Pyramid light barrier switching device
By using a stepper motor to drive the light-blocking plate assembly to make local swings, the problem of large size and inaccurate positioning caused by the large stroke of the corner cube prism translation mechanism in optical equipment is solved, realizing the miniaturization of optical equipment and high-precision optical axis calibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BLUE STAR OPTICAL (SHANGHAI) AEROSPACE TECH CO LTD
- Filing Date
- 2025-10-30
- Publication Date
- 2026-07-24
AI Technical Summary
The translation mechanism of the corner cube prism in existing optical equipment has a large stroke, resulting in a large equipment size and inaccurate positioning, which affects the optical axis calibration effect.
A stepper motor is used to drive the light-blocking plate assembly to swing locally. The light path is cut off by the rotating light-blocking plate assembly, which replaces the large-stroke translation of the corner cube prism. Combined with high-precision control and bearing design, positioning accuracy and device stability are ensured.
It reduces the space required for optical path cutoff, enables miniaturization of optical equipment and high-precision optical axis calibration, reduces the risk of mechanical failure, and extends service life.
Smart Images
Figure CN224553586U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical axis calibration technology, and in particular relates to a corner cone light-blocking plate switching device. Background Technology
[0002] Because optical equipment is subject to external factors such as vibration and impact during movement, the relative positions of its internal optical lenses may shift, causing slight changes in the coaxiality of the receiving and transmitting optical paths, thus affecting tracking performance. Therefore, corner cube prisms are now incorporated into optical equipment to achieve optical axis calibration.
[0003] Currently, the corner cube prism is added by mounting it on a translation mechanism. When optical axis calibration is needed, the translation mechanism moves the corner cube prism to the calibration position; when calibration is not needed, the mechanism moves it out of the optical path. However, this method requires the entire corner cube prism to be moved in or out, resulting in a large travel distance for the translation mechanism and a larger overall size for the optical equipment. Furthermore, the corner cube prism's positioning is inaccurate each time it returns to the calibration position, thus affecting the optical axis calibration effect. Utility Model Content
[0004] This invention provides a corner bevel light-blocking plate switching device, which can solve the problems in the prior art where the entire translation mechanism requires a large stroke, resulting in a large volume of the entire optical equipment, and the corner bevel prism is not accurately positioned each time it returns to the corner bevel calibration position, thus affecting the optical axis calibration effect.
[0005] This utility model provides a corner cone light-blocking plate switching device, including a stepper motor, a corner cone prism, a light-blocking plate assembly, and a light-blocking plate rotation assembly; The corner bevel prism is fixedly connected to the housing of the stepper motor; The light-blocking plate rotating assembly is movably connected to the light-blocking plate assembly and fixedly connected to the output shaft of the stepper motor, and is used to drive the light-blocking plate assembly to rotate on the housing of the stepper motor under the drive of the stepper motor; the light-blocking plate assembly can cut off the incident light path of the corner cube prism during rotation.
[0006] Optionally, the light-blocking plate assembly includes a light-blocking plate, a light-blocking plate mounting base, and a first connecting shaft; The light-blocking plate is fixedly connected to the light-blocking plate mounting base; The two ends of the first connecting shaft are respectively rotatably connected to the housing of the stepper motor and the light-blocking plate mounting base; The light-blocking plate mounting base is movably connected to the light-blocking plate rotating assembly.
[0007] Optionally, the light-blocking plate has a plurality of closely arranged strip-shaped triangular grooves on the side away from the corner prism.
[0008] Optionally, the light-blocking plate rotating assembly includes a crank and a second connecting shaft; The light-blocking plate mounting base has an oblong hole; the length direction of the oblong hole is perpendicular to the axial direction of the output shaft of the stepper motor; The second connecting shaft is slidably connected to the waist-shaped hole and rotatably connected to the crank; The end of the crank away from the second connecting shaft is fixedly connected to the output shaft of the stepper motor.
[0009] Optionally, the corner bevel prism is fixedly connected to the housing of the stepper motor via a corner bevel mounting base.
[0010] Optionally, the cone light-blocking plate switching device provided by this utility model also includes a motor mounting base; The motor mounting base is fixedly connected to the stepper motor and the corner prism; the light-blocking plate rotating assembly is used to drive the light-blocking plate assembly to rotate on the motor mounting base under the drive of the stepper motor.
[0011] Optionally, the two ends of the first connecting shaft are rotatably connected to the motor mounting base and the light-blocking plate mounting base, respectively.
