Aperture structure, lens and camera device

Abstract

The application discloses an aperture structure, a lens and a camera equipment, and relates to the technical field of optical systems, wherein the aperture structure comprises a base and an adjusting structure; one end surface of the base in a first direction is provided with a light transmission hole; the adjusting structure comprises a plurality of adjusting blades; the plurality of adjusting blades are arranged at the circumferential side of the light transmission hole at intervals around an axis extending in the first direction; and the plurality of adjusting blades are relatively movably arranged in the direction of approaching or moving away from the axis of the light transmission hole; the end part of the plurality of adjusting blades towards the light transmission hole forms a limiting end; the limiting end is provided with a plurality of circular arc segments arranged along the circumference of the light transmission hole; the radius of curvature of the plurality of circular arc segments is sequentially increased from the middle area of the limiting end to the two sides; and the corresponding circular arc segments of the plurality of adjusting blades can enclose a circular light transmission area. In this way, the probability of diffraction of light passing through the light transmission area can be reduced, the formation of star rays can be inhibited, and the imaging clarity and uniformity can be improved.

Description

Technical Field

[0001] This invention relates to the field of optical system technology, and in particular to an aperture structure, lens, and imaging device. Background Technology

[0002] The solenoid valve-type two-blade aperture commonly used in traditional security lenses has inherent morphological defects during its opening and closing process. When the aperture is fully open, the two blades retract to their extreme positions, and the inner edges of the blades form a complete circular light-transmitting aperture.

[0003] However, since the blades are typically composed of an arc segment and a right-angle segment, when the drive component controls the two blades to move towards each other to reduce the area of ​​the light-transmitting region, this region gradually evolves from a complete circle into a rectangle. At this point, at least two sharp angles, or equivalently two distinct acute-angled structures, will be created on the outline of the light-transmitting region. When light passes through such a light-transmitting aperture with acute-angled edges, diffraction occurs. This diffraction causes a change in the propagation path of the light, resulting in a significant starburst effect in the final image. Summary of the Invention

[0004] The main objective of this invention is to propose an aperture structure, lens, and imaging device that aims to improve the problem of significant starbursts formed in the image image by existing aperture structures.

[0005] To achieve the above objectives, the aperture structure proposed in this invention includes: A base, wherein a light-transmitting hole is provided through one end face of the base in a first direction; and, The adjustment structure includes multiple adjustment blades, which are spaced apart around the periphery of the light-transmitting hole along an axis extending in a first direction. The multiple adjustment blades are relatively movable in a direction close to or away from the axis of the light-transmitting hole. The ends of the multiple adjustment blades facing the light-transmitting hole form a limiting end. The limiting end has multiple arc segments arranged circumferentially along the light-transmitting hole. From the middle region of the limiting end toward both sides, the radii of curvature of the multiple arc segments are sequentially increased. The corresponding arc segments of the multiple adjusting blades can be enclosed to form a circular light-transmitting area.

[0006] In one embodiment, in each of the adjusting blades, the plurality of arc segments include two final-stage arc segments in the central region of the light-transmitting hole in the circumferential direction away from the defining end, the radius of curvature of each final-stage arc segment is A, the radius of the light-transmitting hole is B, and A≥B.

[0007] In one embodiment, in each of the adjusting blades, the plurality of arc segments include a first arc segment and at least one arc group, the arc group including two second arc segments, the two second arc segments being respectively disposed on opposite sides of the first arc segment in the circumferential direction of the light-transmitting hole, and the two second arc segments having equal radii of curvature.

[0008] In one embodiment, each of the two second arc segments of the arc group has two opposite ends, one end of each second arc segment is connected to the first arc segment, and the other end is used to connect with the second arc segment of another adjustment structure.

[0009] In one embodiment, a plurality of the adjusting blades are synchronously arranged to move along an axis that is close to or far from the light-transmitting hole.

[0010] In one embodiment, the aperture structure further includes multiple guide structures, each guide structure corresponding to a plurality of adjustment blades. Each guide structure includes a guide portion and a mating portion. The guide portion is disposed on one of the base and the corresponding adjustment blade and extends radially in the light-transmitting hole. The mating portion is disposed on the other of the base and the corresponding adjustment blade and is movably mated with the guide portion in the extending direction of the guide portion.

