second locating pin; 30. Blade groove; 31. Groove guide; 32. Second limit bearing. Detailed Implementation

[0027] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] like Figures 1 to 10 As shown, one aspect of this application provides an aperture adjustment device including a mounting base 03, a first transmission unit 05, a blade mounting plate 12, and a blade unit 06, all coaxially arranged and sequentially arranged in a first direction. The first transmission unit 05 is rotatably mounted on the mounting base 03 and is in transmission cooperation with the blade unit 06. The blade mounting plate 12 is fixedly connected to the mounting base 03, and the blade unit 06 is mounted on the blade mounting plate 12. The first transmission unit 05 includes a lifting plate 08 and a first rotating ring 16 fitted outside the lifting plate 08. The first rotating ring 16 cooperates with the lifting plate 08 so that by controlling the rotation of the first rotating ring 16 relative to the mounting base 03, the lifting plate 08 can be moved in the first direction, thereby moving the blade unit 06 relative to the blade mounting plate 12 in the first direction and adjusting the aperture diameter formed by the blade unit 06. The first direction is the axial direction of the first rotating ring 16.

[0031] In this embodiment, the mounting base 03 preferably includes a base portion 15 and a first annular portion 17 fixed to the base portion 15. The first rotating ring 16 is fitted onto the first annular portion 17 on the mounting base 03 via a bearing 09. The first annular portion 17 and the first rotating ring 16 are coaxially arranged. The inner ring of the bearing 09 is fixed to the first annular portion 17, and the outer ring is fixed to the first rotating ring 16.

[0032] The aperture adjustment device provided in this application uses a first transmission unit 05 including a lifting plate 08 and a first rotating ring 16. By controlling the rotation of the first rotating ring 16 relative to the mounting base 03, the linkage between the first transmission unit 05 and the blade unit 06 is realized, thereby achieving the purpose of simultaneously adjusting the position of the blade unit 06 in the first direction (i.e., the optical axis direction) and adjusting the diameter of the aperture formed by the blade unit 06.

[0033] like Figures 4 to 6As shown, optionally, the first transmission unit 05 further includes a first slide rod assembly 07 located between the first rotating ring 16 and the lifting plate 08. The first rotating ring 16 and the lifting plate 08 are connected via the first slide rod assembly 07, so that by controlling the rotation of the first rotating ring 16 relative to the mounting base 03, the lifting plate 08 can be driven to reciprocate in the first direction. The first slide rod assembly 07 is provided to facilitate the transmission of power between the first rotating ring 16 and the lifting plate 08, thereby driving the blade unit 06 to move relative to the blade mounting plate 12 in the first direction and adjusting the diameter of the aperture formed by the blade unit 06.

[0034] Optionally, a limiting groove 21 is provided on the outer wall of the lifting plate 08. The limiting groove 21 extends in a wave-like shape in the circumferential direction of the first rotating ring 16. The first slide rod assembly 07 includes a first slide rod 25, one end of which is fixed to the first rotating ring 16, and the other end of which slides in cooperation with the limiting groove 21. In this way, as the first rotating ring 16 rotates relative to the lifting plate 08, the first slide rod 25 interacts with the inner wall of the limiting groove 21, thereby pushing the inner wall of the limiting groove 21 through the first slide rod 25 to drive the lifting plate 08 to reciprocate in the first direction. This achieves the purpose of making the lifting plate 08 reciprocate in the first direction simply by continuously rotating the first rotating ring 16 in one direction. In this embodiment of the application, a limiting groove 21 that is recessed into the lifting plate 08 can be machined on the outer wall of the lifting plate 08, and a groove with the limiting groove 21 can be installed on the outer wall of the lifting plate 08. Preferably, the limiting groove 21 is machined on the outer wall of the lifting plate 08; the limiting groove 21 is preferably extended into a closed shape in the circumferential direction of the first rotating ring 16.

