Variable diaphragm adjusting device

Abstract

The utility model relates to the technical field of optical instruments, and provides a variable diaphragm adjusting device which comprises a platform plate, a clamping plate and a position adjusting assembly. The connecting plate is arranged on one side of the platform plate and is in sliding connection with the platform plate, and a first transmission part is arranged on the connecting plate; a diaphragm assembly is arranged on the outer side wall of the connecting plate and connected with the connecting plate through a distance adjusting mechanism. The clamping plate is arranged on the other side of the platform plate and is in sliding connection with the platform plate, and a second transmission part is arranged on the clamping plate; the first transmission part and the second transmission part are both in transmission connection with the position adjusting assembly. The diaphragm assembly can move in the horizontal direction and the vertical direction and can be far away from or close to the platform plate, movement of the diaphragm assembly in all directions can be met, the flexibility of the diaphragm assembly is improved, the whole structure is more compact in the mode that the clamping plates and the connecting plates are located on the two sides of the platform plate, and the working efficiency is improved. Adjustment in the horizontal direction and the vertical direction can be achieved through the adjusting assembly at the same position, and the complexity of adjustment is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, in particular to a variable iris adjustment device. Background Art

[0002] An iris diaphragm is an optical device used to adjust the amount of light or the diameter of a light beam. Adjusting the light beam requires adjusting the iris' position to match the beam's direction, ensuring high-quality adjustment.

[0003] In some typical implementations, the diaphragm is connected to an adjustment device for adjustment. Conventional adjustment devices need to be adjusted in all directions, so the overall structure is usually complex and the overall space occupied is large, which limits the adjustment device. Utility Model Content

[0004] The utility model provides a variable aperture adjustment device to solve the defects of conventional mechanical adjustment in the prior art, such as limited application scenarios and low flexibility. For automatic adjustment, its structure is complex, resulting in limited adjustment and high cost, which makes it difficult to meet the needs of occasions with larger light apertures.

[0005] The utility model provides a variable aperture adjustment device, comprising: a platform plate, a connecting plate, a clamping plate, a position adjustment assembly and an aperture assembly; the connecting plate is arranged on one side of the platform plate, and is slidably connected to the platform plate in the horizontal direction, and a first transmission part is connected to the connecting plate; the outer side wall of the connecting plate is provided with the aperture assembly, and the aperture assembly is connected to the connecting plate through a distance adjustment mechanism, and the distance adjustment mechanism is used to adjust the aperture assembly to be close to or away from the platform plate; the clamping plate is arranged on the other side of the platform plate, and is slidably connected to the platform plate in the vertical direction, and a second transmission part is provided on the clamping plate; the position adjustment assembly is arranged on the platform plate, and the first transmission part and the second transmission part are both transmission-connected to the position adjustment assembly, so as to drive the connecting plate to move in the horizontal direction and / or vertical direction relative to the clamping plate.

[0006] According to the variable aperture adjustment device provided by the present invention, the position adjustment assembly includes an adjustment seat and a knob mechanism, the adjustment seat is fixedly arranged on the platform plate, and the knob mechanism is rotatably arranged on the adjustment seat; the knob mechanism includes a first knob part and a second knob part, the first knob part is connected to the first transmission part through a wire rope transmission system to drive the connecting plate to move in the horizontal direction relative to the clamping plate; the second knob part is connected to the second transmission part through a gear rack transmission system to drive the platform plate and the connecting plate to move in the vertical direction relative to the clamping plate.

[0007] According to the variable aperture adjustment device provided by the utility model, the knob mechanism also includes a core shaft, one end of the core shaft is connected to a rotating wheel, a steel wire rope is wound around the rotating wheel, and the other end of the core shaft is connected to the first knob part; the outer sleeve of the core shaft is provided with a shaft sleeve, the outer sleeve is provided with an outer shaft tooth, one end of the outer shaft tooth is connected to the second knob part, and the other end of the outer shaft tooth is provided with a transmission gear.

[0008] According to the variable iris adjustment device provided by the present invention, the second transmission part includes a rack block, and the rack block is meshed with the transmission gear for transmission.

[0009] According to the variable aperture adjustment device provided by the present invention, the first transmission part includes a pulley and a slider, the wire rope is wound between the pulley and the rotating wheel to form the wire rope transmission system, and the first transmission part is connected to the wire rope; the platform plate is provided with a guide rail part in the horizontal direction, the slider is slidably connected to the guide rail part, and the connecting plate is connected to the slider.

