An optical path switching device, method, optical handle and laser treatment instrument

Abstract

The application discloses an optical path switching device and method, an optical handle and a laser treatment instrument, and relates to the technical field of optics. The optical path switching device comprises a motor, a first reflector, a first limiting module and a driving controller. The distance between the first reflector fixed on the rotating shaft of the motor and the first limit is detected through the first limiting module, so that when the motor drives the first reflector to a position at a first preset distance from the first limit, the rotating speed of the motor is automatically reduced, and the first reflector moves at a reduced speed towards the first limit until it stops at the first limit, so that the first reflector at the first limit can adjust the transmission path of the preset wavelength light to a second preset optical path. Since the speed of the first reflector moving to the first limit gradually decreases, the first reflector can accurately stop at the first limit, the error caused by inertia when the motor stops rotating is reduced, and the accuracy of the optical path switching is improved.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to an optical path switching device, method, optical handle, and laser therapy device. Background Technology

[0002] In existing technologies, optical transmission systems typically have multiple different optical transmission channels. Usually, only servo motors are used to control the rotation of the lens to change the light reflection angle and thus switch the optical path. However, servo motors are expensive and have low control precision. In some high-precision environments, they cannot meet the accuracy requirements for optical path switching, resulting in the environment of the switched optical transmission channel being less than expected, thus affecting the quality of optical transmission. Summary of the Invention

[0003] The main objective of this application is to provide an optical path switching device, method, optical handpiece, and laser therapy instrument, aiming to solve the technical problem of how to switch the optical transmission path more accurately.

[0004] To achieve the above objectives, this application provides an optical path switching device, which includes: a motor, a first reflector, a first limiting module, and a drive controller;

[0005] The drive controller is electrically connected to the motor and the first limit module respectively;

[0006] The first reflector is fixed to the rotating shaft of the motor; the first limiting module is fixed to the first limiting position, which has a common input port for a first preset optical path and a second preset optical path; the common input port is used to receive light of a preset wavelength.

[0007] The drive controller is used to control the motor to move the first reflector toward the first limit position based on the received first control command;

[0008] The first limiting module is used to send a first trigger signal to the drive controller when it detects that the distance between the first reflector and the first limit does not exceed a first preset distance, so that the drive controller controls the motor to reduce the rotation speed until the first reflector stops at the first limit.

[0009] When the first reflector is in the first limiting position, the transmission path of the preset wavelength light is adjusted from the first preset optical path to the second preset optical path.

[0010] In one embodiment, the first limiting module includes: a first limiting switch and a first baffle;

[0011] The first baffle is fixed to the first limit position, and the first limit switch is disposed on the first baffle; the first limit switch is electrically connected to the drive controller; the trigger point of the first limit switch is at a first preset distance from the first limit position.

[0012] The first limit switch is used to determine that the first reflector is at a first preset distance from the first limit when it is subjected to pressure applied by the first reflector, and to send the first trigger signal to the drive controller.

[0013] In one embodiment, the first reflector is further provided with a magnetic metal;

[0014] The first limiting module further includes: a first electromagnet;

[0015] The first electromagnet is disposed on the first baffle, and the first electromagnet is electrically connected to the drive controller;

[0016] The drive controller is further configured to drive the first electromagnet to attract the magnetic metal when it receives the first trigger signal.

[0017] In one embodiment, the drive controller is further configured to, upon receiving a switching command, first drive the first electromagnet to stop attracting the magnetic metal, and then control the motor to rotate so that the first reflector moves away from the first limit position.

[0018] In one embodiment, the first electromagnet is a de-energized electromagnet.

[0019] In one embodiment, the drive controller is further configured to control the motor to move the first reflector to a second limit position based on a received second control command, wherein the second limit position is located on the movement trajectory of the first reflector and does not intersect with the first preset optical path;

[0020] When the first reflector is in the second limiting position, it restores the transmission path of the preset wavelength light to the first preset optical path.