[0011] In one embodiment, each of the adjusting blades is provided with a slide rail, which extends radially along the light-transmitting hole; The base is provided with a plurality of protrusions on one end face in the first direction, each of the protrusions being provided with a slide rail and being movably engaged with the slide rail; The guide portion includes the slide, and the mating portion includes the protrusion.

[0012] In one embodiment, there are two adjusting blades, which are arranged radially on opposite sides of the light-transmitting hole and are movably arranged relative to each other in a direction toward each other.

[0013] The present invention also proposes a lens comprising the aperture structure described above.

[0014] The present invention also proposes a camera device, including the lens described above.

[0015] In the technical solution of this invention, when multiple adjusting blades move towards or away from the axis of the light-transmitting aperture, so that the corresponding arc segments of the multiple adjusting blades enclose a circular light-transmitting area, light can pass through the light-transmitting aperture on the base and the circular light-transmitting area composed of the multiple adjusting blades in sequence for imaging. At this time, the light-transmitting area composed of the multiple adjusting blades can also serve as an aperture. By adjusting the position of the blades, the actual aperture size of the light-transmitting area can be changed, thereby controlling the amount of light entering. When the actual aperture size of the light-transmitting area needs to be increased, since the radii of curvature of the multiple arc segments increase sequentially from the middle region of the limiting end towards both sides, if it is necessary to increase the actual aperture size of the light-transmitting area, the multiple adjusting blades can be driven along the axis away from the light-transmitting aperture. The relative movement of the blades allows the arc segments with larger radii of curvature to enclose and form a light-transmitting area, thereby increasing the aperture of the light-transmitting area. Since the light-transmitting area is formed by multiple arc segments, these arc segments collectively constrain the shape of the light-transmitting area, ensuring that the light-transmitting area remains circular even after the aperture is increased. If it is necessary to reduce the actual aperture of the light-transmitting area, multiple adjusting blades can be driven to move relative to each other along the axis close to the light-transmitting hole. This allows the arc segments with smaller radii of curvature to enclose and form a light-transmitting area, thereby reducing the aperture of the light-transmitting area. Similarly, since the light-transmitting area is formed by multiple arc segments, these arc segments collectively constrain the shape of the light-transmitting area, ensuring that the light-transmitting area remains circular even after the aperture is reduced. This configuration, by driving multiple adjusting blades to move relative to each other on the base along the axis close to or far from the light-transmitting aperture, allows arc segments with different radii of curvature to enclose and form a light-transmitting area. This ensures that the light-transmitting area maintains an approximately circular outline under different light-transmitting aperture diameters. The structure is simple, the adjustment method is convenient, and it can avoid the outline of the light-transmitting area from having angles without increasing the number of additional parts. This reduces the probability of light diffraction when passing through the light-transmitting area, thereby suppressing the formation of starbursts and improving image clarity and uniformity. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the aperture structure (large aperture) provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the medium aperture structure (small aperture).

[0018] Explanation of icon numbers: 100. Aperture structure; 1. Base; 11. Light aperture; 2. Adjustment structure; 21. Adjustment blade; 22. Arc segment; 221. First arc segment; 222. Second arc segment; 3. Guide structure; 31. Guide part; 32. Protrusion.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] The solenoid valve-type two-blade aperture commonly used in traditional security lenses has inherent morphological defects during its opening and closing process. When the aperture is fully open, the two blades retract to their extreme positions, and the inner edges of the blades form a complete circular light-transmitting aperture.

[0024] However, since the blades are typically composed of an arc segment and a right-angle segment, when the drive component controls the two blades to move towards each other to reduce the area of ​​the light-transmitting region, this region gradually evolves from a complete circle into a rectangle. At this point, at least two sharp angles, or equivalently two distinct acute-angled structures, will be created on the outline of the light-transmitting region. When light passes through such a light-transmitting aperture with acute-angled edges, diffraction occurs. This diffraction causes a change in the propagation path of the light, resulting in a significant starburst effect in the final image.

[0025] This invention proposes an aperture structure designed to improve the problem of existing aperture structures creating significant starbursts in the image.