[0010] According to the variable aperture adjustment device provided by the present invention, the platform plate is provided with a vertical slide groove along the vertical direction; steel ball isolators are provided on two opposite sides of the vertical slide groove, and the clamping plate is slidably arranged in the vertical slide groove and contacts the steel ball isolators.

[0011] According to the variable aperture adjustment device provided by the utility model, a strip hole is provided on the platform plate on one side of the vertical slide groove; a connecting block is provided on the side of the clamping plate close to the strip hole, and a cursor module is provided on the connecting block.

[0012] According to the variable aperture adjustment device provided by the present invention, the distance adjustment mechanism includes a connecting seat, a fine-adjustment seat and a coarse-adjustment seat, one end of the connecting seat is connected to the aperture assembly, and the other end of the connecting seat is threadedly connected to the fine-adjustment seat, the fine-adjustment seat is sleeved on the outside of the coarse-adjustment seat, and the coarse-adjustment seat is connected to the connecting plate.

[0013] According to the variable iris adjustment device provided by the utility model, a locking screw is provided on the fine-tuning seat, and the locking screw is used to lock or loosen the fine-tuning seat.

[0014] According to the variable aperture adjustment device provided by the present invention, the aperture assembly includes an aperture seat and an aperture cover, the aperture cover is connected to the aperture seat, and a first annular groove for installing frosted glass and a second annular groove for installing a color filter are provided in the aperture seat; the aperture seat is provided with a blade adjustment assembly and a dial, the blade adjustment assembly is provided in the aperture seat, and the dial is rotatably provided on the outside of the aperture seat, and the dial is used to adjust the blade adjustment assembly to adjust the aperture of the light passing through.

[0015] The utility model provides a variable aperture adjustment device, which, through the arrangement of a position adjustment component and a distance adjustment mechanism, can realize the movement of the aperture component in the horizontal direction and the vertical direction, and can move away from or close to a platform plate, thereby satisfying the movement of the aperture component in various directions and improving its flexibility. In addition, by locating the clamping plate and the connecting plate on both sides of the platform plate, the overall structure is made more compact, and the horizontal and vertical adjustments can be realized through the same position adjustment component, simplifying the complexity of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a main structural diagram of the variable aperture adjustment device provided by the utility model.

[0018] Figure 2 It is a cross-sectional structural assembly diagram of the variable aperture adjustment device provided by the utility model.

[0019] Figure 3 The utility model provides Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 4 This is the rear view structure diagram of the variable aperture adjustment device provided by the utility model

[0021] Reference numerals:

[0022] 10. Platform plate; 11. Vertical slide; 12. Strip groove; 13. Guide rail; 14. Receiving groove; 20. Clamping plate; 21. Rack block; 22. Ball isolator; 23. Connecting block; 30. Connecting plate; 40. Position adjustment assembly; 41. Adjustment seat; 42. Mandrel; 43. First knob; 44. Second knob; 45. Rotating wheel; 46. Bushing; 47. Outer sleeve shaft gear; 50 , first transmission part; 51, reel; 511, wire rope; 52, slider; 60, pitch adjustment mechanism; 61, connecting seat; 62, fine adjustment seat; 63, coarse adjustment seat; 64, locking screw; 70, aperture assembly; 71, aperture seat; 711, blade pitch adjustment assembly; 712, dial; 72, aperture cover; 721, first annular groove; 722, second annular groove; 723, spring sleeve; 73, pressure ring. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of facilitating the explanation of the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0028] In related technologies, irises are often used in conjunction with adjustment devices. In some typical implementations, these devices employ a specialized iris range and mechanical motion mechanism designed to meet the imaging requirements of the optical system. These irises function solely as dedicated irises for a single optical system, moving and adjusting the aperture size within the designed range. Mechanical dimming is often employed. This approach is limited to specific scenarios, offering limited flexibility and hindering widespread adoption.