[0021] In one embodiment, the optical path switching device further includes: a second limiting module;

[0022] The second limit module is disposed at the second limit position and is electrically connected to the drive controller;

[0023] The second limiting module is used to send a second trigger signal to the drive controller when it detects that the distance between the first reflector and the second limit does not exceed a second preset distance, so that the drive controller controls the motor to decelerate and drive the first reflector to move to the second limit.

[0024] In one embodiment, the first preset optical path and the second preset optical path have a common output port.

[0025] In one embodiment, the second preset optical path includes a wavelength modulator, which is used to adjust the wavelength of the preset wavelength light;

[0026] The common output port has a dichroic mirror, which is used to keep the transmission direction of the preset wavelength light consistent before and after wavelength adjustment.

[0027] In one embodiment, the wavelength modulator is a frequency doubling crystal.

[0028] Furthermore, to achieve the above objectives, this application also proposes an optical path switching method, which is applied to the optical path switching device described above, and the steps of the optical path switching method include:

[0029] Based on control commands, the motor is controlled to move the first reflector.

[0030] Detect the distance between the first reflector and the first limit;

[0031] When the distance is detected to be no more than the first preset distance, the motor is controlled to reduce its rotation speed until the first reflector stops at the first limit position, so that the first reflector at the first limit position switches the transmission path of the preset wavelength light from the first preset optical path to the second preset optical path.

[0032] In addition, to achieve the above objectives, this application also proposes an optical handle, which includes the optical path switching device described above.

[0033] In addition, to achieve the above objectives, this application also proposes a laser therapy device, which includes a main unit and the optical handle described above; the main unit and the optical handle are connected by an optical fiber or a light guide arm; the main unit emits light of a preset wavelength through the optical fiber or the light guide arm to the common input port of the first preset optical path and the second preset optical path.

[0034] This application provides a light path switching device, method, optical handle, and laser therapy device. The light path switching device includes: a motor, a first reflector, a first limiting module, and a drive controller. The drive controller is electrically connected to the motor and the first limiting module. The first reflector is fixed on the rotation shaft of the motor. The first limiting module is fixed to a first limit position, and the first limit position has a common input port for a first preset light path and a second preset light path. The common input port is used to receive light of a preset wavelength. The drive controller is used to control the motor to move the first reflector toward the first limit position based on a received first control command. The first limiting module is used to send a first trigger signal to the drive controller when it detects that the distance between the first reflector and the first limit position does not exceed a first preset distance, so that the drive controller controls the motor to reduce its rotation speed until the first reflector stops at the first limit position. Wherein, when the first reflector is at the first limit position, the transmission path of the preset wavelength light is adjusted from the first preset light path to the second preset light path.

[0035] The first limiting module detects the distance between the first reflector fixed on the rotating shaft of the motor and the first limit switch. When the motor moves the first reflector to a position a first preset distance from the first limit switch, the motor's rotational speed is automatically reduced, causing it to decelerate and move towards the first limit switch until it stops there. This allows the first reflector at the first limit switch to adjust the transmission path of the preset wavelength light to a second preset optical path. Because the speed at which the first reflector moves to the first limit switch gradually decreases, the first reflector can accurately stop at the first limit switch, reducing errors caused by inertia when the motor stops rotating and improving the accuracy of optical path switching. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the optical path switching device according to Embodiment 1 of this application;

[0039] Figure 2 A partial structural schematic diagram of the optical path switching device according to Embodiment 2 of this application;

[0040] Figure 3 This is another partial structural schematic diagram provided for Embodiment 2 of the optical path switching device of this application;

[0041] Figure 4 This is a flowchart illustrating an embodiment of the optical path switching method of this application.

[0042] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0044] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0045] This application presents a first embodiment of an optical path switching device; please refer to... Figure 1 The optical path switching device includes: a motor 10, a first reflector ref1, a first limiting module 21, and a drive controller 30;

[0046] The drive controller 30 is electrically connected to the motor 10 and the first limit module 21 respectively;

[0047] The first reflector ref1 is fixed to the rotation shaft of the motor 10; the first limiting module 21 is fixed to the first limiting position, which has a common input port for a first preset optical path and a second preset optical path; the common input port is used to receive light of a preset wavelength.

