Stage for an optical system

Abstract

The utility model discloses a stage for optical system, including base body, lift, transmission mechanism, drive motor and control module, the lift is along vertical slidingly arranged on the base body, the bottom of lift is equipped with first inclined cooperation face, the transmission mechanism includes screw rod and moving block, the screw rod is horizontally arranged on the base body, the moving block is with screw rod screw connection, and the moving block is along horizontal slidingly arranged on the base body, the top of moving block is equipped with second inclined cooperation face, and the second inclined cooperation face supports in the bottom of first inclined cooperation face and both slidingly cooperate, the drive motor is used for driving the rotation of screw rod. This stage for optical system can significantly reduce the vertical space occupation of device, improve the adaptability to compact optical experimental system. Also effectively promoted the anti-overturning ability and motion stability of stage, satisfies the high-precision positioning demand of optical element.

Description

Technical Field

[0001] This utility model relates to the field of optical experimental system technology, and in particular to a stage for optical systems. Background Technology

[0002] In optical experimental systems, precise adjustment of the vertical height of optical components (such as lens groups, mirrors, filters, detectors, etc.) is required. Currently, most mainstream motion control devices adopt a traditional vertically stacked structure of "motor-lead screw / guide rail-stage," characterized by: a drive motor fixed to the bottom of the device, a vertically placed lead screw connected via a coupling, the lead screw connected to the stage, and guide rail pairs (such as linear slides) providing guidance and support. This type of motion control device has a relatively high overall structure, while some optical experimental systems are quite compact with limited vertical installation space. Exceeding the height limit of the motion control device poses a challenge to the construction of the optical experimental system. Utility Model Content

[0003] In view of this, the present invention proposes a stage for an optical system, the purpose of which is to achieve a flattened stage to meet the application requirements of compact optical experimental systems.

[0004] The solution provided by this utility model includes:

[0005] A stage for an optical system, comprising:

[0006] The base, lifting platform, transmission mechanism, drive motor, and control module;

[0007] The lifting platform is slidably mounted on the base in a vertical direction, and the bottom of the lifting platform is provided with a first inclined mating surface;

[0008] The transmission mechanism includes a screw and a moving block. The screw is horizontally disposed on the base, and the moving block is threadedly connected to the screw and is slidably disposed on the base. The top of the moving block is provided with a second inclined mating surface, which is supported on the bottom of the first inclined mating surface and the two are slidably mated.

[0009] The drive motor is used to drive the screw to rotate.

[0010] As a further optional solution, a vertical sliding guide assembly is provided between the base and the lifting platform. The vertical sliding guide assembly includes a first guide rail and a first guide block arranged vertically. One of the first guide rail and the first guide block is disposed on the lifting platform, and the other is disposed on the base.

[0011] As a further optional solution, a horizontal sliding guide assembly is provided between the base and the moving block. The horizontal sliding guide assembly includes a horizontally arranged second guide rail and a second guide block, one of which is disposed on the moving block and the other is disposed on the base.

[0012] As a further optional solution, an inclined sliding guide assembly is provided between the moving block and the lifting platform. The inclined sliding guide assembly includes an inclined third guide rail and a third guide block, one of which is disposed on the first inclined mating surface and the other is disposed on the second inclined mating surface.

[0013] As a further optional solution, the drive motor is a stepper motor;

[0014] The base is provided with a control module for controlling the movement of the drive motor. The control module includes a circuit board, on which a secondary power supply circuit, an MCU main control unit circuit, a motor drive circuit, a control panel circuit, and a USB / Bluetooth to serial communication circuit are provided. The control module is electrically connected to the drive motor.

[0015] As a further optional solution, the base is provided with a first protective shell, and a control chamber is formed inside the first protective shell; the control module, the drive motor and at least part of the screw are disposed in the control chamber; the first protective shell is provided with a line interface, and the line interface is electrically connected to the control module.

[0016] As a further optional solution, the control panel circuit includes control buttons and / or Hall linear actuators disposed on the first protective housing.

[0017] As a further optional solution, the motor drive circuit includes a TMC2208 chip.

[0018] As a further optional solution, the drive motor is a dual-axis stepper motor, with one shaft end connected to the screw drive and the other shaft end equipped with a handwheel.

[0019] As a further optional solution, a second protective shell is provided on the base, the second protective shell being located below the lifting platform and surrounding the screw and the moving block.