[0026] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the aperture structure 100 includes a base 1 and an adjustment structure 2. The base 1 has a light-transmitting hole 11 through one end face in a first direction. The adjustment structure 2 includes a plurality of adjustment blades 21. The plurality of adjustment blades 21 are arranged at intervals around the axis extending in the first direction and around the periphery of the light-transmitting hole 11. The plurality of adjustment blades 21 are relatively movable in the direction close to or away from the axis of the light-transmitting hole 11. The ends of the plurality of adjustment blades 21 facing the light-transmitting hole 11 form a limiting end. The limiting end has a plurality of arc segments 22 arranged circumferentially along the light-transmitting hole. From the middle region of the limiting end toward both sides, the radius of curvature of the plurality of arc segments 22 is arranged sequentially. The corresponding arc segments 22 of the plurality of adjustment blades 21 can enclose and form a circular light-transmitting area.

[0027] In the technical solution of this invention, when multiple adjusting blades 21 move toward the axis of the light-transmitting hole 11, so that the corresponding arc segments 22 of the multiple adjusting blades 21 enclose a circular light-transmitting area, light can pass through the light-transmitting hole 11 on the base 1 and the circular light-transmitting area composed of the multiple adjusting blades 21 in sequence for imaging. At this time, the light-transmitting area composed of the multiple adjusting blades 21 can also serve as an aperture. By adjusting the position of the blades 21, the actual aperture size of the light-transmitting area can be changed, thereby controlling the amount of light entering. When the actual aperture size of the light-transmitting area needs to be increased, since the radius of curvature of the multiple arc segments 22 increases sequentially from the middle area of ​​the limiting end toward both sides, if it is necessary to increase the actual aperture size of the light-transmitting area, the multiple adjusting blades 21 can be driven along the axis away from the light-transmitting hole 11. The relative movement of the lines allows the arc segments 22 with larger radii of curvature to enclose and form a light-transmitting area, thereby increasing the aperture of the light-transmitting area. Since the light-transmitting area is formed by multiple arc segments 22, these arc segments 22 can collectively restrict the shape of the light-transmitting area, ensuring that the light-transmitting area remains circular even after the aperture is increased. If it is necessary to reduce the actual aperture of the light-transmitting area, multiple adjusting blades 21 can be driven to move relative to each other along the axis close to the light-transmitting hole 11. This allows the arc segments 22 with smaller radii of curvature to enclose and form a light-transmitting area, thereby reducing the aperture of the light-transmitting area. Again, since the light-transmitting area is formed by multiple arc segments 22, these arc segments 22 can collectively restrict the shape of the light-transmitting area, ensuring that the light-transmitting area remains circular even after the aperture is reduced. With this configuration, by driving multiple adjusting blades 21 to move relative to each other on the base 1 along the axis close to or far from the light-transmitting hole 11, arc segments 22 with different radii of curvature can be formed to enclose the light-transmitting area. This ensures that the light-transmitting area maintains an approximately circular outline under different light-transmitting apertures. The structure is simple, the adjustment method is convenient, and it can avoid the outline of the light-transmitting area from having an angle without increasing the number of additional parts. This reduces the probability of light diffraction when passing through the light-transmitting area, thereby suppressing the formation of starbursts and improving the clarity and uniformity of the image.

[0028] In the above embodiment, the arc segment 22 corresponding to the multiple adjusting blades 21 refers to the arc segment that each adjusting blade 21 participates in enclosing and forming the outline of the light-transmitting area in the circumferential direction of the light-transmitting hole 11. When the position of the adjusting blade 21 moves, the arc segment 22 that participates in enclosing the outline of the light-transmitting area also changes accordingly, always ensuring that the outer outline of the light-transmitting area is jointly formed by the arcs with corresponding curvature, avoiding sharp corners on the outline due to the adjustment of the light-transmitting aperture.

[0029] It should be noted that the number of arc segments 22 on the multiple adjusting blades 21 is the same. This ensures that when each adjusting blade 21 participates in enclosing the outline of the light-transmitting area, the curvature change law of each arc segment is consistent, and the outline of the light-transmitting area will not be distorted due to differences in blade structural parameters, thus ensuring that the roundness of the outline meets the design requirements.