[0048] The drive controller 30 is used to control the motor 10 to move the first reflector ref1 toward the first limit position based on the received first control command;

[0049] The first limiting module 21 is used to send a first trigger signal to the drive controller 30 when it detects that the distance between the first reflector ref1 and the first limit does not exceed a first preset distance, so that the drive controller 30 controls the motor 10 to reduce the rotation speed until the first reflector ref1 stops at the first limit.

[0050] When the first reflector ref1 is in the first limiting position, the transmission path of the preset wavelength light is adjusted from the first preset optical path to the second preset optical path.

[0051] It should be noted that in this embodiment, the first reflector ref1 can change the direction of light transmission by reflection. It can be fixed on the rotation shaft of the motor 10. When the motor 10 rotates, the first reflector ref1 will follow the rotation of the motor 10 and make circular motion, moving along an arc trajectory. As a preferred embodiment, the motor 10 can be a stepper motor, which makes the movement accuracy of the first reflector ref1 higher. In particular, when the first reflector ref1 is in the first limit position, the tilt angle of the first reflector ref1 causes the preset wavelength light to be reflected at a specific angle and transmitted along the second preset optical path.

[0052] It should be understood that, in this embodiment, the first preset optical path and the second preset optical path are two optical paths with different light transmission directions, and they have a common intersection point, i.e., a common input port, at the first limiting point. The preset light source 40 can emit preset wavelength light into the common input port of the two. If there is no first reflector ref1 at the first limiting point, the preset wavelength light is directly transmitted into the first preset optical path. If there is a first reflector ref1 at the first limiting point, the preset wavelength light will be reflected by the first reflector ref1 into the second preset optical path. In some embodiments, the preset light source 40 is an opening for the preset wavelength light to be incident in the sense of an optical element such as a lens or a mechanical structure that receives the preset wavelength light incident. In some embodiments, the preset light source 40 is an external laser emitting device.

[0053] It is easy to understand that in this embodiment, the drive controller 30 refers to an electronic device with control functions that integrates a drive chip. It is also connected to an external controller (not shown in the figure), which can be an electronic device such as a computer or mobile phone, and can send corresponding first control commands to the drive controller 30. The first limit module 21 can be set at the first limit position on one side of the arc of the movement trajectory of the first reflector ref1, so that when the first reflector ref1 moves with the motor 10 rotating in a certain direction, it can only move to the first limit position at most. In addition, the first limit module 21 also has a distance detection function, which can detect the distance between the first reflector ref1 and its own first limit position. If the distance is not greater than a preset first distance, it can be determined that the first reflector ref1 is about to move to the first limit position. At this time, a first trigger signal can be fed back to the drive controller 30, so that when the drive controller 30 receives the first trigger signal, it smoothly decelerates the motor 10 until the speed of the motor 10 decreases to 0.

[0054] It is worth noting that in this embodiment, the first limiting module 21 can determine the trigger condition that the distance between the first reflecting mirror ref1 and the first limit is not greater than a first preset distance through ultrasonic measurement (sending and receiving ultrasonic waves to the first reflecting mirror ref1), electromagnetic field measurement (installing a device that generates an electric or magnetic field on the first reflecting mirror ref1 and detecting the electric or magnetic field), or through physical contact, etc., which will not be elaborated here. The drive controller 30 is electrically connected to the first limiting module 21, which can be through a wire or through a wireless signal transmission component, without specific limitation. Figure 1 The image only shows the structural positional relationship and does not show the specific connection method between the two.