[0020] Compared with the prior art, the stage for optical systems in this application has at least the following advantages:

[0021] The horizontally positioned screw indirectly drives the lifting platform via a moving block. The horizontal displacement is converted into vertical displacement through the engagement of the inclined mating surfaces between the moving block and the lifting platform. Compared to the traditional vertical structure of "motor-screw-stage," this significantly reduces the vertical space occupied by the device and improves its adaptability to compact optical experimental systems. Furthermore, the screw, moving block, base, and lifting platform form a stable, flattened mechanical support structure, effectively enhancing the stage's anti-tipping ability and motion stability, meeting the high-precision positioning requirements of optical components. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a stage for an optical system in one embodiment;

[0023] Figure 2 This is an exploded view of a stage for an optical system in one embodiment;

[0024] Figure 3 This is a cross-sectional schematic diagram of a stage for an optical system in one embodiment;

[0025] Figure 4 This is an exploded view of the base and the lifting platform in one embodiment;

[0026] Figure 5 This is a flowchart of the operation of a stage for an optical system in one embodiment;

[0027] Figure 6 This is a circuit structure diagram of the MCU main control unit circuit in one embodiment;

[0028] Figure 7 This is a circuit diagram of the secondary power supply circuit in one embodiment;

[0029] Figure 8 This is a circuit structure diagram of a motor drive circuit in one embodiment;

[0030] Figure 9 This is a circuit structure diagram of a USB / Bluetooth to serial communication circuit in one embodiment;

[0031] In the diagram: 1. Substrate; 11. First protective shell; 12. Second protective shell;

[0032] 2. Lifting platform;

[0033] 3. Transmission mechanism; 31. Screw; 32. Moving block; 321. Second inclined mating surface;

[0034] 4. Drive motor; 41. Handwheel;

[0035] 5. Control module; 51. Line interface; 52. Control buttons; 53. Hall effect linear actuator;

[0036] 6. Vertical sliding guide assembly; 61. First guide rail; 62. First guide block;

[0037] 7. Horizontal sliding guide assembly; 71. Second guide rail; 72. Second guide block;

[0038] 8. Inclined sliding guide assembly; 81. Third guide rail; 82. Third guide block. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] refer to Figures 1 to 4An embodiment of this utility model illustrates a stage for an optical system, comprising a base 1, a lifting platform 2, a transmission mechanism 3, and a drive motor 4; the lifting platform 2 is vertically slidably disposed on the base 1, and the bottom of the lifting platform 2 is provided with a first inclined mating surface (not marked in the figure); the transmission mechanism 3 includes a screw 31 and a moving block 32, the screw 31 is horizontally disposed on the base 1, the moving block 32 is threadedly connected to the screw 31, and the moving block 32 is horizontally slidably disposed on the base 1; the top of the moving block 32 is provided with a second inclined mating surface 321, the second inclined mating surface 321 is supported on the bottom of the first inclined mating surface and the two are slidably mated; the drive motor 4 is used to drive the screw 31 to rotate.

[0044] Specifically, when the drive motor 4 drives the screw 31 to rotate, the forward or reverse rotation of the screw 31 will drive the moving block 32 to move forward or backward on the horizontal plane. Since the moving block 32 is supported at the bottom of the lifting platform 2, and the moving block 32 and the lifting platform 2 are supported and engaged by the first inclined mating surface and the second inclined mating surface 321, the lifting platform 2 will rise or fall.

[0045] The horizontally positioned screw 31 indirectly drives the lifting platform 2 via the moving block 32. The horizontal displacement is converted into vertical displacement through the engagement of the inclined mating surfaces between the moving block 32 and the lifting platform 2. Compared to the traditional vertical structure of "motor-screw-stage", this significantly reduces the vertical space occupied by the device and improves its adaptability to compact optical experimental systems. The screw 31, moving block 32, base 1, and lifting platform 2 form a stable, flattened mechanical support structure, effectively improving the anti-tipping ability and motion stability of the stage, and meeting the high-precision positioning requirements of optical components.

[0046] In some embodiments, to improve the stability of the vertical sliding fit between the base 1 and the lifting platform 2, such as Figure 2 and Figure 4 As shown, a vertical sliding guide assembly 6 is provided between the base 1 and the lifting platform 2. The vertical sliding guide assembly 6 includes a first guide rail 61 and a first guide block 62 arranged vertically. One of the first guide rail 61 and the first guide block 62 is arranged on the lifting platform 2, and the other is arranged on the base 1.