[0035] Optionally, the first slide rod assembly 07 further includes a first limiting bearing 24 fitted onto the first slide rod 25. The inner ring of the first limiting bearing 24 is fixed to the first slide rod 25, and the outer ring of the first limiting bearing 24 engages with the limiting groove 21. In this way, the rolling friction between the first limiting bearing 24 and the inner wall of the limiting groove 21 replaces the sliding friction between the first slide rod 25 and the inner wall of the limiting groove 21, reducing the wear on the inner wall of the limiting groove 21 and the first slide rod 25 during use of the aperture adjustment device, thus extending the service life of the aperture adjustment device. In this embodiment, preferably, the length direction of the first slide rod 25 and the opening direction of the limiting groove 21 are radial to the first rotating ring 16. In another embodiment of this application, the limiting groove 21 is disposed on the inner wall of the first rotating ring 16, one end of the first slide rod 25 is fixed to the lifting plate 08, and the other end is slidably engaged with the limiting groove 21. When the first slide rod assembly 07 also includes the first limiting bearing 24, the first limiting bearing 24 is located in the limiting groove 21 disposed on the inner wall of the first rotating ring 16.

[0036] In this embodiment of the application, preferably, the first transmission unit 05 further includes a plurality of first slide rod assemblies 07, each of the first slide rod assemblies 07 being evenly distributed circumferentially on the first rotating ring 16, so that the first rotating ring 16 drives the lifting plate 08 to move more stably. The first transmission unit 05 may include 2 to 5 first slide rod assemblies 07, for example, the first transmission unit 05 includes 3 or 4 first slide rod assemblies 07.

[0037] like Figure 3 As shown, optionally, the aperture adjustment device provided in this application embodiment further includes a plurality of connecting rods 18 arranged parallel to the first direction. One end of the connecting rod 18 is fixed to the mounting base 03, and the other end of the connecting rod 18 is fixed to the blade mounting plate 12. A plurality of mating holes are provided on the lifting plate 08, and each of the mating holes is fitted onto each of the connecting rods 18 in a corresponding manner. The mating holes and the connecting rods 18 slide in the first direction. Thus, the connecting rod 18 not only connects the mounting base 03 and the blade mounting plate 12, but also limits and guides the upgrading plate. When the first rotating ring 16 rotates relative to the mounting base 03, a force is generated between the first rotating ring 16 and the lifting plate 08. Because the mating hole on the lifting plate 08 is fitted and slidably engaged with the connecting rod 18, the lifting plate 08 is difficult to rotate together under the action of the first rotating ring 16. At the same time, under the action of the first rotating ring 16, the lifting plate 08 can also move in the first direction under the guidance of each connecting rod 18, thereby achieving the purpose of moving the lifting plate 08 in the first direction by controlling the rotation of the first rotating ring 16. In this embodiment, the number of connecting rods 18 can be 2 to 16, for example, the number of connecting rods 18 can be 4, 6, 8, 10 or 12, etc. The preferred number of connecting rods 18 is 8, and each connecting rod 18 is evenly distributed in the axial direction of the first rotating ring 16.

[0038] like Figures 7 to 10 As shown, optionally, the blade unit 06 includes a second rotating ring 11, a connecting bearing 10, a blade assembly, and a second slide rod assembly 26. The blade assembly is connected to the second rotating ring 11, the second rotating ring 11 is connected to the lifting plate 08 via the connecting bearing 10, and the second rotating ring 11 is connected to the first rotating ring 16 via the second slide rod assembly 26. This allows the first rotating ring 16 to rotate, causing the second rotating ring 11 to rotate relative to the lifting plate 08 and move in the first direction. Thus, by providing the connecting bearing 10, the second rotating ring 11 can both rotate relative to the lifting plate 08 and move in the first direction under the influence of the lifting plate 08. Figure 3As shown in the embodiment of this application, the lifting plate 08 preferably includes a main body 20 and a second annular part 19 fixed to the inner side of the main body 20. The main body 20 and the second annular part 19 are both coaxially arranged with the first rotating ring 16. When the above-mentioned limiting slide groove 21 is provided on the lifting plate 08, the limiting slide groove 21 is provided on the outer wall of the main body 20. The second rotating ring 11 is fitted outside the connecting bearing 10 and the second annular part 19, fixing the inner ring of the connecting bearing 10 to the second annular part 19 and fixing the outer ring of the connecting bearing 10 to the second rotating ring 11.