[0055] In a specific implementation, the drive controller 30 can send a corresponding drive signal to the motor 10 according to the received first control command, so as to control the motor 10 to rotate in a preset clockwise or counterclockwise rotation direction. Since the first reflector ref1 is set on the rotation axis of the motor 10, when the motor 10 rotates, the first reflector ref1 will follow the rotation of the motor 10 and move in a circular motion along an arc. At this time, the first limit module 21 detects the distance between the first reflector ref1 and the first limit in real time. When the distance is less than or equal to the first preset distance, a first trigger signal is generated and fed back to the drive controller 30. When the drive controller 30 receives the trigger signal, it will adjust the drive signal sent to the motor 10, so that the motor 10 begins to decelerate, and the first reflector ref1 also decelerates accordingly. When the motor 10 decelerates to 0, the first reflector ref1 also stops precisely at the first limit position, reflecting the preset wavelength light sent to the first limit position (the common input port of the first preset optical path and the second preset optical path), thus switching the transmission optical path of the preset wavelength light from the first preset optical path to the second preset optical path. Since the moving speed of the first reflector ref1 is related to the rotational speed of the motor 10, and the motor 10 will be controlled to decelerate when the distance between the first reflector ref1 and the first limit position does not exceed the first preset distance, the speed at which the first reflector ref1 moves to the first limit position will gradually decrease, allowing the first reflector ref1 to stop precisely at the first limit position, reducing the error caused by inertia when the motor 10 stops rotating, and improving the accuracy of optical path switching.

[0056] This application provides an optical path switching device, comprising: a motor, a first reflector, a first limiting module, and a drive controller; this application also provides an optical path switching device and method, comprising: a motor, a first reflector, a first limiting module, and a drive controller; the first limiting module detects the distance between the first reflector, fixed on the rotating shaft of the motor, and the first limiting module, so that when the motor moves the first reflector to a position a first preset distance from the first limiting module, the rotational speed of the motor is automatically reduced, causing it to decelerate and move towards the first limiting module until it stops at the first limiting module, thereby allowing the first reflector at the first limiting module to adjust the transmission path of a preset wavelength light to a second preset optical path. Because the speed at which the first reflector moves to the first limiting module gradually decreases, the first reflector can accurately stop at the first limiting module, reducing errors caused by inertia when the motor stops rotating and improving the accuracy of optical path switching.

[0057] Based on the first embodiment of the optical path switching device of this application, in the second embodiment of the optical path switching device of this application, the contents that are the same as or similar to those in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 as well as Figure 3 The first limit module 21 includes: a first limit switch SW1 and a first baffle B1;

[0058] The first baffle B1 is fixed to the first limit position, and the first limit switch SW1 is disposed on the first baffle B1; the first limit switch SW1 is electrically connected to the drive controller 30; the trigger point of the first limit switch SW1 is at a first preset distance from the first limit position.

[0059] The first limit switch SW1 is used to determine that the first reflector ref1 is at a first preset distance from the first limit when it is subjected to pressure applied by the first reflector ref1, and to send the first trigger signal to the drive controller 30.

[0060] It should be understood that, reference Figure 2 , Figure 2 Only the specific structural composition of the rotation shaft of motor 10, the limiting module and the first reflector ref1 is shown. The electrical connection relationship of the specific components and the other components are not shown. The electrical connection relationship between the first limiting module 21, the second limiting module 22, motor 10 and drive controller 30 is not shown, but it cannot be assumed that they do not exist.

[0061] It should be noted that the first baffle B1 is fixed to the first limit position, mainly serving as a physical limit and fixing components such as the first limit switch SW1. In this embodiment, the first limit module 21 is fixed to the first baffle B1 of the first limit position, and the first limit position serves as one end of the movable area of ​​the first reflector ref1. In specific implementation, when the first reflector ref1 moves to the first limit position as the motor 10 rotates, it applies pressure to the first limit switch SW1 in the contacting first limit module 21 (the trigger point of the first limit switch SW1 can be specifically set at a position at a first preset distance from the first limit position), causing the first limit switch SW1 to generate a first trigger signal, which is transmitted to the drive controller 30. The drive controller 30 adjusts the electrical parameters of the drive signal sent to the motor 10, causing the motor 10 to continuously decelerate and rotate in the original direction. The first reflector ref1 also decelerates and moves with the motor 10 until the first reflector ref1 moves exactly to the first limit position, at which point the motor 10 stops rotating. Thus, because motor 10 continuously decelerates, its inertia when it stops moving will be relatively small, ensuring that the stationary position of the first reflector ref1 is precisely at the first limit, further guaranteeing the accuracy of the optical path switching. It should be understood that... Figure 2 The image shown is merely a side view of one aspect of the structure of this solution; in some three-dimensional structural diagrams, it may be shown that the length of the first reflector ref1 extending along the direction perpendicular to the screen (the plane in the diagram) is greater than the length of the first limit switch SW1, so that the aforementioned preset wavelength light can illuminate the first reflector ref1.