[0030] Furthermore, by setting the curvature radius of the multiple arc segments 22 to increase sequentially from the central region of the defined end towards both sides, this avoids the portion of the arc segment 22 with a smaller curvature radius being exposed inside the outline of the light-transmitting area when the arc segments 22 corresponding to the multiple blade structures enclose a large-diameter light-transmitting area. This prevents the portion of the arc segment 22 from blocking light and also avoids the formation of unnecessary angular structures on the outline of the light-transmitting area, ensuring the integrity and roundness of the outline of the light-transmitting area under a large diameter. When the arc segments 22 corresponding to the multiple blade structures enclose a small-diameter light-transmitting area, the portion of the arc segment 22 with a larger curvature radius on each adjusting blade 21 can be blocked by other adjusting blades 21. This also avoids the formation of sharp angles at the edges of the light-transmitting area, ensuring that the aperture structure 100 can stably maintain the circular outline of the light-transmitting area throughout the entire adjustment range from the smallest to the largest light-transmitting aperture, thereby stably suppressing the formation of starbursts.

[0031] Meanwhile, the number of arc segments 22 can be flexibly set according to the expected light transmission aperture adjustment range and accuracy requirements of the aperture structure 100. For example, the number of arc segments 22 on each adjustment blade 21 can be three, four, five, or even other numbers.

[0032] It is understandable that, since the radii of curvature of the multiple arc segments 22 increase sequentially from the central region of the limiting end toward both sides, in some embodiments, the number of arc segments 22 on each adjusting blade 21 is set to an odd number. This ensures that there is an arc segment 22 located at the center of the limiting end. When enclosing the minimum light-transmitting aperture, only this arc segment 22 at the center of the multiple adjusting blades 21 participates in the contour formation. At this point, the radius of curvature is the smallest, which meets the design requirements for the roundness of the contour under the minimum aperture. Subsequently, as the light-transmitting aperture gradually increases, the arc segments 22 with increasing radii of curvature on both sides participate in the contour enclosure sequentially, ensuring that the roundness of the contour remains stable and uniform throughout the entire adjustment process.

[0033] Similarly, the present invention does not limit the specific number of adjusting blades 21. In the present invention, the number of adjusting blades 21 can be set to two, three, four or even other numbers.

[0034] In some embodiments, two adjusting blades 21 are provided, which are radially disposed on opposite sides of the light-transmitting aperture 11 and are movably arranged relative to each other in a direction toward each other. With this arrangement, the aperture of the light-transmitting area can be adjusted simply by driving the two adjusting blades 21 to move closer or further apart in a linear motion. The drive structure is simple, the number of parts is small, and the processing and assembly costs of the aperture structure 100 can be further reduced, and the overall size of the aperture structure 100 can be reduced.

[0035] When the corresponding arc segments 22 of multiple adjusting blades 21 can enclose a circular light-transmitting area, in order to avoid the light-transmitting area blocking the light-transmitting hole 11 when adjusted to the maximum diameter, resulting in a loss of light intake, in some embodiments, each adjusting blade 21 includes two final-stage arc segments 22 in the central region of the circumference of the light-transmitting hole 11 away from the limiting end. The radius of curvature of each final-stage arc segment 22 is A, and the radius of the light-transmitting hole 11 is B, where A ≥ B. With this configuration, when the light-transmitting area is adjusted to the maximum diameter, the radius of the outline of the light-transmitting area enclosed by the final-stage arc segments 22 is greater than or equal to the radius of the light-transmitting hole 11 on the base 1, preventing the adjusting blades 21 from blocking the light-transmitting hole 11 area of ​​the base 1, ensuring that the maximum light intake can meet the design requirements, and preventing additional loss of light intake.

[0036] It is understood that in the above embodiments, only when the light-transmitting aperture is adjusted to the maximum, the limiting end of the adjusting blade 21 moves to the outer periphery of the light-transmitting hole 11, and only the final arc segment 22 participates in the contour enclosure of the maximum light-transmitting area. When the aperture of the light-transmitting area is reduced so that other arc segments 22 participate in the enclosure to form the light-transmitting area, the limiting end of the adjusting blade 21 will extend into the range of the light-transmitting hole 11. The arc segments 22 with corresponding curvature radii will jointly enclose the circular light-transmitting contour of the required size, thereby achieving accurate control of the amount of light entering the device.

