Five-dimensional attitude position adjusting device for optical element in optical system

Abstract

The invention discloses a five-dimensional posture adjusting device for an internal optical element of an optical system. The five-dimensional posture adjusting device mainly comprises a base, a Y-direction moving plate, an X-direction moving plate, mirror bracket supporting legs, an adjusting assembly mounting plate, a mirror frame assembly, a micrometer knob and a pitching deflection adjusting assembly. According to the device, the bolts are matched with the waist-shaped holes, and the detachable and reusable micrometer knob is adopted to realize X / Y direction translation adjustment, and a high-cost fixed linear guide rail, tension spring and micrometer knob structure is replaced, so that the production cost is greatly reduced; a tension spring pre-tightening mechanism is replaced by a thread pair self-locking structure, so that the problem of pre-tightening force attenuation in a vibration or temperature change environment is avoided; according to the device, the design of combining modular thread adjustment and mechanical limiting is adopted, the dependence on machining precision is reduced, the stability in a vibration environment is improved through a self-locking structure and selectable bonding fixation, and therefore the maintenance frequency of an optical path system is reduced.

Description

Technical Field

[0001] This invention belongs to the field of precision assembly and adjustment technology of optical instruments, specifically relating to a device for multi-degree-of-freedom precision adjustment of optical components (especially large-aperture standard mirrors) inside an optical system, which can realize precise adjustment and reliable fixation of optical components in X / Y / Z three-axis translation and pitch / yaw angles. Background Technology

[0002] In optical equipment, the installation and adjustment of optical components are crucial for ensuring system performance. During installation, optical components require precise position and orientation adjustments to achieve long-term stable and reliable fixation, minimizing maintenance needs. Once placed within the optical system, the limitations of the optical path necessitate meticulous position and orientation adjustments to optimize their operation, thereby guaranteeing the best performance of the entire optical system.

[0003] In existing technologies, the orientation adjustment of optical components generally adopts a structure of tension spring preload combined with linear guide rail and micrometer knob. This approach has significant limitations: First, it requires the long-term retention of high-cost precision components such as linear guide rail and micrometer knob, resulting in a high overall cost of the device; second, the tension spring structure is prone to stress relaxation and aging under vibration or temperature change environments, causing preload to decrease and thus affecting positioning accuracy; more importantly, when the linear guide rail is subjected to overturning moment, its slider raceway is prone to plastic deformation. This irreversible damage will seriously affect the long-term accuracy and reliability of the adjustment mechanism.

[0004] To address the aforementioned issues, this invention primarily employs a bolt-and-groove combination with a micrometer knob for X / Y translation adjustment, replacing the costly fixed linear guide, tension spring, and micrometer knob structure, thus significantly reducing production costs. Simultaneously, a self-locking threaded structure replaces the tension spring preload mechanism, preventing preload attenuation under vibration or temperature variations. Furthermore, the device combines modular threaded adjustment with mechanical limiting, reducing reliance on machining precision. The self-locking structure and optional adhesive fastening enhance stability under vibration, thereby reducing the frequency of maintenance for the optical path system. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a five-dimensional attitude position adjustment device for optical elements within an optical system.

[0006] The objective of this invention is achieved through the following technical methods: A five-dimensional attitude position adjustment device for optical elements within an optical system, characterized in that it includes: The base has a first set of threaded holes and a first temporary mounting hole for mounting the first micrometer knob. The Y-axis movable plate is connected to the base via a first bolt assembly. The first bolt assembly passes through a Y-axis oblong hole on the Y-axis movable plate and is screwed into the first set of threaded holes in the base, so that the Y-axis movable plate can move along the direction defined by the Y-axis oblong hole and be locked. The X-axis movable plate is connected to the Y-axis movable plate by a second bolt assembly. The second bolt assembly passes through the X-axis oblong hole provided on the X-axis movable plate and is screwed into the second set of threaded holes provided on the Y-axis movable plate, so that the X-axis movable plate can move along the direction defined by the X-axis oblong hole and be locked. The frame support legs and adjustment assembly mounting plate are fixedly installed on the upper surface of the X-direction moving plate; The frame assembly is supported at its bottom on the X-axis movable plate via a ball joint structure, enabling the frame assembly to pitch and yaw relative to the X-axis movable plate. At least one micrometer knob is selectively and temporarily mounted on a first temporary mounting hole in the base or a second temporary mounting hole in the Y-axis moving plate, for precisely driving the Y-axis moving plate or the X-axis moving plate to translate during the adjustment phase. A pitch and yaw adjustment component is mounted on the adjustment component mounting plate, and its output end is connected to the side or back of the frame component to drive and lock the pitch and yaw attitude of the frame component.