[0012] Optionally, the cornerstone prism is fixedly connected to the motor mounting base via a cornerstone mounting bracket.
[0013] Optionally, the inner ring of the first bearing is fixedly connected to the end of the first connecting shaft away from the stepper motor; the outer ring of the first bearing is fixedly connected to the light-blocking plate mounting base.
[0014] Optionally, the inner ring of the second bearing is fixedly connected to the side of the second connecting shaft; the outer ring of the second bearing is slidably connected to the inner wall of the waist-shaped hole.
[0015] This utility model provides a corner bevel light-blocking plate switching device, which drives the light-blocking plate rotation assembly through a stepper motor, causing the light-blocking plate assembly to rotate in the incident light path of the corner bevel prism, thereby achieving the interruption of the light path by only partially swinging the light-blocking plate, thus replacing the traditional method that requires driving the entire corner bevel prism to perform a large-stroke translation.
[0016] The rotation range of the light-blocking plate assembly is smaller than the overall translational stroke of the corner cube prism, thus greatly reducing the space required to perform the optical path blocking function, which is beneficial to the miniaturization and integration of optical equipment.
[0017] By utilizing the high-precision angle control capability of stepper motors, combined with a light-blocking plate rotation assembly (such as the fit between a crank and a waist-shaped hole), the rotational motion of the motor is converted into precise and repeatable oscillation of the light-blocking plate. This design ensures extremely high repeatability in positioning when the light-blocking plate enters and exits the optical path, overcoming the positioning error caused by repeated translation of the corner cube prism and guaranteeing the accuracy of optical axis calibration.
[0018] By setting bearings (such as the first bearing and the second bearing), friction and wear between moving parts are effectively reduced, making the entire switching device operate more smoothly and steadily, extending its service life, and reducing the risk of failure due to mechanical jamming. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of a cone-shaped light-blocking plate switching device provided in an embodiment of this utility model; Figure 2 An exploded view of the structure of a pyramidal light-blocking plate switching device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the triangular groove on the light-blocking plate reflecting incident light, provided in an embodiment of the present invention.
[0021] Among them, 1. Stepper motor; 2. Pyramidal prism; 3. Light-blocking plate assembly, 31. Light-blocking plate, 311. Triangular groove, 32. Light-blocking plate mounting base, 321. Waist-shaped hole, 33. First connecting shaft, 331. First bearing; 4. Light-blocking plate rotating assembly, 41. Crank, 42. Second connecting shaft, 421. Second bearing; 5. Pyramidal mounting base; 6. Motor mounting base. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] This embodiment provides a cone-shaped light-blocking plate switching device, such as... Figure 1 As shown, it includes a stepper motor 1, a corner pyramid prism 2, a light-blocking plate assembly 3, and a light-blocking plate rotating assembly 4.
[0024] The corner cube prism 2 is fixedly connected to the housing of the stepper motor 1 via the corner cube mounting base 5; the light-blocking plate assembly 3 is rotatably connected to the housing of the stepper motor 1; the light-blocking plate assembly 3 can cut off the incident light path of the corner cube prism 2 during rotation. It should be noted that in this embodiment, "rotatable connection" indicates capability, that is, the ability to be rotatably connected.
[0025] The light-blocking plate rotating assembly 4 is movably connected to the light-blocking plate assembly 3 and fixedly connected to the output shaft of the stepper motor 1. It is used to drive the light-blocking plate assembly 3 to rotate on the housing of the stepper motor 1 under the drive of the stepper motor 1. During the rotation, the light-blocking plate assembly 3 can cut off the incident light path of the corner prism 2.
[0026] like Figure 2 As shown, the light-blocking plate assembly 3 includes a light-blocking plate 31, a light-blocking plate mounting base 32, and a first connecting shaft 33; the light-blocking plate 31 (including but not limited to being fixedly connected to the light-blocking plate mounting base 32 by bolts) is fixedly connected to the light-blocking plate mounting base 32.
[0027] The two ends of the first connecting shaft 33 are rotatably connected to the housing of the stepper motor 1 and the light-blocking plate mounting base 32, respectively. If the rotation of one end of the first connecting shaft 33 is stuck, it will not affect the rotation of the light-blocking plate 31 and the light-blocking plate mounting base 32. The light-blocking plate mounting base 32 is movably connected to the light-blocking plate rotating assembly 4.
