Electro-hydraulic servo variable liquid lens light path adjustment control system
The focal length and eccentric position of the liquid lens are adjusted through electro-hydraulic servo control technology, which solves the problems of insufficient optical path adjustment accuracy and slow response in the prior art, and realizes real-time and accurate adjustment of the optical path when the laser light source and lens are fixed.
Patent Information
- Application Number
- CN202510213780.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-04-18
AI Technical Summary
The prior art is difficult to achieve accurate and real-time optical path adjustment when the laser light source and lens are fixed, and the traditional adjustment method has problems of insufficient accuracy and slow response.
The electro-hydraulic servo control technology is adopted to accurately adjust the focal length of the lens and the eccentric position of the main optical axis by adjusting the liquid pressure in the liquid lens, thereby real-time adjustment of the optical path. The system includes a variable liquid lens, a light spot detector, a controller, a hydraulic micropump, a flow valve and a closed liquid bottle. The shape and optical path of the liquid lens are accurately controlled through real-time feedback of the light spot detector and the calculation and adjustment of the controller.
Real-time accurate adjustment of the optical path when the laser light source and lens are fixed is achieved, the adjustment accuracy and response speed are improved, the accuracy and slow response problems of traditional adjustment methods are avoided, and the complexity and maintenance costs of the system are reduced.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electro-hydraulic servo control and optical adjustment, and in particular to an electro-hydraulic servo variable liquid lens optical path adjustment control system. Background Art
[0002] Traditional optical systems usually adjust the laser light source and lens position through mechanical or electric devices to change the focal length and the eccentric position of the optical axis. However, in many applications, the laser light source and lens need to be fixed, and the adjustment of the focal length and optical axis is still necessary. Although the existing liquid lens technology has flexible adjustment capabilities, it often relies on mechanical structures or external adjustments, and it is difficult to achieve accurate and real-time optical path adjustment when the laser light source and lens are fixed. In addition, traditional adjustment methods usually have problems such as insufficient accuracy and slow response. Therefore, there is an urgent need for a new control system that can automatically adjust the focal length and the eccentric position of the main optical axis by accurately controlling the deformation of the variable liquid lens while the laser light source and lens are fixed, thereby changing and adjusting the optical path in real time. Summary of the invention
[0003] In order to solve the above technical problems, the present application provides a variable liquid lens optical path adjustment control system based on electro-hydraulic servo control. The system can accurately adjust the focal length of the lens and the eccentric position of the main optical axis by adjusting the liquid pressure in the liquid lens under the premise of fixing the laser light source and the lens, thereby changing and adjusting the optical path in real time.
[0004] The electro-hydraulic servo variable liquid lens optical path adjustment control system includes the following components: a variable liquid lens, a light spot detector, a controller, a hydraulic micro pump, a flow valve, a closed liquid bottle, and a laser light source, wherein:
[0005] The variable liquid lens is composed of a flexible transparent pressure-resistant material and a transparent liquid. The upper and lower end points of the liquid lens are connected to the flow valve to achieve pipeline connection. By adjusting the pressure of the liquid inside, the focal length and the eccentric position of the optical axis of the lens are changed. The deformation of the liquid lens is divided into changes in the axial and longitudinal directions, thereby adjusting the focal length and the offset of the optical axis.
[0006] The light spot detector is used to detect the position of the controlled output light spot of the variable liquid lens, which is realized by using vision plus grid coordinate positioning. The light spot is found by the visual instrument, its coordinate position is determined, and the generated information is fed back to the controller as a feedback signal to control the flow valve 1 and the flow valve 2 to work and adjust the shape of the variable lens.
[0007] The controller is used to receive the position signal fed back by the light spot detector, calculate the required adjustment amount, and control flow valve 1 and flow valve 2 to determine the filling and discharge of transparent liquid, thereby adjusting the pressure of the liquid in the liquid lens and accurately adjusting the focal length of the lens and the eccentric position of the main optical axis.
[0008] The hydraulic micro pump and the sealing liquid bottle constitute a liquid source and a pressurized liquid, provide power for the system to work, and store or supply the transparent liquid; the hydraulic micro pump controls the inflow and discharge of the transparent liquid according to the instructions of the controller.
[0009] The flow valve adopts a high-precision micro flow valve, and the controller controls the size of the valve opening to accurately adjust the flow of the hydraulic micro pump to ensure the adjustment accuracy of the liquid lens; the flow valve is controlled by the control signal of the controller, and the two ends are respectively connected to the liquid lens and the micro pump
[0010] In the initial state, the centers of mass of the variable liquid lens, the laser light source, and the light spot detector are all in the same straight line, and the pressures at both ends of the variable liquid lens are the same, that is, P1=P2.
[0011] The variable liquid lens, laser light source and light spot detector are all fixed.