[0007] Furthermore, the frame assembly includes: The eyeglass frame has the aforementioned ball joint structure at its bottom; The frame is movably housed within the inner cavity of the frame; The Z-axis adjusting screw is screwed in from the bottom of the frame, and its top end acts on the bottom of the frame to drive the frame to move along the Z-axis. The top limiting and tightening screw is screwed in from the top of the frame, and its end can be inserted into the groove at the top of the frame to achieve axial limiting and auxiliary locking of the frame.

[0008] Furthermore, the ball joint structure includes a pad fixed to the bottom of the frame and a ball partially embedded in the ball socket at the bottom of the pad. The lower part of the ball contacts the upper surface of the X-direction moving plate to form a low-friction support point.

[0009] Furthermore, the pitch and yaw adjustment assembly includes: A hollow hexagonal screw, which is threadedly connected to the mounting plate of the adjustment assembly; The ball head bushing has a clearance fit between its cylindrical end and the connecting hole provided on the frame assembly; A ball socket washer is fitted onto the ball head end of the ball head bushing and accommodated in the end cavity of the external hexagonal hollow screw, so that the ball head of the ball head bushing and the ball socket of the ball socket washer form a spherical pair. The fixing and locking bolt passes through the external hexagonal hollow screw, the ball socket washer and the ball head bushing in sequence, and then connects to the threaded hole on the frame assembly.

[0010] Furthermore, the pitch and yaw adjustment components are in three sets, and are distributed on the adjustment component mounting plate in an inverted equilateral triangle layout, with one set located at the bottom center and the other two sets located on the top two sides.

[0011] Furthermore, the threaded pair between the external hexagonal hollow screw and the mounting plate of the adjustment assembly is a self-locking threaded pair, and its lead angle is smaller than the equivalent friction angle of the threaded pair.

[0012] Furthermore, a curing adhesive can be applied to the threaded engagement portion of the external hexagonal hollow screw and the mounting plate of the adjustment assembly to form additional axial restraint against vibration.

[0013] Furthermore, after the micrometer knob has been adjusted in the X or Y direction and the corresponding bolt assembly has been tightened, it can be removed from the base or Y-axis moving plate for reuse in other workstations.

[0014] Compared with the prior art, the present invention has the following significant features: 1) A "bolt-grooved hole" sliding pair is used to replace the high-cost fixed linear guide, and a detachable installation method for the micrometer knob is designed. This knob is only used as a temporary adjustment tool. After positioning is completed, it can be removed and reused in other workstations, which greatly reduces the material cost of a single device and realizes resource sharing of precision tools.

[0015] 2) The easily decaying tension spring preload mechanism has been completely eliminated, and a self-locking threaded pair (lead angle smaller than the equivalent friction angle) is used for adjustment and locking. Combined with the mechanical limit set screw in the frame assembly, a rigid, stress-free fixing method is formed, which fundamentally solves the problems of preload loss and position drift under vibration and temperature change environments.

[0016] 3) A modular design is adopted, decomposing complex functions into individual components. The ball joint formed by the ball socket gasket and the ball head bushing effectively eliminates stress concentration caused by machining and assembly errors. This design reduces the stringent requirements for the machining accuracy of individual parts, improves the overall process tolerance, and further enhances long-term stability through optional adhesive fixing.