[0039] Optionally, the second slide rod assembly 26 includes a second slide rod 23 and a second limiting bearing 32 fitted onto the second slide rod 23. The first transmission unit 05 includes a groove guide 31 fixed to the first rotating ring 16. The inner ring of the second limiting bearing 32 is fixedly connected to the second slide rod 23, and the outer ring of the second limiting bearing 32 cooperates with the groove guide 31 in the first direction. Thus, through the cooperation between the second slide rod assembly 26 and the groove guide 31, it is possible to control the rotation of the first rotating ring 16 to drive the rotation of the second rotating ring 11, thereby driving the blade assembly to rotate. Furthermore, it is also possible to guide the movement of the second rotating ring 11 relative to the first rotating ring 16 in the first direction. In this embodiment, preferably, the second slide rod assembly 26 is fixed to the outer wall of the second rotating ring 11, the axial direction of the second slide rod 23 is the radial direction of the second rotating ring 11, the slide groove guide 31 is fixed to the outer wall of the first rotating ring 16, and the slide groove guide 31 is preferably a U-shaped part with its opening facing parallel to the first direction. Both ends of the opening of the U-shaped part are fixed to the first rotating ring 16, and the second limiting bearing 32 can move within the U-shaped part along the first direction. Preferably, the blade unit 06 includes multiple second slide rod assemblies 26, and the first transmission unit 05 includes multiple slide groove guides 31, with each second slide rod assembly 26 corresponding to and cooperating with each slide groove guide 31. The number of second slide rod assemblies 26 can be 2 to 5, for example, 3 or 4.

[0040] Optionally, the blade assembly includes an elastic element, a blade dial 14, and blades 13. In the first direction, the blade mounting plate 12, the elastic element, the blades 13, and the blade dial 14 are sequentially arranged and in sequential pressure contact. Both the blade dial 14 and the blade mounting plate 12 are pivotally connected to the blades 13. The blade dial 14 is fixedly connected to the second rotating ring 11. Thus, when the blade dial 14 moves along the first direction, the blades 13 remain in contact with the blade dial 14 under the pressure of the elastic element, allowing the blades 13 to move together with the blade dial 14. Preferably, the second rotating ring 11 is a stepped sleeve-shaped component. In the first direction, the smaller diameter section of the second rotating ring 11 is connected to the second annular portion 19 via a connecting bearing 10, and the larger diameter section of the second rotating ring 11 is connected to the blade dial 14. The blade mounting plate 12 is located inside the larger diameter section of the second rotating ring 11. In this embodiment, the elastic element can be a compression spring or a V-shaped spring, etc. In this way, by controlling the rotation of the second rotating ring 11 relative to the blade mounting plate 12, the blade dial 14 can be rotated relative to the blade mounting plate 12, thereby driving the opening and closing of the blade 13. By controlling the movement of the second rotating ring 11 in the first direction, the blade dial 14 can be moved in the first direction. Since the blade 13 is always in pressure contact with the blade dial 14 under the action of the elastic element, the blade 13 can move with the blade dial 14 in the first direction, thereby achieving the purpose of adjusting the position of the blade 13 in the first direction.Specifically, the blade assembly also includes a first positioning pin 27 and a second positioning pin 29. Along the length of the blade 13, the first positioning pin 27 is installed at the tail end of the blade 13, and the second positioning pin 29 is installed at the middle of the blade 13. The blade 13 is mounted to the blade mounting plate 12 via the first positioning pin 27, allowing the blade 13 to pivot relative to the blade mounting plate 12 about the first positioning pin 27. A blade groove 30 is provided on the blade dial 14, recessed in the first direction. This blade groove 30 extends in a wavy shape along the circumference of the blade dial 14. The second positioning pin 29 slides in engagement with the blade groove 30. When the second rotating ring 11 rotates relative to the blade mounting plate 12, the blade dial 14 rotates relative to the blade mounting plate 12. Because the second positioning pin 29, installed at the middle of the blade 13, slides in engagement with the wavy blade groove 30 on the blade dial 14, the rotation of the blade dial 14 relative to the blade mounting plate 12 drives the blade 13 to pivot about the first positioning pin 27. The shaft oscillates periodically. The blade assembly includes multiple blades 13, multiple first positioning pins 27, and multiple second positioning pins 29. Each blade 13 is equipped with a first positioning pin 27 and a second positioning pin 29. The blades 13 are evenly distributed around the blade mounting plate 12. The blade dial 14 rotates under the drive of the second rotating ring 11, causing each blade 13 to oscillate synchronously and periodically, thereby adjusting the diameter of the aperture. In order for the blades 13 to move relative to the blade mounting plate 12 in the first direction, the first positioning pins 27 can be fixed to the blade mounting plate 12, and the mounting holes on the blades 13 can be fitted with the first positioning pins 27 and slide in the first direction. Alternatively, the first positioning pins 27 can be fixed to the blades 13, and the first positioning pins 27 can be inserted into the mounting holes on the blade mounting plate 12 and slide in the first direction. When the elastic element is a compression spring, the elastic element can be fitted with the first positioning pin 27 or set separately from the first positioning pin 27. The blade assembly preferably includes multiple blade limiting bearings, each blade limiting bearing being fitted and fixed to the second locating pin 29 in a corresponding manner, and each blade limiting bearing cooperating with the blade slide groove 30. Preferably, the blade slide groove 30 extends in a closed shape in the circumferential direction of the blade dial 14.