[0029] Other typical implementations employ automatic dimming, specifically feedback adjustment using photoresistors. However, due to the limited photoelectric conversion accuracy and low dynamic performance of photoresistors, they cannot achieve optimal image adjustment. Variable density disks employ filters, which are complex, bulky, and require high drive power, resulting in discontinuous dimming and significant delays. Electronic shutters offer fast response but are inadequate for applications with large apertures. Therefore, this application addresses improvements to mechanical adjustment mechanisms, enabling stable adjustment of the aperture while reducing overall size and simplifying the adjustment structure. This approach allows for application in a variety of scenarios, enhancing flexibility.

[0030] Regarding related technologies, such as Figure 1-Figure 3As shown, this embodiment provides a variable aperture adjustment device, including a platform plate 10, a connecting plate 30, a clamping plate 20, a position adjustment assembly 40 and an aperture assembly 70; the connecting plate 30 is arranged on one side of the platform plate 10 and is slidably connected to the platform plate 10 in the horizontal direction, and a first transmission part 50 is connected to the connecting plate 30; the outer wall of the connecting plate 30 is provided with an aperture assembly 70, and the aperture assembly 70 is connected to the connecting plate 30 through a distance adjustment mechanism 60, and the distance adjustment mechanism 60 is used to adjust the aperture assembly 70 close to or away from the platform plate 10; the clamping plate 20 is arranged on the other side of the platform plate 10 and is slidably connected to the platform plate 10 in the vertical direction, and a second transmission part is provided on the clamping plate 20; the position adjustment assembly 40 is arranged on the platform plate 10, and the first transmission part 50 and the second transmission part are both transmission-connected to the position adjustment assembly 40; so as to drive the connecting plate 30 to move in the horizontal direction and / or vertical direction relative to the clamping plate 20. The aperture assembly 70 is used to adjust the size of the clear aperture to achieve light intensity control. During use, the aperture assembly 70 must be coordinated with an adjustment assembly to adjust its position, enabling precise positioning of the aperture in three-dimensional space, thereby optimizing the characteristics and direction of the light beam. In this embodiment, the aperture assembly 70 is mounted on the connecting plate 30. The connecting plate 30 and the clamping plate 20 are movable in the horizontal (i.e., X-direction) and vertical (i.e., Y-direction) directions, respectively. The distance adjustment mechanism 60 drives the aperture assembly 70 in the fore-aft (i.e., Z-direction) direction, thereby achieving three-dimensional adjustment and positioning of the aperture. The overall adjustment structure is simple and provides stable adjustment.

[0031] Specifically, the connecting plate 30 slides with the platform plate 10 and can move in the X direction, driving the aperture assembly 70 in the X direction. The clamping plate 20 is vertically connected to the platform plate 10, allowing the platform plate 10 and the connecting plate 30 to slide together in the Y direction. The position adjustment assembly 40 is connected to the two transmission parts, thereby achieving actuation in the X and Y directions. During actuation, the clamping plate 20 can move relative to the platform plate 10 in the Y direction, and the connecting plate 30 can move relative to the platform plate 10 in the X direction. Specifically, when connected to an external device or apparatus, the clamping plate 20 serves as a connector, that is, the clamping plate 20 is fixed to the external device or apparatus, so that the clamping plate 20 is used as a reference when moving, thereby moving the aperture assembly 70 to the target position.

[0032] In the specific setting, the connecting plate 30, the aperture assembly 70 and the distance adjustment mechanism 60 are arranged on one side of the platform plate 10, and the clamping plate 20 and the position adjustment assembly 40 are arranged on the other side of the platform plate 10, so that it is more convenient to adjust through the position adjustment assembly 40, and by setting it on two sides, it can be beneficial to the overall structural layout, making the overall structure more compact.

[0033] It can be understood that the X direction, Y direction and Z direction in this embodiment are three directions perpendicular to each other in the space coordinate system, so that they can be adapted to any position in the imaging of the optical system, thereby improving the flexibility of adjusting the aperture assembly 70.