[0037] Furthermore, when the corresponding arc segments 22 of the multiple adjustment blades 21 can enclose and form a circular light-transmitting area, in order to ensure the uniformity of the radius of curvature at each point in the light-transmitting area and thus ensure the stability of the imaging quality, in some embodiments, each adjustment blade 21 includes a first arc segment 221 and at least one arc group. The arc group includes two second arc segments 222, which are respectively disposed on opposite sides of the first arc segment 221 in the circumferential direction of the light-transmitting hole 11, and the radii of curvature of the two second arc segments 222 are set to be equal. With this configuration, the first arc segment 221 of multiple adjusting blades 21 can enclose and form a light-transmitting area to obtain a light-transmitting area with a corresponding aperture. Since the curvature radii of the second arc segments 222 on both sides of the first arc segment 221 are symmetrical and equal, when the light-transmitting aperture increases, the curvature of each part of the light-transmitting area outline can also remain symmetrical and uniform when the second arc segments 222 on both sides participate in the enclosure. There will be no asymmetrical distortion with excessive curvature on one side and insufficient curvature on the other side, which further ensures the roundness of the light-transmitting area and improves the effect of suppressing starbursts.

[0038] It is understood that in the above embodiments, the second arc segment 222 includes the final arc segment 22.

[0039] In other embodiments, when multiple arc groups are provided, the first arc segment 221 is provided with multiple second arc segments 222 on both sides of the light-transmitting hole 11 in the circumferential direction. The multiple second arc segments 222 are arranged sequentially away from the first arc segment 221 in the circumferential direction of the light-transmitting hole 11. Among two adjacent second arc segments 222, the radius of curvature of the second arc segment 222 away from the first arc segment 221 is greater than the radius of curvature of the second arc segment 222 close to the first arc segment 221. This makes the radius of curvature of the multiple second arc segments 222 conform to the setting rule of the radius of curvature increasing sequentially from the middle of the defined end to both sides, ensuring that the change of the outline roundness is smooth and uniform during the process of increasing the light-transmitting aperture, and avoiding abrupt changes in the roundness of the light-transmitting area.

[0040] To ensure smoothness of the aperture change during the relative movement of multiple adjusting blades 21 to adjust the aperture of the light-transmitting area, in some embodiments, the two second arc segments 222 of the arc group each have two opposite ends. One end of each second arc segment 222 is connected to the first arc segment 221, and the other end is used to connect with the second arc segment 222 of another adjusting structure 2. With this configuration, when the multiple adjusting blades 21 move relative to each other in the direction close to or away from the axis of the light-transmitting aperture 11, the transition between two adjacent arc segments 22 can be smooth, and sharp angles will not be formed at the junction of the two arc segments 22. This avoids induced ray diffraction when the angles are exposed on the outline of the light-transmitting area, further ensuring the smoothness of the outline of the light-transmitting area.

[0041] Meanwhile, since adjacent arc segments 22 are connected end-to-end, when multiple first arc segments 221 enclose a light-transmitting area, the second arc segment 222 is prevented from being exposed in the light-transmitting area, so as not to block the incident light in the light-transmitting area. Similarly, when multiple second arc segments 222 enclose a light-transmitting area, the first arc segment 221 is also prevented from being exposed in the light-transmitting area, thereby avoiding ineffective blocking of incident light and ensuring the accuracy of image exposure.

[0042] In some further embodiments, to further improve the smoothness of aperture switching in the light-transmitting area, an arc transition connection is adopted between adjacent arc segments 22 to eliminate the sharp corners at the junction of two adjacent arc segments 22, so that the outline of the entire defined end always maintains a smooth and continuous curve shape, thereby avoiding the generation of outline bends from the root and further enhancing the suppression effect on starbursts.

[0043] Furthermore, the present invention does not limit the specific form in which the multiple adjusting blades 21 move relative to each other in the direction of the axis near or away from the light-transmitting aperture 11. In some embodiments, some adjusting blades 21 are fixedly arranged in the direction of the axis near or away from the light-transmitting aperture 11, while other blades are movably arranged in the direction of the axis near or away from the light-transmitting aperture 11. In this way, the actual aperture of the light-transmitting area can be changed by simply driving the moving rod of some adjusting blades 21 to adjust the position of those blades 21. This reduces the number of components that need to be driven synchronously, simplifies the structural design of the adjustment drive mechanism, reduces the overall processing and assembly difficulty of the aperture structure 100, and makes it easier to reduce the overall volume of the aperture structure 100 to meet the requirements of miniaturized lens design.