[0047] In some embodiments, to improve the stability of the horizontal sliding fit between the substrate 1 and the movable block 32, such as Figure 2 and Figure 4 As shown, a horizontal sliding guide assembly 7 is provided between the base 1 and the moving block 32. The horizontal sliding guide assembly 7 includes a horizontally arranged second guide rail 71 and a second guide block 72. One of the second guide rail 71 and the second guide block 72 is disposed on the moving block 32, and the other is disposed on the base 1.

[0048] In some embodiments, to improve the stability of the tilting sliding fit between the lifting platform 2 and the moving block 32, such as Figure 2 and Figure 4 As shown, an inclined sliding guide assembly 8 is provided between the moving block 32 and the lifting platform 2. The inclined sliding guide assembly 8 includes an inclined third guide rail 81 and a third guide block 82. One of the third guide rail 81 and the third guide block 82 is provided on the first inclined mating surface, and the other is provided on the second inclined mating surface 321.

[0049] Furthermore, existing motion control devices typically consist of a DC power supply, controller, driver, stepper motor slide, and cables. Each functional unit is an independent device, and the devices are connected by cables to transmit power and control signals, thereby controlling and driving the motor rotation, and displacing the stage and the supported object through a transmission mechanism. The controller, driver, power supply, and electric slide occupy a large amount of space, and the cables are numerous, messy, and difficult to manage. Moreover, in laboratory settings with a large number of precision instruments, the motion control system connected by cables experiences electromagnetic interference from the switching power supply to the motion controller, driver, and the cables themselves. This electromagnetic interference can alter the input and output signals of instruments and sensors, easily leading to distorted experimental results.

[0050] In some embodiments, the drive motor 4 is a stepper motor; the base 1 is provided with a control module 5 for controlling the movement of the drive motor 4, the control module 5 includes a circuit board, and the circuit board is provided with a secondary power supply circuit, an MCU main control unit circuit, a motor drive circuit, a control panel circuit and a USB / Bluetooth to serial communication circuit; the control module 5 is electrically connected to the drive motor 4.

[0051] Specifically, the control module 5 in this embodiment integrates multiple circuits. The control module 5 has multiple control modes, such as control panel control and remote communication control. During operation, the secondary power supply circuit converts 220V AC power into 24V DC power and supplies it to other circuits. The circuit structure of the secondary power supply circuit can be referenced as follows: Figure 7 The circuit structure shown is for reference only; other circuit structures can be selected according to the actual situation.

[0052] In this embodiment, the control panel includes control buttons 52 and / or Hall effect linear actuators 53; such as Figure 5As shown, when the user uses the control panel, the MCU (Microcontroller Unit) detects the signal from the control button 52 or the Hall linear actuator 53. The MCU then sends a signal to the motor drive circuit, which drives the motor 4 to perform the corresponding movement. If the MCU does not detect the signal from the control button 52 or the Hall linear actuator 53, the motor 4 remains stationary. The amplitude of the Hall linear actuator 53 determines the high or low level of the output signal. The digital signal converted by the ADC in the MCU retains the signal strength information and, after processing by the MCU, is converted into a control signal for the motor speed, thus achieving manual stepless speed regulation. The MCU main control unit circuit can be referenced... Figure 6 The circuit structure shown is for reference only; other circuit structures can be selected according to the actual situation.

[0053] Preferably, the motor drive circuit includes a TMC2208 chip, which can be referred to as follows. Figure 8 The circuit structure shown demonstrates that, compared to commonly used driver ICs such as the DRV8825 series, the TMC2208 chip offers a microstepping level of up to 256 times. This high microstepping control results in lower noise, less vibration, and higher positioning accuracy for the drive motor 4. The transmission mechanism 3 driven by the drive motor 4 operates more smoothly.

[0054] In addition, such as Figure 5 As shown, when the user uses remote communication control, the USB / Bluetooth to serial communication circuit receives control commands from the host computer (such as a computer, PLC, mobile phone, tablet, or other Bluetooth device), which are then converted into control signals for the motor drive circuit by the MCU. This enables forward and reverse rotation control of the drive motor 4, and the host computer can also control and adjust the speed of the drive motor 4. The circuit structure of the USB / Bluetooth to serial communication circuit can be found in [reference needed]. Figure 9 The circuit structure shown is for reference only; other circuit structures can be selected according to the actual situation.