[0034] In some implementations, such as Figure 2 As shown, Figure 2 The figure shows a combined cross-sectional view of the position adjustment assembly 40 and a cross-sectional view of the entire assembly. The position adjustment assembly 40 includes an adjustment seat 41 and a knob mechanism. The adjustment seat 41 is fixedly mounted on the platform plate 10, and the knob mechanism is rotatably mounted on the adjustment seat 41. The knob mechanism includes a first knob portion 43 and a second knob portion 44. The first knob portion 43 is connected to the first transmission portion 50 via a wire rope 511 transmission system to drive the connecting plate 30 to move horizontally relative to the clamping plate 20. The second knob portion 44 is connected to the second transmission portion via a rack and pinion transmission system to drive both the platform plate 10 and the connecting plate 30 to move vertically relative to the clamping plate 20. During adjustment, the position adjustment assembly 40 needs to move the aperture assembly 70 in the X or Y direction. In this embodiment, this is achieved by rotating the knob portion, and the conversion and transmission of motion are achieved through the wire rope 511 transmission system and the rack and pinion transmission system. This approach simplifies the position adjustment assembly 40, making adjustment easier and faster.

[0035] It is understandable that the use of a rack and pinion transmission system and a wire rope 511 transmission system can improve the stability of the transmission, making the transmission more stable and reliable.

[0036] Specifically, the knob part rotates by turning the knob, and the wire rope 511 transmission system and the gear rack transmission system can convert the rotational motion into linear motion, thereby driving the splint 20 and the connecting plate 30 to move relative to the platform plate 10, which can facilitate rapid adjustment.

[0037] In some embodiments, the knob mechanism further includes a core shaft 42, one end of which is connected to a rotating wheel 45, around which a wire rope 511 is wound. The other end of the core shaft 42 is connected to the first knob portion 43. A sleeve 46 is sleeved on the outside of the core shaft 42, which is covered with outer shaft teeth 47. One end of the outer shaft teeth 47 is connected to the second knob portion 44, and the other end of the outer shaft teeth 47 is provided with a transmission gear. In this embodiment, by arranging the two knob portions on the same core shaft 42, the overall structure is made more compact, facilitating adjustment in the X and Y directions.

[0038] Specifically, the rotating wheel 45 and the wire rope 511 form a wire rope 511 transmission system, thereby achieving movement in the X direction. That is, turning the first knob 43 drives the rotating wheel 45 to rotate, which in turn drives the wound wire rope 511 to move, thereby achieving movement in the X direction. The core shaft 42 and the outer shaft teeth 47 are isolated by the sleeve 46, so that the rotation of the core shaft 42 and the outer shaft teeth 47 do not affect each other, thereby achieving independent movement in the X and Y directions. The transmission gear at one end of the outer shaft teeth 47 forms a rack and pinion transmission system. That is, when the second knob 44 is rotated, it drives the transmission gear to rotate, thereby driving the meshing rack to move in the vertical direction (Y direction).

[0039] It is understood that the overall arrangement of a single core shaft 42 and two knobs enables drive in both the X and Y directions, significantly reducing the space occupied by the position adjustment assembly 40 and making the overall structure more compact. Furthermore, by locating the adjustment knobs for both directions in the same position, switching between them is facilitated, which facilitates quick switching of movement directions.

[0040] Specifically, the outer sleeve shaft gear 47 comprises a hollow gear rod structure that fits over the shaft sleeve 46. A ring of teeth is provided on the outer surface of the gear rod. The ring teeth mesh with the rack gear for transmission. When the second knob portion 44 is rotated, the gear rod rotates, causing the ring teeth to move the rack gear, achieving movement in the Y direction. The ends of the first knob portion 43 and the second knob portion 44 are both locked with locking bolts to prevent the knob portions from loosening.

[0041] In a specific embodiment, the second transmission part includes a rack block 21, which is engaged with a transmission gear. In this embodiment, the transmission arrangement of the rack block 21 can improve the transmission stability, so that the platform plate 10 can move vertically relative to the clamping plate 20.

[0042] Specifically, a notch is provided on one side of the adjustment seat 41, and the rack block 21 is vertically arranged on one side of the splint 20 through a connecting piece. Part of the rack block 21 is located in the notch, and the ring tooth part of the outer shaft tooth 47 is also located in the notch and meshes with the rack block 21 to form a gear rack transmission system, thereby realizing stable transmission in the vertical direction.