[0044] In other embodiments, multiple adjustment blades 21 are synchronously arranged along an axis approaching or away from the light-transmitting aperture 11. This arrangement allows the positions of the multiple adjustment blades 21 to be adjusted synchronously, ensuring the geometric symmetry of the light-transmitting area's contour remains stable. It prevents contour distortion due to asynchronous blade positions, further guaranteeing the roundness of the light-transmitting area across the entire adjustment range and effectively suppressing starburst effects. The synchronous adjustment design also facilitates the layout of the drive mechanism; only one linkage mechanism is needed to drive all adjustment blades 21 synchronously, simplifying the design logic of the drive structure, reducing the probability of adjustment jamming in the aperture structure 100, and improving the reliability and stability of the adjustment action.

[0045] It should be noted that the present invention does not limit the specific driving form of the multiple adjustment blades 21. In some embodiments, the multiple adjustment blades 21 can be driven manually by the operator in conjunction with a linkage structure to achieve synchronous movement. In this way, when it is necessary to adjust the aperture size of the light-transmitting area, the operator can directly drive the adjustment blades 21 to move through a manual lever, manual wheel, or other structure without the need for an additional electric drive module. This simplifies the circuit design of the aperture structure 100 and reduces the overall production cost of the aperture structure 100 and the corresponding lens.

[0046] In other embodiments, the multiple adjusting blades 21 can also be automatically driven by an electric drive unit in conjunction with a linkage mechanism. In this way, the electric drive unit can drive the linkage mechanism to move, thereby causing the multiple adjusting blades 21 to synchronously complete the position adjustment, realizing the automatic adjustment of the aperture of the light-transmitting area, and improving the convenience and intelligence of the equipment.

[0047] In order to ensure the accuracy of the movement direction of the multiple adjustment blades 21 during the synchronous movement of the multiple adjustment blades 21 and to avoid the deviation of the movement direction of some adjustment blades 21, which would cause the curvature radius of the light transmission area to deviate, in some embodiments, the aperture structure 100 also includes multiple guide structures 3. Multiple guide parts 31 are respectively provided for multiple adjustment blades 21. Each guide structure 3 includes a guide part 31 and a mating part. The guide part 31 is provided in one of the base 1 and the corresponding adjustment blade 21 and extends radially in the light transmission hole 11. The mating part is provided in the other of the base 1 and the corresponding adjustment blade 21 and moves relative to the guide part 31 in the extension direction of the guide part 31. With this configuration, each adjusting blade 21, as it approaches or moves away from the axis of the light-transmitting aperture 11, can move along the extension direction of the guide 31 under the combined action of the guide 31 and the mating part. This achieves stable radial movement along the light-transmitting aperture 11, preventing deviation in the direction of movement due to uneven force on the adjusting blade 21 or assembly gaps. This ensures the accuracy and stability of the movement trajectory of multiple adjusting blades 21, further guaranteeing the stability of the roundness of the light-transmitting area's contour and avoiding distortion of the light-transmitting area's contour due to blade deviation. At the same time, the cooperation between the guide 31 and the mating part also improves the smoothness of the adjusting blade 21's movement, reduces the probability of the adjusting blade 21 getting stuck or jammed during movement, and improves the reliability of the aperture structure 100's adjustment operation.

[0048] It should be noted that the present invention does not limit the specific structural form of the guide part 31 and the mating part. In some embodiments, each adjusting blade 21 is provided with a slide rail, which extends radially along the light-transmitting hole 11. One end face of the base 1 in the first direction is provided with a plurality of protrusions 32, each protrusion 32 corresponding to a slide rail and being movably engaged with the slide rail. The guide part 31 includes the slide rail, and the mating part includes the protrusions 32. With this configuration, during the movement of the adjusting blade 21, the protrusions 32 can always slide relative to the slide rail along the extension direction of the slide rail, thereby restricting the movement path of the adjusting blade 21. The structure is simple, easy to process and assemble, and does not increase the axial dimension of the aperture structure 100, thus meeting the miniaturization design requirements of the aperture structure 100.

[0049] In other embodiments, the guide protrusion 32 can be disposed on the adjusting blade 21, and the guide slide can be correspondingly opened on the base 1. Similarly, the relative cooperation between the slide and the protrusion 32 can limit and guide the movement direction of the adjusting blade 21.