[0062] Furthermore, in this embodiment, the first reflector ref1 is also provided with a magnetic metal M;

[0063] The first limiting module 21 further includes: a first electromagnet EM1;

[0064] The first electromagnet EM1 is disposed on the first baffle B1, and the first electromagnet EM1 is electrically connected to the drive controller 30;

[0065] The drive controller 30 is further configured to drive the first electromagnet EM1 to attract the magnetic metal M when it receives the first trigger signal.

[0066] It should be noted that, in this embodiment, reference is still made to... Figure 2 The first reflector ref1 can also be made of magnetic metal M. Magnetic metal M refers to a metallic material that can be attracted by the magnetic force of an electromagnet or magnet. The first limiting module 21 is also equipped with a first electromagnet EM1, which is used to attract the magnetic metal M in some situations, so that the relative position between the two remains fixed.

[0067] In a specific implementation, when the motor 10 rotates, the first end of the first reflector ref1 can be considered as the center of a circle, and the overall movement trajectory lies on an arc centered at the first end. When the first reflector ref1 moves with the motor 10 to a position a first preset distance away from the first limit, the first reflector ref1 applies pressure to the first limit switch SW1, triggering the first limit switch SW1 to generate a first trigger signal. Upon receiving the first trigger signal from the first limit switch SW1, the drive controller 30 also sends a first limit signal to the first electromagnet EM1 to activate the magnetism of the first electromagnet EM1, attracting the magnetic metal M, thereby fixing the first reflector ref1 at the first limit.

[0068] It is worth noting that in this embodiment, the positions of the first electromagnet EM1 and the magnetic metal M can be interchanged. In this case, it is only necessary to install an electromagnet on the first reflector ref1 and install the first magnetic metal M on the first baffle B1, which can achieve the same function.

[0069] Furthermore, in this embodiment, the drive controller 30 is also used to, upon receiving a switching command, first drive the first electromagnet EM1 to stop attracting the magnetic metal M, and then control the motor 10 to rotate so that the first reflector ref1 leaves the first limit position.

[0070] It should be noted that, in this embodiment, the switching command refers to the following: when the first reflector ref1 is fixed at the first limit position and the first electromagnet EM1 is attracted to the first reflector ref1 by the magnetic metal M, the user needs to switch the optical path to a first preset optical path. The first preset optical path does not require the first reflector ref1 to reflect, therefore the first reflector ref1 needs to be moved away from the first limit position. That is, the switching command can be simply described as the command to make the first reflector ref1 move away from the first limit position. The user sends the switching command to the drive controller 30 through the terminal, or the relevant host or controller generates the switching command according to the preset logic algorithm and sends it to the drive controller 30. After receiving the switching command, the drive controller 30 first controls the first electromagnet EM1 to be powered on or off, so that the magnetic force between the first electromagnet EM1 and the magnetic metal M disappears, that is, the first electromagnet EM1 does not attract the magnetic metal M, so that the magnetic metal M can be moved by the drive of the motor 10 without being subjected to external force; then the drive controller 30 sends a drive signal to the motor 10 to make the motor 10 rotate in the opposite direction and drive the first reflector ref1 away from the first limit position. In some other embodiments, driving the first electromagnet EM1 to not attract the magnetic metal M can also be achieved by generating a magnetic repulsion force between the first electromagnet EM1 and the magnetic metal M. In some other embodiments, the drive controller 30 controls the first reflector ref1 to move away from the first limit and reach the second limit.

[0071] Furthermore, in this embodiment, the first electromagnet EM1 is a de-energized electromagnet.