[0043] According to some embodiments provided by the present invention, the first transmission part 50 includes a pulley 51 and a slider 52, a wire rope 511 is wound between the pulley 51 and the rotating wheel 45 to form a wire rope 511 transmission system, and the first transmission part 50 is connected to the wire rope 511; the platform plate 10 is provided with a guide rail portion 13 in the horizontal direction, the slider 52 is slidably connected to the guide rail portion 13, and the connecting plate 30 is connected to the slider 52. The pulley 51 and the rotating wheel 45 are traction-driven by the wire rope 511, so that when the rotating wheel 45 is driven to rotate, the wire rope 511 can be driven to move, and the slider 52 is connected to the wire rope 511, so that when the wire rope 511 moves, the slider 52 can be driven to slide along the guide rail portion 13, thereby realizing the driving of the connecting plate 30.

[0044] It is understandable that, in this embodiment, the slider 52 is slidably disposed on the platform plate 10 and is fixedly connected to the connecting plate 30 , so that the slider 52 can drive the connecting plate to move when moving, thereby ultimately achieving adjustment of the aperture assembly 70 in the X direction.

[0045] Specifically, a guide rail 13 and a receiving groove 14 are horizontally disposed on the upper portion of the platform plate 10. The receiving groove 14 is adjacent to the guide rail 13. The wire pulley 51 and the rotating wheel 45 are located at both ends of the receiving groove 14. The wire rope 511 is located within the receiving groove 14. The slider 52 is slidably connected to the guide rail 13. A portion of the slider 52 is located within the receiving groove 14 and connected to the wire rope 511, thereby driving the slider 52 to move when the rotating wheel 45 rotates. This method of transmission is more stable and takes up less space.

[0046] In some embodiments, the platform 10 is provided with a vertical chute 11 along the vertical direction; steel ball isolators 22 are provided on two opposite sides of the vertical chute 11, and the clamping plate 20 slides within the vertical chute 11 and contacts the steel ball isolators 22. The clamping plate 20 slides along the vertical chute 11 in the Y direction. In this embodiment, the provision of the steel ball isolators 22 can reduce friction during the sliding process, making the sliding process smoother.

[0047] Specifically, the steel ball separator 22 can adopt a conventional separator structure. Specifically, it includes a steel bar with a plurality of holes spaced apart on the steel bar. The steel balls are placed in the holes to form the steel ball separator 22. When connected, the steel bar is connected to the side walls of the vertical chute 11, so that the clamping plate 20 and the steel balls contact and slide. This can reduce friction during the sliding process, improve the smoothness of the sliding process, and reduce sliding wear of the clamping plate 20.

[0048] In some embodiments, a strip-shaped hole is provided on the platform plate 10 on one side of the vertical slide 11; a connecting block 23 is provided on the side of the clamping plate 20 near the strip-shaped hole, and a vernier module is installed on the connecting block 23. The combination of the vernier module and the strip-shaped hole enables measurement of vertical displacement to achieve precise movement.

[0049] Specifically, a scale may be provided on the outer edge of the strip-shaped hole, and the scale corresponds to the vernier module, so that the displacement of the movement can be accurately measured, thereby enabling precise adjustment.

[0050] According to some embodiments provided by the present invention, the distance adjustment mechanism 60 includes a connecting seat 61, a fine adjustment seat 62, and a coarse adjustment seat 63. One end of the connecting seat 61 is connected to the aperture assembly 70, and the other end of the connecting seat 61 is threadedly connected to the fine adjustment seat 62. The fine adjustment seat 62 is sleeved on the outside of the coarse adjustment seat 63, and the coarse adjustment seat 63 is connected to the connecting plate 30. The aperture assembly 70 is self-adjusted by the distance adjustment mechanism 60 when moving in the Z direction. Specifically, the arrangement of the fine adjustment seat 62 and the coarse adjustment seat 63 enables adjustment of the aperture assembly 70 in the Z direction, improving the stability and accuracy of its adjustment.

[0051] Specifically, both the fine-adjustment seat 62 and the coarse-adjustment seat 63 are tubular structures. One end of the coarse-adjustment seat 63 is connected to the connecting plate 30, while the other end of the coarse-adjustment seat 63 extends freely. The fine-adjustment seat 62 is sleeved on the outside of the coarse-adjustment seat 63, allowing the fine-adjustment seat 62 to move axially along the coarse-adjustment seat, thereby achieving rapid adjustment in the Z direction. When fine adjustment is required, the fine-adjustment seat 62 is rotated to move the connecting seat 61 closer to or away from the fine-adjustment seat 41, thereby achieving fine adjustment in the Z direction. The coordinated arrangement of coarse and fine adjustment can improve the efficiency and accuracy of adjustment.