[0041] Optionally, the aperture adjustment device provided in this application embodiment further includes a motor 01 and an end face gear 04. The end face gear 04 is coaxially arranged with the first rotating ring 16 and fixed to the first rotating ring 16. The motor 01 is fixed to the mounting base 03, and the motor 01 and the end face gear 04 are in a transmission engagement. Thus, by controlling the motor 01 to drive the end face gear 04 to rotate, thereby driving the first rotating ring 16 to rotate, the purpose of simultaneously adjusting the position of the blade unit 06 in the first direction and adjusting the diameter of the aperture formed by the blade unit 06 can be achieved. In this application embodiment, the motor 01 can engage with the end face gear 04 through a transmission gear 02 or a gear set. Preferably, the motor 01 is a high-precision motor, which, in conjunction with the blade slide groove 30, effectively improves the accuracy of adjusting the aperture diameter. In some embodiments, it can achieve micron-level precision adjustment of the aperture diameter.

[0042] Another aspect of this application provides an optical system including the aperture adjustment device provided in the embodiments of this application.

[0043] The optical system provided in this application is implemented using the aperture adjustment device provided in this application. By employing a first transmission unit 05 including a lifting plate 08 and a first rotating ring 16, the first transmission unit 05 and the blade unit 06 are linked by controlling the rotation of the first rotating ring 16 relative to the mounting base 03, thereby achieving the purpose of simultaneously adjusting the position of the blade unit 06 in the first direction (i.e., the optical axis direction) and adjusting the diameter of the light aperture formed by the blade unit 06.