[0055] like Figure 1 and Figure 2 As shown, the base is provided with a first protective shell 11, and a control chamber (not marked in the figure) is formed inside the first protective shell 11; the control module 5, the drive motor 4, and at least part of the screw 31 are disposed in the control chamber; the first protective shell 11 is provided with a line interface 51, which is electrically connected to the control module 5. The first protective shell 11 is made of a metal shell, such as aluminum alloy. The line interface 51 can be used to connect to a DC power input line, realizing both power supply and communication, and reducing cables.

[0056] Thus, compared to existing technologies, the aforementioned control module 5 has many advantages, including small size, high integration, fewer cables, and the ability to be installed inside the stage. The first protective shell 11 protects the control module 5, shielding it from potential electromagnetic signal leakage and isolating it from external electromagnetic interference. This reduces electromagnetic pollution in the operating environment, minimizes or even eliminates interference from other instruments and equipment, and prevents distortion of instrument input / output signals caused by electromagnetic interference. This improves the stability of the stage in optical systems.

[0057] In some embodiments, such as Figure 3 As shown, the drive motor 4 is a dual-axis stepper motor, with one shaft end connected to the screw 31 for transmission, and the other shaft end equipped with a handwheel 41. The screw 31 can be manually rotated by turning the handwheel 41, thus manually controlling the lifting of the lifting platform 2. It should be noted that the dual-axis stepper motor is existing technology, so its specific structure will not be described in detail here.

[0058] In some embodiments, such as Figure 2 As shown, a second protective shell 12 is provided on the base 1. The second protective shell 12 is located below the lifting platform 2 and surrounds the screw 31 and the moving block 32. By providing the second protective shell 12, interference from external foreign objects on the movement of the moving block 32 and the lifting platform 2 can be reduced, thereby improving operational stability.

[0059] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0060] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A stage for an optical system, characterized by, include: The base, lifting platform, transmission mechanism, and drive motor; The lifting platform is slidably mounted on the base in a vertical direction, and the bottom of the lifting platform is provided with a first inclined mating surface; The transmission mechanism includes a screw and a moving block. The screw is horizontally disposed on the base, and the moving block is threadedly connected to the screw and is slidably disposed on the base. The top of the moving block is provided with a second inclined mating surface, which is supported on the bottom of the first inclined mating surface and the two are slidably mated. The drive motor is used to drive the screw to rotate.

2. The stage for an optical system according to claim 1, characterized in that: A vertical sliding guide assembly is provided between the base and the lifting platform. The vertical sliding guide assembly includes a first guide rail and a first guide block arranged vertically. One of the first guide rail and the first guide block is arranged on the lifting platform, and the other is arranged on the base.

3. The stage for an optical system according to claim 2, characterized in that: A horizontal sliding guide assembly is provided between the base and the moving block. The horizontal sliding guide assembly includes a second guide rail and a second guide block arranged horizontally. One of the second guide rail and the second guide block is disposed on the moving block, and the other is disposed on the base.

4. The stage for an optical system according to claim 3, characterized in that: An inclined sliding guide assembly is provided between the moving block and the lifting platform. The inclined sliding guide assembly includes an inclined third guide rail and a third guide block. One of the third guide rail and the third guide block is disposed on the first inclined mating surface, and the other is disposed on the second inclined mating surface.

5. The stage for an optical system according to claim 1, characterized in that: The drive motor is a stepper motor; The base is provided with a control module for controlling the movement of the drive motor. The control module includes a circuit board, on which a secondary power supply circuit, an MCU main control unit circuit, a motor drive circuit, a control panel circuit, and a USB / Bluetooth to serial communication circuit are provided. The control module is electrically connected to the drive motor.

6. The stage for an optical system according to claim 5, characterized in that: The substrate is provided with a first protective shell, and a control chamber is formed inside the first protective shell; the control module, the drive motor and at least part of the screw are disposed in the control chamber; the first protective shell is provided with a line interface, and the line interface is electrically connected to the control module.

7. The stage for an optical system according to claim 6, characterized in that: The control panel circuit includes control buttons and / or Hall effect linear actuators disposed on the first protective housing.

8. The stage for an optical system according to claim 6, characterized in that: The motor drive circuit includes a TMC2208 chip.

9. The stage for an optical system according to claim 6, characterized in that: The drive motor is a dual-axis stepper motor, with one shaft end connected to the screw drive and the other shaft end equipped with a handwheel.

10. The stage for an optical system according to claim 4, characterized in that: The base is provided with a second protective shell, which is located below the lifting platform and surrounds the screw and the moving block.

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