[0072] It is easy to understand that, as a preferred approach, the first electromagnet EM1 can be a de-energized electromagnet. When the drive controller 30 sends the first limit signal to the first electromagnet EM1, it can be understood that the drive controller 30 stops energizing the first electromagnet EM1. At this time, the first electromagnet EM1 is magnetic because it is not energized and attracts the magnetic metal M. When the drive controller 30 does not send the first limit signal to the first electromagnet EM1, it can be understood that the drive controller 30 starts energizing the first electromagnet EM1. At this time, the first electromagnet EM1 loses its magnetism because it is energized and no longer attracts the magnetic metal M. Through this setting, the situation where the first electromagnet EM1 loses its magnetism due to temperature rise when energized for a long time is avoided, ensuring that the first reflector ref1 can be stably attracted to the first limit, making the optical path switching more stable.

[0073] Furthermore, in this embodiment, the drive controller 30 is also used to control the motor 10 to move the first reflector ref1 to a second limit position based on the received second control command. The second limit position is located on the movement trajectory of the first reflector ref1 and does not intersect with the first preset optical path.

[0074] When the first reflector ref1 is in the second limiting position, the transmission path of the preset wavelength light is the first preset optical path.

[0075] It should be noted that in this embodiment, the second control command refers to the control command that is opposite to the first control command. For example, if the drive controller 30 controls the motor 10 to rotate clockwise when it receives the first control command, then the drive controller 30 controls the motor 10 to rotate counterclockwise when it receives the second control command.

[0076] It is easy to understand that the second limit is set outside the first preset optical path. When the drive controller 30 receives the second control command, it can control the motor 10 to rotate in the opposite direction, driving the first reflector ref1 to move away from the first limit and towards the second limit. When the motor 10 drives the first reflector ref1 to move to the second limit, the first reflector ref1 can no longer reflect the preset wavelength light towards the first preset optical path, so the transmission path of the preset wavelength light will become the first preset optical path.

[0077] Furthermore, in this embodiment, the optical path switching device further includes: a second limiting module 22;

[0078] The second limit module 22 is disposed at the second limit position and is electrically connected to the drive controller 30;

[0079] The second limiting module 22 is used to send a second trigger signal to the drive controller 30 when it is detected that the distance between the first reflector ref1 and the second limit does not exceed a second preset distance, so that the drive controller 30 controls the motor 10 to decelerate and drive the first reflector ref1 to move to the second limit.

[0080] It should be noted that the second limiting module 22 is structurally similar to the first limiting module 21, consisting of a second baffle B2, a second trigger switch, and a second electromagnet EM2. The second baffle B2 is fixed to the second limiting module, mainly serving as a physical limit and fixing components such as the second limiting switch SW2. The second limiting module can be set at the extreme position at the other end of the movement trajectory of the first reflector ref1, and the second limiting module is not located on the first preset optical path.

[0081] In specific implementation, when the motor 10 rotates in the reverse direction, when the first reflector ref1 moves with the motor 10 to a position a second preset distance away from the second limit, the first reflector ref1 applies pressure to the second limit switch SW2, triggering the second limit switch SW2 to generate a second trigger signal. Upon receiving the second trigger signal from the second limit switch SW2, the drive controller 30 also controls the motor 10 to decelerate, causing the first reflector ref1 to move with the decelerating motor 10 and stop at the second limit. Furthermore, the drive controller 30 also sends a second limit signal to the second electromagnet EM2 to activate the magnetism of the second electromagnet EM2, attracting the magnetic metal M, thereby fixing the first reflector ref1 at the second limit.

[0082] It is easy to understand that in this embodiment, the second electromagnet EM2 can also be a de-energized electromagnet. When the drive controller 30 sends the second limit signal, it can be understood that the second electromagnet EM2 is not powered. At this time, the second electromagnet EM2 can maintain its magnetism, attract the magnetic metal M, and fix the first reflector ref1 at the second limit position. When the drive controller 30 does not send the second limit signal, it can be understood that the second electromagnet EM2 is powered. At this time, the second electromagnet EM2 may not maintain its magnetism, and therefore cannot attract the magnetic metal M, and cannot fix the first reflector ref1 at the second limit position.