[0012] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the electro-hydraulic servo variable liquid lens optical path adjustment control system provided by the embodiment of the present application can accurately adjust the focal length and optical axis eccentric position of the variable liquid lens through the electro-hydraulic servo control technology, realize real-time controllable adjustment of the optical path, without changing the position of the laser light source and the lens, with higher precision and stronger stability; the system feeds back the position signal of the controlled light spot output by the optical path in real time through the light spot detector, and the controller can instantly adjust the flow rate of the hydraulic micro pump so that the light spot is adjusted to the desired target position, ensuring the automatic adjustment of the optical path, and the response is faster and the repeatability is higher than the traditional manual adjustment method; in addition, the system does not rely on complex mechanical components, has a simple structure, is easy to integrate, and has low maintenance cost and high reliability; the coordination of the hydraulic micro pump and the high-precision flow valve makes the system highly sensitive to response, and is suitable for high-precision optical systems; the system has a simple design, low manufacturing cost, and high economic applicability, and is suitable for wide application in optical measurement, photomedical detection and treatment systems and other fields; through these advantages, the optical path adjustment control system provided by the present invention not only improves the adjustment accuracy and response speed of the optical system, but also maintains a simple structure and economy, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0015] Figure 1 The variable liquid lens optical path adjustment control system based on electro-hydraulic servo control provided in the embodiment of the present application
[0016] Figure 2 A schematic diagram of the structure of a variable liquid lens provided in an embodiment of the present application.
[0017] 1. Laser light source; 2. Variable liquid lens; 3. Light spot detector; 4. Flow valve 1; 5. Hydraulic micro pump; 6. Sealing liquid bottle; 7. Controller; 8. Flow valve 2. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but only represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] For ease of understanding, the following is a detailed introduction to an electro-hydraulic servo variable liquid lens optical path adjustment control system provided in the present application example. Figure 1 As shown, it includes: a laser light source 1; a variable liquid lens 2; a light spot detector 3; flow valves 4, 8; a hydraulic micro pump 5; a closed liquid bottle 6; a controller 7; wherein:
[0020] The variable liquid lens 2 is composed of a flexible transparent pressure-resistant material and a transparent liquid. The upper and lower ends of the liquid lens are connected to flow valves 4 and 8. By adjusting the pressure of the liquid inside, the focal length and the eccentric position of the optical axis of the lens are changed; the deformation of the liquid lens is divided into changes in the axial and longitudinal directions, thereby adjusting the focal length and the offset of the optical axis.
[0021] The light spot detector 3 is used to detect the position of the output controlled light spot of the variable liquid lens, which is realized by using vision plus grid coordinate positioning. The light spot is found by the visual instrument, its coordinate position is determined, and the generated information is fed back to the controller 7 as a feedback signal to control the flow valve 1 (4) and the flow valve 2 (8) to work and adjust the variable lens.
[0022] The controller 7 is used to receive the position signal fed back by the light spot detector, calculate the required adjustment amount, and control the flow valve 1 and the flow valve 2 to determine the filling and discharge of the transparent liquid, thereby adjusting the pressure of the liquid in the variable liquid lens 2 and accurately adjusting the focal length of the lens and the eccentric position of the main optical axis h.
[0023] The hydraulic micro pump 5 and the sealing liquid bottle 6 constitute a liquid source and a pressurized liquid, provide power for the system to work, and store or supply transparent liquid. The hydraulic micro pump controls the inflow and discharge of the transparent liquid according to the instructions of the controller 7. The hydraulic micro pump is driven by a motor.
[0024] The flow valves 4 and 8 are high-precision micro flow valves, and the controller 7 controls the size of the valve opening to accurately adjust the flow of the hydraulic micro pump to ensure the adjustment accuracy of the liquid lens. The flow valve is controlled by the control signal of the controller, and the two ends are connected to the liquid lens and the micro pump respectively.
[0025] In the initial state, the centers of mass of the variable liquid lens 2, the laser light source 1, and the light spot detector 3 are all in the same straight line, and all three are fixed. The pressure at both ends of the variable liquid lens is the same, that is, P1=P2, which is used to simulate a scene where the laser light source and the lens cannot move.
[0026] The variable liquid lens 2, h being the main optical axis, has a variable length and can be moved up and down, which is achieved by the numerical values of P1 and P2, i.e., the filling and discharging control.
