Optical lens piezoelectric rotation micro-adjustment structure

Abstract

The utility model relates to piezoelectric rotation micro -adjustment structure technical field, specifically disclose a kind of optical lens piezoelectric rotation micro -adjustment structure, comprising: table body fixed surface, table body fixed surface outside is equipped with rotary moving surface, flexible hinge is connected between rotary moving surface and table body fixed surface, table body fixed surface one side is equipped with adjusting module, adjusting module is connected with rotary moving surface, adjusting module carries out angle micro -adjustment to optical lens by adjusting the rotation angle of rotary moving surface, this optical lens piezoelectric rotation micro -adjustment structure, by using flexible hinge, avoid the abrasion and idle stroke error generated due to sliding friction, utilize the high-precision driving characteristics of piezoelectric ceramic, realized the accurate adjustment of optical lens angle, improved the angle positioning stability of long-term use, the design of capacitive sensor can real-time monitoring the position change of rotary moving surface, ensure the stability and reliability of optical lens under complex environment.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric rotational micro-adjustment structure technology, specifically a piezoelectric rotational micro-adjustment structure for optical lenses. Background Technology

[0002] In recent years, with the rapid development of laser communication, it has become an important indicator of a country's comprehensive strength and a crucial guarantee for promoting the sustained development of the national economy and the security of national strategic basic industries. As laser communication continues to develop, the quality requirements for laser reflection micro-adjustment and precise operation are becoming increasingly stringent, thus placing higher demands on the quality and efficiency of optical lens micro-adjustment and packaging.

[0003] Currently, most existing micro-adjustment structures employ motors and piezoelectric ceramics as drives. The piezoelectric ceramic drive method uses resistance strain gauges as feedback sensors, with the strain gauges bonded to the piezoelectric ceramic itself. This process affects the lifespan and reliability of the piezoelectric ceramic. Traditional rotary adjustment mechanisms suffer from precision degradation due to mechanical friction, and backlash errors caused by rigid hinge gaps. Mechanical hinges are prone to wear and backlash due to sliding friction, leading to inaccurate angle positioning after long-term use. Therefore, we propose a piezoelectric rotary micro-adjustment structure for optical lenses. Utility Model Content

[0004] The purpose of this invention is to provide an optical lens piezoelectric rotation micro-adjustment structure to solve the problems mentioned in the background art, such as the accuracy decay caused by mechanical friction, the backlash error caused by rigid hinge gap, and the wear and backlash of mechanical hinges due to sliding friction, which lead to inaccurate angle positioning after long-term use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an optical lens piezoelectric rotation micro-adjustment structure, comprising: a stage fixed surface, a rotational moving surface provided on the outer side of the stage fixed surface, a flexible hinge connecting the rotational moving surface and the stage fixed surface, an adjustment module provided on one side of the stage fixed surface, the adjustment module being connected to the rotational moving surface, and the adjustment module performing angle micro-adjustment of the optical lens by adjusting the rotation angle of the rotational moving surface.

[0006] The adjustment module includes a platform fixed end flexible hinge fixedly connected to the bottom of the platform fixed surface, a piezoelectric ceramic fixed end contact block fixedly connected to the platform fixed end flexible hinge, a piezoelectric ceramic fixed end contact block fixedly connected to the piezoelectric ceramic, a piezoelectric ceramic push end contact block fixedly connected to the other end of the piezoelectric ceramic, and a rotating moving surface fixedly connected to the piezoelectric ceramic push end contact block.

[0007] The rotating moving surface includes a platform rotating surface flexible hinge fixedly connected to the piezoelectric ceramic push end contact block. The platform rotating surface flexible hinge is fixedly connected to the rotating moving surface. A boss is fixedly connected to the lower part of the rotating moving surface. The rotating moving surface is fixedly connected to the flexible hinge. A capacitive sensor is provided on the right side of the boss. The capacitive sensor is fixed to the platform fixed surface.

[0008] The bottom of the platform's fixed surface is equipped with a shock-absorbing pad.

[0009] The fixed surface of the platform has a chamfered transition at its edge.

[0010] The platform has a platform fixing hole on its fixing surface.

[0011] The rotating moving surface is provided with a rotating moving surface fixing hole.