[0083] Furthermore, in this embodiment, the first preset optical path and the second preset optical path have a common output port.

[0084] It should be understood that, please combine Figure 2 as well as Figure 3 To understand, Figure 3 Only the structures related to the optical path are drawn; the circuit structure and other details are not depicted. Figure 2The details of the structure of the first limiting module 21, the second limiting module 22, etc., described in the previous section are as follows. In this embodiment, a fixed second reflector ref2, a third reflector ref3, and a fourth reflector ref4 are provided on the second preset optical path. The input preset wavelength light is reflected multiple times by the three reflectors, so that when the preset wavelength light enters the second preset optical path, it can still be output in the same direction as the output port of the first preset optical path. This arrangement facilitates the modulation of the preset wavelength light in different optical channels, enabling two optical channels to receive the same preset wavelength light but output light of different wavelengths.

[0085] Furthermore, in this embodiment, the second preset optical path includes a wavelength adjuster 50, which is used to adjust the wavelength of the preset wavelength light;

[0086] The common output port has a dichroic mirror, which is used to keep the transmission direction of the preset wavelength light consistent before and after wavelength adjustment.

[0087] It is easy to understand that the second preset optical path also has a wavelength adjuster 50. The wavelength adjuster 50 can be set at any position in the second preset optical path (a position that does not coincide with each of the reflectors) to adjust the wavelength of the preset wavelength light. Correspondingly, the fourth reflector ref4 can be a dichroic mirror, which can transmit the preset wavelength light before the wavelength adjustment and reflect the preset wavelength light after the wavelength adjustment, so that the light transmission direction of the common output port is the same.

[0088] Furthermore, in this embodiment, the wavelength regulator 50 is a frequency doubling crystal.

[0089] It is easy to understand that in this embodiment, the wavelength adjuster 50 can be a frequency doubling crystal. When the preset wavelength light passes through the frequency doubling crystal in the second preset optical path, its wavelength (frequency) can be changed, thereby outputting light with a frequency twice that of the original (wavelength half that of the original) in the original transmission direction, and outputting it along the second preset optical path.

[0090] It is easy to understand that in this embodiment, the preset wavelength light can be 1064nm wavelength light, and the wavelength-adjusted light can be 532nm wavelength light. Therefore, in this embodiment, the transmission surface of the fourth reflector ref4 can be designed with reference to the structure and materials that minimize refractive index and light loss when transmitting at 1064nm.

[0091] This application also provides an optical path switching method, which is applied to the optical path switching device described above, with reference to... Figure 4 The optical path switching method includes the following steps:

[0092] Step S10: Based on the control command, control the motor to drive the first reflector to move;

[0093] Step S20: Detect the distance between the first reflector and the first limiter;

[0094] Step S30: When the distance is detected to be no more than the first preset distance, the motor is controlled to reduce its rotation speed until the first reflector stops at the first limit position, so that the first reflector at the first limit position switches the transmission path of the preset wavelength light from the first preset optical path to the second preset optical path.

[0095] The optical path switching method provided in this application, applied to the optical path switching device described above, can solve the technical problem of how to switch optical transmission paths more accurately. Compared with the prior art, other embodiments of the optical path switching method provided in this application can all be implemented by the above-described optical path switching device. The beneficial effects of the other embodiments are the same as the beneficial effects of the optical path switching device provided in all the above embodiments, and will not be repeated here.

[0096] One embodiment of this application also provides an optical handle, including the optical path switching device described in any of the above embodiments.

[0097] One embodiment of this application also provides a laser therapy device, including a main unit and the aforementioned optical handle. The main unit and the optical handle are connected via an optical fiber or a light guide arm. The main unit emits light of a preset wavelength through the optical fiber or the light guide arm to the common input port. In some embodiments, the main unit and the optical handle may also be other optical elements used to guide the preset wavelength light to the common input port of a first preset optical path and a second preset optical path on the optical handle.