[0052] It is understandable that quick adjustment can be achieved by directly sliding the fine-tuning seat 41 , while fine adjustment can be achieved by rotating the fine-tuning seat 41 , thereby achieving more accurate distance adjustment.

[0053] In some embodiments, a locking screw 64 is provided on the fine-tuning seat 62, which is used to tighten or loosen the fine-tuning seat 62. When making adjustments, the fine-tuning seat 62 needs to be moved or rotated, and stable support is required after the adjustment is completed. In this embodiment, the provision of the locking screw 64 can achieve the tightening or loosening of the fine-tuning seat 62, thereby maintaining the stability of the fine-tuning seat 62 and providing an adjustment function when adjustment is required.

[0054] In the specific setting, a bolt hole is provided in the radial direction of the fine adjustment seat 62, and a locking screw is threadedly connected to the bolt hole, and locking or loosening is achieved by correspondingly abutting or disengaging with the internal coarse adjustment seat 63.

[0055] It can be understood that in this embodiment, the aperture assembly 70 is threadedly connected to the fine-tuning seat 62 through the connecting seat 61. On the one hand, precise distance adjustment can be achieved, and on the other hand, the aperture assembly 70 can be quickly disassembled and replaced through the threaded connection, which is convenient and labor-saving, and can be replaced with different ranges of aperture assemblies 70 according to usage requirements.

[0056] According to some embodiments provided by the present utility model, Figure 4 As shown, the aperture assembly 70 includes an aperture seat 71 and an aperture cover 72. The aperture cover 72 is connected to the aperture seat 71. The aperture cover 72 is provided with a first annular groove 721 for mounting a frosted glass, and a second annular groove 722 for mounting a color filter. The aperture seat 71 is provided with a blade adjustment assembly 711 and a dial 712. The blade adjustment assembly 711 is disposed within the aperture seat 71. The dial 712 is rotatably disposed outside the aperture seat 71. The dial 712 is used to adjust the blade adjustment assembly 711 to adjust the aperture of the light passing through. In this embodiment, by providing two annular grooves within the aperture cover 72, frosted glass and color filters can be disposed within the aperture cover 72 to improve the light within the field of view.

[0057] The blade adjustment assembly 711 and dial 712 utilize a conventional aperture adjustment system. Specifically, they utilize multiple adjustable blades (e.g., circular, rectangular, or other shapes) or an aperture. These blades rotate about a central axis, and the dial drives the multiple blades to rotate along the central axis, thereby adjusting the aperture opening size. The specific structure can be readily derived by those skilled in the art through existing publicly available techniques, and will not be further described.

[0058] Specifically, a first annular groove 721 is provided near one end of the outside of the aperture cover 72. Frosted glass is installed in the first annular groove 721, and the frosted glass is fixed by a pressure ring 73. The pressure ring 73 can facilitate the quick replacement of the frosted glass to improve the uniformity of light in the field of view.

[0059] In the specific setting, a spring sleeve 723 is provided in the second annular groove 722, and the color filter can be positioned by the spring sleeve 723, that is, the spring sleeve 723 is used for positioning and adjustment, and the plug-in plate is pulled out to replace the color filter and then inserted again, so that different color filters can be replaced according to imaging needs, the wavelength of light can be controlled, and the positioning is accurate and the replacement is convenient.

[0060] In a specific application, a groove is formed on the annular wall of the second annular groove 722, and a spring and a steel ball are placed in the groove to form a spring sleeve 723. The diameter of the steel ball is slightly larger than the diameter of the groove opening, which allows a portion of the steel ball to be exposed. When installing the color filter, the color filter can be positioned by simply snapping it into place. In other words, the steel ball can abut against the color filter, thereby making the color filter more stable.