[0017] 4) This invention provides an economical, reliable, and convenient optical element mounting and fine-tuning device, suitable for use in the optical path of compact optical equipment where maintenance is inconvenient after installation. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the rear structure of the five-dimensional attitude position adjustment device for optical elements in the optical system of the present invention. Figure 2 is a schematic diagram of the front structure of the five-dimensional attitude position adjustment device for optical elements in the optical system of the present invention; Figure 3 is a schematic diagram of the adjusting nut ball head assembly in this invention; Figure 4 is an exploded view of the adjusting nut ball head assembly in this invention; In the diagram: 1-base, 2-Y-axis moving plate, 3-X-axis moving plate, 4-frame support, 5-adjustment assembly mounting plate, 6-frame assembly, top limit set screw, Z-axis adjustment set screw, frame, pad, ball and frame, 7-micrometer knob, 8-pitch and yaw adjustment assembly; fixing locking bolt, hexagonal hollow bolt, ball socket washer, and ball head bushing. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not limit the scope of protection of the present invention.

[0020] Please see Figures 1-4 As shown in the figure, a five-dimensional attitude and position adjustment device for optical components within an optical system includes a base, a Y-axis moving plate, an X-axis moving plate, a frame support, an adjustment component mounting plate, a frame assembly, a micrometer knob, and a pitch and yaw adjustment assembly. The base has threaded holes for bolts engaging with the oblong holes on the Y-axis moving plate, holes for fixing to a base, and threaded holes for temporarily mounting the micrometer knob. The micrometer knob can be bolted to the base. The Y-axis moving plate has threaded holes for bolts engaging with the oblong holes on the X-axis moving plate, oblong holes for bolts engaging with the base, and threaded holes for temporarily mounting the micrometer knob. The micrometer knob can be bolted to the Y-axis moving plate. The X-axis moving plate has holes for fixing to the frame support and the adjustment component mounting plate, and oblong holes for bolts engaging with the Y-axis moving plate. The frame support has mounting holes for fixing to the X-axis moving plate and the adjustment component mounting plate. They are fixed together with bolts.

[0021] The adjustment assembly mounting plate has threaded holes for mounting the pitch and yaw adjustment components. They are secured together by threads.

[0022] The frame assembly includes a top limiting set screw, a Z-axis adjustment set screw, the frame, spacers, ball bearings, and the frame itself. The top limiting set screw secures the frame. The Z-axis adjustment set screw fine-tunes the frame height. The spacers reduce friction between the ball bearings and the frame. The ball bearings support the frame assembly without affecting its tilt and yaw functions. The frame houses the top limiting set screw, Z-axis adjustment set screw, frame, spacers, and ball bearings. The set screws and Z-axis adjustment set screws are connected to the frame via threaded connections. Holes for mounting the spacers are provided at the bottom of the frame, and these holes are interference-fitted. The spacers have recesses at their bottom; inserting the ball bearings into these recesses creates a ball joint, facilitating tilt and yaw adjustments on the X-axis. Adjusting the frame's upward movement in the Z-axis involves adjusting the set screws within the frame; the set screws push the frame vertically upward, thus achieving Z-axis adjustment. After adjustment, by adjusting the top limiting screw inside the frame, the top limiting screw will enter the groove at the top of the frame, thus preventing the frame from sliding out of the frame; continue to adjust the top limiting screw inside the frame until it is in full contact with the bottom of the groove at the top of the frame, thus fixing the frame inside the frame.

[0023] The temporary fixing holes on the side of the micrometer knob can be removed and reused after debugging, greatly reducing costs.