[0028] The rotation range of the light-blocking plate assembly 3 is less than the overall translational stroke of the corner cube prism 2, thus greatly reducing the space required to perform the optical path blocking function, which is beneficial to the miniaturization and integration of optical equipment.
[0029] Because the coating of the mirror in an optical device cannot achieve 100% reflection, some light will pass through. This unprocessed light will affect the imaging of the optical system, resulting in unclear images and reduced resolution. Therefore, the side of the light-blocking plate 31 away from the corner cube prism 2 is provided with multiple closely arranged strip-shaped triangular grooves 311; these grooves have a sawtooth structure, such as... Figure 3 As shown, when light is incident on the light-blocking plate 31, it will undergo diffuse reflection and absorption on the triangular groove 311, and the light will not return along the same path due to the sawtooth structure.
[0030] like Figure 2 As shown, the light-blocking plate rotating assembly 4 includes a crank 41 and a second connecting shaft 42.
[0031] The light-blocking plate mounting base 32 has an oblong hole 321; the length direction of the oblong hole 321 is perpendicular to the axial direction of the output shaft of the stepper motor 1, and the length of the oblong hole 321 is such that the light-blocking plate 31 completely blocks the incident light path of the corner prism 2 and does not block the incident light path of the corner prism 2; the second connecting shaft 42 is slidably connected to the oblong hole 321 and rotatably connected to the crank 41; the end of the crank 41 away from the second connecting shaft 42 is fixedly connected to the output shaft of the stepper motor 1.
[0032] like Figure 1 and Figure 2 As shown, exemplarily, the incident light path of the corner cube prism 2 is parallel to the axial direction of the output shaft of the stepper motor 1, and the rotation (oscillation) direction of the light-blocking plate 31 is perpendicular to the axial direction of the output shaft of the stepper motor 1. In the prior art, the stepper motor 1 is electrically connected to a host computer, which can realize the host computer's control of the forward or reverse rotation of the stepper motor 1.
[0033] like Figure 1 As shown, the light-blocking plate 31 completely blocks the incident light path of the corner cube prism 2. At this time, the second connecting shaft 42 is located at the end of the waist-shaped hole 321 away from the first connecting shaft 33, and the second connecting shaft 42 cannot continue to move away from the first connecting shaft 33. If it is necessary to rotate the light-blocking plate 31 out of the incident light path of the corner cube prism 2, the stepper motor 1 needs to drive the second connecting shaft 42 to move towards the first connecting shaft 33. While the second connecting shaft 42 moves towards the first connecting shaft 33, the light-blocking plate mounting base 32 rotates, thereby causing the light-blocking plate 31 to deflect until it is removed from the incident light path of the corner cube prism 2.
[0034] By utilizing the high-precision angle control capability of the stepper motor 1, and combining it with the light-blocking plate rotation assembly 4 (such as the engagement of crank 41 and oblong hole 321), the rotational motion of the stepper motor 1 is converted into precise and repeatable oscillation of the light-blocking plate 31. This design ensures that the light-blocking plate 31 has extremely high repeatability in positioning when entering and exiting the optical path, overcomes the positioning error caused by repeated translation of the corner cube prism 2, and guarantees the accuracy of optical axis calibration.
[0035] For example, such as Figure 1 and Figure 2 As shown, the cone-shaped light-blocking plate switching device provided in this embodiment also includes a motor mounting base 6. This can be understood as the motor mounting base 6 being part of the stepper motor 1 housing, facilitating the disassembly and replacement of the stepper motor 1.
[0036] Therefore, the motor mounting base 6 is fixedly connected to the stepper motor 1 and the corner pyramid prism 2; the light-blocking plate rotating assembly 4 is used to drive the light-blocking plate assembly 3 to rotate on the motor mounting base 6 under the drive of the stepper motor 1.
[0037] The two ends of the first connecting shaft 33 are rotatably connected to the motor mounting base 6 and the light-blocking plate mounting base 32, respectively.
[0038] The corner cube prism 2 is fixedly connected to the motor mounting base 6 via the corner cube mounting base 5.
[0039] For example, such as Figure 2 As shown, the first connecting shaft 33 is a stepped shaft, and the inner ring of the first bearing 331 is fixedly connected to the end of the first connecting shaft 33 away from the stepper motor 1; the outer ring of the first bearing 331 is fixedly connected to the light-blocking plate mounting seat 32.