[0027] The working status is shown in the table When P1=P2, the shape of the variable lens remains unchanged, and the position of the main optical axis remains unchanged. As P1=P2 and continues to increase, the main optical axis h becomes longer and the focal length of the lens becomes longer; conversely, as P1=P2 and continues to decrease, the main optical axis h becomes shorter and the focal length of the lens becomes smaller. When P1>P2, the shape of the variable lens changes, and the position of the main optical axis moves downward. At this time, the transparent liquid at P1 flows into the variable lens, and the transparent liquid at P2 flows out of the variable lens to form back pressure. When the two flow valves are adjusted to control the pressure difference Δ1=P1-P2 to increase, the main optical axis h becomes longer and the focal length of the lens becomes longer; conversely, when the pressure difference Δ1=P1-P2 is controlled to decrease, the main optical axis h becomes shorter and the focal length of the lens becomes smaller; thereby achieving the variable length of the main optical axis h and the ability to move up and down; When P1 < P2, the shape of the variable lens changes, and the position of the principal optical axis moves upward. At this time, the transparent liquid at P1 flows out of the variable lens to form a back pressure, and the transparent liquid at P2 flows into the variable lens. When the two flow valves are respectively adjusted to control the pressure difference Δ2 = P2 - P1 to increase, the principal optical axis h becomes longer and the focal length of the lens becomes larger; conversely, when the pressure difference Δ2 = P2 - P1 is controlled to decrease, the principal optical axis h becomes shorter and the focal length of the lens becomes smaller; thus, the length of the principal optical axis h can be changed and its position can be moved up and down;
[0028] The laser light source 1 irradiates the variable liquid lens 2 to form an optical path and projects the controlled output light spot on the light spot detector 3. According to the visual and grid coordinate positioning, a feedback signal is generated and transmitted to the controller 7. The controller receives the input signal, that is, the expected light spot coordinates, and calculates the adjustment amount through the error between the actual light spot projection point coordinates of the feedback signal and generates a control signal to control the flow valves 1(4) and 2(8), changing the shape of the variable liquid lens, thereby changing the length and position of the principal optical axis h, so as to control the controlled output light spot to be projected at the expected target position; The system consists of a hydraulic micro-pump 5 and a closed liquid bottle 6 to form a liquid source and pressurized liquid, serving as the power element.
[0029] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art: The electro-hydraulic servo variable liquid lens optical path adjustment control system provided by the embodiments of the present application, through the electro-hydraulic servo control technology, this system can accurately adjust and control the focal length and the optical axis eccentricity position of the variable liquid lens, realizing real-time and accurate adjustment of the optical path, without changing the positions of the laser light source and the lens, with higher precision and stronger stability; The system feeds back the position signal of the actual controlled output light spot in real time through the light spot detector, and the controller can timely adjust the flow output of the high-precision flow valve, thereby changing the optical path to make the controlled output light spot projected to the expected position, ensuring the automatic adjustment of the optical path. Compared with the traditional manual adjustment method, the response is faster; In addition, this system does not rely on complex mechanical components, has a simple structure, is easy to integrate, and has low maintenance costs and high reliability; The cooperation of the hydraulic micro-pump and the high-precision flow valve enables the system to respond quickly and is suitable for high-precision optical systems; The system design is simple, the manufacturing cost is low, it has high economic applicability, and is suitable for wide applications in fields such as optical measurement, optical medical detection and treatment systems. Through these advantages, the optical path adjustment control system provided by the present invention not only improves the adjustment precision and response speed of the optical system, but also maintains a simple structure and economy, and has a wide range of application prospects.
[0030] The above description is only a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.
Claims
1. An electro-hydraulic servo variable liquid lens optical path adjustment control system, characterized in that: The system includes: A variable liquid lens, a light spot detector, a controller, a hydraulic micro pump, a flow valve, a closed liquid bottle, and a laser light source; wherein: the variable liquid lens is composed of a flexible transparent pressure-resistant material and a transparent liquid, and can control its axial and longitudinal deformation lengths by liquid pressure, thereby changing the focal length and the eccentric position of the main optical axis; the light spot detector is used to detect the light spot position in real time and transmit the position signal to the controller; the controller adjusts the flow of the hydraulic micro pump according to the signal of the light spot detector, thereby changing the pressure of the liquid in the variable liquid lens and further adjusting the deformation of the lens; the hydraulic micro pump is used to provide liquid flow according to the instructions of the controller; the flow valve is controlled by the controller to open the valve size to adjust the flow of the hydraulic micro pump; the hydraulic micro pump is driven by a motor.
2. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that: The lens deformation of the variable liquid lens can adjust the focal length and the eccentric position of the main optical axis through liquid pressure; The upper and lower end points are connected to the hydraulic valve through pipelines.
3. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that: The light spot detector can detect the position of the controlled output light spot of the variable liquid lens, which is achieved by using vision plus grid coordinate positioning; the light spot is found by a visual instrument, its coordinate position is determined, and the generated information is fed back to the controller as a feedback signal.
4. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that: The controller can receive the position signal fed back by the light spot detector, calculate the required adjustment amount, and control flow valve 1 and flow valve 2 to determine the filling and discharge of transparent liquid, thereby adjusting the pressure of the liquid in the liquid lens and accurately adjusting the focal length of the lens and the eccentric position of the main optical axis.
5. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that: The variable liquid lens, laser light source and light spot detector are all fixed.
6. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that In the initial state, the centers of mass of the variable liquid lens, the laser light source, and the light spot detector are all in the same straight line, and the pressures at both ends of the variable liquid lens are the same, that is, P1=P2.
7. The electro-hydraulic servo variable liquid lens optical path adjustment control system according to claim 1, characterized in that: The hydraulic micro pump is a high-precision micro flow valve, and the flow valve switch is controlled by a control signal of a controller.