[0012] There are two flexible hinges connecting the rotating moving surface and the fixed surface of the platform, which are at a 90-degree angle to each other.

[0013] This utility model has at least the following beneficial effects:

[0014] In use, this invention employs a flexible hinge to avoid wear and backlash errors caused by sliding friction. Utilizing the high-precision driving characteristics of piezoelectric ceramics, it achieves precise adjustment of the optical lens angle, improving the long-term stability of angle positioning. The combination of the rapid response capability of piezoelectric ceramics and the frictionless movement of the flexible hinge enhances adjustment efficiency and dynamic performance. The capacitive sensor design allows for real-time monitoring of changes in the position of the rotating moving surface, ensuring the stability and reliability of the optical lens in complex environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a rear oblique view of the structure of this utility model;

[0018] Figure 4 This is a bottom view of the structure of this utility model.

[0019] In the diagram: 1. Fixed surface of the platform; 2. Adjustment module; 21. Piezoelectric ceramic fixed end contact block; 22. Flexible hinge of the fixed end of the platform; 23. Piezoelectric ceramic push end contact block; 24. Piezoelectric ceramic; 3. Rotating moving surface; 31. Flexible hinge of the rotating surface of the platform; 32. Boss; 33. Capacitive sensor; 34. Flexible hinge; 4. Shock-absorbing pad; 5. Chamfered transition; 6. Fixed hole of the platform; 7. Fixed hole of the rotating moving surface. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] Please see Figures 1 to 4 This utility model provides a technical solution: an optical lens piezoelectric rotation micro-adjustment structure, including: a stage fixed surface 1, a rotation moving surface 3 provided on the outer side of the stage fixed surface 1, a flexible hinge 34 connecting the rotation moving surface 3 and the stage fixed surface 1, an adjustment module 2 provided on one side of the stage fixed surface 1, the adjustment module 2 being connected to the rotation moving surface 3, and the adjustment module 2 performing angle micro-adjustment of the optical lens by adjusting the rotation angle of the rotation moving surface 3.

[0023] The adjustment module 2 embeds a piezoelectric ceramic 24. The piezoelectric ceramic 24 generates minute displacements through electrostriction, causing the rotating moving surface 3 to rotate, thereby achieving high-precision angle adjustment of the optical lens. Specifically, it generates thrust by controlling the axial deformation of the piezoelectric ceramic 24 with voltage, driving the optical lens to rotate. A flexible hinge 34 connects the rotating moving surface 3 to the fixed surface 1 of the platform, enabling the conversion of the axial displacement of the piezoelectric ceramic 24 into rotational motion. When an external voltage is applied to the piezoelectric ceramic 24, it deforms accordingly based on the input voltage value. The deformation is linearly related to the voltage. The axial thrust generated by the deformation is transmitted through the flexible hinge 34, causing the rotating moving surface 3 to rotate, thereby changing the angle of the optical lens fixed on it. By precisely controlling the voltage, the angle of the optical lens can be continuously adjusted.

[0024] The adjustment module 2 includes a platform fixed end flexible hinge 22 fixedly connected to the platform fixed surface 1. The other end of the platform fixed end flexible hinge 22 is fixedly connected to the piezoelectric ceramic fixed end contact block 21. The piezoelectric ceramic fixed end contact block 21 is fixedly connected to a piezoelectric ceramic 24. The other end of the piezoelectric ceramic 24 is provided with a piezoelectric ceramic push end contact block 23. Under the action of voltage, the piezoelectric ceramic 24 extends axially, and the piezoelectric ceramic push end contact block 23 moves in the direction of the rotational moving surface 3. Due to the pre-bending design of the platform fixed end flexible hinge 22, this axial movement is constrained to be a linear movement perpendicular to the platform fixed surface 1, ensuring that the movement direction of the piezoelectric ceramic push end contact block 23 remains perpendicular to the rotation axis of the flexible hinge 34.