[0024] The pitch and yaw adjustment assembly, comprising a locking bolt, a hollow hexagonal screw, a ball-and-socket washer, and a ball-end bushing, is used for fine-tuning and securely fixing the attitude of optical components. The hollow hexagonal screw is threadedly connected to the adjustment assembly mounting plate. The cylindrical end of the ball-end bushing can be inserted into a hole in the lens frame assembly, with a clearance fit. The ball head of the ball-end bushing can be placed into the socket of the ball-and-socket washer, forming a ball joint. The locking bolt passes through the hollow hexagonal screw, the ball-and-socket washer, and the ball-end bushing, connecting to the threaded hole in the lens frame assembly, thus connecting the adjustment assembly mounting plate, the pitch and yaw adjustment assembly, and the lens frame assembly. The adjustment assembly mounting plate has three sets of pitch and yaw adjustment components, forming an inverted equilateral triangle. When adjusting the pitch, keeping the two sets of top pitch and yaw adjustment components stationary, the top position of the frame assembly remains unchanged. Adjusting the hollow hexagonal screws of the bottom pitch and yaw adjustment components pushes the bottom of the frame assembly forward, thus achieving a pitch posture because the top position of the frame assembly remains stationary. When adjusting the yaw, keeping the bottom set of bottom pitch and yaw adjustment components stationary, the vertical center line position of the frame assembly remains unchanged. Adjusting the hollow hexagonal screws of the two top sets of top pitch and yaw adjustment components pushes the left side of the frame assembly forward by adjusting the hollow hexagonal screw on the top left side inside the mounting plate. Adjusting the hollow hexagonal screw on the top right side outside the mounting plate pulls the right side of the frame assembly backward, thus achieving a rightward yaw posture because the vertical center line position of the frame assembly remains stationary. Similarly, by adjusting the hollow hexagonal screw on the top right side of the mounting plate, the right side of the lens frame assembly is moved forward; by adjusting the hollow hexagonal screw on the top left side of the mounting plate, the left side of the lens frame assembly is moved backward. Since the vertical centerline of the lens frame assembly remains stationary, the lens frame assembly achieves a leftward tilt. The pitch and yaw adjustment assembly uses a threaded self-locking structure to fix its position; the lead angle of the threaded pair is less than the equivalent friction angle, forming a reliable self-locking condition. Optionally, after completing the pitch and yaw adjustment, a curing adhesive can be applied to the threaded engagement portion of the pitch and yaw adjustment assembly to form additional axial constraint. This structural configuration effectively maintains the positional stability of the optical elements, significantly reduces the probability of misalignment of the optical path system under vibration conditions, thereby reducing the frequency of maintenance intervention.

[0025] The method of using this invention is as follows: First, install the frame assembly containing the optical elements in the required position in the optical path. Then, use the micrometer knob and height adjustment screws to adjust the position of the optical elements and secure them with the corresponding screws. At this point, loosen the locking bolts in the pitch and yaw adjustment assembly and adjust the pitch and yaw angle by adjusting the hexagonal hollow bolts. After completing the adjustment, retighten the locking bolts to complete all adjustments.

[0026] The base features fixed mounting holes for adjusting the Y-axis sliding plate and mounting positions for temporarily installing the micrometer knob. The knob's mounting position allows for easy removal and reuse of the adjustment tool, reducing costs. During adjustment, the knob can be slowly rotated to move the Y-axis sliding plate and its components laterally. Once the desired position is reached, the screw located in the slotted hole on the Y-axis sliding plate can be tightened to secure it. After securing, the micrometer knob can be removed from the base for reuse, further reducing equipment costs.

[0027] The Y-axis moving plate has mounting holes for the X-axis moving plate, oblong holes for fixing to the base, and mounting positions for a micrometer knob for temporary fine adjustment. After installing the micrometer knob onto the Y-axis moving plate, during adjustment, the micrometer knob can be slowly rotated to move the X-axis moving plate and its components laterally. Once the desired position is reached, the screw in the oblong hole on the X-axis moving plate can be tightened. After securing, the adjustment tool can be removed from the Y-axis moving plate for reuse.

[0028] The X-axis movable plate has fixing holes for the frame support legs and adjustment component mounting plate, and a waist-shaped hole for fixing to the Y-axis movable plate. It also has threaded holes for connection with the frame support legs and adjustment component mounting plate to improve the rigidity of the overall frame assembly.