[0061] From the above description of the embodiments, those skilled in the art will clearly understand that this device boasts a compact and sophisticated design, making it easily adaptable to various optical systems, serving as aperture stops, vignetting stops, field stops, and stray light suppression stops. It modifies the aperture diameter and light angle, controlling light variations, improving imaging quality, and altering the resolution and depth of field of the optical system. Simulation analysis of the movement of the aperture components demonstrates aperture adjustment accuracy exceeding NA ± 0.005 mm. Furthermore, the structural layout, with the clamping plate 20 and connecting plate 30 positioned on either side of the platform plate 10, makes the overall structure more compact, enriching its assembly possibilities.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A variable aperture adjustment device, characterized in that: include: Platform board; a connecting plate, the connecting plate being disposed on one side of the platform plate and being slidably connected to the platform plate in a horizontal direction, and being connected to the connecting plate by a first transmission portion; an aperture assembly being disposed on an outer side wall of the connecting plate, the aperture assembly being connected to the connecting plate by a distance adjustment mechanism, the distance adjustment mechanism being used to adjust the aperture assembly to move closer to or further away from the platform plate; a clamping plate, the clamping plate being provided on the other side of the platform plate and being slidably connected to the platform plate in a vertical direction, the clamping plate being provided with a second transmission part; A position adjustment component is provided on the platform plate, and the first transmission part and the second transmission part are both in transmission connection with the position adjustment component; so as to drive the connecting plate to move in the horizontal direction and / or vertical direction relative to the clamping plate.

2. The variable aperture adjustment device according to claim 1, characterized in that: The position adjustment assembly includes an adjustment seat and a knob mechanism, wherein the adjustment seat is fixedly arranged on the platform plate, and the knob mechanism is rotatably arranged on the adjustment seat; The knob mechanism includes a first knob part and a second knob part. The first knob part is connected to the first transmission part through a wire rope transmission system to drive the connecting plate to move in the horizontal direction relative to the clamping plate; the second knob part is connected to the second transmission part through a gear rack transmission system to drive the platform plate and the connecting plate to move in the vertical direction relative to the clamping plate.

3. The variable aperture adjustment device according to claim 2, characterized in that: The knob mechanism further comprises a core shaft, one end of the core shaft is connected to a rotating wheel, a steel wire rope is wound around the rotating wheel, and the other end of the core shaft is connected to the first knob portion; The outer sleeve of the core shaft is provided with a shaft sleeve, the outer sleeve is provided with an outer sleeve shaft tooth, one end of the outer sleeve shaft tooth is connected to the second knob part, and the other end of the outer sleeve shaft tooth is provided with a transmission gear.

4. The variable aperture adjustment device according to claim 3, characterized in that: The second transmission part includes a rack block, and the rack block is meshed with the transmission gear for transmission.

5. The variable aperture adjustment device according to claim 3, characterized in that: The first transmission part includes a wire wheel and a slider, the wire rope is wound between the wire wheel and the rotating wheel to form the wire rope transmission system, and the first transmission part is connected to the wire rope; The platform plate is provided with a guide rail portion along a horizontal direction, the slider is slidably connected to the guide rail portion, and the connecting plate is connected to the slider.

6. The variable aperture adjustment device according to claim 5, characterized in that: The platform plate is provided with a vertical slide groove along the vertical direction; steel ball isolators are provided on two opposite sides of the vertical slide groove, and the clamping plate is slidably arranged in the vertical slide groove and contacts the steel ball isolators.

7. The variable aperture adjustment device according to claim 6, characterized in that: A strip hole is provided on the platform plate at one side of the vertical slide groove; a connecting block is provided on one side of the clamping plate close to the strip hole, and a cursor module is provided on the connecting block.

8. The variable aperture adjustment device according to claim 1, characterized in that: The distance adjustment mechanism includes a connecting seat, a fine adjustment seat and a coarse adjustment seat. One end of the connecting seat is connected to the aperture assembly, and the other end of the connecting seat is threadedly connected to the fine adjustment seat. The fine adjustment seat is sleeved on the outside of the coarse adjustment seat, and the coarse adjustment seat is connected to the connecting plate.

9. The variable aperture adjustment device according to claim 8, characterized in that: The fine-tuning seat is provided with a locking screw, and the locking screw is used to lock or loosen the fine-tuning seat.

10. The variable aperture adjustment device according to claim 1, characterized in that: The aperture assembly includes an aperture seat and an aperture cover, wherein the aperture cover is connected to the aperture seat and is provided with a first annular groove for mounting a frosted glass and a second annular groove for mounting a color filter; The aperture seat is provided with a blade adjustment assembly and a dial. The blade adjustment assembly is arranged inside the aperture seat, and the dial is rotatably arranged outside the aperture seat. The dial is used to adjust the blade adjustment assembly to adjust the aperture of the light passing through.

Images