[0050] In some other embodiments of the present invention, the guide portion 31 may also be configured as a guide protrusion, and the corresponding mating portion may be configured as a guide groove that matches the profile of the protrusion. Both the guide protrusion and the guide groove extend radially along the light-transmitting hole 11. After the two are engaged, the movement direction of the adjusting blade 21 can be precisely restricted, and it has good force stability. This can reduce the probability of the adjusting blade 21 tilting and swaying during its movement and improve the stability of the adjusting action.

[0051] In other embodiments of the present invention, the guide portion 31 and the mating portion may also be configured in other structural forms, which can be selected according to the requirements during actual installation.

[0052] In summary, the aperture structure 100 proposed in this invention sets multiple arc segments 22 with different radii of curvature at the defined end of each adjustment blade 21. By changing the relative position of the adjustment blade 21, the arc segments 22 participating in the enclosure can be switched. Without the need for additional components, the circular outline of the light-transmitting area can be guaranteed within the full aperture adjustment range, effectively avoiding sharp angles in the outline, suppressing starburst formation, and significantly improving the clarity and uniformity of the image. The overall structure is simple and the adjustment method is convenient.

[0053] The present invention also proposes a lens, which includes an aperture structure 100. The specific structure of the aperture structure 100 is as described in the above embodiments. Since this lens adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] The present invention also proposes a camera device, which includes a lens. The specific structure of the lens is as described in the above embodiments. Since the camera device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An aperture structure, characterized in that, include: The base has a light-transmitting hole through one end face in the first direction; as well as, The adjustment structure includes multiple adjustment blades, which are spaced apart around the periphery of the light-transmitting hole along an axis extending in a first direction. The multiple adjustment blades are relatively movable in a direction close to or away from the axis of the light-transmitting hole. The ends of the multiple adjustment blades facing the light-transmitting hole form a limiting end. The limiting end has multiple arc segments arranged circumferentially along the light-transmitting hole. From the middle region of the limiting end toward both sides, the radii of curvature of the multiple arc segments are sequentially increased. The corresponding arc segments of the multiple adjusting blades can be enclosed to form a circular light-transmitting area.

2. The aperture structure as described in claim 1, characterized in that, In each of the aforementioned adjusting blades, the plurality of said arc segments include two final-stage arc segments in the central region of the circumferential direction of the light-transmitting hole away from the defined end, the radius of curvature of each of the final-stage arc segments is A, the radius of the light-transmitting hole is B, and A≥B.

3. The aperture structure as described in claim 1, characterized in that, In each of the aforementioned adjusting blades, the plurality of arc segments include a first arc segment and at least one arc group. The arc group includes two second arc segments, which are respectively disposed on opposite sides of the first arc segment in the circumferential direction of the light-transmitting hole, and the two second arc segments have equal radii of curvature.

4. The aperture structure as described in claim 3, characterized in that, The two second arc segments of the arc group each have two opposite ends. One end of each second arc segment is connected to the first arc segment, and the other end is used to connect with the second arc segment of another adjustment structure.

5. The aperture structure as described in claim 1, characterized in that, Multiple adjusting blades are synchronously arranged to move along an axis that is close to or far from the light-transmitting hole.

6. The aperture structure as described in claim 5, characterized in that, The aperture structure also includes multiple guide structures, each guide structure corresponding to a multiple adjustment blade. Each guide structure includes a guide portion and a mating portion. The guide portion is located on one of the base and the corresponding adjustment blade and extends radially in the light-transmitting hole. The mating portion is located on the other of the base and the corresponding adjustment blade and is movably mated to the guide portion in the extending direction of the guide portion.

7. The aperture structure as described in claim 6, characterized in that, Each of the adjusting blades is provided with a slide rail, which extends radially along the light-transmitting hole; The base is provided with a plurality of protrusions on one end face in the first direction, each of the protrusions being provided with a slide rail and being movably engaged with the slide rail; The guide portion includes the slide, and the mating portion includes the protrusion.

8. The aperture structure as described in claim 1, characterized in that, The adjustment blades are provided in two parts, which are arranged on opposite sides of the light-transmitting hole along the radial direction of the light-transmitting hole, and are movable relative to each other in the direction towards each other.

9. A lens, characterized in that, Includes the aperture structure as described in any one of claims 1 to 8.

10. A camera device, characterized in that, Includes the lens as described in claim 9.

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