[0040] The inner ring of the first bearing 331 is provided with an inner bearing pressure ring, and the outer ring of the first bearing 331 is provided with an outer bearing pressure ring to prevent axial displacement of the first bearing 331 during operation.
[0041] The inner ring of the second bearing 421 is fixedly connected to the side of the second connecting shaft 42; the outer ring of the second bearing 421 is slidably connected to the inner wall of the waist-shaped hole 321.
[0042] Similarly, to prevent axial displacement during the operation of the second bearing 421, an inner bearing pressure ring is provided on the inner ring of the second bearing 421, and an outer bearing pressure ring is provided on the outer ring of the second bearing 421.
[0043] The arrangement of the first bearing 331 and the second bearing 421 effectively reduces friction and wear between moving parts, making the entire switching device operate more smoothly and steadily, extending its service life, and reducing the risk of failure due to mechanical jamming.
[0044] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and implementation methods of the present invention without departing from the spirit and scope of the present invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.
Claims
1. A cone-shaped light-blocking plate switching device, characterized in that, It includes a stepper motor (1), a corner pyramid prism (2), a light-blocking plate assembly (3), and a light-blocking plate rotating assembly (4); The corner cube prism (2) is fixedly connected to the housing of the stepper motor (1); The light-blocking plate rotating assembly (4) is movably connected to the light-blocking plate assembly (3) and fixedly connected to the output shaft of the stepper motor (1), and is used to drive the light-blocking plate assembly (3) to rotate on the housing of the stepper motor (1) under the drive of the stepper motor (1); the light-blocking plate assembly (3) can cut off the incident light path of the corner pyramid prism (2) during the rotation process.
2. The cone-shaped light-blocking plate switching device according to claim 1, characterized in that, The light-blocking plate assembly (3) includes a light-blocking plate (31), a light-blocking plate mounting base (32), and a first connecting shaft (33). The light-blocking plate (31) is fixedly connected to the light-blocking plate mounting base (32); The two ends of the first connecting shaft (33) are respectively rotatably connected to the housing of the stepper motor (1) and the light-blocking plate mounting base (32); The light-blocking plate mounting base (32) is movably connected to the light-blocking plate rotating assembly (4).
3. The cone-shaped light-blocking plate switching device according to claim 2, characterized in that, The light-blocking plate (31) has a plurality of closely arranged strip-shaped triangular grooves (311) on the side away from the corner prism (2).
4. The cone-shaped light-blocking plate switching device according to claim 2, characterized in that, The light-blocking plate rotating assembly (4) includes a crank (41) and a second connecting shaft (42); The light-blocking plate mounting base (32) has an oblong hole (321); the length direction of the oblong hole (321) is perpendicular to the axial direction of the output shaft of the stepper motor (1); The second connecting shaft (42) is slidably connected to the waist-shaped hole (321) and rotatably connected to the crank (41); The output shaft of the stepper motor (1) is fixedly connected to one end of the crank (41) away from the second connecting shaft (42).
5. The cone-shaped light-blocking plate switching device according to claim 1, characterized in that, The corner prism (2) is fixedly connected to the housing of the stepper motor (1) via the corner prism mounting base (5).
6. The cone-shaped light-blocking plate switching device according to claim 2, characterized in that, It also includes a motor mounting bracket (6); The motor mounting base (6) is fixedly connected to the stepper motor (1) and the corner prism (2); the light-blocking plate rotating assembly (4) is used to drive the light-blocking plate assembly (3) to rotate on the motor mounting base (6) under the drive of the stepper motor (1).
7. The cone-shaped light-blocking plate switching device according to claim 6, characterized in that, The two ends of the first connecting shaft (33) are rotatably connected to the motor mounting base (6) and the light-blocking plate mounting base (32), respectively.
8. The cone-shaped light-blocking plate switching device according to claim 6, characterized in that, The corner prism (2) is fixedly connected to the motor mounting base (6) via the corner prism mounting base (5).
9. The cone-shaped light-blocking plate switching device according to claim 2, characterized in that, The inner ring of the first bearing (331) is fixedly connected to the end of the first connecting shaft (33) away from the stepper motor (1); the outer ring of the first bearing (331) is fixedly connected to the light-blocking plate mounting seat (32).
10. The cone-shaped light-blocking plate switching device according to claim 4, characterized in that, The inner ring of the second bearing (421) is fixedly connected to the side of the second connecting shaft (42); the outer ring of the second bearing (421) is slidably connected to the inner wall of the waist-shaped hole (321).