[0098] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. An optical path switching device, characterized in that, The optical path switching device includes: a motor, a first reflector, a first limiting module, and a drive controller; The drive controller is electrically connected to the motor and the first limit module respectively; The first reflector is fixed to the rotating shaft of the motor; the first limiting module is fixed to the first limiting position, which has a common input port for a first preset optical path and a second preset optical path; the common input port is used to receive light of a preset wavelength. The drive controller is used to control the motor to move the first reflector toward the first limit position based on the received first control command; The first limiting module is used to send a first trigger signal to the drive controller when it detects that the distance between the first reflector and the first limit does not exceed a first preset distance, so that the drive controller controls the motor to reduce the rotation speed until the first reflector stops at the first limit. When the first reflector is in the first limiting position, the transmission path of the preset wavelength light is adjusted from the first preset optical path to the second preset optical path.

2. The optical path switching device as described in claim 1, characterized in that, The first limit module includes: a first limit switch and a first baffle; The first baffle is fixed to the first limit position, and the first limit switch is disposed on the first baffle; the first limit switch is electrically connected to the drive controller; the trigger point of the first limit switch is at a first preset distance from the first limit position. The first limit switch is used to determine that the first reflector is at a first preset distance from the first limit when it is subjected to pressure applied by the first reflector, and to send the first trigger signal to the drive controller.

3. The optical path switching device as described in claim 2, characterized in that, The first reflector is also provided with magnetic metal; The first limiting module further includes: a first electromagnet; The first electromagnet is disposed on the first baffle, and the first electromagnet is electrically connected to the drive controller; The drive controller is further configured to drive the first electromagnet to attract the magnetic metal when it receives the first trigger signal.

4. The optical path switching device as described in claim 3, characterized in that, The drive controller is also configured to, upon receiving a switching command, first drive the first electromagnet to stop attracting the magnetic metal, and then control the motor to rotate so that the first reflector moves away from the first limit position.

5. The optical path switching device as described in claim 3, characterized in that, The first electromagnet is a de-energized electromagnet.

6. The optical path switching device as described in claim 1, characterized in that, The drive controller is further configured to control the motor to move the first reflector to a second limit position based on the received second control command, wherein the second limit position is located on the movement trajectory of the first reflector and does not intersect with the first preset optical path; When the first reflector is in the second limiting position, it restores the transmission path of the preset wavelength light to the first preset optical path.

7. The optical path switching device as described in claim 6, characterized in that, The optical path switching device further includes: a second limiting module; The second limit module is disposed at the second limit position and is electrically connected to the drive controller; The second limiting module is used to send a second trigger signal to the drive controller when it detects that the distance between the first reflector and the second limit does not exceed a second preset distance, so that the drive controller controls the motor to decelerate and drive the first reflector to move to the second limit.

8. The optical path switching device as described in claim 1, characterized in that, The first preset optical path and the second preset optical path have a common output port.

9. The optical path switching device as described in claim 8, characterized in that, The second preset optical path includes a wavelength adjuster, which is used to adjust the wavelength of the preset wavelength light; The common output port has a dichroic mirror, which is used to keep the transmission direction of the preset wavelength light consistent before and after wavelength adjustment.

10. The optical path switching device as described in claim 9, characterized in that, The wavelength regulator is a frequency doubling crystal.

11. A method for switching optical paths, characterized in that, The optical path switching method, applied to any one of claims 1-10, comprises the following steps: Based on control commands, the control motor drives the first reflector to move; Detect the distance between the first reflector and the first limiter; When the distance is detected to be no more than the first preset distance, the motor is controlled to reduce its rotation speed until the first reflector stops at the first limit position, so that the first reflector at the first limit position switches the transmission path of the preset wavelength light from the first preset optical path to the second preset optical path.

12. An optical handle, characterized in that, The optical path switching device includes any one of claims 1-10.

13. A laser therapy device, characterized in that, The device includes a host and the optical handle as described in claim 12, wherein the host and the optical handle are connected by an optical fiber or a light guide arm; the host emits light of a preset wavelength through the optical fiber or the light guide arm to the common input port of the first preset optical path and the second preset optical path.

Images