[0044] The aperture adjustment device and optical system provided in this application offer a large-aperture, wide-range adjustable aperture structure to overcome the shortcomings of existing aperture structures, which have a small adjustment range and cannot achieve a large dynamic range adjustment. A high-precision motor drives a multi-tooth end face gear 04 to meet various precision control requirements. The design of the blade groove 30 on the blade dial 14 achieves micron-level precision adjustment of the aperture. It can adapt to changes in the optical axis direction of NA under different numerical apertures. The blade groove 30 on the blade dial 14 has several periodic bending sections, which define the linear relationship between the aperture diameter and the motor 01 angle. The bending sections simultaneously control the height and rotation amount.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An aperture adjustment device, characterized in that, The device includes a mounting base, a first transmission unit, a blade mounting plate, and blade units, all coaxially arranged and sequentially arranged in a first direction. The first transmission unit is rotatably mounted on the mounting base and is in transmission cooperation with the blade units. The blade mounting plate is fixedly connected to the mounting base, and the blade units are mounted on the blade mounting plate. The first transmission unit includes a lifting plate and a first rotating ring fitted outside the lifting plate. The first rotating ring cooperates with the lifting plate to drive the lifting plate to move in the first direction by controlling the rotation of the first rotating ring relative to the mounting base, thereby driving the blade units to move relative to the blade mounting plate in the first direction and adjusting the diameter of the aperture formed by the blade units. The first direction is the axial direction of the first rotating ring.

2. The aperture adjustment device according to claim 1, characterized in that, The first transmission unit further includes a first slide rod assembly located between the first rotating ring and the lifting plate. The first rotating ring and the lifting plate are connected through the first slide rod assembly so as to drive the lifting plate to reciprocate in the first direction by controlling the rotation of the first rotating ring relative to the mounting base.

3. The aperture adjustment device according to claim 2, characterized in that, A limiting groove is provided on the outer wall of the lifting plate. The limiting groove extends in a wave shape in the circumferential direction of the first rotating ring. The first slide rod assembly includes a first slide rod. One end of the first slide rod is fixed to the first rotating ring, and the other end of the first slide rod slides in cooperation with the limiting groove.

4. The aperture adjustment device according to claim 3, characterized in that, The first slide rod assembly further includes a first limiting bearing fitted onto the first slide rod, the inner ring of the first limiting bearing being fixed to the first slide rod, and the outer ring of the first limiting bearing engaging with the limiting groove.

5. The aperture adjustment device according to claim 2, characterized in that, It also includes a plurality of connecting rods arranged parallel to the first direction. One end of each connecting rod is fixed to the mounting base, and the other end of each connecting rod is fixed to the blade mounting plate. A plurality of mating holes are provided on the lifting plate, and each mating hole is fitted onto each connecting rod in a corresponding manner. The mating holes and the connecting rods slide in the first direction.

6. The aperture adjustment device according to claim 2, characterized in that, The blade unit includes a second rotating ring, a connecting bearing, a blade assembly, and a second slide rod assembly. The blade assembly is connected to the second rotating ring, the second rotating ring is connected to the lifting plate via the connecting bearing, and the second rotating ring is connected to the first rotating ring via the second slide rod assembly. By controlling the rotation of the first rotating ring, the second rotating ring is driven to rotate relative to the lifting plate and move in the first direction.

7. The aperture adjustment device according to claim 6, characterized in that, The second slide rod assembly includes a second slide rod and a second limiting bearing fitted onto the second slide rod. The first transmission unit includes a groove guide fixed to the first rotating ring. The inner ring of the second limiting bearing is fixedly connected to the second slide rod, and the outer ring of the second limiting bearing cooperates with the groove guide in the first direction.

8. The aperture adjustment device according to claim 6, characterized in that, The blade assembly includes an elastic element, a blade dial, and a blade. In the first direction, the blade mounting plate, the elastic element, the blade, and the blade dial are arranged sequentially and in sequential pressure contact. The blade dial and the blade mounting plate are both pivotally connected to the blade. The blade dial is fixedly connected to the second rotating ring.

9. The aperture adjustment device according to any one of claims 1 to 8, characterized in that, It also includes a motor and an end face gear, the end face gear being coaxially arranged with the first rotating ring and fixed to the first rotating ring, the motor being fixed to the mounting base, and the motor and the end face gear engaging in transmission.

10. An optical system, characterized in that, Includes the aperture adjustment device as described in any one of claims 1 to 9.

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