[0029] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A five-dimensional attitude position adjustment device for optical elements within an optical system, characterized in that, include: The base (1) is provided with a first set of threaded holes and a first temporary mounting hole for installing the first micrometer knob; The Y-axis movable plate (2) is connected to the base (1) by a first bolt assembly. The first bolt assembly passes through the Y-axis waist-shaped hole provided on the Y-axis movable plate (2) and is screwed into the first set of threaded holes of the base (1), so that the Y-axis movable plate (2) can move along the direction defined by the Y-axis waist-shaped hole and be locked. The X-direction moving plate (3) is connected to the Y-direction moving plate (2) by a second bolt assembly. The second bolt assembly passes through the X-direction waist-shaped hole provided on the X-direction moving plate (3) and is screwed into the second set of threaded holes provided on the Y-direction moving plate (2), so that the X-direction moving plate (3) can move along the direction defined by the X-direction waist-shaped hole and be locked. The frame support (4) and the adjustment component mounting plate (5) are fixedly installed on the upper surface of the X-direction moving plate (3); The frame assembly (6) is supported on the X-direction moving plate (3) by a ball joint structure at its bottom, so that the frame assembly (6) can pitch and yaw relative to the X-direction moving plate (3); At least one micrometer knob (7) is selectively and temporarily mounted on a first temporary mounting hole on the base (1) or a second temporary mounting hole on the Y-axis moving plate (2) for precisely driving the Y-axis moving plate (2) or the X-axis moving plate (3) to translate during the adjustment phase; The pitch and yaw adjustment component (8) is installed on the adjustment component mounting plate (5), and its output end is connected to the side or back of the frame component (6) to drive and lock the pitch and yaw attitude of the frame component (6).

2. The five-dimensional attitude position adjustment device according to claim 1, characterized in that, The frame assembly (6) includes: The eyeglass frame (6-6) has the aforementioned ball joint structure at its bottom; The frame (6-3) is movably housed within the cavity of the frame (6-6); The Z-direction adjusting set screw (6-2) is screwed in from the bottom of the frame (6-6), and its top end acts on the bottom of the frame (6-3) to drive the frame (6-3) to move along the Z direction; The top limiting set screw (6-1) is screwed in from the top of the frame (6-6), and its end can be embedded into the groove at the top of the frame (6-3) to achieve axial limiting and auxiliary locking of the frame (6-3).

3. The five-dimensional attitude position adjustment device according to claim 2, characterized in that, The ball joint structure includes a pad (6-4) fixed to the bottom of the frame (6-6) and a ball (6-5) partially embedded in the ball socket at the bottom of the pad (6-4). The lower part of the ball (6-5) contacts the upper surface of the X-direction moving plate (3) to form a low-friction support point.

4. The five-dimensional attitude position adjustment device according to claim 1, characterized in that, The pitch and yaw adjustment assembly (8) includes: The external hexagonal hollow screw (8-2) is threadedly connected to the mounting plate (5) of the adjustment assembly; The ball head bushing (8-4) has a cylindrical end that forms a clearance fit with the connecting hole provided on the frame assembly (6); The ball socket washer (8-3) is sleeved on the ball head end of the ball head bushing (8-4) and accommodated in the end cavity of the external hexagonal hollow screw (8-2), so that the ball head of the ball head bushing (8-4) and the ball socket of the ball socket washer (8-3) form a spherical pair; The fixing locking bolt (8-1) passes through the external hexagonal hollow screw (8-2), the ball socket washer (8-3) and the ball head bushing (8-4) in sequence, and then connects to the threaded hole on the frame assembly (6).

5. The five-dimensional attitude position adjustment device according to claim 4, characterized in that, The pitch and yaw adjustment components (8) are in three sets and are distributed on the adjustment component mounting plate (5) in an inverted equilateral triangle layout, with one set located at the bottom center and the other two sets located on the top sides.

6. The five-dimensional attitude position adjustment device according to claim 4, characterized in that, The threaded pair between the external hexagonal hollow screw (8-2) and the mounting plate (5) of the adjustment assembly is a self-locking threaded pair, and its lead angle is smaller than the equivalent friction angle of the threaded pair.

7. The five-dimensional attitude position adjustment device according to claim 6, characterized in that, At the threaded engagement point between the external hexagonal hollow screw (8-2) and the adjustment assembly mounting plate (5), a curing adhesive can be applied to form additional axial restraint against vibration.

8. The five-dimensional attitude position adjustment device according to claim 1, characterized in that, After the micrometer knob (7) has been adjusted in the X or Y direction and the corresponding bolt assembly has been tightened, it can be removed from the base (1) or the Y-axis moving plate (2) for reuse in other workstations.

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