[0025] The rotating moving surface 3 includes a platform rotating surface flexible hinge 31 fixedly connected to the piezoelectric ceramic push end contact block 23. One end of the platform rotating surface flexible hinge 31 is fixedly connected to the piezoelectric ceramic push end contact block 23, and the other end is fixedly connected to the rotating moving surface 3. A platform rotating surface boss 32 extends from the lower part of the rotating moving surface 3. A capacitive sensor 33 is provided on the right side of the boss. The capacitive sensor 33 is fixed to the platform fixed surface 1, monitors the rotation angle of the boss 32 in real time, and feeds back the signal to the control system. When the piezoelectric ceramic push end contact block 23 moves, the platform rotating surface flexible hinge 31 bends and deforms, causing the rotating moving surface 3 to rotate around its axis. The rotation angle of the platform rotating surface boss 32 is accurately transmitted to the optical lens. The capacitive sensor 33 collects the displacement data of the boss 32 in real time and dynamically adjusts the driving voltage of the piezoelectric ceramic 24 through a closed-loop control algorithm to achieve nanometer-level angle adjustment accuracy.

[0026] Example 2

[0027] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the bottom of the platform fixing surface 1 is provided with a shock-absorbing pad 4, made of silicone or rubber, which effectively isolates the transmission of external vibrations, ensures the stability of the piezoelectric ceramic drive, and avoids the offset or angular error of the rotating moving surface caused by vibration. The edge of the platform fixing surface 1 is provided with a chamfer transition 5 to optimize the mechanical distribution of the edge of the platform fixing surface, reduce the risk of crack propagation caused by stress concentration, and reduce the safety hazards when the operator comes into contact with sharp edges. The platform fixing surface 1 is provided with a platform fixing hole 6 to connect with the external support structure, preventing the structure from loosening due to micro-vibrations generated by the piezoelectric ceramic drive and improving the reliability of long-term operation. The rotating moving surface 3 is provided with a rotating moving surface fixing hole 7 for locking the lens and avoiding slight offset caused by environmental interference or mechanical stress. There are two flexible hinges 34 connecting the rotating moving surface 3 and the platform fixing surface 1, which are at a 90-degree angle to reduce unexpected lateral displacement or deflection.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piezoelectric rotational micro-adjustment structure for an optical lens, comprising: The stage fixing surface is characterized in that: a rotating moving surface is provided on the outer side of the stage fixing surface, a flexible hinge is connected between the rotating moving surface and the stage fixing surface, an adjustment module is provided on one side of the stage fixing surface, the adjustment module is connected to the rotating moving surface, and the adjustment module makes fine adjustments to the angle of the optical lens by adjusting the rotation angle of the rotating moving surface.

2. The optical lens piezoelectric rotation micro-adjustment structure according to claim 1, characterized in that: The adjustment module includes a platform fixed end flexible hinge fixedly connected to the bottom of the platform fixed surface. The platform fixed end flexible hinge is fixedly connected to a piezoelectric ceramic fixed end contact block. The piezoelectric ceramic fixed end contact block is fixedly connected to a piezoelectric ceramic. The other end of the piezoelectric ceramic is fixedly connected to a piezoelectric ceramic pushing end contact block. The piezoelectric ceramic pushing end contact block is fixedly connected to a rotating moving surface.

3. The optical lens piezoelectric rotation micro-adjustment structure according to claim 1, characterized in that: The rotating moving surface includes a platform rotating surface flexible hinge fixedly connected to the piezoelectric ceramic push end contact block. The platform rotating surface flexible hinge is fixedly connected to the rotating moving surface. A boss is fixedly connected to the lower part of the rotating moving surface. The rotating moving surface is fixedly connected to the flexible hinge. A capacitive sensor is provided on the right side of the boss. The capacitive sensor is fixed to the platform fixed surface.

4. The optical lens piezoelectric rotation micro-adjustment structure according to claim 1, characterized in that: The bottom of the platform's fixed surface is equipped with a shock-absorbing pad.

5. The optical lens piezoelectric rotation micro-adjustment structure according to claim 2, characterized in that: The fixed surface of the platform has a chamfered transition at its edge.

6. The optical lens piezoelectric rotation micro-adjustment structure according to claim 2, characterized in that: The platform has a platform fixing hole on its fixing surface.

7. The optical lens piezoelectric rotation micro-adjustment structure according to claim 3, characterized in that: The rotating moving surface is provided with a rotating moving surface fixing hole.

8. The optical lens piezoelectric rotation micro-adjustment structure according to claim 3, characterized in that: There are two flexible hinges connecting the rotating moving surface and the fixed surface of the platform, which are at a 90-degree angle to each other.

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